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

Biodiversity and Conservation, Год журнала: 2019, Номер 28(7), С. 1815 - 1835

Опубликована: Апрель 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

Язык: Английский

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

International aquatic research., Год журнала: 2019, Номер 11(3), С. 207 - 223

Опубликована: Июль 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.

Язык: Английский

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

Limnologica, Год журнала: 2022, Номер 100, С. 126008 - 126008

Опубликована: Авг. 4, 2022

Язык: Английский

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Functional shifts in lake zooplankton communities with hypereutrophication

Freshwater Biology, Год журнала: 2019, Номер 64(3), С. 608 - 616

Опубликована: Янв. 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.

Язык: 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, Год журнала: 2021, Номер 773, С. 145421 - 145421

Опубликована: Янв. 26, 2021

Язык: Английский

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

Limnologica, Год журнала: 2023, Номер 100, С. 126057 - 126057

Опубликована: Янв. 9, 2023

Язык: Английский

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

PLoS ONE, Год журнала: 2020, Номер 15(4), С. e0231082 - e0231082

Опубликована: Апрель 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.

Язык: Английский

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

Journal of Plankton Research, Год журнала: 2021, Номер 43(6), С. 894 - 907

Опубликована: Сен. 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.

Язык: 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, Год журнала: 2024, Номер 69(7), С. 945 - 958

Опубликована: Май 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.

Язык: Английский

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Spatial and seasonal dynamics of zooplankton functional groups and their relationship with environmental factors in urban rivers in Haikou City, China

Limnologica, Год журнала: 2024, Номер 108, С. 126200 - 126200

Опубликована: Авг. 27, 2024

Язык: Английский

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