The effect of cyanobacterial blooms on bio- and functional diversity of zooplankton communities

Biodiversity and Conservation, Journal Year: 2019, Volume and Issue: 28(7), P. 1815 - 1835

Published: April 10, 2019

Global biodiversity decline is believed to be caused by high anthropopressure. Particularly vulnerable habitats are freshwater ecosystems, which hotspots of biodiversity. The threat these ecosystems cyanobacterial blooms, tend proliferate in the face climate changes. Cyanobacteria development and dominance affect whole food web, especially zooplankton community. We used three classical indexes (species richness, Simpson’s Diversity Index Shannon Index) functional diversity (functional evenness divergence) study impact bloom on was conducted water bodies with a different period duration (short-lasting blooms vs. long-lasting blooms) order determine proliferated aquatic ecosystems. Use allowed for identifying changes that can overlooked indexes. conclude involves modifications trait space studied communities and, consequence, functioning

Language: Английский

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How planktonic microcrustaceans respond to environment and affect ecosystem: a functional trait perspective

International aquatic research., Journal Year: 2019, Volume and Issue: 11(3), P. 207 - 223

Published: July 17, 2019

Functional traits are ecologically relevant characteristics of species. They to community structuring in face environmental drivers (response traits) and ecosystem processes (effect traits). For planktonic microcrustaceans, the link between functional their responses or effects is not always clear. Our objective was review literature on linking for cladocerans copepods. Response discussed four categories: morphological, life history, behavioral, physiological. Temperature, predation, resources, stressors important morphological life-history traits. Body size, a trait, probably most because it responds several correlated with physiological zooplankton impact ecosystems functions. In an perspective, energy primary producers secondary consumers. trophic webs, may control phytoplankton biomass productivity, consequences whole lakes. Its influence carbon, nitrogen, phosphorus cycles expected increase body size. Other be important, but there lack information. We point out need more trait research, especially freshwater copepods neglected tropical better understanding natural systems, integrative approach multiple functions necessary.

Language: Английский

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Towards a synthesis of the biodiversity of freshwater Protozoa, Rotifera, Cladocera, and Copepoda in Brazil

Limnologica, Journal Year: 2022, Volume and Issue: 100, P. 126008 - 126008

Published: Aug. 4, 2022

Language: Английский

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Functional shifts in lake zooplankton communities with hypereutrophication

Freshwater Biology, Journal Year: 2019, Volume and Issue: 64(3), P. 608 - 616

Published: Jan. 17, 2019

Abstract Functional variation among consumer communities can alter ecosystem nutrient cycling. These impacts on function be specifically driven by interspecific in stoichiometric traits; thus, functional trait‐based approaches used to explain the processes controlling stoichiometry. However, eutrophication may reduce importance of consumers ecosystems eliminating heterogeneity recycling taxa. To test whether zooplankton diversity, i.e. aspects trait space occupied communities, varies over gradients trophic state and stoichiometry, we examined taxonomic 130 lakes agriculturally dominated Iowa ( U.S.A. ) 7 years. Stoichiometric dispersion decreased with index, supporting abundance shift hypothesis that hypereutrophic are characterised different combinations traits than their less eutrophic counterparts. Zooplankton became increasingly N‐rich relative P as TSI increased. Specifically, P‐poor Bosmina , Chydorus cyclopoid copepods increased eutrophication. distributions eutrophication, which implies unique functioning could due part inhabiting them. As N:P while lake total nitrogen phosphorus ratio state, taxa exacerbate excess availability these systems differentially at higher rates.

Language: Английский

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Influence of cyanobacterial blooms and environmental variation on zooplankton and eukaryotic phytoplankton in a large, shallow, eutrophic lake in China

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 773, P. 145421 - 145421

Published: Jan. 26, 2021

Language: Английский

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A review of 121 years of studies on the freshwater zooplankton of Brazil

Limnologica, Journal Year: 2023, Volume and Issue: 100, P. 126057 - 126057

Published: Jan. 9, 2023

Language: Английский

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Sediment drying-rewetting cycles enhance greenhouse gas emissions, nutrient and trace element release, and promote water cytogenotoxicity

PLoS ONE, Journal Year: 2020, Volume and Issue: 15(4), P. e0231082 - e0231082

Published: April 2, 2020

Increased periods of prolonged droughts followed by severe precipitation events are expected throughout South America due to climate change. Freshwater sediments especially sensitive these changing conditions. The increased oscillation water levels in aquatic ecosystems causes enhanced cycles sediment drying and rewetting. Here we experimentally evaluate the effects induced drought a rewetting event on release carbon dioxide (CO2), methane (CH4), nutrients (nitrogen phosphorus), trace elements (iron, manganese, zinc) from tropical reservoir southeastern Brazil. Furthermore, used bulb onions (Allium cepa) assess potential cytogenotoxicity overlying after We found peaks CO2 CH4 emissions when first transitioned wet dry, with fluxes declining as dried out. peaked again upon rewetting, whereas remained unaltered. Our experiment also revealed average increases up factor ~5000 rates These potentially toxic compounds likely explain lower replication Allium cepa cells (up 22% reduction) exposed findings suggest that may lead range changes freshwater ecosystems, including nutrient enrichment, toxicity following resuspension contaminants, higher emission greenhouse gases atmosphere.

Language: Английский

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Effect of eutrophication on the functional diversity of zooplankton in shallow ponds in Northeast Brazil

Journal of Plankton Research, Journal Year: 2021, Volume and Issue: 43(6), P. 894 - 907

Published: Sept. 8, 2021

Abstract Eutrophication is a process characterized by the enrichment of given aquatic environment with nutrients, triggering serious and growing ecological problem in continental ecosystems, including effects on biodiversity ecosystem functioning. For this, we predicted that eutrophication decreases zooplankton functional richness, evenness, divergence dispersion, changes composition zooplankton. Zooplankton water features were sampled sixteen shallow ponds northeastern Brazil. Functional diversity aspects calculated for each assembly (rotifers, cladocerans, copepods) using multidimensional indexes groups. Principal component analysis, multiple linear regression, hierarchical cluster analysis distance-based redundancy performed to characterize environmental variation, identify associations diversity. We observed turbidity increased nutrients influenced indices due pollution. Eutrophic environments favored more specialized species, greater selectivity food capture ability escape predators. suggest eutrophic conditions lead assemblies decreasing differentiation variability traits. Such loss processes make these ecosystems vulnerable.

Language: Английский

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Deep lakes support higher zooplankton functional diversity than shallow lakes: A case study in lacustrine environments affected by mining tailings (lower Doce River basin, Brazil)

Freshwater Biology, Journal Year: 2024, Volume and Issue: 69(7), P. 945 - 958

Published: May 23, 2024

Abstract Tragic incidents involving mine tailings spills have impacted many aquatic ecosystems around the world. The massive dam collapse of Fundão, which occurred in Brazil 2015, affected several ecosystems, including shallow and deep lakes lower Doce River basin. Until now, effects on functional diversity zooplankton remain poorly understood. We investigated (functional groups, richness [FRic] evenness [FEve]) lakes, exploring influence environmental variables metals. In addition, trends redundancy vulnerability were also assessed to understand patterns resilience mining‐impacted ecosystems. Surveys performed monthly three by failure, from October 2018 September 2019. community was dominated smaller filter‐feeders omnivorous species, associated with cyanobacteria density chlorophyll‐ a . Medium‐sized filters iron, suspended particulate organic matter total carbon lakes. trophic groups had higher contribution increasing than medium‐sized both FRic FEve Shallow highly vulnerable species loss modulated changes metal pollution. Tropical mining should receive particular attention conservation plans, as consequence their high level pollutant retention comparison we highlight importance using approach better ecosystem resulting impacts environments.

Language: Английский

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Zooplankton functional group responses to environmental drivers off the west coast of Vancouver Island, Canada

Progress In Oceanography, Journal Year: 2020, Volume and Issue: 190, P. 102482 - 102482

Published: Nov. 21, 2020

Language: Английский

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