Hydroperiod length, not pond age, determines zooplankton taxonomic and functional diversity in temporary ponds

Ecological Indicators, Journal Year: 2024, Volume and Issue: 159, P. 111632 - 111632

Published: Jan. 24, 2024

Mediterranean Temporary ponds (MTPs) are suffering severe alterations in their hydrological and salinity regime through global change, restoration or conservation of these habitats is a priority. However, there little information that can be used as scientific basis for restoration. We studied the taxonomic functional diversity zooplankton communities set 96 Doñana, Spain during four consecutive hydroperiods after creation. examined differences across alpha beta (and its turnover nestedness components) rotifer, cladoceran copepod community, well influence local environmental variables including proximity to natural wetlands. There was no general increase indices first two hydroperiods. found shorter significantly reduced diversity, but increased contribution turnover. Shorter also community complexity, with long-term effects. Conductivity most important predictor direction effects changed between The distance from source colonists, pond depth, were key early stage assembly perturbation. Our results suggest new projects MTPs should focus on increasing heterogeneity reducing vulnerability salinization. use approaches monitoring studies improve our understanding mechanisms processes affecting under dynamic regimes. This turn help us predict consequences management policies biodiversity MTPs.

Language: Английский

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Effects of seasonal hydrological regulation of cascade dams on the functional diversity of zooplankton: Implications for the management of massive reservoirs and dams

Journal of Hydrology, Journal Year: 2022, Volume and Issue: 610, P. 127825 - 127825

Published: April 13, 2022

Language: Английский

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Effects of climate, spatial and hydrological processes on shaping phytoplankton community structure and β-diversity in an estuary-ocean continuum (Amazon continental shelf, Brazil)

Journal of Sea Research, Journal Year: 2023, Volume and Issue: 193, P. 102384 - 102384

Published: May 6, 2023

This study investigated the influence of estuarine plume from Maranhense Gulf on phytoplankton community structure and β-diversity. To understand effects regulation mechanisms shaping β-diversity along an estuary-ocean continuum in eastern sector Amazon shelf, this considered spatiotemporal analyses physical, chemical, biological variables May 2019 to June 2020. High temporal environmental heterogeneity was identified Cumã Bay significant spatial variability continuum. Based thermohaline properties, observed alongshore at a distance approximately 60 km coastline. Both varied time space. From 189 taxa, thirty-nine indicator species were selected based their functional traits value. Skeletonema costatum best water influence. Turnover main component responsible for boosting scales. The present first performed which applied diversity metrics (β-diversity) generate new information about loss taxon richness provided important changes heterogeneity.

Language: Английский

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Microplastic pollution in sediments of tropical shallow lakes

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 855, P. 158671 - 158671

Published: Sept. 11, 2022

Language: Английский

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Deciphering the Patterns and Correlates of Zooplankton Functional Diversity in Mountain and Lowland Ponds

Freshwater Biology, Journal Year: 2025, Volume and Issue: 70(1)

Published: Jan. 1, 2025

ABSTRACT Biodiversity studies have usually been conducted considering only the taxonomic dimension of ecological communities. However, diversity measurements taking into account functional traits species may be more sensitive in capturing aspects community functioning that are not apparent with traditional approach. Functional (either based on alpha or beta levels) is, therefore, a facet provides link between ecosystem and structure an important metric for assessing impact global change context applied conservation schemes. Zooplankton is key element lentic ecosystems due to its linkage primary producers secondary consumers. Here, we tried disentangle spatial patterns correlates zooplankton along relatively wide altitudinal gradient (700–2100 m a.s.l.) across central northwestern Spain. We also identified environmental controls extensive set lowland (48) mountain (28) ponds sampled 2004–2005 2007–2008, respectively. assessed whether replacement richness differences drove overall evaluated relative contributions geographical distances variation diversity. Our findings highlighted importance filtering increasing elevation, leading potentially concomitant decrease values. was related changes patterns, which were mostly result pure loss gain both ponds. suggest eutrophication associated agricultural development main factor underlying homogenisation communities Local strongly dominant trait difference component than distances. This study supports prediction elevation fosters different functions. results local conditions determining architecture communities, physiologically extreme environments (mountains) areas suffering from pressures processes. fraction characterising relationships generally low. suggests prevalence idiosyncratic responses random stochastic events structuring composition freshwater

Language: Английский

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Modelling the alpha and beta diversity of copepods across tropical and subtropical Atlantic ecoregions

npj Biodiversity, Journal Year: 2025, Volume and Issue: 4(1)

Published: Jan. 31, 2025

Copepods, the most abundant individuals of mesozooplankton, play a pivotal role in marine food webs and carbon cycling. However, few studies have focused on their diversity environmental factors influencing it. The objective present study is to model alpha beta copepods across tropical subtropical ecoregions Atlantic Ocean using both taxonomic functional approaches. used dataset 226 copepod species collected by stratified plankton hauls (0-800 m depth) equatorial Atlantic, from oligotrophic waters close Brazilian coast more productive Mauritanian Upwelling. To perform analysis, six traits related behaviour, growth, reproduction were selected. Several diversities estimated metrics (SR, Δ+, Λ+) (FDis, FEve, FDiv, FOri, FSpe), modelized with GAM spatial gradients, day/night. overall two components β-diversity (turnover nestedness) shared between depth stations. surface layers stations oligotrophic, equatorial, Cape Verde displayed higher values α-diversity. More unpredictable facets α-diversity, although they showed tendency be positive during daytime. analysis revealed gradients as key modelling whereas was relevant for turnover component drove station, nestedness acquired relevance β-diversity. structure community varied spatially depths ecoregions, but this not linked changes same magnitude.

Language: Английский

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Experimental approach on the contribution of wind and animal vectors in the dispersal and colonization of testate amoebae (Protista, Amoebozoa) in freshwater ecosystems

Acta Limnologica Brasiliensia, Journal Year: 2025, Volume and Issue: 37

Published: Jan. 1, 2025

Abstract: Aim We aimed to understand how testaceous amoebae spread in new sites, assessing their dispersal potential by wind and animals freshwater ecosystems. Methods conducted a field experiment over 33 days between July August 2018. The study included four different approaches: (i) control group exposed exclusively wind, (ii) the addition of propagules dispersed Odonata (aquatic insects), (iii) amphibians, (iv) combined both animals. Results detected total 13 species testate amoebae. Regarding richness, we observed steady increase throughout experimental period. In terms abundance, similar trend was observed, with differences treatment all vectors combinated, when comparing treatments only combination alone, indicating possible progressive colonization these organisms aquatic environment. composition amoebae, did not detect significant within each period or experiment. Conclusions Our results demonstrate importance animal transport cysts.

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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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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Beta diversity of freshwater algal communities: influence of different dispersal mechanisms

Aquatic Sciences, Journal Year: 2024, Volume and Issue: 86(2)

Published: Jan. 11, 2024

Language: Английский

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