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Relevant bibliographies by topics / Algal bloom control

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Academic literature on the topic 'Algal bloom control'

Author: Grafiati

Published: 4 June 2021

Last updated: 19 February 2022

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Journal articles on the topic "Algal bloom control"

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Jiang, Hao, Jian Liang Rui, Hai Lin Li, De Hua Zhao, Jing Jing Fu, and Shu Qing An. "Research on Algal Bloom Control for Environment Engineering." Applied Mechanics and Materials 340 (July 2013): 971–74. http://dx.doi.org/10.4028/www.scientific.net/amm.340.971.

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Aquatic plants inhibit algae through nutrient competition, sludge sedimentation and the release of allelochemicals in three ways. Investigating Pistia stratiotes L in East Lake, Shao (2001) observed removal rate of the BOD5 achieved more than 70%; the total nitrogen removal efficiency was 60%, the total phosphorus removal efficiency was approximately 70% or more, and this biochemical inhibitory effect may promote algal settlement. Ho Pool (1999) found that the Rhizoma AcoriGraminei could cause a water total nitrogen (TN) removal rate of 87.4%, a total phosphorus (TP) removal rate of 43.9%, and a dissolved oxygen (DO) increase of 26.6%. These studies suggest that through the promotion of the lake TN and TP, aquatic plants influence bio-deposition into sediments, in addition to their role in the nutrient cycling of lakes. Furthermore, many studies have shown that aquatic macrophytes can produce allelochemicals that could inhibit the growth of algae (Donk & Bund, 2002; A. Gross & Boyd, 1998; Elisabeth M. Gross, 2003; E. M. Gross & Sütfeld, 1994; Mulderij, Smolders, & Van Donk, 2006; Mulderij, Van Nes, & Van Donk, 2007).

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Jing, Yuanyuan, Yuchao Zhang, Minqi Hu, Qiao Chu, and Ronghua Ma. "MODIS-Satellite-Based Analysis of Long-Term Temporal-Spatial Dynamics and Drivers of Algal Blooms in a Plateau Lake Dianchi, China." Remote Sensing 11, no. 21 (November 4, 2019): 2582. http://dx.doi.org/10.3390/rs11212582.

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Algal blooms in eutrophic lakes have been a global issue to environmental ecology. Although great progress on prevention and control of algae have been made in many lakes, systematic research on long-term temporal-spatial dynamics and drivers of algal blooms in a plateau Lake Dianchi is so far insufficient. Therefore, the algae pixel-growing algorithm (APA) was used to accurately identify algal bloom areas at the sub-pixel level on the Moderate Resolution Imaging Spectroradiometer (MODIS) data from 2000 to 2018. The results showed that algal blooms were observed all year round, with a reduced frequency in winter–spring and an increased frequency in summer–autumn, which lasted a long time for about 310–350 days. The outbreak areas were concentrated in 20–80 km2 and the top three largest areas were observed in 2002, 2008, and 2017, reaching 168.80 km2, 126.51 km2, and 156.34 km2, respectively. After deriving the temporal-spatial distribution of algal blooms, principal component analysis (PCA) and redundancy analysis (RDA) were applied to explore the effects of meteorological, water quality and human activities. Of the variables analyzed, mean temperature (Tmean) and wind speed (WS) were the main drivers of daily algal bloom areas and spatial distribution. The precipitation (P), pH, and water temperature (WT) had a strong positive correlation, while WS and sunshine hours (SH) had a negative correlation with monthly maximum algal bloom areas and frequency. Total nitrogen (TN) and dissolved oxygen (DO) were the main influencing factors of annual frequency, initiation, and duration of algal blooms. Also, the discharge of wastewater and the southwest and southeast monsoons may contribute to the distribution of algal blooms mainly in the north of the lake. However, different regions of the lake show substantial variations, so further zoning and quantitative joint studies of influencing factors are required to more accurately understand the true mechanisms of algae in Lake Dianchi.

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Zhang, Yuchao, Steven Loiselle, Kun Shi, Tao Han, Min Zhang, Minqi Hu, Yuanyuan Jing, Lai Lai, and Pengfei Zhan. "Wind Effects for Floating Algae Dynamics in Eutrophic Lakes." Remote Sensing 13, no. 4 (February 22, 2021): 800. http://dx.doi.org/10.3390/rs13040800.

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Wind-speed decline is an important impact of climate change on the eastern Asian atmospheric circulation. Although wind does not determine algae biomass in eutrophic lakes, it is a decisive factor in the formation and severity of algae blooms. Based on 2000–2018 MODIS images, this study compared the effects of wind speed on algal blooms in three typical eutrophic lakes in China: Lake Taihu, Lake Chaohu and Lake Dianchi. The results indicate that climate change has different effects on the wind speed of the three lakes, but a common effect on the vertical distribution of algae. A wind speed of 3.0 m/s was identified as the critical threshold in the vertical distribution of chlorophyll-a concentrations in the three study lakes. The basic characteristics of the periodic variation of wind speed were different, but there was a significant negative correlation between wind speed and floating algal bloom area in all three lakes. In addition, considering lake bathymetry, wind direction could be used to identify locations that were particularly susceptible to algae blooms. We estimated that algal bloom conditions will worsen in the coming decades due to the continuous decline of wind, especially in Lake Taihu, even though the provincial and national governments have made major efforts to reduce eutrophication drivers and restore lake conditions. These results suggest that early warning systems should include a wind-speed threshold of 3.0 m/s to improve control and mitigation of algal blooms on these intensively utilized lakes.

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Mayali, Xavier, Peter J. S. Franks, and Farooq Azam. "Cultivation and Ecosystem Role of a Marine Roseobacter Clade-Affiliated Cluster Bacterium." Applied and Environmental Microbiology 74, no. 9 (March 7, 2008): 2595–603. http://dx.doi.org/10.1128/aem.02191-07.

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ABSTRACT Isolation and cultivation are a crucial step in elucidating the physiology, biogeochemistry, and ecosystem role of microorganisms. Many abundant marine bacteria, including the widespread Roseobacter clade-affiliated (RCA) cluster group, have not been cultured with traditional methods. Using novel techniques of cocultivation with algal cultures, we have accomplished successful isolation and propagation of a strain of the RCA cluster. Our experiments revealed that, in addition to growing on alga-excreted organic matter, additions of washed bacterial cells led to significant biomass decrease of dinoflagellate cultures as measured by in vivo fluorescence. Bacterial filtrate did not adversely affect the algal cultures, suggesting attachment-mediated activity. Using an RCA cluster-specific rRNA probe, we documented increasing attachment of these algicidal bacteria during a dinoflagellate bloom, with a maximum of 70% of the algal cells colonized just prior to bloom termination. Cross-correlation analyses between algal abundances and RCA bacterial colonization were statistically significant, in agreement with predator-prey models suggesting that RCA cluster bacteria caused algal bloom decline. Further investigation of molecular databases revealed that RCA cluster bacteria were numerically abundant during algal blooms sampled worldwide. Our findings suggest that the widespread RCA cluster bacteria may exert significant control over phytoplankton biomass and community structure in the oceans. We also suggest that coculture with phytoplankton may be a useful strategy to isolate and successfully grow previously uncultured but ecologically abundant marine heterotrophs.

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Qingxin, Yang. "Algal bloom in Taihu Lake and its control." Journal of Lake Sciences 8, no. 1 (1996): 67–74. http://dx.doi.org/10.18307/1996.0109.

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Zeng, Guoming, Jing Luo, Xiaowan Liu, Maolan Zhang, and Hengjun Tang. "Research on the changes of physiological characteristics of algal cells in the process of algae dissolving by immobilized white rot fungi." E3S Web of Conferences 165 (2020): 05033. http://dx.doi.org/10.1051/e3sconf/202016505033.

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With the increasing of water pollution, water eutrophication is seriously affecting people’s daily life and production. Therefore, it is particularly important to explore safe and efficient algae control technology. In the current algal bloom treatment methods, the physical method is not complete in algae dissolving, and the cost of algal control is high. The chemical method is easy to produce secondary pollution and toxic by-products, and the safety is not high. However, the biological method has the advantages of low cost, high ecological security and good ecological compatibility. It is considered to be a more promising method to remove algae and biological toxins, and it is also an inevitable trend to control water eutrophication in the future.

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Lathrop, Richard C., Stephen R. Carpenter, Craig A. Stow, Patricia A. Soranno, and John C. Panuska. "Phosphorus loading reductions needed to control blue-green algal blooms in Lake Mendota." Canadian Journal of Fisheries and Aquatic Sciences 55, no. 5 (May 1, 1998): 1169–78. http://dx.doi.org/10.1139/f97-317.

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We evaluated the reductions in P loading needed to control blue-green algal blooms in Lake Mendota, Wisconsin. After developing a 21-year loading data set, we used a P mass balance model expressed as a difference equation with an annual time step indexed from mid-April. We defined and estimated a loss parameter lambda as the proportion of the lake's April P concentration lost through sedimentation and outflow during the following year. Using the distribution of annual lambda 's and input loadings, we predicted the steady-state distribution of April P concentrations that would result from scenarios of altered inputs due to changes in management practices. These results were then linked to the probability of summer blue-green algal blooms. For no load reduction, the probability of a bloom (>2 mg algae ·L-1) on any summer day is about 60%. This probability decreases to 20% with a load reduction of 50%. Our approach illustrates how managers can consider reducing the frequency of extreme events like algal blooms, which may correspond more to the public's perception of lake water quality than average conditions.

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Simões, Erik, Renato Campos Vieira, Mathias Alberto Schramm, Danielle Ferraz Mello, Vitor De Almeida Pontinha, Patrícia Mirella da Silva, and Margherita Anna Barracco. "Impact of harmful algal blooms (Dinophysis acuminata) on the immune system of oysters and mussels from Santa Catarina, Brazil." Journal of the Marine Biological Association of the United Kingdom 95, no. 4 (December 1, 2014): 773–81. http://dx.doi.org/10.1017/s0025315414001702.

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Blooms of the harmful alga Dinophysis acuminata, which produces okadaic acid (OA), are becoming recurrent in Santa Catarina coast, where most of the shellfish marine farms in Brazil are located. We evaluated the impact of D. acuminata blooms on various haemato-immunological parameters and on tissue integrity of cultivated oysters (Crassostrea gigas) and mussels (Perna perna). Animals were sampled during two natural algal blooms, one at Praia Alegre (PA: 2950 cells l−1) and the other at Praia de Zimbros (PZ: 4150 cells l−1). Control animals were sampled at the same sites, 30 days after the end of the bloom. The assayed parameters were: total (THC) and differential (DHC) haemocyte counts, percentage of apoptotic haemocytes (AH), phenoloxidase activity (PO), agglutinating titre (AT) and total protein concentration in haemolymph (PC). Histological analyses were carried out in oysters from PZ. The results showed that some immune parameters were modulated during the toxic blooms, but not in a consistent manner, especially in mussels that accumulated more OA (10×) than oysters. For example, mussel THC decreased significantly (54%) during the bloom at PA, whereas it augmented markedly (64%) at PZ. PO activity was significantly altered by the algal blooms in both bivalve species, while PC increased significantly (66%) only in mussels from PZ bloom. The other parameters (DHC, AH and AT) did not vary in both bivalve species. Histological analyses showed an intense haemocytic infiltration throughout the oyster digestive epithelium, particularly into the stomach lumen during the algal bloom.

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Ohadi, Sara, Amar Godar, John Madsen, and Kassim Al-Khatib. "Response of Rice Algal Assemblage to Fertilizer and Chemical Application: Implications for Early Algal Bloom Management." Agronomy 11, no. 3 (March 13, 2021): 542. http://dx.doi.org/10.3390/agronomy11030542.

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California water-seeded rice is challenged with the rapid growth of nuisance algae at the beginning of the season. Rice seedlings entangled in the algal mat may not be established, causing empty rice patches in the field. Two separate studies were conducted to (1) evaluate the effect of nutrients (nitrogen and phosphorous) on algae growth, and (2) test various chemical options to control algae. Both studies utilized 19 L buckets inoculated with algae collected from a rice field. In the nutrient evaluation study, 36 nutrient treatments obtained from a combination of nitrogen (0, 60, 120, 180, 240 and 300 kg ha−1) and phosphorous (0, 20, 40, 60, 80 and 100 kg ha−1) rates were applied into the buckets, while eight chemicals with potential for algae control (two Protox inhibitor herbicides, four copper-based compounds, hydrogen peroxide, Zinc sulfate) were tested in the second experiment. In addition, a yeast extract-based surfactant (AMP activator) was tested in combination with a chelated copper formulation (Algimycin) and hydrogen peroxide. The studies had a completely randomized design with three replicates and each study was repeated two times. The result from the nutrient evaluation study showed that nitrogen and phosphorus can independently cause change in algae growth as reflected in the fresh and dry biomass. Moreover, low rates of either nitrogen or phosphorus resulted in a rapid increase in algae biomass and water chlorophyll a content, whereas the growth of algae declined at higher rates of applied fertilizer. Among tested chemicals in the second experiment, the chelated formulation of copper (Algimycin PWF) controlled algae (85%) better than the ethanolamine formulations [Cutrine-Ultra (70%) and Cutrine-Plus (52%)] and elemental copper (crystalline copper sulfate) (75%). Protox herbicides (oxyfluorfen and oxadiazon) were able to control algae by up to 70%. Hydrogen peroxide controlled algae by 50% and its efficacy dropped dramatically five days after treatment (DAT). Zinc sulfate was only effective at 1 DAT and algae recovered rapidly after that. Combining fertilizer management practices with chemical options will enable us toward an integrative approach for early algal bloom in the rice cropping system.

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Bae, Jong Hyuk, Jae-Hyoung Joo, You Jung Lee, Myung-Soo Han, and Seong Hun Kim. "Fabrication of biodegradable polylactide foam for algal bloom control." Fibers and Polymers 16, no. 10 (October 2015): 2087–93. http://dx.doi.org/10.1007/s12221-015-5555-8.

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Dissertations / Theses on the topic "Algal bloom control"

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Trinko, Tara Rae. "Bottom-Up and Top-Down Controls on Algal Bloom Frequency in Two Shallow Mesotrophic Lakes." Fogler Library, University of Maine, 2008. http://www.library.umaine.edu/theses/pdf/TrinkoTR2008.pdf.

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au, jchen1232005@yahoo com, and Juan Chen. "Sediment remediation as a technique for restoring eutrophic wetlands and controlling nuisance Chironomidae." Murdoch University, 2004. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20050817.102759.

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Eutrophication is a global problem affecting many inland and estuarine waters. Many wetlands on the Swan Coast Plain, in Western Australia, have undergone increasing nutrient enrichment since European settlement of the region in the 1850s. Problems such as algal blooms and nuisance swarms of non-biting midges (Diptera; Chironomidae) are the consequence of nutrient enrichment in many of these wetlands. The restoration of these degraded wetlands, especially with respect to reducing nutrient enrichment, requires a range of comprehensive and effective techniques including catchment management, diversion or treatment of surface inputs and treatment of enriched sediments. Nitrogen and phosphorus, especially phosphorus, are not the only factors controlling algal biomass in water bodies, but they are the only elements that can be removed efficiently and economically. Internal P cycling from wetland sediments can initiate and sustain eutrophication and related algal blooms and nuisance midge problems even after external sources are diverted or reduced. The aim of this study was to identify an effective material to reduce sediment phosphorus release and thereby the phosphorus concentration of the water column. It was also important to determine the impact of the selected amendment material on phytoplankton and larval midge (chironomid) communities. A range of experiments at increasing scales, from bench-top, to microcosm to outdoor mesocosm experiments were designed to test three hypotheses: 1) Materials which have a high P sorption capacity, over a wide range of P solution concentrations, and low P release rate, are potentially suitable agents to reduce P in wetlands with enriched sediments by inactivating sediment P; 2) A reduction in the abundance of cyanobacteria caused by increasing the N:P ratio of an aquatic ecosystem results in a reduction in the density of nuisance species of Chironomidae. 3) Successful amendment of enriched sediments reduces P in the water column thereby reducing the total phytoplankton biomass and the related density of nuisance species of Chironomidae. The adsorption and desorption experiments were carried out under a range of pH values and P concentrations, with a number of materials including fly ash, red mud, precipitated calcium carbonate, crushed limestone and lime to determine the maximum adsorption capacity and affinity of these materials. A rang of P concentrations (0-1000 µg/L) simulated the P concentration of the water column in a range of wetlands of differing trophic status. Poor fits to the Langmuir equation occurred with both red mud and fly ash due to their high P content. A good fit occurred with lime, with a high P removal rate (90%-96%) over the same range. Fly ash and red mud were eliminated from further investigation due to the possibility that they might release phosphorus rather than absorb when P concentrations in surrounding environment were less than 300 µg/L or 200 µg/L respectively (concentrations which can occur in eutrophic systems). Among the three lime-based, redox-insensitive materials tested in the second mesocosm experiments, precipitated calcium carbonate (PCC) possessed the highest maximum adsorption capacity and lowest desorption rate under a range of pH values (6.2, 7.2 and 10) and P concentrations (0-12 000 µg/L), followed by crushed limestone and lime. The different maximum absorption capacities of the three materials appears to be mainly attributed to their particle size (surface area). Lime was chosen as the amendment material for further investigation because it was the only one of the three available in sufficient quantities within the timeframe of this study. Microcosm experiments showed that lime was effective in reducing sediment P release from intact sediment cores, and the ratio of TN:TP in the treatment cores increased over time compared to the control cores (in which TN: TP decreased slightly). In the first mesocosm experiment a significantly higher density of larval midges was found in the treatments than in the controls. The treatments were aimed to increase N:P ratio in the systems to reduce cyanobacteria and, subsequently, larval midge densities. However even though cyanobacteria were eliminated from the treatments, the nitrogen addition appeared to result in higher phytoplankton biomass overall, which fuelled an increase in larval midge densities. In the second mesocosm experiment, the addition of lime to enriched sediments resulted in a reduction in P in the water column. This reduction was accompanied by a reduction in total phytoplankton biomass, the absence of cyanobacteria, and a less abundant and more species - diverse chironomid fauna in the treatment mesocosms. Sediment P fractionation undertaken for both the microcosm and mesocosm experiments showed that most of the phosphorus adsorbed by lime was in the labile fraction (NH3Cl extractable P and NaOH extractable P). Phosphorus in the HCl extractable fraction was also found to be higher in the treatments due to the presence of inert mineral P in the lime than the formation of new hydroxyapatite from adsorbed P. The two mesocosm experiments suggested that larval midges were non-selective feeders, responding to total phytoplankton biomass, rather than the presence of cyanobacteria. Dissolved oxygen and predation also influenced larval midge densities. In summary, although lime appeared to be a useful material for reducing P release from enriched sediments under controlled laboratory conditions, the effect under field conditions was not as definitive. Further work is required to more fully determine the conditions under which sediment remediation may be used as a means of controlling sediment P release and associated high densities of larval chironomids.

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Morrow, Samantha. "Phosphorus Load Control in the Prevention of Harmful Algal Blooms : The Case of Lake Erie, located between the United States of America and Canada." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-157479.

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For over ten years the Western Basin of Lake Erie has been plagued by significant harmful algal blooms (HABs). Lake Erie is a body of water situated between the United States of America (USA) and Canada. The lake provides water to approximately 40 million people and is a considerable source of economic value. The Western Basin of Lake Erie is highly prone to HABs due to the shallow depth and large phosphorus (P) loads received from the large area of agricultural land surrounding the lake and its tributaries. HABs cause extensive ecosystem degradation, have multiple negative health impacts, and cause significant economic losses for the tourism and fishery industries. Five products with P load reducing properties from the three nutrient control categories (biological, physical, and chemical) were chosen to determine how effective their P load reduction pathways were. Additionally, these products were analyzed to determine if they could generate positive remediation effects on the Lake Erie HAB. Of these five products, the technologies Water 3.0 and PO4 Sponge were applied to a Western Basin HAB model generated using the Stella Professional software from ISEE Systems. The two products were modeled individually and collectively to compare the application effects on the HAB model. The model results illustrate the significant reduction in P load and HAB extent that the application of these products at wastewater treatment plants (WWTPs) and within waterways could have. The application of both products at multiple locations within the model showed the greatest P load reduction and nearly eliminated the HAB extent. Unfortunately, the residual P from extensive historical P loading into the lake would prevent such a significant reduction from occurring for over a decade. Current practices and regulations in the Lake Erie Basin are not stimulating P load reductions significant enough to remediate the HAB. As the Western Basin HAB continues to occur annually, the waste stream produced by the HAB remains unutilized. Implementing new and innovative technologies in the basin can generate high quality commodity streams out of the wasted biological algal matter. Meanwhile the implementation of new technologies and practices can help reduce the HAB to a smaller size that would have smaller negative impacts to the economy, health, and ecology.

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Torres, Chuquimarca Gladys Marlene. "Evaluación del fitoplancton como un mecanismo preventivo a la ocurrencia de bloom algal frente a las costas de Esmeraldas, Manta, La Libertad y Puerto Bolivar en Ecuador 2013- 2015." Doctoral thesis, Universidad Nacional Mayor de San Marcos, 2017. https://hdl.handle.net/20.500.12672/6695.

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El fitoplancton es la base de la cadena alimenticia de todo ecosistema acuático, siendo prioritario monitorear la composición y abundancia de especies, como un elemento de la calidad del agua en estudios ambientales, ecológicos, oceanográficos y sanitarios. Se efectuaron monitoreos mensuales del fitoplancton y variables ambientales superficial y subsuperficial durante el 2013 al 2015, en 4 sitios costeros a 10 millas frente a Esmeraldas, Manta, La Libertad y Puerto Bolívar, aplicando metodologías estandarizadas. Los resultados de las variables ambientales presentaron diferencias significativas con mayor amplitud de variabilidad mensual se reflejó en la época húmeda de los 3 años, relacionadas por las condiciones hidrográficas específicas de cada lugar. El año 2015 registró aguas más cálidas por desarrollo del evento El Niño 2015-2016. El fitoplancton registró 215 especies con un total de 64 géneros, que correspondieron principalmente a diatomeas céntricas-pennadas y escasos dinoflagelados. Se estableció rangos de abundancia, con escasos registros de máximas concentraciones en condiciones de agotamiento de nitrato y fosfato. Las dos componentes principales de las variables explicaron entre un 69 a 71% de la variabilidad de todos los datos, lo que implica que otras variables están ejerciendo en el funcionamiento de la dinámica del fitoplancton. Las variables evidenciaron un óptimo nivel de conservación del ecosistema marino costero, con excepción del oxígeno y algunas especies registradas que pueden generar mareas rojas, cuando se cumplan las condiciones para ello, lo que ha evidenciado escasos riesgos en sitios cercanos a la ruta de tráfico marqítimo e inicios de la maricultura.
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方燕珊 and Yin-shan Fong. "Harmful Algal Blooms (HABs) in coastal waters and their management." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2002. http://hub.hku.hk/bib/B3125519X.

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Dufresne, Laura C. "Destruction of algae-produced taste-and-odor compounds by chlorine, potassium permanganate, and chlorine dioxide." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-11242009-020302/.

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Collins, Scott Andrew. "Bottom-Up Controls (Micronutrients and N and P Species) Better Predict Cyanobacterial Abundances in Harmful Algal Blooms Than Top-Down Controls (Grazers)." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/8584.

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The initiation, bloom, and bust of harmful Cyanobacteria and algae blooms (HAB) in lakes are controlled by top-down and bottom-up ecological controls. Excess phosphorous and nitrogen inputs from anthropogenic sources are primary to blame, but eukaryotic grazers may also promote or curb Cyanobacteria dominance. We tracked shifts in bacterial composition, lake chemistry, and eukaryotic grazing community weekly or bi-weekly through spring and summer and modeled the causes of specific Cyanobacterial species blooms and busts across three lakes in Utah, USA, with differing lake trophic states. Regardless of trophic status, all three lakes experienced blooms of varying composition and duration. Aphanizomenon strain MDT14a was the most dominant species in every bloom on Utah Lake, comprising up to 44.16% of the bacterial community. Utah Lake experienced a total of 18 blooms across all sites ranging in duration from one to six weeks. Phormidiaceae sp. (8.5  6.1%) and Microcystis sp. (9.7  4.7%) were the most abundant species in the Deer Creek bloom. Deer creek experienced one bloom at the beginning of fall. Nodularia sp. (9.7  2.1) dominated Great Salt Lake bloom. The Great Salt Lake experienced four separate blooms during the summer months that lasted one to three weeks. Phosphorous concentrations on Utah Lake varied across site and season. Nitrate concentrations on Deer Creek increased over season with a ten-fold increase in concentration. We characterized Cyanobacteria blooms as either bloom communities (growing populations of Cyanobacteria) or as bust communities (declining populations of Cyanobacteria). Using these designations, we modeled the growth and decline of the Cyanobacteria populations across season with top-down and bottom up-controls. Based on generalized least-squared modeling, eukaryotic grazing does not affect relative Cyanobacteria abundances as much as nutrient limitations. Aphanizomenom strain MDT14a was positively correlated with temperature (P < 0.028) and the concentration of K (P = 0.007) and negatively correlated with increases in conductivity (P = 0.0088). Microcystis was positively correlated with increasing levels of SRP (P < 0.001) and negatively correlated with higher Ca concentrations (P = 0.008) and PP (P = 0.008). Busts of Microcystis were related to decreases in nitrate (P = 0.06) and lower total lake depths (P = 0.03). Phormidiaceae sp. relative abundance was negatively correlated with higher levels of TDN (P = 0.01-0.001) and Mg (P = 0.01) and positively correlated with higher S concentrations (P = 0.007). Our findings suggest that micronutrients and more bioavailable forms of P may potentially allow Cyanobacteria to break dormancy and proliferate HAB communities.

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Davis, Angela Brooke. "Characterization of cyanobacteria, cyanophage, and the symbiotic bacterial community in drinking water treatment wastes for sustainable control of HABs." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595001168764676.

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Castro-Castellon, Ana. "A biofilter process for phytoplankton removal prior to potable water treatment works : a field and laboratory study." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:9ac04284-cf4a-48f1-bdab-d8ca6e66aefb.

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Phytoplankton blooms compromise the quality of freshwater ecosystems and the efficient processing of water by treatment works worldwide. This research aims to determine whether in-situ filamentous biofiltration processes mediated by living roots and synthetic filters as media can reduce or remove the phytoplankton loading (micro-algae and cyanobacteria) prior to a potable water treatment works intake. The underlying biofiltration mechanisms were investigated using field and laboratory studies. A novel macroscale biofilter with three plant species, named the "Living-Filter", installed in Farmoor II reservoir, UK, was surveyed weekly for physicochemical and biological variables under continuous flow conditions during 17 weeks. The efficiency of a mesoscale biofilter using the aquatic plant Phalaris arundinacea and synthetic filters, was tested with Microcystis aeruginosa under continuous flow conditions and in batch experiments. The 'simultaneous allelochemical method' was developed for quantifying allelochemicals from Phalaris in aqueous samples. Microscale studies were used to investigate biofilter allelochemical release in response to environmental stressors and Microcystis growth inhibition in filtered and unfiltered aqueous root exudate. Results demonstrate that the removal of phytoplankton biomass by physical mechanisms has a removal efficiency of ≤45% in the "Living-Filter" (filamentous biofilter plus synthetic fabric) and that the removal of Microcystis biomass using only biofilters was 25%. Chemical mechanisms that reduce Microcystis cell numbers are mediated by allelochemicals released from biofilter roots. Root exudate treatments on Microcystis revealed that Microcystis growth is inhibited by allelochemicals, not by nutrient competition, and that protists and invertebrates play a role in removing Microcystis. Filamentous biofilters can remove phytoplankton biomass by physical, chemical and biological mechanisms. Biofilters and synthetic filters in combination improve removal efficiency. Application of macroscale biofilters prior to potable water treatment works benefits the ecosystem. Plant properties, biofilter size to surface water ratio, and retention time must be considered to maximise the benefits of biofiltration processes.

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Pocock, Gina. "Phosphorus limitation as a method of cyanobacterial bloom control." Thesis, 2009. http://upetd.up.ac.za/thesis/available/etd-05302009-120841.

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Books on the topic "Algal bloom control"

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He, Jianzong. He shuo hong chao. [Hong Kong]: Warrior Books, 2012.

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Harmful algal blooms: The challenges on the nation's coastlines : hearing before the Subcommittee on Energy and Environment, Committee on Science and Technology, House of Representatives, One Hundred Tenth Congress, second session, July 10, 2008. Washington: U.S. G.P.O., 2008.

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Sengco, Mario Rhuel. The aggregation of clay minerals and marine microalgal cells: Physicochemical theory and implications for controlling harmful algal blooms. Woods Hole, Mass: Woods Hole Oceanographic Institution, 2001.

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Hamilton, Bruce. A review of short-term management options for Lakes Rotorua and Rotoiti. Wellington [N.Z.]: Ministry for the Environment, 2003.

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Mueller, Karl W. 1997 Green Lake survey: The warmwater fish community of an urban lake plagued by algal blooms and eurasian watermilfoil. Olympia, Wash: Warmwater Enhancement Program, Washington Dept. of Fish and Wildlife, 1998.

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Mueller, Karl W. 1997 Green Lake survey: The warmwater fish community of an urban lake plagued by algal blooms and eurasian watermilfoil. Olympia: Warmwater Enhancement Program, Washington State Dept. of Fish and Wildlife, 1998.

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Giorgio, Catena, Funari E, and Istituto superiore di sanità (Italy), eds. Algal bloom detection, monitoring, and prediction: 3rd workshop "public health" : Istituto superiore di sanità, Rome, April 21-22, 1998 : proceedings. Roma: Istituto superiore di sanità, 1999.

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Harmful Algal Bloom and Hypoxia Research and Control Act of 1998: Report of the Committee on Commerce, Science, and Transportation on S. 1480. Washington: U.S. G.P.O., 1998.

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(Editor), E. Granéli, and J. T. Turner (Editor), eds. Ecology of Harmful Algae (Ecological Studies). Springer, 2006.

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Casitas Municipal Water District (Calif.) and AWWA Research Foundation, eds. Current methodology for the control of algae in surface reservoirs. Denver, Colo: American Water Works Association, 1987.

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Book chapters on the topic "Algal bloom control"

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Sellner, Kevin G., and J. E. Jack Rensel. "Prevention, Control, and Mitigation of Harmful Algal Bloom Impacts on Fish, Shellfish, and Human Consumers." In Harmful Algal Blooms, 435–92. Chichester, UK: John Wiley & Sons, Ltd, 2018. http://dx.doi.org/10.1002/9781118994672.ch12.

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Glibert, Patricia M., Roxane Maranger, Daniel J. Sobota, and Lex Bouwman. "Further Evidence of the Haber-Bosch—Harmful Algal Bloom (HB-HAB) Link and the Risk of Suggesting HAB Control Through Phosphorus Reductions Only." In Just Enough Nitrogen, 255–82. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-58065-0_17.

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Yu, Zhiming, Xiuxian Song, Xihua Cao, and Yang Liu. "Mitigation and Control of Harmful Algal Blooms." In Ecological Studies, 403–23. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70069-4_21.

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Gliwicz, Z. Maciej. "Why do cladocerans fail to control algal blooms?" In Biomanipulation Tool for Water Management, 83–97. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-017-0924-8_8.

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Cheng, Rong, Liang-jie Shen, Shao-yu Xiang, Dan-yang Dai, and Xiang Zheng. "Nanomaterials for Effective Control of Algal Blooms in Water." In Environmental Nanotechnology Volume 5, 173–203. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-73010-9_5.

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El-Sheekh, Mostafa M., Mohamed M. Abdeldaim, Samiha M. Gharib, and HalaY El-Ksassas. "Green Technology Applications for Algal Bloom Control." In Handbook of Algal Technologies and Phytochemicals, 13–21. CRC Press, 2019. http://dx.doi.org/10.1201/9780429057892-2.

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Sigee, David C. "Microorganisms 1." In Freshwater Ecology and Conservation, 133–56. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198766384.003.0007.

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This chapter gives a broad overview of freshwater algae in standing (lentic) and flowing (lotic) waters, with information on their morphological and taxonomic diversity. Algal communities are considered in relation to phytoplankton, substrate-attached and biofilm organisms. Methods are given for their collection, sample processing, enumeration, and biomass estimation in different aquatic situations. The relevance of these algae to human activities is considered particularly in relation to eutrophication of standing waters and the occurrence of harmful algal blooms. Control strategies to limit the growth of colonial blue-green algae are discussed within the context of an integrated management policy

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"Balancing Fisheries Management and Water Uses for Impounded River Systems." In Balancing Fisheries Management and Water Uses for Impounded River Systems, edited by David R. Sager, Aaron Barkoh, David L. Buzan, Loraine T. Fries, Joan A. Glass, Gerald L. Kurten, John J. Ralph, Elizabeth J. Singhurst, Greg M. Southard, and Eric Swanson. American Fisheries Society, 2008. http://dx.doi.org/10.47886/9781934874066.ch18.

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<em>Abstract</em>.—<em>Prymnesium parvum</em>, the golden alga, is a toxin-producing, microscopic alga first identified in U.S. inland waters during a 1985 fish kill on the Pecos River, Texas. Golden alga has been reported in 16 states, and toxic blooms have caused substantial fish kills and loss to recreation. Golden alga releases toxins (prymnesins) that affect gill-breathing organisms but do not affect most aquatic insects and higher vertebrates. The toxins complete formation externally with the addition of cations, and water quality variables such as salinity, temperature, pH, and nutrients influence the toxicity of a bloom. Algae control treatments have been developed for ponds and small reservoirs but are usually too costly and labor intensive for practical use on large water bodies. Potential treatments include ammonia compounds, copper compounds, acid applications, potassium permanganate, ozone, ultraviolet light, and nutrient manipulations. The decision to use treatments must balance expected benefits with costs and possible impacts to the aquatic ecosystem. Treatments must meet federal, state, and local rules and regulations and be coordinated with stakeholders. Research is ongoing to determine bloom dynamics and potential management options for large water bodies.

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Gray, John S., and Michael Elliott. "Temporal variations in benthic assemblages." In Ecology of Marine Sediments. Oxford University Press, 2009. http://dx.doi.org/10.1093/oso/9780198569015.003.0011.

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Most (but by no means all) benthic species have larval stages which use the water column for dispersal. As indicated in the previous chapter, a key process affecting recruitment to sediment systems is the need to disperse larvae in order to colonize new areas, even to the extent of releasing larvae at spring tides when the tidal excursion will be greatest, thus effecting an even greater dispersal. Seasonal release of larvae is the norm: most species develop gametes in spring and spawn in late spring or early summer (see Rasmussen 1973 for an excellent data set of the times of planktonic larval occurrence and settlement by many important north-west European boreal benthic species). Some species, however, avoid the high competition for food at this time and release gametes in autumn and winter. Thus larvae of benthic organisms are a key and often dominating component of the spring–summer plankton and play important roles as food for planktonic species such as fish larvae. Conversely, a number of planktonic species have resting stages in sediments. The most important of these are undoubtedly the diatoms and many flagellates, and also certain calanoid copepods such as Acartia, which are of course key components of the phytoplankton and zooplankton respectively. Diatom cysts are often found, and there is increased interest in the survival and hatching processes of dinoflagellate cysts that lead to harmful algal blooms. Similarly, the seasonal occurrence of many zooplankton species results from hatching of resting stages in the sediment (see Smetacek (1995), Boero et al. (1996), Pati et al. (1999) and Boero and Bonsdorff (2008) for reviews). The implication of many important planktonic species having benthic resting phases is that by predating cysts, benthic species may be able to control abundances of planktonic species. In this context the meiofauna are important predators (Pati et al. 1999). It is now important to consider the scales of temporal variation in benthic assemblages. First, seasonal changes occur in benthic assemblages of soft sediments even in the depths of the deep sea (e.g. Hsü and Thiede 1992). In spring, as light levels and temperature increase, a plankton bloom occurs.

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"10. Control and management of Harmful Algal Blooms." In Climate Change and Marine and Freshwater Toxins, 313–58. De Gruyter, 2015. http://dx.doi.org/10.1515/9783110333596-012.

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Conference papers on the topic "Algal bloom control"

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Luo, Huajun, Defu Liu, and Yingping Huang. "Artificial neural network modeling of algal bloom in Xiangxi Bay of Three Gorges Reservoir." In 2010 International Conference on Intelligent Control and Information Processing (ICICIP). IEEE, 2010. http://dx.doi.org/10.1109/icicip.2010.5564258.

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Kuang, Cuiping, Ling Deng, Lulu He, Shuguang Liu, and Jie Gu. "Effects of wind and water transfer on transport of blue algal bloom in Taihu Lake." In 2010 International Conference on Mechanic Automation and Control Engineering (MACE). IEEE, 2010. http://dx.doi.org/10.1109/mace.2010.5536513.

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Liu, Haidong, Zhongquan Charlie Zheng, and Bryan Young. "Three-Dimensional Computational Hydrodynamics Modeling for Algae Transport and Growth." In ASME 2017 Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/fedsm2017-69050.

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In this study, a three-dimensional model coupling hydrodynamics with algae transport dynamics is investigated. The hydrodynamic model solves the three-dimensional Navier-Stokes equations by a semi-implicit, fractional step method, where the hydrostatic components are determined first and the non-hydrostatic pressure and other components are determined in a subsequent step. Wind velocity on the water surface is accounted for the effect of wind stress on the flow velocities in the hydrodynamic model. Then, the model is coupled with an algae transport model, which enables simulation of algae transport and algal blooms. As an example, the model is implemented to analyze the transition of blue-green algae in Milford Lake, which is the largest man-made lake in Kansas suffering from blue-green algae blooms. The three-dimensional model provides a robust and efficient way for hydrodynamic and algae modeling and can be implemented to studies on different types of rivers and reservoirs easily. The simulated results can be very useful for algae control and prediction in both short and long terms.

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Zhang, Qingling, and Chao Liu. "Dynamical behavior in a differential-algebraic algal blooms model." In 2008 Chinese Control Conference (CCC). IEEE, 2008. http://dx.doi.org/10.1109/chicc.2008.4605893.

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Shi-ming, Li, Wang Xiao-yi, Jin Xue-bo, and Xu Ji-ping. "Evaluation on the algae bloom based on improved combination rule of evidence theory." In 2017 36th Chinese Control Conference (CCC). IEEE, 2017. http://dx.doi.org/10.23919/chicc.2017.8027687.

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Zhao, Xiaoping, Xiaoyi Wang, Zaiwen Liu, Shuoqi Dong, and Xing Zhao. "The research on eruption peak mutation model of lake and reservoir alga bloom." In 2012 10th World Congress on Intelligent Control and Automation (WCICA 2012). IEEE, 2012. http://dx.doi.org/10.1109/wcica.2012.6358375.

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Zhao, Xiao-Dong, and Xiao-Lei Tao. "Competition Trade-offs of Two Bloom Algae under Experimental Non-Steady State Nutrient Limitation." In 2012 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM). IEEE, 2012. http://dx.doi.org/10.1109/cdciem.2012.210.

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Yu, Zhi-ming, Kai Wang, Xi-hua Cao, Bai-zhong Wang, Xiu-xian Song, Bo-tao Xu, Fan Yu, and Xin Xu. "Feasibility and Implementation of the Modified Clay Technique in Control of Phaeocytstis Globosa Blooms in the Water-Intake Area of the Fangchenggang Nuclear Power Plant." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-67637.

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In the current study, we demonstrated the effectiveness of using modified clay as an emergency treatment for controlling Phaeocystis globosa blooms in terms of the removal mechanism, removal rate in both the laboratory and field, and the engineering required. Based on these results, we developed a series of blueprints, including the monitoring and early warning of P. globosa blooms in the water-intake area of the Fangchenggang nuclear power plant (NPP), the manufacture of the modified-clay emergency disposal facilities, and the operation schemes in treating different scale of blooms. From December 2014 to February 2015, modified clay was applied to successfully control P. globosa blooms and to effectively protect the cold-water source of the NPP. Thus, a set of engineering solutions using modified clay was established and confirmed to be a viable approach for treating harmful algae blooms that threaten the cold-water sources of NPPs.

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Patrikalakis, Nicholas M., Joshua Leighton, Georgios Papadopoulos, Gabriel Weymouth, Hanna Kurniawati, Pablo Valdivia y Alvarado, Tawfiq Taher, and Rubaina Khan. "Modeling and Inspection Applications of a Coastal Distributed Autonomous Sensor Network." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83812.

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Real time in-situ measurements are essential for monitoring and understanding physical and biochemical changes within ocean environments. Phenomena of interest usually display spatial and temporal dynamics that span different scales. As a result, a combination of different vehicles, sensors, and advanced control algorithms are required in oceanographic monitoring systems. In this study our group presents the design of a distributed heterogeneous autonomous sensor network that combines underwater, surface, and aerial robotic vehicles along with advanced sensor payloads, planning algorithms and learning principles to successfully operate across the scales and constraints found in coastal environments. Examples where the robotic sensor network is used to localize algal blooms and collect modeling data in the coastal regions of the island nation of Singapore and to construct 3D models of marine structures for inspection and harbor navigation are presented. The system was successfully tested in seawater environments around Singapore where the water current is around 1–2m/s.

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Dong Li, Ze Zhao, Li Cui, He Zhu, Le Zhang, ZhaoLiang Zhang, and Yi Wang. "A cyber physical networking system for monitoring and cleaning up blue-green algae blooms with agile sensor and actuator control mechanism on Lake Tai." In IEEE INFOCOM 2011 - IEEE Conference on Computer Communications Workshops. IEEE, 2011. http://dx.doi.org/10.1109/infcomw.2011.5928908.

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