Influence of Ecological Factors on the Patterns of Fish Species Richness in Tropical Indian Rivers

Das, M. K.; Naskar, Malay; Mondal, Mohammad L.; Srivastava, Pankaj Kumar; Dey, Sumanta; Rej, A.

doi:10.3750/aip2011.42.1.06

Cited by 26 publications

(18 citation statements)

References 45 publications

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“…: 11,16–18] may favor a better description of the natural stochasticity of environmental conditions in streams. Better designs for environmental conditions measurement may account for environmental heterogeneity of the stream system, which is recognized a long time [19–21], but frequently neglected. Environmental heterogeneity can have important effects on biological diversity [22,23], suggesting that variation of in-stream conditions is a more important predictor of fish species diversity [e.g.…”

Section: Introductionmentioning

confidence: 99%

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Partitioning Among Niche and Neutral Explanations for Metacommunity Patterns in Cerrado Stream Fish Communities

Lcn

Casatti

et al. 2020

Preprint

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The Species Sorting concept, one of the models developed to explain patterns in metacommunity structure, suggests that relationships between biological communities and environmental conditions is the basic means of the species selection processes. A second concept is neutral theory, and the idea of neutral dynamics underpinning metacommunity structure, cannot be overlooked. The third mechanism is the Mass Effect concept, that focuses on the interaction between environmental condition and neutral effects. In the present study, we partitioned fish communities in streams between niche and neutral theory concepts, identifying the best representation of metacommunity structure, and assessed if linear and hydrographic distance were equivalent in the representation of neutral processes. The result points to the importance of species sorting mechanisms in structuring fish communities with neutral processes best represented by the linear distances. On the other hand, the best representation of species’ niches was achieved with average values and variance of the local conditions.

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Section: Introductionmentioning

confidence: 99%

“…Environmental heterogeneity can have important effects on biological diversity [22,23], suggesting that variation of in-stream conditions is a more important predictor of fish species diversity [e.g. : 19–21], and others aquatics communities than average values [e.g. : 24,25].…”

Section: Introductionmentioning

confidence: 99%

Partitioning Among Niche and Neutral Explanations for Metacommunity Patterns in Cerrado Stream Fish Communities

Lcn

Casatti

et al. 2020

Preprint

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“…The migratory routes of fish can be blocked by these hydraulic structures (Godinho & Kynard, ; Williams, Armstrong, Katopodis, Larinier, & Travade, ), and remediation strategies such as fish passages (Laborde et al, ; Link et al, ) are commonly employed in such circumstances. The impacts of habitat heterogeneity to fish habitats and stocks are well known, given that the flow regime strongly influences the swimming behavior (Das et al, ). Consequently, understanding the behavioural response of fish to diverse hydraulic conditions is essential to fish passage design and restoration of migratory routes; thus, the topic has drawn significant research attention.…”

Section: Introductionmentioning

confidence: 99%

Swimming behavior of crucian carp in an open channel with sudden expansion

Zha

Huang

Chen

2019

River Research & Apps

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The sudden-expansion effect created by natural and man-made structures such as unsubmerged boulders, spur dikes, and culvert structures is common in open channels. Migratory fishes may use the heterogeneous flow generated by sudden expansion to their benefit, to select habitats for balancing energy expenditure or for maximizing predation opportunities. This study explores the swimming behavior of three size classes of crucian carp in response to hydrodynamic characteristics in an experimental open channel with sudden expansion. The flow field was characterized using particle image velocimetry (PIV) measurements and featured a recirculation zone in the vicinity of the expansion. Based on the classification of the swimming trajectory, four specific swimming behaviours (SSBs) were utilized by crucian carp during migration. With increasing flow velocity, fish spent more time in the recirculation zone. Residence time in the recirculation zone was inversely correlated with fish body length. Due to the advantage in providing shelter from challenging heterogeneous hydraulic conditions, the recirculation zone was preferred by crucian carp, especially the smaller ones, indicating the importance of energy conservation in habitat occupation. These findings confirm that the recirculation zone generated by sudden expansion may be beneficial to the upstream passage of fish and in habitat restoration. KEYWORDS drag force, flow field, migratory fish, residence time, specific swimming behaviours, suddenexpansion effect

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“…It is well established that the natural flow regime of a river is a key determinant of ecological integrity and that frequent derivations of flows can be detrimental to biotic communities and even affect the structure of the river ecosystem [18]. The hydro ecological analysis to identify potential differences in the benthic community before and after impact provides valuable information for the provision of biologically derived environmental flows [19][20] and an essential input of hydrodynamic habitat models to facilitate scenario selection of optimal environmental flow to ensure the integrity of aquatic ecosystems downstream from anthropogenic activities that cause hydrological alterations [21][22][23]. Peru, is a country with a strategic location for continental water resources, has 71% of tropical glaciers in South America, 25% of aquatic ecosystems in the Amazon region and their basins represent 5% of sweet water of the world [23].…”

Section: Introductionmentioning

confidence: 99%

Quality of the aquatic environment of high Andean rivers evaluated through environmental indicators: a case of the Cunas River, Peru

Custodio

Chávez²

2019

Ingeniare. Rev. chil. ing.

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Influence of Ecological Factors on the Patterns of Fish Species Richness in Tropical Indian Rivers

Cited by 26 publications

References 45 publications

Partitioning Among Niche and Neutral Explanations for Metacommunity Patterns in Cerrado Stream Fish Communities

Partitioning Among Niche and Neutral Explanations for Metacommunity Patterns in Cerrado Stream Fish Communities

Swimming behavior of crucian carp in an open channel with sudden expansion

Quality of the aquatic environment of high Andean rivers evaluated through environmental indicators: a case of the Cunas River, Peru

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