Relationships between multiple biological groups and classification schemes in a Neotropical floodplain

Padial, André Andrian; Siqueira, Tadeu; Heino, Jani; Vieira, Ludgero Cardoso Galli; Bonecker, Cláudia Cósta; Lansac‐Tôha, Fábio Amodêo; Rodrigues, Luzia Cleide; Takeda, Alice Michiyo; Train, Sueli; Velho, Luiz Felipe Machado; Bini, Luis Maurício

doi:10.1016/j.ecolind.2011.05.007

Cited by 31 publications

(33 citation statements)

References 26 publications

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“…We found high environmental variability during each of the four sampling periods, indicating that environmental gradients were broad enough to potentially generate community concordance (see Table S2 and Padial et al, 2012). All environmental variables except for pH were log (x)-transformed prior to the analyses described below.…”

Section: Data Collectionmentioning

confidence: 99%

Evidence against the use of surrogates for biomonitoring of Neotropical floodplains

Padial¹,

Declerck²,

Meester³

et al. 2012

Freshwater Biology

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Summary 1. Community concordance measures the level of association between the compositional patterns shown by two groups of organisms. If strong community concordance occurs, one group could be used as a surrogate for another in conservation planning and biodiversity monitoring. In this study, we evaluated the variability in the strength of community concordance, the likely mechanisms underlying community concordance and the degree to which one community can predict another in a set of Neotropical floodplain lakes (Upper Paraná River floodplain, Brazil). 2. We used a data set including six aquatic communities: fish, macrophytes, benthic macroinvertebrates, zooplankton, phytoplankton and periphyton. We used Mantel and PROTEST approaches to evaluate the levels of community concordance in up to four sampling periods. Also, we used partial Mantel test and information about biotic interactions to investigate reasons for observed patterns of concordance. Finally, we used co‐correspondence analysis to evaluate the performance of one taxonomic group in predicting the structures of other communities. 3. The levels of community concordance varied over time for almost all cross‐taxa comparisons. Concordance between phytoplankton and periphyton probably resulted from similar responses to environmental gradients, whereas other patterns of concordance were likely generated by interactions among groups. However, the levels of predictability were low, and no particular taxonomic group significantly predicted all other groups. 4. The low and temporally variable levels of community concordance cast doubts on the use of surrogate groups for biodiversity management in Neotropical floodplains.

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Section: Data Collectionmentioning

confidence: 99%

Evidence against the use of surrogates for biomonitoring of Neotropical floodplains

Padial¹,

Declerck²,

Meester³

et al. 2012

Freshwater Biology

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“…Backwaters ("ressacos") are lentic water bodies connected to river originating from recently abandoned channels formed by sidebars . Thus, floodplains can often be formed by set of habitats associated with a main river channel of a hydrological basin which may be referred to as subsystems (Thomaz et al, 2004;Padial et al, 2012) or even as sub-basin as we follow in this study.…”

Section: Study Areamentioning

confidence: 99%

The variability in the hydrosedimentological regime supports high phytoplankton diversity in floodplain: a 12-year survey of the Upper Paraná River

2017

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The alpha, beta, and gamma diversity are important tools for conservation studies, and the distribution of species in space and time is essential to provide insights regarding diversity patterns and processes that modify the ecosystem and the community responses to such changes. Thus, a long-term ecological date was used to evaluate in 12 biotopes the phytoplankton composition and diversity within selected habitats (alpha diversity), between habitats (beta diversity) and across the upper Paraná River floodplain (gamma diversity). We evaluate the environmental variability of the hydrosedimentological cycles (limnophase and potamophase) during 12 years, associated with the water level variability and with the environmental heterogeneity as drivers of the phytoplankton composition and diversity in the upper Paraná River floodplain. Remarkable gamma diversity was recorded especially in limnophase, however, years with intense flood presented high gamma diversity, and years with extreme drought presented low gamma diversity, although without significant differences. The alpha diversity was significantly different on spatial and temporal scales. The beta diversity showed high values, however with low temporal variability and without correlation with the hydrosedimentological regime of the Paraná River. Overall, these results indicate that the variability in the hydrosedimentological regime associated with the periodicity, duration, and amplitude of limnophase and potamophase, and the pattern of mosaic of habitats in this floodplain are essential for sustaining much of the phytoplankton diversity and ecosystem integrity, and that this approach is relevant and proved be useful to understand floodplain systems and associated phytoplankton community.

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“…Floodplains are highly complex including lotic and lentic systems that are intermittently connected (Fantin‐Cruz, Loverde‐Oliveira, Bonecker, Girad, & Motta‐Marque, ; Thomaz, Pagioro, Bini, Roberto, & Rocha, ) by the hydrologic variability of the flood pulse substantially altering the physical, chemical and biological characteristics of the water (Junk et al., ; Padial et al., ). The flood pulse is the major force controlling biota in river floodplains, maintaining a dynamic equilibrium (Bino, Wassens, Kingsford, Thomas, & Spencer, ; Conceição et al., ; Junk et al., ).…”

Section: Discussionmentioning

confidence: 99%

Damming interacts with the flood pulse to alter zooplankton communities in an Amazonian river

et al. 2019

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Flow modification of lotic ecosystems is one of the main threats to global freshwater biodiversity. Commonly, and in the river studied here, modification results from hydroelectric dam installation. We evaluated the impacts of damming on zooplankton communities in the Amazonian floodplain of the Madeira River (Porto Velho, Rondônia, Brazil) following construction in 2012 of the run‐of‐river dam of Jirau Hydroelectric Power Plant. Using data sampled between 2009 and 2015, we tested for discontinuities in zooplankton community composition attributable to damming and the naturally occurring flood pulse. The flood pulse remained the main predictor explaining variation in zooplankton community structure even with the installation of the dam on the Madeira River. Despite this, discontinuities for the entire zooplankton community and for the main compositional groups (testate amoebae, rotifers, cladocerans, and copepods) were detected in relation to the dam (pre‐/post‐dam periods), mainly in ebb and low water, and with weaker evidence of dam effects during flood and highwater hydrological periods. A multivariate regression tree explained 9.6% of the variation in zooplankton communities and identified four groups: (1) flood and high‐water periods; (2) low water post‐dam; (3) low water pre‐dam; and (4) ebb hydrological periods. The deviance in each multivariate regression tree node was attributable to variation in eight rotifer, three testate amoeba, and three copepod taxa. Our study demonstrates that the flood pulse, dam construction, and interaction between both of these factors affect zooplankton community structure in the Madeira River. While for many zooplankton community variables, effects occurred mainly during ebb and low‐water periods, some effects were also observed during high water and flood periods. We thus recommend the establishment of a permanent environmental monitoring programme during all hydrological periods in tropical floodplain rivers and the addition of sampling sites downstream from dams. Many rivers in the world are increasingly disrupted by multiple dams, yet little is known of their effects, especially for run‐of‐river dams. Our study identified short‐term impacts of only one run‐of‐river dam on zooplankton communities. More research is needed on the effects of multiple run‐of‐river dams on zooplankton and other biota, especially in tropical floodplain rivers, so that negative effects can be understood and ameliorated.

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Relationships between multiple biological groups and classification schemes in a Neotropical floodplain

Cited by 31 publications

References 26 publications

Evidence against the use of surrogates for biomonitoring of Neotropical floodplains

Evidence against the use of surrogates for biomonitoring of Neotropical floodplains

The variability in the hydrosedimentological regime supports high phytoplankton diversity in floodplain: a 12-year survey of the Upper Paraná River

Damming interacts with the flood pulse to alter zooplankton communities in an Amazonian river

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