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When Nature Decides who Stays and who Goes:Priority effects Extirpating the Non-Native Brown Trout Salmo Trutta fario L. Population from a Himalayan River


Affiliations
1 No. 18 Chandrabani, Wildlife Institute of India, Dehradun 248 001, India
2 Aquatic Biodiversity Unit, Department of Zoology and Biotechnology, Hemwati Nandan Bahuguna Garhwal University, Srinagar 249 161, India
3 Department of Zoology, Panjab University, Chandigarh 160 014, India
 

Climate-induced stochastic events bring forth idiosyncratic changes in habitat and community assemblage patterns of an area. Nature governs its priorities in such incidents, where native taxa are preferred over the invasive ‘late-comers’, thus leading to extirpation of the latter, according to the concept of ‘priority effects’1. This stronghold of nature strictly comes into play when an ecosystem is least altered from its natural state. River Asiganga in Uttarakhand, India was chosen as a case study to understand this theory, where cloudburst-induced flash floods are considered to be a reason for the complete wipe-out of non-native brown trout (Salmo trutta fario), leaving behind the native snow trout (Schizothorax species).
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  • When Nature Decides who Stays and who Goes:Priority effects Extirpating the Non-Native Brown Trout Salmo Trutta fario L. Population from a Himalayan River

Abstract Views: 411  |  PDF Views: 130

Authors

Aashna Sharma
No. 18 Chandrabani, Wildlife Institute of India, Dehradun 248 001, India
Vineet Kumar Dubey
No. 18 Chandrabani, Wildlife Institute of India, Dehradun 248 001, India
Prakash Nautiyal
Aquatic Biodiversity Unit, Department of Zoology and Biotechnology, Hemwati Nandan Bahuguna Garhwal University, Srinagar 249 161, India
Jeyaraj Antony Johnson
No. 18 Chandrabani, Wildlife Institute of India, Dehradun 248 001, India
Yogesh Kumar Rawal
Department of Zoology, Panjab University, Chandigarh 160 014, India
Kuppusamy Sivakumar
No. 18 Chandrabani, Wildlife Institute of India, Dehradun 248 001, India

Abstract


Climate-induced stochastic events bring forth idiosyncratic changes in habitat and community assemblage patterns of an area. Nature governs its priorities in such incidents, where native taxa are preferred over the invasive ‘late-comers’, thus leading to extirpation of the latter, according to the concept of ‘priority effects’1. This stronghold of nature strictly comes into play when an ecosystem is least altered from its natural state. River Asiganga in Uttarakhand, India was chosen as a case study to understand this theory, where cloudburst-induced flash floods are considered to be a reason for the complete wipe-out of non-native brown trout (Salmo trutta fario), leaving behind the native snow trout (Schizothorax species).

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DOI: https://doi.org/10.18520/cs%2Fv117%2Fi2%2F186-187