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1
Firdaus, Mustika, Sulistiono und Bambang Widigdo. „Brackishwater pond development: present status and problems in the Padang Pariaman Regency of West Sumatera, Indonesia“. E3S Web of Conferences 322 (2021): 05009. http://dx.doi.org/10.1051/e3sconf/202132205009.
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Padang Pariaman Regency is one of the coastal regencies in West Sumatra which brackish aquaculture have been developed recently, especially shrimp pond aquaculture. This study was conducted to convey the pond's general condition, including the current status and the problems in aquaculture development. The method used was a desk study through the description of the status and the problems. Based on the study, the development of shrimp ponds increased quickly (63.77 ha) until 2019, which the largest number of ponds was in Batang Anai District, and spreading over 35 points. The production of that shrimp ponds in Padang Pariaman Regency reached 1,500 tons or Rp. 135 million (in 2017), which is marketed locally and outside Padang Pariaman. Problems that arose along with shrimp pond activities are 1. Shrimp pond construction is built very close to coastal areas 2. Shrimp pond activities do not have a business license, 3. Poor waste management of shrimp culture, 4. It is low involvement of the local community as technicians at the shrimp ponds, 5. Business license arrangement is done through third parties, and 6. It is an incompatibility between the area of ponds in the license and the real size of the ponds.
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Prokhorova, Nataliya Vladimirovna, Sergey Vyacheslavovich Bugrov, Yulia Vladimirovna Makarova, Yury Leonidovich Gerasimov, Igor Artemyevitch Platonov und Maksim Glebovich Goryunov. „Heavy metals in coastal soils and sediments of the ponds in Samara“. Samara Journal of Science 11, Nr. 4 (01.12.2022): 91–96. http://dx.doi.org/10.55355/snv2022114113.
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The total contents of Mn, Cr, Ni, Cu, Zn, Pb and Cd in foreshore soils and bottom sediments of 20 ponds have been investigated for the first time in Samara by the method of spectrometry with inductively coupled plasma. It is shown that polymetallic pollution of coastal soils and bottom sediments of 16 ponds out of 20 considered is acceptable; 3 ponds, located in the 13th microdistrict (small pond) and on the Solnechnaya street (large and small ponds), are characterized by moderately hazardous pollution with heavy metals; 1 pond, located in the area of the former Hippodrome, has a high level of pollution of coastal soils. Cu, Zn and Pb should be considered to be the main elements that significantly affected the ecological state of coastal soils and bottom sediments of the studied ponds. Their content in selected samples ranged: from 0,3 to 20,3 for Cu, from 0,2 to 14,9 units for Zn, from 0,2 to 25,2 units of background concentrations to Pb. The analysis of heavy metals average levels in coastal soils and bottom sediments of Samara ponds showed, that bottom sediments were enriched with all analyzed metals except Mn in comparison with coastal soils, whereas Mn was accumulated to upper levels in coastal soils. The location of water bodies in various parts of the urban area relief caused differences between the levels of heavy metals accumulation. For instance, the coastal soils of the ponds located on the watershed between the Saratov reservoir and the Samara River accumulated heavy metals more actively than the coastal soils of the ponds on the Volga slope. The accumulation of heavy metals in bottom sediments on the watershed was more active for Mn, Cr, Zn and Cd whereas in the ponds on the Volga slope it was shown for Ni, Cu and Pb.
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Zou, Zhaohui, Chao Chen, Zhisong Liu, Zili Zhang, Jintao Liang, Huixin Chen und Liyan Wang. „Extraction of Aquaculture Ponds along Coastal Region Using U2-Net Deep Learning Model from Remote Sensing Images“. Remote Sensing 14, Nr. 16 (17.08.2022): 4001. http://dx.doi.org/10.3390/rs14164001.
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The main challenge in extracting coastal aquaculture ponds is how to weaken the influence of the “same-spectrum foreign objects” effect and how to improve the definition of the boundary and accuracy of the extraction results of coastal aquaculture ponds. In this study, a recognition model based on the U2-Net deep learning model using remote sensing images for extracting coastal aquaculture ponds has been constructed. Firstly, image preprocessing is performed to amplify the spectral features. Second, samples are produced by visual interpretation. Third, the U2-Net deep learning model is used to train and extract aquaculture ponds along the coastal region. Finally, post-processing is performed to optimize the extraction results of the model. This method was validated in experiments in the Zhoushan Archipelago, China. The experimental results show that the average F-measure of the method in the study for the four study cases reaches 0.93, and the average precision and average recall rate are 92.21% and 93.79%, which is suitable for extraction applications in aquaculture ponds along the coastal region. This study can quickly and accurately carry out the mapping of coastal aquaculture ponds and can provide technical support for marine resource management and sustainable development.
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Karmakar, Anu Rani, Md Akram Ullah, Md Monjurul Hasan, Liza Akter, Md Milon Sarker, Takaomi Arai, Mohammad Nurul Azim Sikder, Mohammed Fahad Albeshr und Mohammad Belal Hossain. „Sedimentary Nutrient Dynamics in Homestead Fishpond Systems from a Subtropical Coastal Area“. Agriculture 12, Nr. 12 (03.12.2022): 2077. http://dx.doi.org/10.3390/agriculture12122077.
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Homestead ponds are small seasonal ponds that are rarely utilized for fish farming. Culturing fish in these small ponds can boost household fish consumption and cash inflow. The availability of nutrients in the water and sediment, however, plays a significant role in the pond’s natural productivity. This study was conducted to assess nutrient contents and some key physical parameters in the bottom sediments of 30 homestead ponds from the central coast along the Northern Bay of Bengal. Analyses of results showed the average values (±SD) of temperature, pH, electrical conductivity, organic matter (OM), organic carbon (°C), nitrogen (N), phosphorus (P) and sulphur (S) were 17.8 ± 1.12 °C, 7.29 ± 0.11, 0.41 ± 0.09 mS/cm, 29,615.48 ± 10,528.9 mg kg−1, 11,958 ± 6107 mg kg−1, 1030.6 ± 252 mg kg−1, 17.1 ± 13.5 mg kg−1 and 32.6 ± 19.7 mg kg−1 during winter and 27.2 ± 1.81 °C, 6.73 ± 0.12, 0.38 ± 0.17 mS/cm, 19,100.01 ± 13,739.07 mg kg−1, 11,079 ± 7969 mg kg−1, 955 ± 229.4 mg kg−1, 26.6 ± 20.2 mg kg−1 and 23.4 ± 15.9 mg kg−1 during pre-monsoon, respectively. One-way ANOVA revealed no significant differences in the mean value of sediment quality parameters among the selected ponds (p > 0.05) except for phosphorus in the winter season (p < 0.05). The sediment quality variables were found to be in the suitable range for fish culture. Pearson’s correlation coefficient values (r) showed that only organic carbon and nitrogen had a strong significant correlation with organic matter (p < 0.05). Based on Cluster Analysis (CA), two major associations among the nutrients were attained at a 15% similarity level: C, OM, and N in one cluster and P and S in another. The findings showed that the parameters were within the preferable range for aquaculture, and the homestead ponds are average productive ponds.
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Ren, Wei, Ziqiao Feng, Xinyi Wang, Ying Li, Hao Long, Xiaoni Cai, Aiyou Huang und Zhenyu Xie. „Contribution of the Types of Tropical Coastal Aquaculture Ponds to the Differential Distribution of the Family Bacillaceae Bacterial Community“. Aquaculture Research 2023 (02.06.2023): 1–10. http://dx.doi.org/10.1155/2023/4522234.
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The family Bacillaceae bacteria, particularly Bacillus communities, are useful and attractive probiotics with desirable features to fulfill the vast demand for aquaculture. In Hainan Island, the coastal aquaculture ponds hold about 1% of the total area in China, whereas the knowledge of Bacillaceae bacterial communities was limited. Herein, the Bacillaceae bacterial communities in the coastal aquaculture ponds of the artificial ponds (lined with high-density polyethylene plastic sheets) and earthen ponds were investigated by the culturable method. The characteristics of culturable Bacillaceae communities in these two types of coastal aquaculture ponds showed a massive difference. All the culturable Bacillaceae bacteria were identified as Bacillus in the artificial ponds, whereas the earthen ponds were dominated by Bacillus followed by Halobacillus. It is worth noting that the artificial ponds with a low Bacillaceae diversity displayed a high Bacillaceae concentration with a better water quality, whereas the earthen ponds with a higher Bacillaceae diversity and concentration displayed a higher risk of Vibrio infection, indicating that the Bacillaceae concentration than its diversity made a greater contribution to water purification and Vibrio control. This work besides providing a promising strategy for healthy coastal aquaculture by balancing the relationship between Bacillaceae concentration and its diversity also will lay a foundation for the development of probiotic Bacillaceae agents for wastewater purification and disease control.
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Tian, Peng, Yongchao Liu, Jialin Li, Ruiliang Pu, Luodan Cao, Haitao Zhang, Shunyi Ai und Yunze Yang. „Mapping Coastal Aquaculture Ponds of China Using Sentinel SAR Images in 2020 and Google Earth Engine“. Remote Sensing 14, Nr. 21 (26.10.2022): 5372. http://dx.doi.org/10.3390/rs14215372.
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Aquaculture has enormous potential for ensuring global food security and has experienced rapid growth globally. Thus, the accurate monitoring and mapping of coastal aquaculture ponds is necessary for the sustainable development and efficient management of the aquaculture industry. Here, we developed a map of coastal aquaculture ponds in China using Google Earth Engine (GEE) and the ArcGIS platform, Sentinel-1 SAR image data for 2020, the Sentinel-1 Dual-Polarized Water Index (SDWI), and water frequency obtained by identifying the special object features of aquaculture ponds and postprocessing interpretation. Our map had an overall accuracy of 93%, and we found that the coastal aquaculture pond area in China reached 6937 km2 in 2020. The aquaculture pond area was highest in Shandong, Guangdong, and Jiangsu Provinces, and at the city level, Dongying, Binzhou, Tangshan, and Dalian had the most aquaculture pond area. Aquaculture ponds had spatial heterogeneity; the aquaculture pond area in north China was larger than in south China and seaside areas had more pond area than inland regions. In addition, aquaculture ponds were concentrated near river estuaries, coastal plains, and gulfs, and were most dense in the Huang-Huai-Hai Plain and Pearl River Delta. We showed that GEE cloud processing and ArcGIS local processing could facilitate the classification of coastal aquaculture ponds, which can be used to inform and improve decision-making for the spatial optimization and intelligent monitoring of coastal aquaculture, with certain potential for spatial migration.
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Caraco, Nina, Armando Tamse, Osiris Boutros und Ivan Valiela. „Nutrient Limitation of Phytoplankton Growth in Brackish Coastal Ponds“. Canadian Journal of Fisheries and Aquatic Sciences 44, Nr. 2 (01.02.1987): 473–76. http://dx.doi.org/10.1139/f87-056.
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In general, the nutrient most limiting to phytoplankton growth is phosphorus in freshwaters and nitrogen in the sea. We investigated the effect of N and P enrichment to waters from seven brackish, coastal ponds ranging in salinity from 0 to 31 ppt and to nearby coastal seawater (32 ppt). Phytoplankton from the least saline ponds (0–6.5 ppt) responded to P additions, and biomass increased 2–6 times over unenriched controls. Nitrogen additions stimulated phytoplankton growth only in waters from the most saline coastal pond (31 ppt) and seawater. Phytoplankton from ponds of intermediate salinity did not respond when either N or P was added alone but, as in all ponds, increased greatly in biomass when N and P were added in combination. The high salinity at which a switch from P to N limitation occurred could be due to the high N:P loading ratios to these ponds.
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Sun, Zhe, Juhua Luo, Jingzhicheng Yang, Qiuyan Yu, Li Zhang, Kun Xue und Lirong Lu. „Nation-Scale Mapping of Coastal Aquaculture Ponds with Sentinel-1 SAR Data Using Google Earth Engine“. Remote Sensing 12, Nr. 18 (21.09.2020): 3086. http://dx.doi.org/10.3390/rs12183086.
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Global rapid expansion of the coastal aquaculture industry has made great contributions to enhance food security, but has also caused a series of ecological and environmental issues. Sustainable management of coastal areas requires the explicit and efficient mapping of the spatial distribution of aquaculture ponds. In this study, a Google Earth Engine (GEE) application was developed for mapping coastal aquaculture ponds at a national scale with a novel classification scheme using Sentinel-1 time series data. Relevant indices used in the classification mainly include the water index, texture, and geometric metrics derived from radar backscatter, which were then used to segment and classify aquaculture ponds. Using this approach, we classified aquaculture ponds for the full extent of the coastal area in Vietnam with an overall accuracy of 90.16% (based on independent sample evaluation). The approach, enabling wall-to-wall mapping and area estimation, is essential to the efficient monitoring and management of aquaculture ponds. The classification results showed that aquaculture ponds are widely distributed in Vietnam’s coastal area and are concentrated in the Mekong River Delta and Red River delta (85.14% of the total area), which are facing the increasing collective risk of climate change (e.g., sea level rise and salinity intrusion). Further investigation of the classification results also provides significant insights into the stability and deliverability of the approach. The water index derived from annual median radar backscatter intensity was determined to be efficient at mapping water bodies, likely due to its strong response to water bodies regardless of weather. The geometric metrics considering the spatial variation of radar backscatter patterns were effective at distinguishing aquaculture ponds from other water bodies. The primary use of GEE in this approach makes it replicable and transferable by other users. Our approach lays a solid foundation for intelligent monitoring and management of coastal ecosystems.
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Machado, Iberê F., Leonardo F. B. Moreira und Leonardo Maltchik. „Effects of pine invasion on anurans assemblage in southern Brazil coastal ponds“. Amphibia-Reptilia 33, Nr. 2 (2012): 227–37. http://dx.doi.org/10.1163/156853812x638518.
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The destruction of wetlands due to afforestation areas is a common activity in temperate and subtropical regions in Southern America. The expansion of pine in the Coastal Plain of Southern Brazil is out of control and its impacts on aquatic biodiversity are little known. We tested the following hypotheses: the pine occurrence diminishes the anuran richness and abundance in ponds and it changes the anuran composition; the beta-diversity between pine and native grassland matrix ponds (natural ponds) is determined mainly by nestedness. Sampling was carried out from 2007 to 2009 in five ponds in pine invasion matrix and five ponds in native grassland matrix. The natural ponds showed a greater richness of tadpoles (10 species) than pine ponds (5 species). The mean richness of adults was higher in natural ponds than pine ponds throughout the entire study. The species composition was different between natural and pine ponds, for both adults and tadpoles. Comparing natural ponds with each other and the pine ponds with each other, our results showed that neither nestedness nor turnover was determinant for beta-diversity. However, when natural ponds were compared with pine ones, we found that the contribution of nestedness was higher for the anurans beta-diversity than turnover. Increases in the nestedness mechanism indicated that the pine occurrence results in species loss in Southern Brazil ponds. Since 90% of its wetland has been already affected, the removal of Pinus in the conservation areas in southern Brazil is important to minimize their impacts on aquatic biodiversity.
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Sorrie, Bruce A. „Coastal plain ponds in New England“. Biological Conservation 68, Nr. 3 (1994): 225–33. http://dx.doi.org/10.1016/0006-3207(94)90410-3.
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Jiao, Xiangyu, Xiaofei Shi, Ziyang Shen, Kuiyuan Ni und Zhiyu Deng. „Automatic Extraction of Saltpans on an Amendatory Saltpan Index and Local Spatial Parallel Similarity in Landsat-8 Imagery“. Remote Sensing 15, Nr. 13 (05.07.2023): 3413. http://dx.doi.org/10.3390/rs15133413.
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Saltpans extraction is vital for coastal resource utilization and production management. However, it is challenging to extract saltpans, even by visual inspection, because of their spatial and spectral similarities with aquaculture ponds. Saltpans are composed of crystallization and evaporation ponds. From the whole images, existing saltpans extraction algorithms could only extract part of the saltpans, i.e., crystallization ponds. Meanwhile, evaporation ponds could not be efficiently extracted by only spectral analysis, causing the degeneration of saltpans extraction. In addition, manual intervention was required. Thus, it is essential to study the automatic saltpans extraction algorithm of the whole image. As to the abovementioned problems, this paper proposed a novel method with an amendatory saltpan index (ASI) and local spatial parallel similarity (ASI-LSPS) for extracting coastal saltpans. To highlight saltpans and aquaculture ponds in coastal water, the Hessian matrix has been exploited. Then, a new amendatory saltpans index (ASI) is proposed to extract crystallization ponds to reduce the negative influence of turbid water and dams. Finally, a new local parallel similarity criterion is proposed to extract evaporation ponds. The Landsat-8 OLI images of Tianjin and Dongying, China, have been used in experiments. Experiments have shown that ASI can reach at least 70% in intersection over union (IOU) and 78% in Kappa for extraction of crystallization in saltpans. Moreover, experiments also demonstrate that ASI-LSPS can reach at least 82% in IOU and 89% in Kappa on saltpans extraction, at least 13% and 17% better than comparing algorithms in IOU and Kappa, respectively. Furthermore, the ASI-LSPS algorithm has the advantage of automaticity in the whole imagery. Thus, this study can provide help in coastal saltpans management and scientific utilization of coastal resources.
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C., Kishor, O. R. Nataraju, Venkatappa . und A. T. Ramachandra Naik. „Zooplankton Abundance and Growth of Carps in Farm-Ponds of Different Agro-Climatic Zones of Karnataka“. Environment and Ecology 41, Nr. 3D (September 2023): 2129–34. http://dx.doi.org/10.60151/envec/lejp5402.
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Availability of planktons / natural fish food plays an important role in getting better growth of fish from farm ponds. Study was carried out to evaluate the zooplankton community and growth performance of Carp fishes in farm ponds of coastal and malnad agro-climatic regions of Karnataka. All the ponds were manured with cowdung and poultry manure @ 2000 kg/ha. for the production of planktons. Catla, Rohu and common carp fingerlings were stocked in all the ponds @ 10,000 nos. /ha in 1:1:1 ratio and fishes were fed with groundnut oil cake and rice bran (in 1:1 ratio) @ 5% of the body weight every day. The water samples from all the ponds were collected and filtered for zooplanktons using nylon bolting cloth (60 µm). The growth of fishes in terms of weight was recorded. The analyzed zooplankton planktons were classified into 5 class’s viz., Rotifera, Protozoa, Copepoda, Cladocera and Ostracod. Among zooplanktons observed, copepod contributed maximum to zooplankton community followed by rotifers, cladocerans and ostracod. In coastal ponds the average maximum number of zooplankton 10,368 Cells/m3 and minimum number of 176 Cells/m3 were observed. In Malnad ponds the average maximum number of zooplankton 21,797 Cells/m3 and minimum number of 1579 Cells/m3 were observed. The average maximum growth of Catla, Rohu and Common carp was observed in coastal ponds were 884.42, 640.1 and 692.27 gms respectively and in Malnad farm ponds 1080.71, 954.19 and 1023.18 gms respectively. Use of cowdung and poultry manure in combination was found useful for getting better growth in farm ponds of both the regions.
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Haukos, David, Stephanie Martinez und Jeannie Heltzel. „Characteristics of Ponds Used by Breeding Mottled Ducks on the Chenier Plain of the Texas Gulf Coast“. Journal of Fish and Wildlife Management 1, Nr. 2 (01.11.2010): 93–101. http://dx.doi.org/10.3996/032010-jfwm-005.
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Abstract Mottled ducks Anas fulvigula are nonmigratory and primarily depend on habitats associated with coastal marshes of the Gulf Coast for their entire life cycle. Much of remaining available coastal marsh habitats of the Texas Gulf Coast are managed by state and federal agencies. The Texas Gulf Coast breeding population of mottled ducks has recently declined dramatically. To aid in development of management plans for breeding mottled ducks, we estimated the number of potential pair ponds available on the Texas Chenier Plain National Wildlife Refuge Complex relative to marsh type (fresh, intermediate, brackish, and saline), estimated occupancy, compared habitats of used and unused pair ponds, and evaluated pair pond selection relative to marsh type during spring 2004 and 2005. Greater than 18,000 ponds were recorded in >22,400 ha of coastal marsh with >74% of potential pair ponds in the intermediate marsh type. Average pond size of 425 randomly selected ponds across marsh types was 0.09 ha. Pond occupancy was estimated as 1.3% and 2.5% in 2004 and 2005, respectively, in 634 ponds surveyed for presence of mottled duck pairs. Mottled ducks selected for ponds in fresh marsh with short surrounding vegetation associated with recent cattle grazing, but avoided recently (<3 mo prior) burned areas. Pond area was greater with shallower water depth for used compared to unused ponds. The presence and coverage of submergent and emergent vegetation did not influence use of pair ponds by mottled ducks. Development of breeding habitat (pair ponds, nesting cover, brood habitat) in fresh marsh will benefit mottled ducks. Our results indicate development of breeding habitat on the Texas Gulf Coast, and vegetation management using cattle grazing timed for disturbance in fresh marsh during mid- to late winter and early spring will further attract breeding mottled ducks.
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Healy, M., J. G. Webster-Brown, K. L. Brown und V. Lane. „Chemistry and stratification of Antarctic meltwater ponds II: Inland ponds in the McMurdo Dry Valleys, Victoria Land“. Antarctic Science 18, Nr. 4 (14.11.2006): 525–33. http://dx.doi.org/10.1017/s0954102006000575.
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Meltwater ponds in the Victoria Valley and in the Labyrinth at the head of the Wright Valley of Victoria Land were sampled in January (summer) and October (late winter) of 2004 to establish their geochemistry and stratification, and to compare this with that of coastal meltwater ponds at a similar latitude near Bratina Island. In summer, vertical profiles were measured in 14 ponds; 10 were thermally stratified (maximum ΔT = 11.5°C) and 12 demonstrated a conductivity increase (∼25x) in the lowest 10–20 cm of the water column. When 11 of these ponds were resampled in October, the ice columns were stratified with respect to conductivity and five ponds had highly saline (up to 148 mS cm−1), oxygenated basal brines present under the ice. Basal brines and summer melt waters were Na-Cl dominated, and Victoria Valley pond meltwaters were enriched in Ca relative to the Labyrinth ponds. Early gypsum precipitation directs the chemical evolution of residual brine during freezing. These ponds were enriched in NO3 relative to the coastal ponds at Bratina Island, due to dissolution of nitrate-bearing soil salts, and the reduced influence of marine aerosols and biological productivity on pond chemistry.
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Wang, Lin, Yefan Li, Dongzhu Zhang und Zhicai Liu. „Extraction of Aquaculture Pond Region in Coastal Waters of Southeast China Based on Spectral Features and Spatial Convolution“. Water 14, Nr. 13 (29.06.2022): 2089. http://dx.doi.org/10.3390/w14132089.
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To control the negative effects resulting from the disorderly development of aquaculture ponds and promote the development of the aquaculture industry, rapid and accurate identification and extraction techniques are essential. An aquaculture pond is a special net-like water body divided by complex roads and dikes. Simple spectral features or spatial texture features are not sufficient to accurately extract it, and the mixed feature rule set is more demanding on computer performance. Supported by the GEE platform, and using the Landsat satellite data set and corresponding DEM combined with field survey data, we constructed a decision-making model for the extraction of aquaculture ponds in the coastal waters, and applied this method to the coastal waters of Southeast China. This method combined the image spectral information, spatial features, and morphological operations. The results showed that the total accuracy of this method was 93%, and the Kappa coefficient was 0.86. The overlapping proportions of results between the automated extraction and visual interpretation for test areas were all more than 90%, and the average was 92.5%, which reflected the high precision and reliability of this extraction method. Furthermore, in 2020, the total area of coastal aquaculture ponds in the study area was 6348.51 km2, which was distributed primarily in the cities of Guangdong and Jiangsu. Kernel density analysis suggested that aquaculture ponds in Guangdong and Jiangsu had the highest degree of concentration, which means that they face higher regulatory pressure in the management of aquaculture ponds than other provinces. Therefore, this method can be used to extract aquaculture ponds in coastal waters of the world, and holds great significance to promote the orderly management and scientific development of fishery aquaculture.
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Barua, P., H. Zamal und M. S. N. Chowdhury. „Nutrient mass balance for improved traditional coastal shrimp ponds of Bangladesh“. Mesopotamian Journal of Marine Sciences 26, Nr. 2 (25.04.2022): 98–113. http://dx.doi.org/10.58629/mjms.v26i2.174.
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Three category of tidal water exchange system depended ponds have been selected for the experiments which were canal connected, river connected and pond connected pond. Present study was undertaken to estimate the nutrient balance into the coastal shrimp ponds of Cox’s Bazar coastal region. It was found that mineral fertilizer, organic fertilizer, feed, fish and shrimp fry, water supply and rainfall are the nutrient input and crop product (fish, shrimp, crab), crop residues, denitrification, water discharge and sedimentation are the nutrient output for shrimp pond. Estimation of overall nutrient mass balance per hector basis indicates that fertilizer was the highest nutrient contributor as followed by the supplementary feed into the experimental ponds. The total inputs of nitrogen and phosphorus were 78.87 kgha-1cycle-1 and 42.85 kgha-1cycle-1 respectively. Among the input only 34.6 % of nitrogen and 7.20 % of phosphorus were removed as harvested shrimp, fish and crab. A large portion, 38.58 % of N and 91.38 % of P were remained in the sediments and unaccounted for. From the investigation on nutrient balance for 3 categories of shrimp ponds it was concluded that Reuse water or pond connected pond system for coastal shrimp ponds should not be practiced anywhere in Bangladesh
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Priyono, Susilo Budi, und Sri Rahayu. „APLIKASI PENGINDERAAN JAUH DAN SISTEM INFORMASI GEOGRAFIS (SIG) UNTUK PERENCANAAN PENGEMBANGAN TAMBAK BIOCRETE“. Jurnal Perikanan Universitas Gadjah Mada 5, Nr. 2 (01.08.2003): 32. http://dx.doi.org/10.22146/jfs.9036.
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Application of remote sensing and geographic information system (GIS) for planning of biocrete shrimp ponds development was studied in the coastal area between Opak River and Progo River, Bantul Regency. Analysis of land suitability for biocreteshrimp pond used a multi-scoring of some physical variables, i.e. slope, soil texture, distance from coast line, distance from river, annual rainfall, flooded frequency, and landuse. Spatial analysis used a GIS software (ER Mapper 5.5, ARC/Info 3.5 and ARC/View GIS 3.2). The results showed that suitable land fotbiocreteshrimp pond was 73,6 ha. It found on beach ridge area that was distributed at Srandakan, Sanden, and Kretek Region. However, considered on the Detail Planning of Spatial Arrangement at Southern Coastal of Bantul Regency (RDTK PantaiSelaatnKabupatenBantul) and suistanable aquaculture planning, the development of biocrete shrimp ponds should be limited to 36,8 ha (50%), i.e. 18,4 ha ponds at Srandakan and 18,4 ha ponds at Sanden. Biocrete shrimp ponds had to be built at distance about 300 m from cost line.
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Bhattarai, Shreeya, und Prem B. Parajuli. „Best Management Practices Affect Water Quality in Coastal Watersheds“. Sustainability 15, Nr. 5 (23.02.2023): 4045. http://dx.doi.org/10.3390/su15054045.
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Coastal ecosystems are vulnerable due to watershed sediment and nutrient loads. In this study, the hydrology and water quality of two coastal watersheds, Wolf River watershed (WRW) and Jourdan River watershed (JRW), were assessed using the Soil and Water Assessment Tool (SWAT). Model performance evaluation was performed using the coefficient of determination (R2) and the Nash–Sutcliffe Efficiency (NSE). After model calibration and validation, the effectiveness of ponds, wetlands, riparian buffers, and their combination as best management practices (BMPs) were analyzed. Total suspended solids (TSS) was reduced by 31.15% in the pond scenario and 30.37% in the wetland in WRW. In addition, mineral phosphorous (MinP) was reduced by 11.84% and 9.63% in ponds and wetlands, respectively. Similarly, in JRW, TSS was reduced by 74.89% in ponds and 74.90% in wetlands. Likewise, ponds and wetlands reduced MinP by 8.05% and 13.40%, respectively. Among four riparian buffer scenarios, the 30 m buffer prompted the estimation of higher reductions such as TSS by 28.36% and MinP by 29.77% in WRW, whereas a 13.14% TSS and 22.89% MinP reduction in JRW. In addition, combined BMP, TSS was reduced by 30.37% and MinP by 52.09% in WRW, followed by a 74.92% reduction in TSS and 27.37% in MinP in JRW. All BMP implementations were effective in reducing TSS and MinP. This study suggests that ponds and wetlands were effective in reducing TSS and riparian buffers were effective in reducing MinP. These findings could be insightful in coastal watershed management.
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Abnizova, Anna, und Kathy L. Young. „Hillslope hydrological linkages: importance to ponds within a polar desert High Arctic wetland“. Hydrology Research 39, Nr. 4 (01.08.2008): 309–21. http://dx.doi.org/10.2166/nh.2008.007.
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Arctic wetland environments are considered to be sensitive to ongoing climate change but they have received limited attention despite their ecological importance. To understand and quantify better the hydrologic processes which are leading to the sustainability and demise of High Arctic ponds, a water balance framework was employed on several ponds situated in two broad geomorphic areas near Creswell Bay, Somerset Island (72°43′N, 94°15′W). These ponds are also linked to an upland area through a range of linear features: stream, late-lying snowbeds and frost cracks. This study assesses the importance of these features with respect to the sustainability of these wetland ponds. A pond's position in the moraine landscape was important in determining its connectivity to a nearby stream and late-lying snowbed. Close proximity to a stream draining a large upland snow-covered catchment ensures steady water levels during the snowmelt period. Once discharge slows, a late-lying snowbed continues to supply the pond and others nearby with meltwater. The deeply thawed, sandy coastal zone is characterized by frost cracks, which contribute to the patterned ground of this wetland zone. These cracks, when situated downslope of ponds, function primarily as ‘sinks’ and serve to deprive small and medium-sized ponds of water during dry periods, often leading to their desiccation.
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Stenert, Cristina, Roberta C. Bacca, Aline B. Moraes, Arthur C. de Ávila und Leonardo Maltchik. „Negative effects of exotic pine invasion on macroinvertebrate communities in southern Brazil coastal ponds“. Marine and Freshwater Research 63, Nr. 4 (2012): 283. http://dx.doi.org/10.1071/mf11169.
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Exotic pine invasion influences native wetland assemblages by changing environmental conditions such as hydrological regime and physicochemical characteristics. The expansion of cultivated pine has been a concern in southern Brazil and its impacts on aquatic biodiversity are poorly known. We tested the hypotheses that: (1) pine invasion decreases aquatic macroinvertebrate richness and abundance, modifying composition and macroinvertebrate functional feeding groups in ponds; and (2) β-diversity between natural and pine ponds is determined mainly by species nestedness. Five ponds in native grassland and five in a pine-planted matrix were sampled seven times from 2007 to 2009. The pine ponds had reduced macroinvertebrate richness and abundance, and different taxa and functional feeding groups. Comparing ponds in natural and cultivated pine areas, β-diversity as determined by nestedness did not differ from the value resulting from the turnover. Reduction of surface in ponds in pine areas may be one of the main causes for the lower macroinvertebrate richness and abundance because many taxa do not have adaptations to tolerate or escape the dry phase. Our results suggest that pine invasion has a negative impact on macroinvertebrate structure in southern Brazil coastal ponds.
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Fiorini, Flavia, und Stephen W. Lokier. „Abnormal test growth in Larger Benthic Foraminifera from hypersaline coastal ponds of the United Arab Emirates“. Micropaleontology 66, Nr. 2 (2020): 151–56. http://dx.doi.org/10.47894/mpal.66.2.06.
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The larger benthic foraminifera (LBF) assemblage from shallow hypersaline coastal ponds located in the intertidal area of theUnitedArab EmirateWestern Region was investigated. The studied coastal ponds are located between a lagoonal areawith carbonate sedimentation, and a supratidal, evaporite-dominated, sabkha. Epiphytic larger benthic foraminifera, mostly belonging to the genus Peneroplis, dominate the benthic foraminifera assemblage. At all the sampled locations, the larger benthic foraminifera assemblage is characterised by high percentages of tests with abnormal growth. Dissolution and microboring are also common on the majority of LBF tests. The high percentage of abnormal tests reflects natural environmental stress caused by the instability of physical parameters (particularly high and variable salinity and temperature) in this transitional marine environment. The unique presence of epiphytic species in some of the ponds suggests that epiphytic foraminifera are transported into the ponds attached to floating seagrass and subsequently continue to live in the stressed pond environment.
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Lee, Soen Han, Wen Wen Chou und Chen Fa Wu. „Integrated Fuzzy Delphi Method and GIS to Indentify Farm Ponds’ Preservation Values and Spatial Location in Yunlin County, Taiwan“. Advanced Materials Research 610-613 (Dezember 2012): 2644–48. http://dx.doi.org/10.4028/www.scientific.net/amr.610-613.2644.
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Objective of this work is to indentify farm ponds’ preservation values and spatial location for farm ponds conservation in Yunlin County, Taiwan. Conclusions of the Fuzzy Delphi Method and GIS mapping found that farm ponds in western coastal areas presented higher living, production, ecology, and cultural landscapes preservation value, while the inland areas in central plains and the northeast presented the advantages of ecology, living, environmental disaster relief and cultural landscapes.
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Bayuaji, Giri, Astrid Damayanti und Tuty Handayani. „Environmental Quality of Shrimp Ponds in The Coastal Region Of Brebes Regency“. E3S Web of Conferences 73 (2018): 04007. http://dx.doi.org/10.1051/e3sconf/20187304007.
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The largest utilization of coastal areas in Brebes Regency is the shrimp farming ponds. Shrimp volume statistics until 2016 showed that shrimp production in Brebes tends to decrease. The decrease in shrimp production can be caused by disruption in the environmental quality from the surrounding activities. This study aims to analyze the causes of declining production based on the quality of the physical environment of shrimp ponds. The variables used are water quality values (Ph, Tds / Ec, and salino), vegetation values of ponds, and waste disposal values around ponds <1000m, 1000-2000m,> 2000m. The data used is a Quick Bird image as of 2015 to determine the area of shrimp ponds and results of field survey in February 2018 for water quality sampling and observation. The analytical method that is used is scoring and weighting. The grades of pond environment quality that are produced are Poor; Good; and Well. The results show that the subdistricts of Brebes and Wanasari have well environmental quality; Tanjung has good environmental quality; and environmental value of Bulakamba and Losari subdistricts have poor environmental quality. Environmental quality is strongly influenced by industrial activities, onion farming activities, and settlements. This environmental quality study can be utilized for the management of sustainable shrimp farming.
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Choeronawati, Anggih Isti, Slamet Budi Prayitno und Haeruddin. „STUDI KELAYAKAN BUDIDAYA TAMBAK DI LAHAN PESISIR KABUPATEN PURWOREJO“. Jurnal Ilmu dan Teknologi Kelautan Tropis 11, Nr. 1 (01.04.2019): 191–204. http://dx.doi.org/10.29244/jitkt.v11i1.22522.
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ABSTRAKUdang vaname di Kabupaten Purworejo khususnya Kecamatan Grabag memiliki prospek pasar bagus, hal ini menjadikan budidaya tambak udang vaname menjadi peluang yang sangat besar. Seiring berjalannya kegiatan budidaya udang vaname, perlu diperhatikan aspek kelayakan lahan. Penelitian dilakukan dengan tujuan menganalisa kelayakan lahan budidaya tambak udang vaname (Litopenaeus vannamei) di lahan pesisir Kabupaten Purworejo. Penelitian ini difokuskan pada dua lokasi yaitu tambak pesisir desa Ketawangrejo dan Harjobinangun, Kecamatan Grabag Kabupaten Purworejo menggunakan analisis kelayakan lahan dengan metode scoring. Hasil penelitian menunjukkan bahwa kelangsungan hidup dan produksi tergolong cukup tinggi yaitu 90,16% dan 950 kg/0,10 ha untuk tambak pesisir desa Ketawangrejo, dan 81,00% dan 2.825 kg/0,21 ha untuk tambak pesisir desa Harjobinangun. Tingginya nilai kelangsungan hidup dan produksi yang diperoleh berkaitan dengan aspek bioteknis seperti lokasi dan konstruksi tambak, sarana dan prasarana serta sistem budidaya yang termasuk dalam kategori cukup sesuai (S2) baik. ABSTRACTShrimp vaname in Purworejo Regency, especially Grabag Subdistrict, has good market prospects, this makes the cultivation of vaname shrimp ponds an enormous opportunity. Along with the passage of vaname shrimp farming activities, it is necessary to pay attention to feasibility aspects. The study was conducted with the aim of analyzing the feasibility of vaname shrimp farms (Litopenaeus vannamei) on coastal land in Purworejo District. This study focused on two locations namely coastal ponds Ketawangrejo village and Harjobinangun, Grabag District Purworejo Regency using land feasibility analysis using the scoring method. The results showed that survival and production were quite high, namely 90,16% and 950 kg / 0,10 ha for coastal ponds in Ketawangrejo village, and 81,00% and 2.825 kg / 0,21 ha for coastal ponds in the village of Harjobinangun. The high value of survival and production obtained relates to biotechnical aspects such as the location and construction of ponds, facilities and infrastructure as well as cultivation systems which are included in the category of good enough (S2).
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Hou, Yuxuan, Gang Zhao, Xiaohong Chen und Xuan Yu. „Improving Satellite Retrieval of Coastal Aquaculture Pond by Adding Water Quality Parameters“. Remote Sensing 14, Nr. 14 (08.07.2022): 3306. http://dx.doi.org/10.3390/rs14143306.
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Coastal aquaculture is an important supply of animal proteins for human consumption, which is expanding globally. Meanwhile, extensive aquaculture may increase nutrient loadings and environmental concerns along the coast. Accurate information on aquaculture pond location is essential for coastal management. Traditional methods use morphological parameters to characterize the geometry of surface waters to differentiate artificially constructed conventional aquaculture ponds from other water bodies. However, there are other water bodies with similar morphology (e.g., saltworks, rice fields, and small reservoirs) that are difficult to distinguish from aquaculture ponds, causing a lot of omission/commissioning errors in areas with complex land-use types. Here, we develop an extraction method with shape and water quality parameters to map aquaculture ponds, including three steps: (1) Sharpen normalized difference water index to detect and binarize water pixels by the Otsu method; (2) Connect independent water pixels into water objects through the four-neighbor connectivity algorithm; and (3) Calculate the shape features and water quality features of water objects and input them into the classifier for supervised classification. We selected eight sites along the coast of China to evaluate the accuracy and generalization of our method in an environment with heterogeneous pond morphology and landscape. The results showed that six transfer characteristics including water quality characteristics improved the accuracy of distinguishing aquaculture ponds from salt pans, rice fields, and wetland parks, which typically had F1 scores > 85%. Our method significantly improved extraction efficiency on average, especially when aquaculture ponds are mixed with other morphological similar water bodies. Our identified area was in agreement with statistics data of 12 coastal provinces in China. In addition, our approach can effectively improve water objects when high-resolution remote sensing images are unavailable. This work was applied to open-source remote sensing imagery and has the potential to extract long-term series and large-scale aquaculture ponds globally.
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Moreira, Leonardo Felipe Bairos, und Leonardo Maltchik. „Assessing patterns of nestedness and co-occurrence in coastal pond anuran assemblages“. Amphibia-Reptilia 33, Nr. 2 (2012): 261–71. http://dx.doi.org/10.1163/156853812x641721.
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Segregated species co-occurrence and nestedness are two ecological patterns used to measure assemblage structure. We investigated species co-occurrence and nestedness patterns in assemblages of tadpoles and adult anurans in 30 coastal ponds in southern Brazil. Ponds varied in hydroperiod and were classified as temporary or permanent. We explored whether co-occurrence or nestedness varied among ponds in each hydroperiod. Species co-occurrence patterns were analyzed using the C-score index and three null models. In order to quantify nestedness, we used the nestedness metric based on overlap and decreasing fill (NODF). We found seventeen anuran species; however, only 13 species were observed in breeding activity, and 11 species were observed as tadpoles. The co-occurrence and nestedness analyses showed that anuran assemblages exhibit non-random patterns that were generally contingent on the hydroperiod and pond area. Only species in non-breeding adult anurans assemblages showed significant segregation when randomizations were weighted by pond area and the pattern was similar among hydroperiods. Tadpole assemblages of permanent ponds showed an aggregated co-occurrence in weighted-fixed model. In temporary ponds, NODF showed that anuran assemblages were significantly nestedness in all three phases of life cycle. We obtained contrasting results depending on the hydroperiod. These results support the hypothesis that habitat nestedness, due to hydroperiod, might be an important factor structuring anuran assemblages along the different phases of their life cycle.
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Ferdiansyah, D., A. K. Darmawan, E. T. Wahyurini und S. Sugiono. „Shrimp pond suitability index (SPSI) in the north coast of Sumenep Regency“. IOP Conference Series: Earth and Environmental Science 967, Nr. 1 (01.01.2022): 012003. http://dx.doi.org/10.1088/1755-1315/967/1/012003.
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Abstract Utilization of coastal areas for aquaculture in the Regency is currently starting to increase and exceed the allotment of space in coastal areas. However, some ponds change the mangrove ecosystem and do not ignore the environmental impact. Shrimp production is currently still below the environmental carrying capacity which can still be increased. The objectives of this study were: to analyze the land suitability of traditional, semi-intensive, and intensive shrimp ponds that meet the criteria of land suitability and environmental carrying capacity, and to formulate priorities for environmentally friendly alternative aquaculture technologies. This study uses a field survey to analyze the socio-economic community and land use through interviews with ten cultivators and business actors spread across four coastal districts. The research resulted in an analysis of the sustainability indicators of shrimp farming in the coastal area of Sumenep Regency. This research contributes to policy makers and the community to pay more attention to the sustainability indicators of shrimp farming in coastal areas.
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Ballard, Bart M., Corey J. Lange, J. Dale James, Barry C. Wilson, Daniel P. Collins und Jay A. Vonbank. „Prioritizing Conservation of Coastal Ponds for Wintering Redheads“. Journal of Wildlife Management 85, Nr. 4 (06.04.2021): 803–12. http://dx.doi.org/10.1002/jwmg.22034.
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Scholz, O. „Physicochemistry and Vegetation of Piccaninnie Ponds, a Coastal Aquifer-fed Pond in South-eastern South Australia“. Marine and Freshwater Research 41, Nr. 2 (1990): 237. http://dx.doi.org/10.1071/mf9900237.
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The aquatic vegetation and physicochemistry of Piccaninnie Ponds are described and recent annual losses of aquatic vegetation investigated. The aquifer-derived waters of the Ponds are characterized by their clarity, low nutrient content, low salinity, and lack of thermal and chemical stratification. In 1985, large areas of aquatic vegetation within the Ponds degraded and were lost. Subsequent faster regeneration of denuded areas by Ruppia polycarpa resulted in the displacement of Lepilaena cylindrocarpa. The annual uprooting of R. polycarpa, which has occurred since, results from Ruppia's comparatively poorer anchorage capacity in the loose sediment floc. Gradual expansion of L. cylindrocarpa into freshly uprooted regions restricts the regrowth of R. polycarpa and hence the area susceptible to denudation in the following year. It is expected that the displacement of R. polycarpa will continue until only small isolated stands remain, which will be prevented from uprooting by the root matrix of surrounding vegetation.
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Treviño, Jennifer, Miguel Rodríguez-Rodríguez, María José Montes-Vega, Héctor Aguilera, Ana Fernández-Ayuso und Nuria Fernández-Naranjo. „Wavelet Analysis on Groundwater, Surface-Water Levels and Water Temperature in Doñana National Park (Coastal Aquifer in Southwestern Spain)“. Water 15, Nr. 4 (17.02.2023): 796. http://dx.doi.org/10.3390/w15040796.
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The Doñana National Park (DNP) is a protected area with water resources drastically diminishing due to the unsustainable extraction of groundwater for agricultural irrigation and human consumption of a nearby coastal city. In this study, we explore the potential of wavelet analysis applied to high-temporal-resolution groundwater-and-surface-water time series of temporary coastal ponds in the DNP. Wavelet analysis was used to measure the frequency of changes in water levels and water temperature, both crucial to our understanding of complex hydrodynamic patterns. Results show that the temporary ponds are groundwater-dependent ecosystems of a through-flow type and are still connected to the sand-dune aquifer, regardless of their hydrological affection, due to groundwater withdrawal. These ponds, even those most affected by pumping in nearby drills, are not perched over the saturated zone. This was proven by the evidence of a semi-diurnal (i.e., 6 h) signal in the surface-level time series of the shallow temporary ponds. This signal is, at the same time, related to the influence of the tides affecting the coastal sand-dune aquifer. Finally, we detected other hydrological processes that affect the ponds, such as evaporation and evapotranspiration, with a clear diurnal (12 h) signal. The maintenance of the ecological values and services to the society of this emblematic wetland is currently in jeopardy, due to the effect of the groundwater abstraction for irrigation. The results of this study contribute to the understanding of the behavior of these fragile ecosystems of DNP, and will also contribute to sound-integrated water-resource management.
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Meng, Yaru, Jiajun Zhang, Xiaomei Yang und Zhihua Wang. „Spatial–Temporal Mapping and Landscape Influence of Aquaculture Ponds in the Yangtze River Economic Belt from 1985 to 2020“. Remote Sensing 15, Nr. 23 (23.11.2023): 5477. http://dx.doi.org/10.3390/rs15235477.
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Most current research on aquaculture ponds focuses on coastal areas, leaving a gap in understanding of inland regions, such as the strategically significant Yangtze River Economic Belt in China. This study introduces an intelligent extraction method for extensive monitoring of aquaculture ponds in Yangtze River Economic Belt, using Landsat and Sentinel data from 1985 to 2020 with five-year intervals based on the Google Earth Engine (GEE) platform. Land cover change data were also analyzed to understand the impact of aquaculture-related changes. Results indicate a significant increase in aquaculture ponds in the Yangtze River Economic Belt from 3235.51 km2 to 14,207.08 km2 between 1985 and 2020. Aquaculture activity primarily shifted eastward from 1985 to 2015, then westward from 2015 to 2020. Approximately 2018.36 km2 of aquatic areas underwent conversion, mainly to water bodies or croplands, with fewer transitions to impervious surfaces, grasslands, or forests. This study highlights that inland areas can also experience significant increases in aquaculture ponds, particularly alongside large rivers, and that the environmental impacts of these changes differ from those in coastal areas, warranting specific attention.
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Triyatmo, Bambang. „PEMANTAUAN PLANKTON DAN KUALITAS AIR TAMBAK UDANG WINDU INTENSIVE DI LAHAN PASIR PANTAI“. Jurnal Perikanan Universitas Gadjah Mada 5, Nr. 1 (01.02.2003): 33. http://dx.doi.org/10.22146/jfs.8983.
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A research was conducted in intensive ponds of shrimp (Penaeousmonodon) culture located in sandy coastal area Pandansimo, Bantul Regency. Shrimp was cultured in two ponds (± 3.600 m2 each). The bottom of the first pond was 5-10 cm of soil. The second pond used sand originated from the coastal area as the bottom. Shrimps were cultured in the two ponds for 4.5 months. During the culture, plankton and water quality of ponds was observed for 3 times, namely on early, middle and final of shrimp culture.Result of the experiment indicated that 1). Density of plankton in both increased during shrimps culture; 2). Density of plankton in the pond with soil bottom was higher than in that of the pond with sand bottom; 3). The productivity of ponds increased; 4). As higher plankton density increase the absorption of NH4 and PO4, the availability of these nutrient gradually lowered; 5). Species composition of plankton in ponds with soil bottom was dominated by Spirulina sp. Brachionus sp., and Chlorella sp.; 6) In addition species composition of plankton in ponds with sand bottom was dominated by., Brachionus sp., Chlorella sp., Spirulinasp., and Cyclotella sp.; 7) During shrimp culture, the water qualities of the ponds were commonly in the optimal condotions for shrimp; 8) Water quality for the first three months of culture generally was suitable for shrimp culture both in pond with soil and sand bottom. However, after 90 days of culture, the dissolved oxygen in ponds with soil and sand bottom ranged from 2.0 to 3.0 mg/l, which was unsuitable for shrimp culture; 9) The production, survival rates and average body weights of shrimp were 3.18 ton/ha, 12.23 g and 42.3% from pond with soil bottom, and 3.51 ton/ha, 14.43g and 43.38% from pond with sand bottom, respectively.
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Tavares, P. C., D. Alves und M. Shapouri. „Structural Changes in Macroinvertebrate Communities Associated with Reduction in the Management of Coastal Saltpans“. Journal of Marine Biology 2009 (2009): 1–13. http://dx.doi.org/10.1155/2009/629310.
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Saltpans with different management levels were studied for macroinvertebrate community and abiotic variables like water depth, water conductivity, and organic matter in sediments. Significant variation was observed between saltpans, between ponds within saltpans, and between periods within ponds for abundance, and also between saltpans for biomass. Environmental variables varied significantly between saltpans and between ponds. Significant positive correlations occurred between depth and total abundance, between depth and Corixidae abundance, and also between organic matter in sediments and diversity. Significant negative correlations were observed between depth and diversity and between organic matter in sediments and total abundance. Multidimensional Scaling and Canonical Correspondence Analysis confirmed results of analysis of variance and correlations. Invertebrate communities were numerically dominant as also revealed by ABC method. Abandoned saltpan ponds show the largest changes in water depth, with communities dominated by some opportunist species, varying within short temporal scales, which is typical from highly disturbed systems.
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Wait, B. R., J. G. Webster-Brown, K. L. Brown, M. Healy und I. Hawes. „PChemistry and stratification of Antarctic meltwater ponds I: Coastal ponds near Bratina Island, McMurdo Ice Shelf“. Antarctic Science 18, Nr. 4 (14.11.2006): 515–24. http://dx.doi.org/10.1017/s0954102006000563.
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The geochemistry and vertical stratification of shallow meltwater ponds at 78°S near Bratina Island (McMurdo Ice Shelf) have been determined for late winter (October) and summer (January) conditions as part of the Latitudinal Gradient Project. Of the five frozen ponds investigated in October, all were stratified with respect to conductivity, and three had highly saline basal brines beneath the ice at temperatures of −16 to −20°C. In the ice column, inclusions of saline fluid were observed in channels between ice crystals; the abundance increasing with depth and decreasing ice crystal size. In January, seven of the ten ponds investigated (including ponds sampled in October) retained conductivity stratification, whereas significant thermal stratification was observed in only three ponds (maximum ΔT = 5.5°C). Basal brines, ice and meltwaters were Na-Cl or Na-SO4 dominated. FREZCHEM52 modelling, supported by changes in ion ratios, indicated that the precipitation of mirabilite (Na2SO4.10H2O) and gypsum (CaSO4.2H2O) during progressive freezing is an important determinant in chemical evolution of the basal brine. High pH (8.8–11.2) and over-saturation with respect to dissolved oxygen (> 20 mg L−1) in summer, and the presence of sulphide ions in basal brines in winter, occurred in those ponds which experienced high biological productivity during the summer months.
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Kamilatunnisa, A., N. T. M. Pratiwi und S. Hariyadi. „Level of effectiveness of pond wastewater treatment installations with remediation bacteria in Cipatujah“. IOP Conference Series: Earth and Environmental Science 1266, Nr. 1 (01.12.2023): 012010. http://dx.doi.org/10.1088/1755-1315/1266/1/012010.
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Abstract The coastal area in the Cipatujah District has the potential for intensive pond development. However, the development of intensive ponds in the Cipatujah District still needs to be higher. One of the reasons is farmers’ lack of knowledge regarding the system and benefits of intensive ponds, so many ponds still use simple wastewater treatment plants. The impact is a decrease in the quality of the environment around the pond. This study aimed to analyze the effect of bacteria providing remediation on pond effluent on the quality of wastewater and the effectiveness of pond wastewater treatment plants. This research was conducted in three ponds at Cipatujah District, Tasikmalaya Regency, from October 2022 to January 2023. Wastewater samples were taken after harvesting, while siphon water samples were taken every two days since DOC 30. Water samples were analyzed at the Testing Services Laboratory and Certification of IPB, Bogor. Research results show that TSS, BOD, and NH3 content in pond waste decreased by 40 to 70% when the wastewater was treated with remediation bacteria in the form of Aquapro IPB-Microbac+ and when it was retained for five days. The reduction in the organic matter content of pond effluents has increased the quality of the environment around the ponds by 70 to 80%. The conclusion shows that the pond wastewater treatment plant is effective in treating wastewater as the organic waste content of the ponds discharged into the coastal environment decreases.
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Triyatmo, B., und M. Y. Solin. „Productivity of white shrimp (Litopenaeus vannamei, Boone 1931) on semi-intensive cultivation ponds in Parangtritis Village, Bantul Regency“. IOP Conference Series: Earth and Environmental Science 919, Nr. 1 (01.11.2021): 012053. http://dx.doi.org/10.1088/1755-1315/919/1/012053.
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Abstract This study aimed to determine the productivity of white shrimp (Litopenaeus vannamei, Boone 1931) in semi-intensive ponds in Parangtritis Village, Bantul Regency. The study was conducted from January to February 2021. The study was conducted by direct observation of two ponds with a stocking density of average 95 shrimps larvae/m2. The ponds studied had the same area of 2,000 m2, the depth of pond water was 1 m at the edge and 1.5 m in the middle, and the water volume was about 2,500 m3. The source of water was pumped directly from the sea water of Parangtritis Beach, Indian Ocean. The data of ponds shrimp production were obtained from observations of shrimp harvests at that time (as primary data) and yields of several cycles from 2014 to 2020 (as secondary data). The results of data collection were presented descriptively. The results showed that the shrimps were reared in the ponds for each production cycle within 76 to 120 days (average 95 days), harvesting was done partially (1 to 4 times), with pond productivity ranging from 14,600 to 41,175 kg of shrimp/hectare/cycle (average 25,133 kg shrimp/hectare/cycle), feed conversion ratio 1.0 to 2.2 (average 1.3) and survival rate 67 to 100% (average 95%). The productivity of ponds at Parangtritis Village coastal were higher than other Bantul Regency coastal area. These were probably because of : the quantity and quality of water sources were better; the layout of the pond were not too crowded; and stocking densities could be higher and shrimp were partially harvested.
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Lin, Tsang-Yuh, Chung-Ling Chen, Yung-Yen Shih, Hsueh-Han Hsieh, Wei-Ji Huang, Peter H. Santschi und Chin-Chang Hung. „A Smallholders’ Mariculture Device for Rearing Seafood: Environmentally Friendly and Providing Improved Quality“. Sustainability 15, Nr. 1 (03.01.2023): 862. http://dx.doi.org/10.3390/su15010862.
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The aquaculture industry in Taiwan grosses more than USD 1.1 billion annually; however, it also generates considerable waste discharge (causing eutrophication in estuarine and coastal waters) and heavy groundwater withdrawals (causing land subsidence in coastal areas). Many aquaculture facilities using earth ponds are affected by benthic algae, resulting in an earthy odor, and fixed-cage farms are difficult to relocate during cold weather events. In this study, we tested small-scale (~15 ton) mobile cage tanks for the nearshore rearing of white shrimp and grouper in the Yung-An district of Kaohsiung, Taiwan. At the conclusion of the mariculture experiment, the content of free amino acids in shrimp and groupers reared in our mobile tanks surpassed that in animals reared locally in traditional earthy ponds. In a blind taste test involving 42 volunteers, groupers reared in mobile cage tanks were deemed more palatable than those raised in ponds. Our results demonstrate that small-scale mobile cage tanks are a feasible approach to the sustainable rearing of high-quality shrimp or fish. Note that wastewater from the mobile tanks is easily diluted by seawater, thereby reducing the likelihood of eutrophication in coastal regions. The proposed system could also be used for recreational fishing activities to increase income for smallholders of fishermen and/or aquaculture farmers.
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Musa, Muhammad, Febriyani Eka Supriatin, Sri Andayani, Yenny Risjani, Maftuch Maftuch und Asus Maizar Suryanto Hertika. „Sosialisasi Model Budidaya Udang Vaname Dengan Teknologi “Ecogreen Aquaculture” Bagi Petambak Udang Di Wilayah Kecamatan Mayangan Kota Probolinggo“. Journal of Innovation and Applied Technology 8, Nr. 1 (15.07.2022): 1333–38. http://dx.doi.org/10.21776/ub.jiat.2022.008.01.2.
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The coastal area of Mayangan District is the center of the economic development of the city of Probolinggo. Mangrove forest management that lacks environmental standards such as fish and shrimp ponds and mangroves that are within the scope of the area, causes damage and decreases the quality and sustainability of coastal and marine resources. This Community Service intends to introduce intensive shrimp farming techniques in ponds that are environmentally friendly and sustainable as well as introduce the importance of mangrove ecosystems in coastal areas and in supporting the development of fish/shrimp cultivation business activities by socializing the vannamei shrimp cultivation model with "Ecogreen Aquaculture" technology. The forms of service activities that will be carried out include socializing the vannamei shrimp cultivation model , socializing the importance of mangrove ecosystems in improving the environment in supporting the development of aquaculture activities and trial activities of "Ecogreen Aquaculture" technology.
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Mendez, Johnny, Larry D. Hinzman und Douglas L. Kane. „Evapotranspiration from a Wetland Complex on the Arctic Coastal Plain of Alaska“. Hydrology Research 29, Nr. 4-5 (01.08.1998): 303–30. http://dx.doi.org/10.2166/nh.1998.0020.
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Evapotranspiration (ET) from an arctic coastal wetland near Prudhoe Bay, Alaska, was studied during the summers between 1994 and 1996. The purpose of the study was to compare different ET models and to gain a better understanding of evapotranspiration from arctic wetlands. The models used to obtain ET from the watershed were the Bowen ratio energy balance (BREB), Priestley-Taylor (PT), Penman-Monteith (PM), Penman Combination (PC), energy balance (EB), water balance (WB), and WB based on Time Domain Reflectometry (TDR). For one of the ponds, evaporation determined by the EB, PT, PC, BREB, WB, and the aerodynamic (AD) methods were also compared. ET during the summer snow-free period for the watershed averaged 1.45 mm/day obtained via the BREB model. Evaporation from all ponds after spring snowmelt averaged 3.11 mm/day (obtained via the WB). Evaporation rate from ponds was on average twice that of the tundra as a whole. Latent heat flux was the dominant energy sink in wetlands and ponds, whereas sensible heat flux dominated in the drier upland area. The PT and PM models compared well to the BREB (used as the standard of comparison for ET) for 1994 and 1995, once parameters were properly calibrated using 1996 data. The BREB compared well with independent values of ET from the water balance and eddy correlation methods. For the pond, the EB, BREB, WB, PT, and AD methods gave very similar evaporation results for the summer.
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Anton-Pardo, Maria, und Xavier Armengol. „Aquatic invertebrate assemblages in ponds from coastal Mediterranean wetlands“. Annales de Limnologie - International Journal of Limnology 50, Nr. 3 (2014): 217–30. http://dx.doi.org/10.1051/limn/2014089.
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Zampella, Robert A., und Kim J. Laidig. „Functional equivalency of natural and excavated coastal plain ponds“. Wetlands 23, Nr. 4 (Dezember 2003): 860–76. http://dx.doi.org/10.1672/0277-5212(2003)023[0860:feonae]2.0.co;2.
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Burnett, James Wesley, und Christopher Mothorpe. „An Economic Assessment of the Southern Atlantic Coastal Region’s Stormwater Management Practices“. Water Economics and Policy 04, Nr. 04 (Oktober 2018): 1850023. http://dx.doi.org/10.1142/s2382624x18500236.
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This study explores one of the least studied but most widely used instruments to control stormwater runoff — retention ponds. It is surprising that so little research within the economics literature has examined the efficacy of stormwater retention ponds. We address this gap in the literature by (1) offering a brief review of the existing literature; (2) discussing the nature of retention ponds as an impure public good; (3) extending a theoretical model to explain how stormwater runoff is currently managed; and (4) offering illustrative examples of governmental stormwater management practices in the coastal region of South Carolina. We posit that the current regulatory environment leads to a less than socially optimal level of management including a general lack of compliance enforcement and a misunderstanding of resource ownership. If sea levels continue to rise due to global climate change, then the mismanagement of stormwater runoff can lead to potentially severe adverse effects within coastal watersheds and estuarine ecosystems. We propose a combination of subsidy schemes and more-stringent enforcement actions to invoke a socially optimal provision of stormwater management services.
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Ross, Lydia, und Lucia Fanning. „Mobilizing values: using perceptions of barachois ponds in Nova Scotia to advance informed management“. FACETS 6, Nr. 1 (01.01.2021): 215–39. http://dx.doi.org/10.1139/facets-2020-0060.
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Meaningful engagement is increasingly used as a management tool for understanding the multitude of complex values and potential conflicts around marine conservation and the production of conservation strategies deemed acceptable by local communities. Barachois ponds, akin to coastal lagoons, are recognized coastal wetlands in Nova Scotia, Canada, given their distinct ecosystem services, including provisioning, regulating, and cultural services. This study examines the current discourses around the management of barachois ponds and how an increased understanding of these perceptions held by stakeholders and managers might be used to better inform integrated management of these wetland ecosystems. A mixed-methods research design using Q methodology was employed to acquire data on social perceptions surrounding the management of barachois ponds fringing the Bras d’Or Lake in Cape Breton, Nova Scotia, Canada. Four dominant perspectives were identified: the leave-them-be conservationists, the sustainable developers, the management reformists, and the science-based conservationists. Six key issue themes emerged based on an in-depth examination of these different perspectives and Q sort data. This study found that an increased awareness of the ecological, social, and cultural values attributed to barachois ponds by key stakeholders could play a critical role in better informing wetland management decision-making in Nova Scotia and elsewhere.
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Gamito, S., H. Quental-Ferreira, A. Parejo, J. Aubin, V. Christensen und ME Cunha. „Integrated multi-trophic aquaculture systems: energy transfers and food web organization in coastal earthen ponds“. Aquaculture Environment Interactions 12 (05.11.2020): 457–70. http://dx.doi.org/10.3354/aei00375.
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Three Ecopath models were built to reproduce 3 experimental treatments carried out in earthen ponds located in Olhão, southern Portugal, to understand the energy transferred and the ecosystem state in integrated multi-trophic aquaculture (IMTA). These earthen ponds behave as simplified ecosystems or mesocosms, with well-defined borders, where the relationships between trophic groups can be described through ecosystem modeling. Different combinations of species were produced in these ponds, corresponding to the 3 treatments: (1) fish, oysters and macroalgae (FOM); (2) fish and oysters (FO); and (3) fish and macroalgae (FM). The managed species were meagre Argyrosomus regius, white seabream Diplodus sargus, flathead grey mullet Mugil cephalus, Japanese oyster Crassostrea gigas and sea lettuce Ulva spp. The results showed that the total amount of energy throughput was 15 to 17 times higher when compared with an equivalent naturalized system. The high biomass and low recycling indicated an immature system with low resilience and low stability that demands high rates of water renewal and aeration to maintain good water-quality levels for finfish production. The addition of oysters and macroalgae in the FOM treatment appeared to improve the water quality, since oysters controlled the excess of phytoplankton produced in the ponds by ingesting a fair amount of the phytoplankton, while the macroalgae helped in the absorption of excess nutrients and created a habitat for periphyton and associated macroinvertebrates. Some ecosystem attributes of the FOM ponds approached the values of the naturalized model, suggesting a possible path towards more sustainable aquaculture.
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Fauzi, Yulian, Boko Susilo und Zulfia Memi Mayasari. „Analisis Kesesuaian Lahan Wilayah Pesisir Kota Bengkulu melalui Perancangan Model Spasial dan Sistem Informasi Geografis (SIG)“. Forum Geografi 23, Nr. 2 (20.12.2009): 101. http://dx.doi.org/10.23917/forgeo.v23i2.5002.
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This research is aimed to alocate land management and use coastal and ocean area Sub-Province base on digital through Geographical Information System (GIS). This research was done in the coastal area Kota Bengkulu, through spatial alocate analysis and land suitability analysis for brackish water fish ponds, maritime tourism and conservation areas. Approach used in this research is spatial analysis to parameter/variable and land suitability criteria consist of element abiotik, biotik, culture, and spatial use (RTRW). Land suitability analysis is done by using SIG through overlay technique. Result of research indicate that from 7 sub district of coastal area of exist in Kota Bengkulu, land suitability (S1) for brackish water fish ponds are found in sub-district Muara Bangkahulu and Kampung Melayu. Land suitability (S1) for the maritime tourism are found in sub-district Teluk Segara and Ratu Samban, while Land suitability (S1) for conservation area of are found in sub-district Kampung Melayu.
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Davtalab, Rahman, Ali Mirchi, Rebecca J. Harris, Mark X. Troilo und Kaveh Madani. „Sea Level Rise Effect on Groundwater Rise and Stormwater Retention Pond Reliability“. Water 12, Nr. 4 (15.04.2020): 1129. http://dx.doi.org/10.3390/w12041129.
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The coastal areas of Florida, United States, are exposed to increasing risk of flooding due to sea level rise as well as severe hurricanes. Florida regulations suggest constructing stormwater retention ponds as an option to retain excess runoff generated by the increased impervious area and to protect the environment by reducing pollutants from new developments. Groundwater level rise can significantly lower the soil storage capacity and infiltration at retention ponds, in turn, reducing the pond’s capacity to capture consecutive storms due to longer pond volume recovery time. Partial groundwater inundation can affect retention ponds’ ability to decrease peak flow rates and keep the post-development outflow lower than or equal to pre-development conditions. In this paper, the reliability and performance of a retention pond near Tampa Bay, Florida, was evaluated under sea level rise conditions. An integrated surface water and groundwater model was developed, and the groundwater table was projected for future conditions as a function of sea level rise. The results showed that sea level rise could increase the seasonal high water elevation of the retention pond up to 40 cm by mid-21st century. This increase lowered the reliability of the retention pond by about 45%. The pond failed to recover the designed treatment volume within required 72 h because of the high groundwater table, increasing the risk of pollutant discharge. Furthermore, the peak flow and volume of runoff significantly increased under sea level rise and associated groundwater table rise conditions. The study results suggest that it is imperative to consider future sea level rise conditions in stormwater design in low-lying coastal areas of Florida and around the world to prevent poor pond performance and increased risk of flooding in the future.
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Simarmata, Kisvan, Miftah Faridl Widhagdha, Ganuardi Pradipta, Rahadiyand Aditya und Saipullah. „Realizing Gender Equality in Coastal Areas: Conservation of Critical Land and Empowerment of Women“. Asean Social Work Journal 11, Nr. 1 (01.07.2023): 63–73. http://dx.doi.org/10.58671/aswj.v11i1.40.
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The conversion of mangroves into shrimp ponds occurred in the coastal area of Kampung Beting, Pantai Bahagia Village, Bekasi Regency, West Java Province, Indonesia, in the period 1990–2010. High income from shrimp ponds makes people ignore the ecological functions of mangrove forests, one of which is to prevent abrasion. However, since 2010, the destruction of hundreds of hectares of mangrove forests, worsened by climate change that hits almost the whole world, especially island countries like Indonesia, has submerged the shrimp ponds in Pantai Bahagia Village with sea water. Now, not only the shrimp ponds as their major income have disappeared, but also their living space is also threatened by severe abrasion. Gender inequality and the marginalized role of coastal women also make the socio-economic conditions of the community become worse. This study observes the role of women in Pantai Bahagia Village in responding to environmental and socio-economic problems in their area. This study uses a phenomenological approach, data is collected through observation, interviews, and documentation. The results of the study show that women's empowerment plays a role in conserving critical land. Women's responses to environmental problems in their area include: 1) creating changes in women's awareness and behavior as an effort to repair and restore damaged mangrove land, and 2) carrying out activities to protect mangrove plants. Women's responses to socio-economic problems include 1) women's active involvement in productive economic activities 2) Utilization of non-timber mangrove products in processed food and crafts. Finally, this study recommends a concept to address critical coastal land issues, namely by involving women in various activities, both nature conservation and empowerment activities.
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Melnik, Y. T., L. P. Tsaryk und I. R. Kuzyk. „Regulation of economic activities on ponds and reservoirs in the Nichlava river basin“. Man and Environment. Issues of Neoecology, Nr. 38 (25.11.2022): 29–38. http://dx.doi.org/10.26565/1992-4224-2022-38-03.
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Economic development of the territories of small river basins, high anthropogenic load, and flow regulation is correlated with the number of ponds and reservoirs on the river or in its basin. In order to optimize use of natural resources and rational use of water resources in the basin of small rivers, regulation of economic activities on ponds and reservoirs is a relevant task. Since there are 3 reservoirs and more than 80 ponds in the Nichlava river basin, the problem of regulating their economic use is important and urgent from the point of view of revitalizing the water flow and ensuring balanced environmental management in the river basin. Purpose. To assess the geoecological condition of ponds and reservoirs in the Nichlava River basin, to justify optimization measures for the regulation of their economic use and exploitation. Methods. Expeditionary, generalization and systematization, statistical, evaluation, geoecological analysis, system-structural, geo-informational, descriptive, landscape-ecological Results.The peculiarities of the use of artificial water bodies (ponds and reservoirs) in the Nichlava River basin have been considered. Attention to the lack of complex use of resources of water bodies and coastal areas, their pollution and contamination has been drawn. The main sources of pollution and the risks associated with their activities have been indicated. The influence of communal enterprises of the city of Borshchiv on the ecological state of the Borshchiv reservoir during 2010-2020 has been analyzed. The results tend to decrease compared to previous years, although the level of pollution is still significant. The cut-off of part of the Tsyhanka river valley by the Mushkativ reservoir is the result of a malfunction of the locks. Plowing of the coastal areas and contamination of part of the catchment with poisonous chemicals from the fields is observed around the Kotiv reservoir. Ways to restore resources in the basins of small rivers and their effective use by local communities have been substantiated. Conclusions.The processes of economic activity on ponds and reservoirs are becoming more active. Interrelationships between human activity and the geoecological state of ponds and reservoirs in the Nichlava River basin have been revealed. Among the key recommendations substantiated in the work, first of all, there is keeping to the rules of the operation of ponds and reservoirs, defined by the current legislation; restoration of coastal protective strips and water protection zones around reservoirs; reducing of the amounts of dumping of contaminated and insufficiently cleared wastewater into surface water bodies of the Nichlava River basin.
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Huang, W. P., C. Y. Ku, L. K. Chien und C. J. Ye. „Hydraulic Simulation of Waterbird Habitat Reconstruction“. E3S Web of Conferences 101 (2019): 04001. http://dx.doi.org/10.1051/e3sconf/201910104001.
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Cigu wetland consists of industrial salt ponds and lagoon is situated at the coast in the southwestern of Taiwan which is demarcated as Coastal Nature Reserve. The salt ponds experienced declines in bird species diversity and population compared with those within the lagoon area due to the deeper water depths. Different kinds of measures to alter water depths of salt ponds by filling soil are proposed. The hydrodynamic simulations were conducted for studying the hydrodynamic response to proposed reconstruction alternatives. The potential waterbird abundance was then estimated for the alternative recommendation. The methodology proposed in this study can reduce the risk of unexpected results by implementing the reconstruction project directly.
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Jeffries, Michael J. „Pond macrophyte assemblages, biodisparity and spatial distribution of ponds in the Northumberland coastal plain, UK“. Aquatic Conservation: Marine and Freshwater Ecosystems 8, Nr. 5 (September 1998): 657–67. http://dx.doi.org/10.1002/(sici)1099-0755(199809/10)8:5<657::aid-aqc306>3.0.co;2-c.
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