Do riffle and pool fish assemblages respond differently to longitudinal position along a subtropical stream network?

Lampert, Vinicius Renner; Dala‐Corte, Renato Bolson; Artioli, Luiz Guilherme Schultz; Fialho, Clarice Bernhardt

doi:10.1127/fal/2018/1186

Cited by 5 publications

(4 citation statements)

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“…In these systems, central and more connected sites tend to show similar assemblages via mass effect [13,15,16] compared to distant and less connected ones. Overall, headwaters streams located in up-stream portions of a given catchment are less connected sites and therefore tend to receive fewer colonists from the central pool of species and thus show lower species richness [12,15,16]. Furthermore, at the basin scale, drainage boundaries may also constrain the dispersal of organisms, resulting in spatial structure of metacommunity [17,18].…”

Section: Introductionmentioning

confidence: 96%

“…Stream and riverine ecosystems are dendritic networks [13] in which the dispersal of strictly aquatic organisms is restricted to the river branches [14]. In these systems, central and more connected sites tend to show similar assemblages via mass effect [13,15,16] compared to distant and less connected ones. Overall, headwaters streams located in up-stream portions of a given catchment are less connected sites and therefore tend to receive fewer colonists from the central pool of species and thus show lower species richness [12,15,16].…”

Section: Introductionmentioning

confidence: 99%

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Stream fish metacommunity organisation across a Neotropical ecoregion: The role of environment, anthropogenic impact and dispersal-based processes

et al. 2020

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Understanding how assemblages are structured in space and the factors promoting their distributions is one of the main goals in Ecology, however, studies regarding the distribution of organisms at larger scales remain biased towards terrestrial groups. We attempt to understand if the structure of stream fish metacommunities across a Neotropical ecoregion (Upper Paraná-drainage area of 820,000 km 2) are affected by environmental variables, describing natural environmental gradient, anthropogenic impacts and spatial predictors. For this, we obtained 586 sampling points of fish assemblages in the ecoregion and data on environmental and spatial predictors that potentially affect fish assemblages. We calculated the local beta diversity (Local Contribution to Beta Diversity, LCBD) and alpha diversity from the species list, to be used as response variables in the partial regression models, while the anthropogenic impacts, environmental gradient and spatial factors were used as predictors. We found a high total beta diversity for the ecoregion (0.41) where the greatest values for each site sampled were located at the edges of the ecoregion, while richer communities were found more centrally. All sets of predictors explained the LCBD and alpha diversity, but the most important was dispersal variables, followed by the natural environmental gradient and anthropogenic impact. However, we found an increase in the models' prediction power through the shared effect. Results suggest that environmental filters (i.e. environmental variables such as climate, hydrology and anthropogenic impact) and dispersal limitation together shape fish assemblages of the Upper Paraná ecoregion, showing the importance of using multiple sets of predictors to understand the processes structuring biodiversity distribution.

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Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Stream fish metacommunity organisation across a Neotropical ecoregion: The role of environment, anthropogenic impact and dispersal-based processes

et al. 2020

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“…In river systems (Brown & Swan, 2010), the dispersal of strictly aquatic organisms (i.e. fish) is limited by tributaries (branches) and main channels (mainstems) (Heino, Melo, et al, 2015; Heino, Nokela, et al, 2015), and the position of these sites is key in the metacommunity dynamics of these systems (Lampert et al, 2018). Headwater streams are, in general, less connected to other sites (Henriques‐Silva et al, 2019), and therefore tend to receive fewer settlers from the central pool of species present in a river basin (Henriques‐Silva et al, 2019; Stegmann et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Metacommunity organisation of Amazonian stream fish assemblages: The importance of spatial and environmental factors

Martins,

Bastos,

Sousa

et al. 2023

Ecology of Freshwater Fish

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Metacommunity theory seeks to explain how local and regional processes contribute to the organisation of biological communities. Recent conceptual frameworks of this theory indicate that the dynamics of populations and communities are jointly established by dispersal, species responses to environmental conditions and biotic interactions dependent on species density. Here, we use hierarchical joint species distribution modelling to verify the effects of environmental factors (at multiple spatial scales), drainage network configuration, spatial autocorrelation and interspecific interactions on the structure of fish assemblages in terra‐firme streams in the Eastern Brazilian Amazon. Thirty streams were sampled in two field surveys, and 89 species were collected in total. Our results confirm the effects of limited dispersal, environmental conditions (at multiple scales) and the configuration of the drainage network on the dynamics of these assemblages. Furthermore, our results suggest that interspecific interactions are less relevant for the structuring of fish metacommunities in small Amazonian headwater streams. Abiotic factors like drainage networks and environmental heterogeneity were better predictors of species distributions than co‐occurrence patterns with potential competitors or predators.

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“…Watercourse distance is an important predictor to assess connectivity between fish communities (Landeiro et al 2011, Schmera et al 2017. Environmental characteristics, such as pH, dissolved oxygen concentration, and streambed substrate types (i.e., gravel, sand, or clay), may determine which species can establish in the streams depending on their specific ecological requirements , Troia & Gido 2015, Lampert et al 2018. These predictors are commonly associated with an environmental filtering mechanism that selects a set of fish species capable of establishing in streams (Teresa et al 2016, Cunha et al 2019.…”

Section: Introductionmentioning

confidence: 99%

Environmental and Spatial Factors Are Poor Predictors of Fish Beta Diversity in Cerrado Streams

Oliveira,

Bini,

Lima

et al. 2023

Oecol. Aust.

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Beta diversity, the spatial or temporal variation in community structure, is a central theme in community ecology. In this study, we evaluated the explanatory power of environmental and spatial variables in predicting fish beta diversity. Using data from Cerrado streams, we first partitioned fish beta diversity into three components using both presence-absence (total, turnover, and nestedness) and abundance data (total, balanced changes in abundance, and abundance gradients). Then, we evaluated the individual influences of environmental and spatial variables on each of these components. Our results showed that environmental and spatial variables explained significant fractions of variation in fish beta diversity. However, most of the variation in total beta diversity and its components remained unexplained. Considering presence-absence data, significant fractions were obtained only for total beta diversity. For this type of data, spatial variables were more important than environmental variables. Abundance-based analyses showed that both total beta diversity and its components (balanced changes in abundance and abundance gradients) were explained by environmental and spatial variables. With abundance data, environmental and spatial variables were similarly related to total beta diversity and balanced changes in abundance, while spatial variables were the sole predictors of the abundance gradients. Despite methodological and theoretical advances in beta diversity studies, we still need to seek relevant environmental, spatial, temporal, and biological data that explain beta diversity patterns in streams.

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Do riffle and pool fish assemblages respond differently to longitudinal position along a subtropical stream network?

Cited by 5 publications

References 0 publications

Stream fish metacommunity organisation across a Neotropical ecoregion: The role of environment, anthropogenic impact and dispersal-based processes

Stream fish metacommunity organisation across a Neotropical ecoregion: The role of environment, anthropogenic impact and dispersal-based processes

Metacommunity organisation of Amazonian stream fish assemblages: The importance of spatial and environmental factors

Environmental and Spatial Factors Are Poor Predictors of Fish Beta Diversity in Cerrado Streams

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