Environmental drivers of α-diversity patterns in monsoonal tropical stream fish assemblages: a case study from tributaries of Narmada basin, India

Shukla, Rohitashva; Bhat, Anuradha

doi:10.1007/s10641-017-0601-6

Cited by 12 publications

(7 citation statements)

References 62 publications

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“…In terms of their fish fauna, our study revealed comparable overall richness and diversity across the two regions (with species richness of 71 and 69 for WB and MP, respectively). Saturating rarefaction curves indicated adequate sampling during the 3 years of the study, as also seen in similar studies in the Indian subcontinent [40], [45]. With around 70 species in both…”

Section: Diversity Patterns Within Eco-regionssupporting

confidence: 80%

“…regions, our study showed a reasonably high diversity of freshwater fishes for even lower order reaches, comparable with somewhat larger sized rivers across India [45], [58][59][60]. Despite being more than 1,200 km.…”

Section: Plos Onesupporting

confidence: 60%

“…These streams are characterized by rocky river beds with stream widths ranging from 50m-700m. They are regulated streams facing high anthropogenic pressure due to sand mining, unregulated water use and river bank agriculture [45]. The study sites in West Bengal are located approximately 1,200 km.…”

Section: Study Areamentioning

confidence: 99%

“…At each site, fishes were sampled along a 100 m stretch that incorporated the existing microhabitat characteristics within the stream reach [45]. Sampling was conducted for 1.5 to 2 hours at each site, based on previous studies at these sites that have shown saturation of accumulation curves with this effort [45]. Equal sampling effort was maintained across all sites in…”

Section: Site Selection and Data Collectionmentioning

confidence: 99%

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Temporal and environmental drivers of fish-community structure in tropical streams from two contrasting regions in India

Mondal

Bhat

2020

PLoS ONE

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Environmental and anthropogenic factors are known to drive fish community structure in aquatic systems across the world. This study investigates fish assemblages in lower order streams across contrasting landscapes in central and eastern India. We documented the species diversity of these monsoon driven lower order streams in the two regions. We also investigated the potential common environmental drivers of richness and diversity and effect of season in these tropical streams. The study was based on seasonal data on abundance of fishes and environmental parameters collected between 2015-2017 from streams in states of Madhya Pradesh and West Bengal. Species diversity were compared across regions and seasons, based on their richness (SR) as well as diversity (Shannon index H'). Drivers of overall richness and diversity were analyzed using multiple linear regression methods, based on best subset selection. Analysis of data revealed high diversity in these streams in both regions. Cyprinidae, Bagridae and Channidae were the most dominant families in both regions. Despite the geographical and local ecological differences across the regions, common environmental parameters were found to influence richness and diversity across the two regions, indicating these as being key drivers of fish community structure. Water flow was a common factor driving both richness and diversity across both regions. Our study revealed a lack of seasonal effect in structuring fish communities in tropical streams. With stream and river ecosystems facing increasing threats due to habitat alterations and water quality degradation in countries such as India, a clear understanding of regional and local drivers of community structure of aquatic fauna is crucial. These results on the role of common environmental factors across ecoregions provides baseline information for understanding their ecological roles and developing management plans for important river basins and fish conservation in future.

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Section: Diversity Patterns Within Eco-regionssupporting

confidence: 80%

Section: Plos Onesupporting

confidence: 60%

Section: Study Areamentioning

confidence: 99%

Section: Site Selection and Data Collectionmentioning

confidence: 99%

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Temporal and environmental drivers of fish-community structure in tropical streams from two contrasting regions in India

Mondal

Bhat

2020

PLoS ONE

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“…Human disturbances impact the spatial heterogeneity of fish species [15,22]. A previous study revealed that approximately half of the land use in the Guanzhong Plain was agriculture [64].…”

Section: Variation In Fish Species Composition and Distributionmentioning

confidence: 99%

Quantifying the Distribution and Diversity of Fish Species Along Elevational Gradients in the Weihe River Basin, Northwest China

et al. 2019

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In this study, species compositions, distributions, and diversity patterns of fish assemblages were investigated at 50 sampling sites in the Weihe River and its two largest tributaries, the Jinghe River and the Beiluo River, under high- and low-flow conditions in 2017. For every condition tested and in the all rivers tested, Cyprinidae was the richest family, containing 17 of the 39 identified fish species. Carassius auratus was the most common species, accounting for 11.3% of the total individuals. Nonmetric multidimensional scaling (NMDS), analysis of similarities (ANOSIM), and similarity percentage analysis (SIMPER) revealed that fish species composition differed significantly among rivers (p < 0.05), with dissimilar species assemblages found in the different rivers. Variation was influenced by a combined effect of habitat conditions, environmental factors, and human impact. Canonical correspondence analysis (CCA) identified variables explaining the variation in fish species (p < 0.05), and elevation contributed the most under both flow conditions. Alpha diversity decreased with increasing elevation within rivers as a result of changing environmental conditions, especially for wetted width. Alpha and beta diversities of rivers increased with increasing drainage area, which is related to habitat heterogeneity. The decrease in alpha diversity and the increase in beta diversity with increasing elevation can be explained by variations in habitat and geographic features.

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Comprehensive River Health Assessment System for Indian Rivers: A Case Study of Central Indian River Narmada

Gurjar,

Vyas

2024

Rivers of India

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Environmental drivers of α-diversity patterns in monsoonal tropical stream fish assemblages: a case study from tributaries of Narmada basin, India

Cited by 12 publications

References 62 publications

Temporal and environmental drivers of fish-community structure in tropical streams from two contrasting regions in India

Temporal and environmental drivers of fish-community structure in tropical streams from two contrasting regions in India

Quantifying the Distribution and Diversity of Fish Species Along Elevational Gradients in the Weihe River Basin, Northwest China

Comprehensive River Health Assessment System for Indian Rivers: A Case Study of Central Indian River Narmada

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