Indicator environmental variables in regulating the distribution patterns of small freshwater fish Amblypharyngodon mola in India and Bangladesh

The key challenge in the fields of conservation and resource management is to track local, regional and global species extinctions and preserve biodiversity through optimization of investment of funds. To fulfil that purpose modelling and mapping habitat suitability of species is becoming essential....

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Autores principales: Sangeeta Roy, Santanu Ray, Surjya Kumar Saikia
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Publicado: Elsevier 2021
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spelling oai:doaj.org-article:8dcd7720df3a40bfa67e45b394e73e4d2021-12-01T04:28:47ZIndicator environmental variables in regulating the distribution patterns of small freshwater fish Amblypharyngodon mola in India and Bangladesh1470-160X10.1016/j.ecolind.2020.106906https://doaj.org/article/8dcd7720df3a40bfa67e45b394e73e4d2021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20308451https://doaj.org/toc/1470-160XThe key challenge in the fields of conservation and resource management is to track local, regional and global species extinctions and preserve biodiversity through optimization of investment of funds. To fulfil that purpose modelling and mapping habitat suitability of species is becoming essential. The freshwater ecosystem is today one of the most threatened ecosystems and fishes are especially vulnerable for climate change as they have fewer choices for dispersal. The altered thermal regimes, land use and hydrology together cause isolation, fragmentation and changes in distributional patterns of fish. In such landlocked situation, there is utmost need to identify suitable environmental conditions for a species to exist. Indigenous fish is one of the essential components of healthy inland aquatic ecosystems as they fulfil several important ecological functions and form an important part of the aquatic food web. Amblypharyngodon mola is an economically and ecologically important indigenous freshwater fish species of the tropical and subtropical floodplain rivers and wetland habitats of India and Bangladesh. However, lack of knowledge about the key environmental indicators is hindering appropriate management and conservation initiation. Modelling and mapping the distribution of A. mola was done for identifying the key environmental variables and predicting the potential distribution area of the species in current climatic condition. The species occurrence data were accessed from both primary and secondary sources and used after cleaning and removing biasness. Climatic, topographic, landcover and soil variables of 1 km resolution were used as environmental predictors. India and Bangladesh together were used as model background. Ensemble species distribution modelling was done, and the model was validated by area under the curve (AUC) value (>0.7). The result showed that the Ganges delta of lower reach going through West Bengal and Bangladesh is most suitable for A. mola occurrence. Annual upstream precipitation (hydroclim_12), soil pH in water (soil_average_02) and elevation (ele_01) are the key indicators for predicting the habitats suggesting the importance of hydroclimatic, topographic and soil variables in determining the distribution of the fish.Sangeeta RoySantanu RaySurjya Kumar SaikiaElsevierarticleFreshwater ecosystemSnapping toleranceEnsemble species distribution modellingPotential distributionEcologyQH540-549.5ENEcological Indicators, Vol 120, Iss , Pp 106906- (2021)
institution DOAJ
collection DOAJ
language EN
topic Freshwater ecosystem
Snapping tolerance
Ensemble species distribution modelling
Potential distribution
Ecology
QH540-549.5
spellingShingle Freshwater ecosystem
Snapping tolerance
Ensemble species distribution modelling
Potential distribution
Ecology
QH540-549.5
Sangeeta Roy
Santanu Ray
Surjya Kumar Saikia
Indicator environmental variables in regulating the distribution patterns of small freshwater fish Amblypharyngodon mola in India and Bangladesh
description The key challenge in the fields of conservation and resource management is to track local, regional and global species extinctions and preserve biodiversity through optimization of investment of funds. To fulfil that purpose modelling and mapping habitat suitability of species is becoming essential. The freshwater ecosystem is today one of the most threatened ecosystems and fishes are especially vulnerable for climate change as they have fewer choices for dispersal. The altered thermal regimes, land use and hydrology together cause isolation, fragmentation and changes in distributional patterns of fish. In such landlocked situation, there is utmost need to identify suitable environmental conditions for a species to exist. Indigenous fish is one of the essential components of healthy inland aquatic ecosystems as they fulfil several important ecological functions and form an important part of the aquatic food web. Amblypharyngodon mola is an economically and ecologically important indigenous freshwater fish species of the tropical and subtropical floodplain rivers and wetland habitats of India and Bangladesh. However, lack of knowledge about the key environmental indicators is hindering appropriate management and conservation initiation. Modelling and mapping the distribution of A. mola was done for identifying the key environmental variables and predicting the potential distribution area of the species in current climatic condition. The species occurrence data were accessed from both primary and secondary sources and used after cleaning and removing biasness. Climatic, topographic, landcover and soil variables of 1 km resolution were used as environmental predictors. India and Bangladesh together were used as model background. Ensemble species distribution modelling was done, and the model was validated by area under the curve (AUC) value (>0.7). The result showed that the Ganges delta of lower reach going through West Bengal and Bangladesh is most suitable for A. mola occurrence. Annual upstream precipitation (hydroclim_12), soil pH in water (soil_average_02) and elevation (ele_01) are the key indicators for predicting the habitats suggesting the importance of hydroclimatic, topographic and soil variables in determining the distribution of the fish.
format article
author Sangeeta Roy
Santanu Ray
Surjya Kumar Saikia
author_facet Sangeeta Roy
Santanu Ray
Surjya Kumar Saikia
author_sort Sangeeta Roy
title Indicator environmental variables in regulating the distribution patterns of small freshwater fish Amblypharyngodon mola in India and Bangladesh
title_short Indicator environmental variables in regulating the distribution patterns of small freshwater fish Amblypharyngodon mola in India and Bangladesh
title_full Indicator environmental variables in regulating the distribution patterns of small freshwater fish Amblypharyngodon mola in India and Bangladesh
title_fullStr Indicator environmental variables in regulating the distribution patterns of small freshwater fish Amblypharyngodon mola in India and Bangladesh
title_full_unstemmed Indicator environmental variables in regulating the distribution patterns of small freshwater fish Amblypharyngodon mola in India and Bangladesh
title_sort indicator environmental variables in regulating the distribution patterns of small freshwater fish amblypharyngodon mola in india and bangladesh
publisher Elsevier
publishDate 2021
url https://doaj.org/article/8dcd7720df3a40bfa67e45b394e73e4d
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AT santanuray indicatorenvironmentalvariablesinregulatingthedistributionpatternsofsmallfreshwaterfishamblypharyngodonmolainindiaandbangladesh
AT surjyakumarsaikia indicatorenvironmentalvariablesinregulatingthedistributionpatternsofsmallfreshwaterfishamblypharyngodonmolainindiaandbangladesh
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