Discrimination of hydrologic variations for spatial distribution of fish assemblage in a large subtropical temperate river

Espínola, Luis A.; Abrial, Elie; Rabuffetti, Ana Pía; Simões, Nadson Ressyé; Amsler, Mario L.; Blettler, Martín César María; Eurich, Maria F.; Paira, Aldo R.

doi:10.1002/eco.2163

Cited by 6 publications

(11 citation statements)

References 55 publications

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“…These changes associated with hydrology and channel material components have been widely studied by Amsler et al (2005), Pereira (2016), Ramonell et al (2000), Ramonell (2021), and Sobrero et al (2014). The area of a water body is a classical hydrological parameter used in flood hazard studies and in delimitating an area vulnerable to a given event (Cheng et al, 2021; Espínola et al, 2020), showing the absolute value of the flooded area. In general terms, the larger the area covered by water, the more dangerous the flood event is.…”

Section: Discussionmentioning

confidence: 99%

“…However, they can be relatively similar over large floodplain areas. For example, an overflow level of 4.5 m and an isolation level of 2.3 m (according to the Santa Fe gauging station) were estimated for a large portion of the South section of the MPR (Abrial et al, 2021; Espínola et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

“…(2021), and Sobrero et al (2014). The area of a water body is a classical hydrological parameter used in flood hazard studies and in delimitating an area vulnerable to a given event (Cheng et al, 2021;Espínola et al, 2020), showing the absolute value of the flooded area.…”

Section: River Reach Citymentioning

confidence: 99%

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Fractal characteristics of the middle reach of the Paraná River floodplain during extreme hydrological events

Espínola,

Yoya,

Sklar

et al. 2023

River Research & Apps

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The hydrological events that occur on floodplains are largely defined by precipitation and runoff inputs interacting with their geomorphological characteristics. In the middle Paraná River (MPR), hydrological events have traditionally been studied using water level time series and topographic charts or satellite images of certain floodplain sectors, using the same scale throughout the study area. Different zones of the floodplain were integrated using fractal dimension (FD) to better understand hydrological processes. FD is a useful tool used to characterize the geomorphological complexity of river networks in watersheds. The box‐counting method was applied in the MPR floodplain. The result showed that as water levels increase, FD decreases, thereby indicating the direct relation with the hydrological attributes of the floodplain (e.g., duration, magnitude, recurrence of the flood event, and connectivity). This relation constitutes the basis of a new approach of the analysis of hydrological events and their effect on the MPR floodplain. This research provides fundamental information obtained from two hydrological stages and different spatial scales which may complement the method designed to accurately understand the hydrogeomorphological processes that operate on the Paraná River floodplain. It provides a simple parameter that can be used to evaluate the role that each floodplain section plays in attenuating the hydrograph recorded at each gauge analyzed along the river. This information will be useful in the implementation of management policies directed to the mitigation of future hydrological threats generated by alterations in the hydrological regime due to hydroclimatic variations or watershed alterations. The results further strengthen the basis for integrated sustainable planning of the main channel of the Paraná River, its floodplain, and the resources provided by this ecosystem.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Fractal characteristics of the middle reach of the Paraná River floodplain during extreme hydrological events

Espínola,

Yoya,

Sklar

et al. 2023

River Research & Apps

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“…However, these high‐flow event relationships are also dependent on the scale of observations. Espínola et al (2020) found flooding increased the spatial variability of fish assemblages at the reach scale.…”

Section: Discussionmentioning

confidence: 99%

Increased landscape disturbance and streamflow variability threaten fish biodiversity in the Red River catchment, USA

Mollenhauer

Mouser

Roland

et al. 2022

Diversity and Distributions

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Aim Stream fish distributions are hypothesized to be strongly associated with landscape characteristics at multiple scales. Variation in flow regimes and intensity of landscape disturbance are associated with stream fish distributions; however, relationships are poorly understood in many high‐diversity regions. Our objective was to identify occurrence relationships between fish distributions and streamflow and landscape characteristics in the south‐central United States. Location Our study area was the central Red River catchment in Oklahoma, Texas and Arkansas, USA. Methods We used existing fish surveys to model the occurrence of a diverse, warmwater assemblage among hydraulic response units (HRUs). We used multispecies occupancy modelling to identify variation in occurrence probability among 111 stream fishes in relation to landscape disturbance and flow regime characteristics. Results We found occurrence relationships with landscape disturbance and 11 metrics comprising all flow‐regime components. The relationships varied within both major species groups and some genera. Frequency and duration were the most common metrics underlying flow regime relationships. More common stream fishes tended to be positively associated with higher levels of landscape disturbance and flow regime metrics representing variability; conversely, narrow‐ranged fishes tended to be negatively associated. Occurrence relationships with flow metrics representing high‐flow events were predominately negative. As expected, many species were strongly associated with ecoregion with landscape disturbance and flow relationships held constant. Main conclusions Our study informs land use and water management decisions and stream fish conservation at multiple spatial scales. Collectively, the findings suggest potential homogenization of the Red River fish assemblage with increased landscape disturbance and streamflow variability. A reduction in landscape disturbance and maintenance of natural flow patterns at coarser scales may benefit endemic and narrow‐ranged fishes. Our findings also help guide finer‐scale land use and water management decisions by identifying stream network areas with a high occurrence probability of less tolerant fishes.

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“…Maintaining the ecological integrity and connectivity of dam-free river basins is crucial for minimizing the expected trend of biotic homogenization (Marques et al, 2018), especially across floodplains that depend on high flow pulses to increase the spatial variability and recruitment of fish assemblages (Cruz et al, 2020;Espínola et al, 2020). Pristine river basins can contribute significantly to the conservation of fish diversity in areas already impacted by dams (Marques et al, 2018;Silva et al, 2017Silva et al, , 2019Vasconcelos et al, 2021) or by several other human activities (Garcia et al, 2021).…”

Section: Future Perspectives and Conclusionmentioning

confidence: 99%

Spatial distribution patterns and predictors of fish beta‐diversity in a large dam‐free tributary from a Neotropical floodplain

et al. 2021

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Understanding how and why fish species composition varies between locations through beta-diversity has received increased interest recently. The physical structure, extension and environmental characteristics along the river basins influence the dispersal of organisms, which ultimately affects metacommunity dynamics and biodiversity patterns. Here, we aimed to identify major breaks delimiting fish assemblages in a large dam-free river basin on its main channel, which is almost pristine in hidrology, and to evaluate the influence of geo-climatic variables in the observed beta-diversity patterns. We used the statistical techniques Species Composition Interpolation (SCI) and Generalized Dissimilarity Modeling (GDM) to analyse betadiversity patterns based on georeferenced fish records from the Ivaí River basin. Ichthyofauna units were delimited, estimating the association between geo-climatic predictors and beta-diversity. We identified three major breaks delimiting fish assemblages in the Ivaí River basin (i.e. the upper, middle and lower sections). The fish communities were very distinct at the upper and lower sections, while the middle section was recovered as less differentiated. Turnover was the main component contributing to total beta-diversity, and dissimilarity in fish species composition was moderately associated with geo-climatic variables. Fish communities from the Ivaí River basin must be associated with niche-based processes, and we hypothesize that dispersal processes can be equally significant at the basin scale. The investigations may produce insights on strategies for conservation and restoration of degraded rivers, contributing to the long-term maintenance of fish communities and to the delimitation of new strategic areas for the effective conservation of freshwater biodiversity.

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Discrimination of hydrologic variations for spatial distribution of fish assemblage in a large subtropical temperate river

Cited by 6 publications

References 55 publications

Fractal characteristics of the middle reach of the Paraná River floodplain during extreme hydrological events

Fractal characteristics of the middle reach of the Paraná River floodplain during extreme hydrological events

Increased landscape disturbance and streamflow variability threaten fish biodiversity in the Red River catchment, USA

Spatial distribution patterns and predictors of fish beta‐diversity in a large dam‐free tributary from a Neotropical floodplain

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