Journal articles: 'Tropical lakes'

1

Ayyappan, S., J. Oláh, S. L. Raghavan, V. R. P. Sinha, and C. S. Purushothaman. "Macrophyte decomposition in two tropical lakes." Archiv für Hydrobiologie 106, no. 2 (March 24, 1986): 219–31. http://dx.doi.org/10.1127/archiv-hydrobiol/106/1986/219.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Saunders, James F. "Tropical Lakes and Rivers." Ecology 68, no. 4 (August 1987): 1130–31. http://dx.doi.org/10.2307/1938395.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Lewis, W. M. "Biogeochemistry of tropical lakes." SIL Proceedings, 1922-2010 30, no. 10 (April 2010): 1595–603. http://dx.doi.org/10.1080/03680770.2009.11902383.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Criales-Hernández, María I., Diana M. Sanchez-Lobo, and Johanna K. Almeyda-Osorio. "Expanding the knowledge of plankton diversity of tropical lakes from the Northeast Colombian Andes." Revista de Biología Tropical 68, S2 (October 22, 2020): S159—S176. http://dx.doi.org/10.15517/rbt.v68is2.44347.

Full text

Abstract:

Introduction: A large number of planktonic communities found in tropical lakes have not yet been recorded, limiting understanding of how these ecosystems function and of the role that organisms play within them. Objective: Add new records of previously described species and to contribute to the knowledge of the planktonic communities present in tropical mountain and lowland lakes of the northeast Colombian Andes. Methods: Planktonic samples were collected and physicochemical variables measured in nine tropical lakes. Organisms were identified and a bibliographic search was carried out in databases and research articles to the identification of the new records to Colombia. Results: We present the data corresponding to six physicochemical variables measured in tropical lakes of this region and expand the existing information on organisms present in tropical lakes with a list of 391 taxa (299 phytoplankton and 92 zooplankton). The proportion of planktonic species unique to tropical lakes and the low similarity between lake types found with a Jaccard analysis indicated high heterogeneity of ecological conditions in the studied lakes. Conclusions: The 391 taxa found and 15 new records contribute to the list of planktonic organisms present in tropical lakes located in high and low areas of the Colombian northeast Andes.

APA, Harvard, Vancouver, ISO, and other styles

5

Marotta, Humberto, Carlos M. Duarte, Sebastian Sobek, and Alex Enrich-Prast. "Large CO2disequilibria in tropical lakes." Global Biogeochemical Cycles 23, no. 4 (November 13, 2009): n/a. http://dx.doi.org/10.1029/2008gb003434.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Cortés-Guzmán, Daniela, and Javier Alcocer. "Turnover Drives High Benthic Macroinvertebrates’ Beta Diversity in a Tropical Karstic Lake District." Diversity 14, no. 4 (March 30, 2022): 259. http://dx.doi.org/10.3390/d14040259.

Full text

Abstract:

Beta diversity is useful to explain community assembly across landscapes with spatial variation. Its turnover and nestedness components help explain how beta diversity is structured across environmental and spatial gradients. Assessing beta diversity in freshwater ecosystems is essential to conservation, as it reveals the mechanisms that maintain regional diversity. Nonetheless, so far, no studies have examined the beta diversity patterns of benthic macroinvertebrates in tropical lakes. We aimed to examine the beta diversity patterns and components of the deep benthic macroinvertebrate communities of tropical Lakes of Montebello, Mexico, along spatial and environmental gradients. We used presence/absence data of deep benthic macroinvertebrates from 13 lakes distributed along environmental and spatial gradients. We calculated beta diversity indices and correlated them to each lake’s environmental and spatial variables. The macroinvertebrate communities of the Lakes of Montebello showed high beta diversity driven by a turnover pattern that emphasises the importance of regional-scale conservation efforts. Short distances between lakes and high environmental heterogeneity promoted species turnover, resulting in a great singularity level among lakes. We did not find significant correlations between the beta diversity components and the environmental variables, suggesting a random distribution given by the species’ high dispersal capacity in a reduced spatial extent across the lake district.

APA, Harvard, Vancouver, ISO, and other styles

7

Fernández, Rocío, Javier Alcocer, and Luis A. Oseguera. "Regional Pelagic Rotifer Biodiversity in a Tropical Karst Lake District." Diversity 12, no. 12 (November 28, 2020): 454. http://dx.doi.org/10.3390/d12120454.

Full text

Abstract:

The species richness, composition, abundance, and biomass of pelagic rotifers were determined in 17 karst lakes of the “Lagunas de Montebello” National Park, Chiapas, Mexico. The species richness of the region (21 species) and single lakes (1–12 species) was smaller than that of other Mexican, tropical, and temperate lakes. It is worth noting the high dissimilarity in species composition—about half (52%) of the species were observed in only 1–3 lakes. A total of eight rotifer families, all from the Monogononta subclass, were recorded. Keratella americana was the species with the highest occurrence (13 lakes), followed by Ptygura sp. (8 lakes). The abundance (0 to 536 ind L−1) and biomass (0 to 21 µg L−1) of rotifers were low. The highest values of species richness, abundance, and biomass were found in eutrophic lakes, and the lowest in oligotrophic lakes. The low values of rotifer biodiversity, abundance, and biomass in the Montebello lakes are probably the product of the interaction of different factors—such as environmental homogeneity (all water bodies are karst lakes), the low availability of “good-quality” food, and predation by cyclopoid copepods in the eutrophic lakes, and the low availability of food, and competitive interference by calanoid copepods and cladocerans in the oligotrophic lakes.

APA, Harvard, Vancouver, ISO, and other styles

8

Reis, PCJ, and FAR Barbosa. "Diurnal sampling reveals significant variation in CO2 emission from a tropical productive lake." Brazilian Journal of Biology 74, no. 3 suppl 1 (August 2014): S113—S119. http://dx.doi.org/10.1590/1519-6984.01713.

Full text

Abstract:

It is well accepted in the literature that lakes are generally net heterotrophic and supersaturated with CO2 because they receive allochthonous carbon inputs. However, autotrophy and CO2undersaturation may happen for at least part of the time, especially in productive lakes. Since diurnal scale is particularly important to tropical lakes dynamics, we evaluated diurnal changes in pCO2and CO2 flux across the air-water interface in a tropical productive lake in southeastern Brazil (Lake Carioca) over two consecutive days. Both pCO2 and CO2 flux were significantly different between day (9:00 to 17:00) and night (21:00 to 5:00) confirming the importance of this scale for CO2 dynamics in tropical lakes. Net heterotrophy and CO2 outgassing from the lake were registered only at night, while significant CO2 emission did not happen during the day. Dissolved oxygen concentration and temperature trends over the diurnal cycle indicated the dependence of CO2 dynamics on lake metabolism (respiration and photosynthesis). This study indicates the importance of considering the diurnal scale when examining CO2emissions from tropical lakes.

APA, Harvard, Vancouver, ISO, and other styles

9

Fukushima, Takehiko, Fajar Setiawan, Luki Subehi, Muh Fakhrudin, Endra Triwisesa, Aan Dianto, and Bunkei Matsushita. "Convection of waters in Lakes Maninjau and Singkarak, tropical oligomictic lakes." Limnology 23, no. 2 (November 26, 2021): 375–83. http://dx.doi.org/10.1007/s10201-021-00686-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Carney, Heath J., Peter J. Richerson, and Pertti Eloranta. "Lake Titicaca (Peru/Bolivia) phytoplankton: Species composition and structural comparison with other tropical and temperate lakes." Archiv für Hydrobiologie 110, no. 3 (September 30, 1987): 365–85. http://dx.doi.org/10.1127/archiv-hydrobiol/110/1987/365.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Gin, Karina Yew-Hoong, Zhi Yang Sim, Kwan Chien Goh, Jerome Wai Kit Kok, Shu Harn Te, Ngoc Han Tran, Wenxuan Li, and Yiliang He. "Novel cyanotoxin-producing Synechococcus in tropical lakes." Water Research 192 (March 2021): 116828. http://dx.doi.org/10.1016/j.watres.2021.116828.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Fryer, Geoffrey, and A. I. Payne. "The Ecology of Tropical Lakes and Rivers." Journal of Ecology 75, no. 2 (June 1987): 582. http://dx.doi.org/10.2307/2260443.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Das, S. K., and D. Chakrabarty. "Energy transformations in two tropical Oxbow lakes." Toxicological & Environmental Chemistry 88, no. 4 (October 2006): 569–77. http://dx.doi.org/10.1080/02772240600831444.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Cellamare, Maria, Maria Leitão, Michel Coste, Alain Dutartre, and Jacques Haury. "Tropical phytoplankton taxa in Aquitaine lakes (France)." Hydrobiologia 639, no. 1 (December 24, 2009): 129–45. http://dx.doi.org/10.1007/s10750-009-0029-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Cartuche, Alonso, Kalina M. Manoylov, Bastiaan W. Ibelings, and Patrick Venail. "Highest Composition Dissimilarity among Phytoplankton Communities at Intermediate Environmental Distances across High-Altitude Tropical Lakes." Water 13, no. 10 (May 15, 2021): 1378. http://dx.doi.org/10.3390/w13101378.

Full text

Abstract:

Tropical high-altitude lakes are vital freshwater ecosystems for the functioning and dynamics of tropical high-altitude wetlands called páramos, found at over 3300 m above sea level. They play a major role in the hydrogeological cycle and provide important hydrological services such as water storage, and yet they are understudied. Describing the patterns and processes of community composition in these lakes is required to better understand the consequences of their degradation by human activities. In this study we tested the geographical and environmental components of distance–decay relationships in the phytoplankton structure across 24 tropical high-altitude lakes from Southern Ecuador. Phytoplankton composition at the phyla level showed high among-lake variation in the tropical high-altitude lakes from Tres Lagunas. We found no links, however, between the geographic distance and phytoplankton composition. On the contrary, we observed some environmentally related patterns of community structure like redox potential, altitude, water temperature, and total phosphorus. The absence of support for the distance–decay relationship observed here can result from a conjunction of local niche-based effects and dispersal limitations. Phytoplankton community composition in the Tres Lagunas system or any other ecosystem may be jointly regulated by niche-based and neutral forces that still need to be explored. Despite not proving a mechanistic explanation for the observed patterns of community structure, we hope our findings provide understanding of these vulnerable and vital ecosystems. More studies in tropical high-altitude lakes are urgently required.

APA, Harvard, Vancouver, ISO, and other styles

16

Marotta, H., M. L. S. Fontes, and M. M. Petrucio. "Natural events of anoxia and low respiration index in oligotrophic lakes of the Atlantic Tropical Forest." Biogeosciences Discussions 9, no. 4 (April 3, 2012): 4225–44. http://dx.doi.org/10.5194/bgd-9-4225-2012.

Full text

Abstract:

Abstract. Hypoxia is a well-recognized condition reducing biodiversity and increasing greenhouse gases emissions in aquatic ecosystems, especially under warmer temperatures of tropical waters. Anoxia is a natural event commonly intensified by human-induced organic inputs in inland waters. Here, we assessed the partial pressure of O2 (pO2) and CO2 (pCO2) and the ratio between both (represented by the respiration index, RI) in two oligotrophic lakes of the Atlantic Tropical Forest, encompassing dry and rainy seasons over 19 months. We formulated the hypothesis that thermal stratification events could be coupled to natural hypoxia in deep waters of both lakes. Our results indicated a persistence of CO2 emissions from these tropical lakes to the atmosphere, on average ± standard error (SE), 2.3 (±0.3) mmol m−2 h−1 probably subsided by terrestrial C inputs from the forest. Additionally, the thermal stratification during the end of the dry season and the rainy summer was coupled to anoxic events and very low RI in deep waters, and to significantly higher pO2 and RI at the surface (about 20 000 μatm and 1.0, respectively). In contrast, the water mixing during dry seasons in the beginning of the winter was related to a strong destratification in pO2, pCO2 and RI in surface and deep waters, without reaching any anoxic conditions throughout the water column. These findings confirm our hypothesis, suggesting that lakes of the Atlantic Tropical Forest could be dynamic, but especially sensitive to organic inputs. Natural anoxic events indicate that tropical oligotrophic lakes might be highly influenced by human land uses, which increase organic discharges into the watershed.

APA, Harvard, Vancouver, ISO, and other styles

17

Cartuche, Alonso, Ziyu Guan, Bastiaan W. Ibelings, and Patrick Venail. "Phytoplankton Diversity Relates Negatively with Productivity in Tropical High-Altitude Lakes from Southern Ecuador." Sustainability 11, no. 19 (September 24, 2019): 5235. http://dx.doi.org/10.3390/su11195235.

Full text

Abstract:

Tropical high-altitude lakes are vital freshwater reservoirs in the Andean regions. They are heavily threatened by human activities that may alter their functioning and hamper the provisioning of key ecosystem services such as water supply. Despite their ecological and social relevance, we know little about these waterbodies, especially regarding the factors influencing their functioning. Here, we explored the links between several environmental variables and phytoplankton productivity, measured as chlorophyll-a concentration and total phytoplankton biovolume. For this, we sampled twenty-four tropical high-altitude lakes located over three-thousand meters above sea level in Southern Ecuador. We found that four abiotic factors combined explained 76% of the variation in chlorophyll-a concentration amongst lakes. Contrary to what studies from temperate regions suggest, taxa richness was not related to either chlorophyll-a concentrations or total phytoplankton biovolume. Moreover, phytoplankton biovolume diversity was negatively correlated to both chlorophyll-a concentrations and total phytoplankton biovolume. This was due to a very uneven distribution of productivity amongst taxa in the more productive lakes. To the best of our knowledge, this is the first attempt to explore the determinants of phytoplankton functioning in tropical high-altitude lakes. We hope that this study will help to establish a baseline for evaluating the consequences of human activities in the ecology and functioning of this vital but fragile ecosystem. Our results suggest that by modifying the abiotic and biotic parameters of tropical high-altitude lakes, human activities can indirectly impact their functioning and their capacity to provide vital ecosystem services.

APA, Harvard, Vancouver, ISO, and other styles

18

Chen, Guangrong. "Analysis on the distribution of zooplankton in tropical shallow urban lakes." E3S Web of Conferences 257 (2021): 03057. http://dx.doi.org/10.1051/e3sconf/202125703057.

Full text

Abstract:

The distribution characteristics of zooplankton in shallow urban lakes of Lingnan that in the tropics and subtropics were studied. The results showed that Brachionus, Trichocerea, and Lecane were dominant species of composition and abundance. The abundance of large Cladocera was low, which was affected by high water temperature, food restriction, and predation pressure of fish. Rotifera, small Cladocera, and Nauplius were the main zooplankton. Combined with the analysis of typical tropical shallow urban lakes, the dominant zooplankton tended to have a small individual population. It was expected to provide a reference for the ecological restoration of tropical shallow-water urban lakes.

APA, Harvard, Vancouver, ISO, and other styles

19

Timms, BV. "Reconnaissance limnology of some coastal dune lakes of Cape York Peninsula, Queensland." Marine and Freshwater Research 37, no. 2 (1986): 167. http://dx.doi.org/10.1071/mf9860167.

Full text

Abstract:

All nine lakes studied are small (mean area 32 ha), shallow (< 5 m deep), watertable exposures in thin dunes overlying laterite or sandstone. Their water is fresh (mean salinity 52 mg I-1), acid (mean pH 4.8) and dominated by Na+ and Cl-, but with appreciable amounts of Ca2+, Mg2+ and HCO3-. Almost all macrophytes, littoral invertebrates, fish and limnetic zooplankters are common tropical species. A few species are shared with dune lakes in southern Australia and even fewer are endemic. Hence, these tropical dune lakes are different from those in temperate and subtropical eastern Australia.

APA, Harvard, Vancouver, ISO, and other styles

20

Marotta, H., M. L. S. Fontes, and M. M. Petrucio. "Natural events of anoxia and low respiration index in oligotrophic lakes of the Atlantic Tropical Forest." Biogeosciences 9, no. 8 (August 1, 2012): 2879–87. http://dx.doi.org/10.5194/bg-9-2879-2012.

Full text

Abstract:

Abstract. Hypoxia is a well-recognized condition reducing biodiversity and increasing greenhouse gas emissions in aquatic ecosystems, especially under warmer temperatures of tropical waters. Anoxia is a natural event commonly intensified by human-induced organic inputs in inland waters. Here, we assessed the partial pressure of O2 (pO2) and CO2 (pCO2), and the ratio between them (represented by the respiration index, RI) in two oligotrophic lakes of the Atlantic Tropical Forest, encompassing dry and rainy seasons over 19 months. We formulated the hypothesis that thermal stratification events could be coupled to natural hypoxia in deep waters of both lakes. Our results indicated a persistence of CO2 emissions from these tropical lakes to the atmosphere, on average ± standard error (SE) of 17.4 mg C m−2 h−1 probably subsided by terrestrial C inputs from the forest. Additionally, the thermal stratification during the end of the dry season and the rainy summer was coupled to anoxic events and very low RI in deep waters, and to significantly higher pO2 and RI at the surface (about 20 000 μatm and 1.0, respectively). In contrast, the water mixing during dry seasons at the beginning of the winter was related to a strong destratification in pO2, pCO2 and RI in surface and deep waters, without reaching any anoxic conditions throughout the water column. These findings confirm our hypothesis, suggesting that lakes of the Atlantic Tropical Forest could be dynamic, but especially sensitive to organic inputs. Natural anoxic events indicate that tropical oligotrophic lakes might be highly influenced by human land uses, which increase organic discharges into the watershed.

APA, Harvard, Vancouver, ISO, and other styles

21

Vincent, S. G. T., J. H. Salahudeen, P. S. Godson, S. R. Abhijith, A. V. Nath, K. A. Krishnan, N. S. Magesh, S. K. Kumar, and S. A. Moses. "Environmental factors influencing methanogenic activity in two contrasting tropical lake sediments." Journal of Environmental Biology 42, no. 2 (March 1, 2021): 211–19. http://dx.doi.org/10.22438/jeb/42/2/mrn-1413.

Full text

Abstract:

Aim: To investigate the influence of environmental variables on the abundance and activity of methanogenic archaea (MA) in Akkulam-Veli and Vellayani Lake sediments. Methodology: Sediment and overlying water samples (n=5 each) were collected from Veli and Vellayani lakes of Thiruvananthapuram, Kerala. Samples were analysed for environmental variables using standard protocols. Multivariate analysis was done to study the influence of environmental variables on abundance and activity of MA. Results: Environmental variables of overlying water and sediment showed significant variation between the two lakes. Salinity and sulphate were more in Akkulam-Veli than Vellayani, as Akkulam-Veli is a brackish lake and temporarily connected with Arabian Sea. Highly reduced sediments of Akkulam-Veli favoured more population of methylotrophic and acetoclastic MA than Vellayani. A distributional difference of MA with depth was observed in both lakes, which is attributed to availability of more labile organic matter. The methylotrophic MA activity was not significantly different between the two lakes; however, their abundance was significantly different. Nevertheless, methane production was higher in Vellayani than in Akkulam-Veli Lake. PCA revealed that Corg and labile organic matter (LOM) were the important environmental variables influencing methane production potential. Interpretation: Anthropogenic activities like sewage and waste disposal results in increased input of organic matter in lake sediments. The labile organic matter fraction in the sediments favours methanogenic activity thereby resulting in methane production and release from the lakes. Key words: Labile organic matter, Methanogenic archaea, Methane production, Sulphate reduction, Tropical lakes

APA, Harvard, Vancouver, ISO, and other styles

22

Yusoff, F. M., M. S. Ismail, A. T. Law, and A. Anton. "Nutrient availability in tropical lakes of varying trophy." SIL Proceedings, 1922-2010 26, no. 2 (December 1997): 420–26. http://dx.doi.org/10.1080/03680770.1995.11900748.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Goshu, Goraw, M. Strokal, C. Kroeze, A. A. Koelmans, and J. J. M. de Klein. "Assessing seasonal nitrogen export to large tropical lakes." Science of The Total Environment 731 (August 2020): 139199. http://dx.doi.org/10.1016/j.scitotenv.2020.139199.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Salcedo, Miguel Ángel, Allan Keith Cruz-Ramírez, Alberto J. Sánchez, Nicolás Álvarez-Pliego, Rosa Florido, Violeta Ruiz-Carrera, and Sara Susana Morales-Cuetos. "Water Quality Indicators in Three Surface Hydraulic Connection Conditions in Tropical Floodplain Lakes." Water 14, no. 23 (December 2, 2022): 3931. http://dx.doi.org/10.3390/w14233931.

Full text

Abstract:

Water quality indicators have been tied to natural or man-made surface hydraulic connection (SHC) conditions. Among these, temporally connected lakes (TCL) are hydraulic intermediates between isolated (IL) and permanently connected lakes (PCL). Therefore, the aim of this study is to answer if water quality indicators can estimate the possible overlap between the two opposed conditions of SHC (IL and PCL) with the intermediate one (TCL) in lakes with similar modifications in the water level regulation at the basin level. Among nine water variables sampled in six lakes with the three SHC conditions mentioned, chlorophyll a (Chl-a), Secchi disk (SD), and total phosphorus (TP) were identified as quality water indicators through principal component analysis. Furthermore, said indicators were used to measure their overlap and trophic state index deviations. The Chl-a, SD, and TP values in TCL showed a 0.72 overlap of PCL and IL. TP surplus measured in all the lakes was meaningful in urbanized ILs and lessened in a rural lake (PCL6) with submerged rooted macrophytes. The estimated overlap of trophic indicators between TCL, IL, and PCL in this study must be verified at a global representative scale for predictive and preventive use in the conservation of tropical coastal plain lakes.

APA, Harvard, Vancouver, ISO, and other styles

25

Borics, Gábor, István Grigorszky, Judit Padisák, Francisco A. R. Barbosa, and Zsuzsanna Z.-Doma. "Dinoflagellates from tropical Brazilian lakes with description of Peridinium brasiliense sp. nova." Algological Studies/Archiv für Hydrobiologie, Supplement Volumes 118 (December 1, 2005): 47–61. http://dx.doi.org/10.1127/1864-1318/2006/0118-0047.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Beaver, John R., and Thomas L. Crisman. "Importance of Latitude and Organic Color on Phytoplankton Primary Productivity in Florida Lakes." Canadian Journal of Fisheries and Aquatic Sciences 48, no. 7 (July 1, 1991): 1145–50. http://dx.doi.org/10.1139/f91-138.

Full text

Abstract:

A characterization of primary productivity patterns in subtropical Florida lakes along increasing gradients of both dissolved organic color and phytoplankton biomass is presented. Volumetric expression of gross primary productivity was more strongly correlated with chlorophyll a and nutrient concentrations than was areal expression. Primary production in clearwater (<75 Pt units) lakes was more predictable than colored (>75 Pt units) lakes. Areal production in Florida lakes was intermediate to the tropical and temperate regions, although volumetric productivity during the vegetative season (May–September) was not significantly different from temperate zone lakes for the same period. Predictive abilities of empirical equations describing primary productivity in Florida lakes are improved by distinguishing colored and clear lakes.

APA, Harvard, Vancouver, ISO, and other styles

27

Vargas-Sánchez, Mariana, Javier Alcocer, Salvador Sánchez-Carrillo, Luis A. Oseguera, Erika M. Rivera-Herrera, Ismael Soria-Reinoso, Andrea Guzmán-Arias, Felipe García-Oliva, and Martín Merino-Ibarra. "Carbon Dioxide Concentration and Emissions along a Trophic Gradient in Tropical Karst Lakes." Water 15, no. 1 (December 21, 2022): 13. http://dx.doi.org/10.3390/w15010013.

Full text

Abstract:

Inland aquatic ecosystems are valuable sentinels of anthropic-associated changes (e.g., agriculture and tourism). Eutrophication has become of primary importance in altering aquatic ecosystem functioning. Quantifying the CO2 emissions by inland aquatic ecosystems of different trophic statuses may provide helpful information about the role of eutrophication on greenhouse gas emissions. This study investigated diel and seasonal carbon dioxide (CO2) concentrations and emissions in three tropical karst lakes with different trophic statuses. We measured CO2 emissions using static floating chambers twice daily during the rainy/warm and dry/cold seasons while the lakes were thermally stratified and mixed, respectively. The CO2 concentration was estimated by gas chromatography and photoacoustic spectroscopy. The results showed a significant seasonal variation in the dissolved CO2 concentration (CCO2) and the CO2 flux (FCO2), with the largest values in the rainy/warm season but not along the diel cycle. The CCO2 values ranged from 13.3 to 168.6 µmol L−1 averaging 41.9 ± 35.3 µmol L−1 over the rainy/warm season and from 12.9 to 38.0 µmol L−1 with an average of 21.0 ± 7.2 µmol L−1 over the dry/cold season. The FCO2 values ranged from 0.2 to 12.1 g CO2 m−2 d−1 averaging 4.9 ± 4.0 g CO2 m−2 d−1 over the rainy/warm season and from 0.1 to 1.7 g CO2 m−2 d−1 with an average of 0.8 ± 0.5 g CO2 m−2 d−1 over the dry/cold season. During the rainy/warm season the emission was higher in the eutrophic lake San Lorenzo (9.1 ± 1.2 g CO2 m−2 d−1), and during the dry/cold the highest emission was recorded in the mesotrophic lake San José (1.42 ± 0.2 g CO2 m−2 d−1). Our results indicated that eutrophication in tropical karst lakes increased CO2 evasion rates to the atmosphere mainly due to the persistence of anoxia in most of the lake’s water column, which maintained high rates of anaerobic respiration coupled with the anaerobic oxidation of methane. Contrarily, groundwater inflows that provide rich-dissolved inorganic carbon waters sustain emissions in meso and oligotrophic karstic tropical lakes.

APA, Harvard, Vancouver, ISO, and other styles

28

Pinto-Coelho, Ricardo, Bernadette Pinel-Alloul, Ginette Méthot, and Karl E. Havens. "Crustacean zooplankton in lakes and reservoirs of temperate and tropical regions: variation with trophic status." Canadian Journal of Fisheries and Aquatic Sciences 62, no. 2 (February 1, 2005): 348–61. http://dx.doi.org/10.1139/f04-178.

Full text

Abstract:

The influence of trophic status on the crustacean zooplankton community was investigated in lakes and reservoirs in temperate and subtropical-tropical regions. We tested if there is a consistent relationship between crustacean species richness, assemblages, and abundance and trophic indices such as total phosphorus and chlorophyll a. We also examined if these patterns differ between regions. Cumulative species richness and assemblages varied among regions. The greatest number of crustacean species was found in the temperate oligotrophic region with the largest number of lakes sampled. However, cumulative species richness was similar in temperate and subtropicaltropical regions when comparing subsets with a similar number of lakes and reservoirs. The relationships between species richness and latitude or trophic status were difficult to assess owing to imbalance among regions in number of lakes and reservoirs sampled and to biogeography and fish predation potential influences. Trophic status was associated with changes in abundance of all major crustacean zooplankton groups. Eutrophic ecosystems supported greater crustacean abundances at all latitudes. However, cladocerans and cyclopoids were more abundant in eutrophic lakes and reservoirs, whereas calanoids were more abundant in temperate oligotrophic lakes. Total phosphorus was found to be a better predictor of the biomass of major crustacean groups than chlorophyll a in all regions.

APA, Harvard, Vancouver, ISO, and other styles

29

Sigala, Itzel, Socorro Lozano-García, Jaime Escobar, Liseth Pérez, and Elvia Gallegos-Neyra. "Testate Amoebae (Amebozoa: Arcellinida) in Tropical Lakes of Central Mexico." Revista de Biología Tropical 64, no. 1 (June 28, 2016): 377. http://dx.doi.org/10.15517/rbt.v64i1.18004.

Full text

Abstract:

Testate amoebae are common single-celled eukaryotic organisms in aquatic ecosystems. Despite their important role in these ecosystems, and their potential as bioindicators and paleoindicators, they remain poorly studied in Mexico. The major objectives of this study were to: 1) increase knowledge of testate amoebae in Mexico’s tropical lakes, and 2) create a catalog of high-quality scanning electron micrographs that can be used for future ecological and paleoenvironmental studies. We collected surface-sediment samples from 29 lakes, located in the Transmexican Volcanic Belt, one at each lake during June and October 2011, and March 2013. Sediments were collected with an Ekman grab and preserved in anhydrous ethanol. Sub-samples were observed under a stereomicroscope and morphometric data for each species were recorded. Total diameter and aperture diameter were measured on circular tests. Irregularly shaped tests were measured for length and width of the aperture and for the size of the whole test. If a specimen possessed spines, the length of one randomly selected spine was measured. The best-preserved specimen of each taxon was photographed with an optical microscope and a scanning electron microscope (SEM). We found 41 taxa of testate amoebae belonging to the genera: Arcella, Centropyxis, Cucurbitella, Cyclopyxis, Cyphoderia, Difflugia, Euglypha, Lesquereusia, Pentagonia, Pseudodifflugia and Scutiglypha. Twelve species not previously reported for Mexico were recorded, along with 13 varieties. The average number of taxa recorded in each lake was eight, and the highest taxonomic richness was 18. The taxon found in the greatest number of lakes was Centropyxis aculeata var. aculeata. Taxonomic richness varied among lakes in the same region. This could reflect lake-specific differences in environmental conditions, underscoring the need for more detailed studies that include collection of data on physical and chemical variables in the lakes. Our results highlighted the need of further studies for the distribution patterns and ecology of lacustrine testate amoebae.

APA, Harvard, Vancouver, ISO, and other styles

30

Umi, Wahidah Ahmad Dini, Fatimah Md Yusoff, Ahmad Zaharin Aris, Zati Sharip, and Artem Y. Sinev. "Planktonic Microcrustacean Community Structure Varies with Trophic Status and Environmental Variables in Tropical Shallow Lakes in Malaysia." Diversity 12, no. 9 (August 24, 2020): 322. http://dx.doi.org/10.3390/d12090322.

Full text

Abstract:

A study was conducted to evaluate planktonic microcrustacean species composition, abundance, and diversity in lakes with different trophic status and to determine the relationship between microcrustacean community structure and lake environmental conditions. This study hypothesized that there are correlations between eutrophication levels and microcrustacean community structures in a lake. Three shallow lakes of different trophic status (Sembrong, Putrajaya and Subang lakes) were selected for this study. Two-Way Analysis of similarities (ANOSIM) revealed differences in microcrustacean diversity and density amongst lakes, where the hypereutrophic condition in Sembrong lake resulted in the lowest diversity but the highest density of microcrustaceans. Similarity percentage (SIMPER) analysis identified the discriminator species among lakes where the domination of small-sized microcrustaceans was observed in lakes with high levels of eutrophication; the hypereutrophic Sembrong lake (Ceriodaphnia cornuta, 74.0%); the meso-eutrophic Putrajaya lake (Bosmina longirostris, 46.9%; C. cornuta, 19.4%). Chlorophyll a, total phosphorus and water transparency showed significant roles in the distribution of microcrustaceans. The canonical correspondence analysis (CCA) scores indicated that small-sized C. cornuta and B. longirostris were related to the eutrophic conditions of lakes. This study elucidated that the lake trophic status could be one of the main factors contributing to the community restructuring of microcrustaceans in tropical lakes.

APA, Harvard, Vancouver, ISO, and other styles

31

Fernando, C. H. "Impacts of Fish Introductions in Tropical Asia and America." Canadian Journal of Fisheries and Aquatic Sciences 48, S1 (December 19, 1991): 24–32. http://dx.doi.org/10.1139/f91-301.

Full text

Abstract:

Biotas are constantly being reshaped by invasions. Introduction is now an added route to invaders. Impacts must be viewed against the background of massive changes in type, extent and quality of freshwater habits globally and in that freshwater fishes are almost living fossils. Also, old lakes and lacustrine fishes are highly restricted geographically. Lakes are young while rivers are old. Riverine, marsh and pond fishes are not well adapted to lacustrine conditions now widespread due to reservoir construction. Some Clupeidae and Cichlidae are lacustrine-adapted and highly productive. They have therefore made major impacts on fish yields in lakes and reservoirs. In tropical Asia and America, there have been a series of overlapping waves offish introductions during the past 150 years, culminating tin the tilapias from Africa. These fishes now dominate capture and culture fisheries in many countries. Fish introductions are a fait accompli and will continue. They must be realistically assessed and carefully monitored. Contrary to some predictions, introductions have not caused severe damage to indigenous species except when piscivores were used. Yields of indigenous fishes have apparently been enhanced in some instances. Parasites pose a serious threat and only an effective quarantine will ensure their exclusion.

APA, Harvard, Vancouver, ISO, and other styles

32

Santos, Anderson Medeiros dos, and Sidinei Magela Thomaz. "Short term fluctuations and succession trends in tropical floodplain vegetation measured by correspondence analysis." Brazilian Archives of Biology and Technology 51, no. 4 (August 2008): 581–91. http://dx.doi.org/10.1590/s1516-89132008000400016.

Full text

Abstract:

The aim of this work was to study the aquatic macrophytes community development to distinguish the fluctuations from succession trends at different temporal and spatial scales in the Upper Paraná River floodplain. The samples were collected quarterly from May 2000 to March 2002 in seven lakes with different degrees of connectivity from the main river channel and analyzed by between-class correspondence analysis. It was difficult to establish any pattern of community development at local scale but at a higher level of organization, disconnected lakes were characterized by fluctuation of the floristic composition. Connected lakes showed a straight trajectory, indicating that succession was occurring at these sites. Probably the income of propagules and diaspores from the river into connected lakes was the driving force of the observed change in community composition.

APA, Harvard, Vancouver, ISO, and other styles

33

Rosa, Jonathan, Ramiro de Campos, Koen Martens, and Janet Higuti. "Spatial variation of ostracod (Crustacea, Ostracoda) egg banks in temporary lakes of a tropical flood plain." Marine and Freshwater Research 72, no. 1 (2021): 26. http://dx.doi.org/10.1071/mf19081.

Full text

Abstract:

Ostracods are microcrustaceans that produce resting eggs under adverse conditions. In this study we evaluated the spatial variation of ostracod resting eggs in different regions of temporary lakes in a Brazilian flood plain. Based on the homogenisation effect of flood pulses on aquatic communities in flood plains, we hypothesised that the composition and abundance of ostracod eggs in the centre of temporary lakes would be similar to those in edge regions. Samples were collected from the centre and edge regions of five temporary lakes. Sediment was oven dried, rehydrated and hatching was monitored in germinating chambers. Twelve ostracod species hatched from the egg banks during our experiments. The abundance and species composition were similar between the two regions of the lakes. Flood events may be responsible for the homogenisation of the egg banks as a result of the connection of lakes with principal river channels. During flooding, water masses powerfully enter lakes and can redistribute sediments. This study shows that egg banks have the potential to contribute to the maintenance of local biodiversity and the resilience of biodiversity of temporary lake ecosystems.

APA, Harvard, Vancouver, ISO, and other styles

34

Fu, Wang, and Scott Steinschneider. "A Diagnostic-Predictive Assessment of Winter Precipitation over the Laurentian Great Lakes: Effects of ENSO and Other Teleconnections." Journal of Hydrometeorology 20, no. 1 (January 1, 2019): 117–37. http://dx.doi.org/10.1175/jhm-d-18-0128.1.

Full text

Abstract:

Abstract This study examines the primary atmospheric controls over winter precipitation variability in the Great Lakes basin and the potential for seasonal prediction. We employ partial least squares (PLS) regression to identify the primary modes of joint variability between winter precipitation over each of the Great Lakes and concurrent anomalies in midlevel atmospheric flow. We find that the first identified pattern (PLS1) is related to El Niño–Southern Oscillation (ENSO), while the other patterns represent unique anomalies in atmospheric flow that govern precipitation gradients over the basin, with limited seasonal predictability. Nonlinearities are found in the relationship between a sea surface temperature (SST)-based index for ENSO and PLS1 with respect to the phase, strength, and type of ENSO event. An examination of the ENSO-related propagating wave train that drives variability of PLS1 precipitation reveals that seasonally lagged tropical Pacific convection, as measured by remotely sensed outgoing longwave radiation (OLR), is more strongly and linearly related to Great Lakes winter precipitation than SST-based ENSO indices. Cross-validated linear regressions based on October OLR signals explain 20%–32% of the out-of-sample precipitation variability in the Great Lakes basin. We conclude with a deeper assessment of the underlying relationship between patterns of OLR anomalies in the western equatorial Pacific and Great Lakes winter precipitation. Results show that precipitation response to El Niño is similar regardless of OLR intensity in the tropical Pacific, but for La Niña events, the precipitation response is stronger under weak tropical OLR anomalies. The potential for further improvements in ENSO-based seasonal forecasts are discussed.

APA, Harvard, Vancouver, ISO, and other styles

35

Lehmusluoto, Pasi, and Badruddin Mahbub. "Three tropical crater lakes in Bali (Indonesia): a reexamination of some lakes visited by the German Sunda Expedition in 1929." Archiv für Hydrobiologie 114, no. 4 (February 23, 1989): 537–53. http://dx.doi.org/10.1127/archiv-hydrobiol/114/1989/537.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Cuna, Estela, Javier Alcocer, Martha Gaytán, and Margarita Caballero. "Phytoplankton Biodiversity in Two Tropical, High Mountain Lakes in Central Mexico." Diversity 14, no. 1 (January 10, 2022): 42. http://dx.doi.org/10.3390/d14010042.

Full text

Abstract:

Lakes El Sol and La Luna, inside the crater of the Nevado de Toluca volcano, Central Mexico, are the only two perennial high mountain lakes [HML] in the country. HML are considered among the most comparable ecosystems worldwide. These lakes are “extreme” environments with diluted, oligotrophic, and cold waters exposed to high UV radiation doses. In this paper, we document the phytoplankton species inhabiting these two extreme tropical ecosystems. The phytoplankton diversity of Lakes El Sol and La Luna is low compared to the global phytoplankton diversity from other Mexican inland waters. Nonetheless, the phytoplankton diversity turned out to be high compared to other HML worldwide, both temperate and tropical. The phytoplankton community in Lake El Sol was formed by 92 morphospecies and in Lake La Luna by 63; in both, the most diverse groups were Bacillariophyceae and Chlorophyceae. All species found in Lake La Luna were present in Lake El Sol, but 29 species present in Lake El Sol were absent in Lake La Luna. Nevertheless, 57% of the most frequent and abundant taxa in Lake El Sol were rare in La Luna, and 47% of the most frequent and abundant taxa in Lake La Luna were rare in Lake El Sol. Associated with their shallowness and polymictic thermal pattern, 87.5% of the Bacillariophyceae morphospecies are tychoplantonic, while the remaining 12.5% are truly planktonic. Dominant taxa were Chlorophyceae in Lake El Sol and Cyanobacteria in Lake La Luna. The most extreme conditions of Lake La Luna (ultraoligotrophy, very low pH, high ultraviolet radiation) most likely explained the differences in the dominant species composition and lower species richness compared to Lake El Sol. Herein, we provide for the first time a taxonomic list of the phytoplankton community of Lakes El Sol and La Luna. This information constitutes a baseline needed to use these HML as sentinels of global and climate change.

APA, Harvard, Vancouver, ISO, and other styles

37

Lewis, William M. "Comparisons of phytoplankton biomass in temperate and tropical lakes." Limnology and Oceanography 35, no. 8 (December 1990): 1838–45. http://dx.doi.org/10.4319/lo.1990.35.8.1838.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Moi, Dieison A., Gustavo Q. Romero, Pablo A. P. Antiqueira, Roger P. Mormul, Franco Teixeira de Mello, and Claudia C. Bonecker. "Multitrophic richness enhances ecosystem multifunctionality of tropical shallow lakes." Functional Ecology 35, no. 4 (January 28, 2021): 942–54. http://dx.doi.org/10.1111/1365-2435.13758.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Soeprobowati, TR. "Paleolimnological approach for management sustainable use of tropical lakes." IOP Conference Series: Earth and Environmental Science 789, no. 1 (June 1, 2021): 012022. http://dx.doi.org/10.1088/1755-1315/789/1/012022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Sharip, Z., FM Yusoff, J. Jusoh, and A. Jamin. "Comparative limnology of natural and man-made tropical lakes." IOP Conference Series: Earth and Environmental Science 380 (December 23, 2019): 012019. http://dx.doi.org/10.1088/1755-1315/380/1/012019.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Chang, William Y. B. "Management of shallow tropical lakes using integrated lake farming." SIL Communications, 1953-1996 24, no. 1 (January 1994): 219–24. http://dx.doi.org/10.1080/05384680.1994.11904040.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

MacIsaac, Hugh J., Amanda P. Eyraud, Boris Beric, and Sara Ghabooli. "Can tropical macrophytes establish in the Laurentian Great Lakes?" Hydrobiologia 767, no. 1 (September 24, 2015): 165–74. http://dx.doi.org/10.1007/s10750-015-2491-y.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Lewis, William M. "Basis for the protection and management of tropical lakes." Lakes and Reservoirs: Research and Management 5, no. 1 (March 5, 2000): 35–48. http://dx.doi.org/10.1046/j.1440-1770.2000.00091.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Vargas-Sánchez, Mariana, Javier Alcocer, and Luis A. Oseguera. "Seston and eutrophication on a tropical karst lake district: Lagunas de Montebello, Chiapas, Mexico." Limnetica 41, no. 2 (June 15, 2022): 1. http://dx.doi.org/10.23818/limn.41.16.

Full text

Abstract:

Large quantities of seston are among the most important indicators of eutrophication in aquatic ecosystems. The present study aimed to elucidate the role seston plays in the general limnological dynamics of a cluster of eighteen tropical karstic lakes with different anthropic impacts (non-impacted, oligotrophic, clear-water lakes, and impacted, eutrophic, turbid-water lakes) of the “Lagunas de Montebello” National Park lake district. The seston concentration was measured twice, in the warm/rainy and the cold/dry season. Vertical profiles of temperature, dissolved oxygen, electrical conductivity, pH, and photosynthetic active radiation (PAR) were recorded at each lake. Water samples were taken along the water column to evaluate seston and chlorophyll a (Chl-a) concentration. Impacted lakes displayed higher seston (4.1-21.0 mg/L) and Chl-a (8.1-129.8 μg/L) concentrations, reduced euphotic zone (ZEU = 2.6-6.3 m), and superficial thermo- (gradient = 0.8 ± 0.2 °C/m) and oxyclines (gradient = 4.7 ± 2.4 mg DO/m). Non-impacted lakes had lower seston (1.0-2.1 mg/L) and Chl-a (0.4-5.2 μg/L) concentrations, wide ZEU (10.1-33.4 m), and deeper thermo- (gradient = 0.5 ± 0.1 °C/m) and oxyclines (gradient = 0.6 ± 0.4 mg DO/m). The changes reported in impacted lakes linked with the increase in the seston and Chl-a concentrations are most likely related to the eutrophication process asso¬ciated with anthropogenic activities (agriculture, urban development, land-use change) in the NW part of the area. This research highlights the fragility of the tropical karst lake ecosystems worth protecting to preserve the aquatic ecosystem’s health.

APA, Harvard, Vancouver, ISO, and other styles

45

Kalff, J., and Watson. "Phytoplankton and its dynamics in two tropical lakes: a tropical and temperate zone comparison." Hydrobiologia 138, no. 1 (August 1986): 161–76. http://dx.doi.org/10.1007/bf00027238.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Ahlgren, I., C. Chacón, R. García, I. Mairena, K. Rivas, and A. Zelaya. "Sediment microbial activity in temperate and tropical lakes, a comparison between Swedish and Nicaraguan lakes." SIL Proceedings, 1922-2010 26, no. 2 (December 1997): 429–34. http://dx.doi.org/10.1080/03680770.1995.11900749.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Alcocer, Javier, Luis A. Oseguera, Diana Ibarra-Morales, Elva Escobar, and Lucero García-Cid. "Responses of Benthic Macroinvertebrate Communities of Two Tropical, High-Mountain Lakes to Climate Change and Deacidification." Diversity 13, no. 6 (May 31, 2021): 243. http://dx.doi.org/10.3390/d13060243.

Full text

Abstract:

High-mountain lakes are among the most comparable ecosystems globally and recognized sentinels of global change. The present study pursued to identify how the benthic macroinvertebrates (BMI) communities of two tropical, high mountain lakes, El Sol and La Luna, Central Mexico, have been affected by global/regional environmental pressures. We compared the environmental characteristics and the BMI communities between 2000–2001 and 2017–2018. We identified three principal environmental changes (the air and water temperature increased, the lakes’ water level declined, and the pH augmented and became more variable), and four principal ecological changes in the BMI communities [a species richness reduction (7 to 4), a composition change, and a dominant species replacement all of them in Lake El Sol, a species richness increase (2 to 4) in Lake La Luna, and a drastic reduction in density (38% and 90%) and biomass (92%) in both lakes]. The air and water temperature increased 0.5 °C, and lakes water level declined 1.5 m, all suggesting an outcome of climate change. Contrarily to the expected acidification associated with acid precipitation, both lakes deacidified, and the annual pH fluctuation augmented. The causes of the deacidification and the deleterious impacts on the BMI communities remained to be identified.

APA, Harvard, Vancouver, ISO, and other styles

48

Pinho, L., C. M. Duarte, H. Marotta, and A. Enrich-Prast. "Temperature-dependence of the relationship between <i>p</i>CO<sub>2</sub> and dissolved organic carbon in lakes." Biogeosciences Discussions 12, no. 3 (February 6, 2015): 2787–808. http://dx.doi.org/10.5194/bgd-12-2787-2015.

Full text

Abstract:

Abstract. The relationship between the partial pressure of carbon dioxide (pCO2) and dissolved organic carbon (DOC) concentration in Brazilian lakes, encompassing 225 samples across a wide latitudinal range in the tropics, was tested. Unlike the positive relationship reported for lake waters, which was largely based on temperate lakes, we found no significant relationship for tropical and subtropical Brazilian lakes, despite very broad ranges in both pCO2 and DOC. Closer examination showed that the strength of pCO2 vs. DOC relationships declines with increasing water temperature, suggesting substantial differences in carbon cycling in warm lakes, which must be considered when upscaling limnetic carbon cycling to global scales.

APA, Harvard, Vancouver, ISO, and other styles

49

Kraus, Cleber, Marie-Paule Bonnet, Ina de Souza Nogueira, Maria Morais Pereira Souza Lobo, David da Motta Marques, Jérémie Garnier, and Ludgero Cardoso Galli Vieira. "Unraveling Flooding Dynamics and Nutrients’ Controls upon Phytoplankton Functional Dynamics in Amazonian Floodplain Lakes." Water 11, no. 1 (January 16, 2019): 154. http://dx.doi.org/10.3390/w11010154.

Full text

Abstract:

The processes in tropical floodplain lakes enable maintaining phytoplankton nutrient requirements over a hydrological year. The nutrients such as nitrogen, phosphorus and carbon compounds play an essential role in phytoplankton growth. However, the way that nutrients and phytoplankton interact and how this relationship varies seasonally in tropical freshwater ecosystems is not clear. In this study, we evaluate the relationship between phytoplankton–nutrients over the hydrological cycle in Amazonian floodplain lakes and verify if this relationship influences the biomass of cyanobacteria. We also check what factors linked to nutrients act in structuring phytoplankton community. Using the phytoplankton functional approach, we verified how their ability to respond to hydrological and environmental variations reflects the ecological conditions and investigated how these interactions work. The results show that the Amazonian floodplain lakes could maintain long-term nutrient enrichment status. The nutrients input conduces to cyanobacteria dominance, that allied to other factors, play an essential role in supporting the stability of the phytoplankton–nutrients relationship over the hydrological cycle.

APA, Harvard, Vancouver, ISO, and other styles

50

Quenta-Herrera, Estefania, Verónica Crespo-Pérez, Bryan G. Mark, Ana Lía Gonzales, and Aino Kulonen. "Mountain freshwater ecosystems and protected areas in the tropical Andes: insights and gaps for climate change adaptation." Environmental Conservation 49, no. 1 (December 2, 2021): 17–26. http://dx.doi.org/10.1017/s0376892921000382.

Full text

Abstract:

SummaryAlthough protected areas (PAs) play an important role in ecosystem conservation and climate change adaptation, no systematic information is available on PA protection of high-elevation freshwater ecosystems (e.g., lakes and watersheds with glaciers), their biodiversity and their ecosystem services in the tropical Andes. We therefore combined a literature review and map analysis of PAs of International Union for Conservation of Nature (IUCN) and national systems of PAs and freshwater ecosystems. We found that seven national parks were created for water resources protection but were not designed for freshwater conservation (i.e., larger watersheds). High-value biodiversity sites have not been protected, and new local PAs were created due to water resource needs. We quantified 31 Ramsar sites and observed that PAs cover 12% of lakes, 31% of glacial lakes and 12% of the total stream length in the tropical Andes. Additionally, 120 watersheds (average area 631 km2) with glaciers and 40% of the total glacier surface area were covered by PAs. Future research into the role of PAs in ecosystem services provision and more detailed freshwater inventories within and around PAs, especially for those dependent on glacier runoff, will fill key knowledge gaps for freshwater conservation and climate change adaptation in the tropical Andes.

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Tropical lakes'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles