Hydrological connectivity determining metacommunity structure of planktonic heterotrophic flagellates

Lansac‐Tôha, Fernando Miranda; Meira, Bianca Ramos; Segóvia, Bianca Trevizan; Velho, Luiz Felipe Machado

doi:10.1007/s10750-016-2824-5

Cited by 41 publications

(21 citation statements)

References 59 publications

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“…In high water periods, the connectivity between environments increases, enhancing the exchange of sediment, minerals, substrates and organisms between different habitats (Thomaz, Bini, & Bozelli, 2007). In periods of low water, habitats are isolated from each other and from the main river channel and b-diversity increases over time (Bozelli, Thomaz, Padial, Lopes, & Bini, 2015;Lansac-Toha, Meira, Segovia, Lansac-Toha, & Velho, 2016).…”

Section: Introductionmentioning

confidence: 99%

Plankton metacommunities in floodplain wetlands under contrasting hydrological conditions

et al. 2018

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Species diversity is affected by processes operating at multiple spatial scales, although the most relevant scales that contribute to compositional variation and the temporal shifts of the involved mechanisms remain poorly explored. We studied spatial patterns of phytoplankton, rotifers and microcrustacean diversity across scales in a river floodplain system of the Danube in Austria under contrasting hydrological conditions (post‐flood versus low water level).The species turnover between water sections (β2) and between wetlands (β3) was the major components of regional diversity for all studied groups, with species turnover between habitats (β1) as a minor contributor. β1 diversity and β2 diversity were lower than expected by chance in most cases, suggesting that communities are more homogeneous than expected at these scales. β3 diversity was higher than expected by chance in many cases, indicating more distinct communities at the wetland level. Patterns were highly similar under different hydrological conditions, indicating no major immediate effect of flood events.Local environmental and spatial factors were similarly important in structuring phytoplankton, rotifer and microcrustacean communities in both hydrological conditions. Relevant environmental factors were spatially structured in post‐flood conditions especially between sections, suggesting flood‐driven homogenisation within the wetlands. Under low water level, spatial structuring of environment decreased and pure environmental factors gained relevance for phytoplankton and rotifers.Our results suggest that although β2 diversity between water sections is a major component of regional diversity, long‐term spatial processes responding to connectivity across the wetland structure phytoplankton, rotifer and microcrustacean communities. Aquatic sections within the limited spatial extent of the remaining floodplain areas appear more homogeneous than expected probably due to flood recurrence over the years.These results highlight that adequate planning of restoration and conservation strategies of floodplain wetlands should consider environmental heterogeneity together with long‐term spatial processes.

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Section: Introductionmentioning

confidence: 99%

Plankton metacommunities in floodplain wetlands under contrasting hydrological conditions

et al. 2018

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“…A high degree of commonality between northern and southern polar communities was demonstrated by next‐generation sequencing (Kleinteich et al, ; Wolf, Kilias, & Metfies, ). Sufficient evidence exists to support the leading role of environmental selection and climatic conditions in particular in structuring flagellate (Lansac‐Tôha, Meira, Segovia, Lansac‐Tôha, & Velho, ) and other microbe communities (Aguilar & Lado, ; Baldwin et al, ; Bates et al, ).…”

Section: Discussionmentioning

confidence: 99%

Does size really matter in biogeography? Patterns and drivers of global distribution of marine micro‐ and meiofauna

Azovsky

Chertoprud

Garlitska

et al. 2020

Journal of Biogeography

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Aim:This study aims to evaluate the role of various factors in structuring biogeographical distribution of small-sized organisms. More specifically, we analysed the distribution of three groups of marine benthic organisms differing in body size, both unicellular and metazoans, to assess the relevance of geographical and environmental factors on their taxonomic composition. Location: Global.Taxon: Heterotrophic flagellates, Ciliophora, Harpacticoida (Copepoda). Methods:The set of predictors included species richness (a proxy for sampling effort), geographical distance, isolation by geographical or hydrological barriers and three environmental variables (sea surface temperature, its annual variation and salinity). Multiple regression on the distance matrices and null modelling were used to quantify the relative effects of these variables in taxonomic similarity among 21 regions of the Ocean.Results: Each group showed a unique biogeographical pattern. The smallest-sized organisms, the flagellates, had high regional but low global diversity and low endemicity and demonstrated worldwide, environmentally driven distribution without any dispersal limitation (only the effects of climatic variables, but neither distance nor isolation effects, were significant). Thus, flagellates basically meet the 'ubiquity model' of global distribution. The ciliates showed a moderate level of endemicity, and their distribution depended on both spatial distance and the climatic variables, in accord with the 'moderate endemicity model'. In contrast, harpacticoids demonstrated high endemicity level, and their distribution was mostly geographically driven, indicating the considerable role of dispersal limitation-the pattern typical of other multicellular taxa with 'classical biogeography'. Species richness significantly influenced the interregional similarity of each group and explained 26%-65% of the total variance, indicating the strong impact of undersampling on faunistic similarity estimations. Main conclusions:Our results support the hypothesis that body size is the 'master trait' that shapes global biogeographical patterns towards higher predictability and increasing role of dispersal limitation for larger organisms. | 1181 AZOVSKY et Al.

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“…Common in freshwater environments, but has also been recorded in salty to hyper-saline environments (see Lee et al, 2005). In Brazil, it was recorded in plankton samples in the State of Rio de Janeiro (Cunha, 1913); in marine benthic samples from the State of Rio de Janeiro (Larsen and Patterson, 1990); in samples of bromeliads of rocky shores of the Paraná River, State of Paraná (Duarte et al, 2013); and in samples of plankton in lagoons of the upper Paraná River floodplain, State of Mato Grosso do Sul (Lansac-Toha et al, 2016). •Ancyromonadida Cavalier -Smith, 1998[= Phanomonadida Cavalier-Smith, 2008 Ancyromonas sigmoides Kent, 1880 ( Figure 18) Al-Qassab et al, 2002, p. 138, figs.…”

Section: •••••Eubodonida Vickeman Inmentioning

confidence: 98%

Heterotrophic flagellates (Amorpha and Diaphoretiches) in phytotelmata bromeliad (Bromeliaceae)

et al. 2020

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Many plants may accumulate rainwater, forming phytotelmata, aquatic microhabitats inhabited by various organisms. The aim of this study was to conduct an inventory of heterotrophic flagellates associated with phytotelmata of the bromeliad Aechmea distichantha Lem., found in rocky cliffs on the Upper Paraná River. The bromeliads were removed manually from the rocky wall, the water was removed and cultures of organisms of each plant were mounted in Petri dishes. Sixteen species of heterotrophic flagellate were recorded, drawn and described, among them one species belonging to the Amorpha Domain and 15 species to the Diaphoretiches Domain. The groups with most species were Euglenida and Kinetoplastea. The low diversity of heterotrophic flagellates recorded in this study, compared to the plankton of lakes and reservoirs, is probably related to the fact that phytotelmata are habitats with extreme environmental conditions, thus selecting organisms tolerant to these environments.

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Hydrological connectivity determining metacommunity structure of planktonic heterotrophic flagellates

Cited by 41 publications

References 59 publications

Plankton metacommunities in floodplain wetlands under contrasting hydrological conditions

Plankton metacommunities in floodplain wetlands under contrasting hydrological conditions

Does size really matter in biogeography? Patterns and drivers of global distribution of marine micro‐ and meiofauna

Heterotrophic flagellates (Amorpha and Diaphoretiches) in phytotelmata bromeliad (Bromeliaceae)

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