Impact of instream sand mining on habitat destruction or transformation using coupling models of HSI and MLR
| Autor: | Nilanjana Das Chatterjee, Kousik Das, Raj Kumar Bhattacharya |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Sand mining
Hydrology geography River ecosystem geography.geographical_feature_category biology Geography Planning and Development biology.organism_classification Computer Science Applications Habitat destruction Habitat Artificial Intelligence Environmental science Dominance (ecology) Koeleria macrantha Computers in Earth Sciences Channel (geography) Riparian zone |
| Zdroj: | Spatial Information Research. 28:67-85 |
| ISSN: | 2366-3294 2366-3286 |
| DOI: | 10.1007/s41324-019-00271-3 |
| Popis: | Several human activities like sand mining, dam construction have intensive effect on river ecosystem. Instream sand mining is one of them to hindrance on riverine biota. Hence, an attempt is made in this study to assess three tier habitat degradation or alteration caused by instream sand mining from channel bed to riparian and bank site in upper, middle and lower segments of Kangsabati River. Habitat Suitability Index (HSI) is applied to detect geo referenced ecological information on two different condition i.e. habitat suitability of two dominating species of Koeleria macrantha and Cynodon dactylon (pre mining) and degraded or altered habitat incorporated with mining responses (post mining). HSI prepared five different suitable class taken seven dominating variables i.e. river channel, sandchar, riparian zone, slope, elevation, dry and moist sand layer using multiple logistic regressions (MLR) under GIS platform. MLR denotes sandchar deposition, elevation as significant variables of Koeleriamacrantha dominance along the bank while moist sand layer, riparian zone signified on Cynodondactylon dominance across the riparian site. HSI indicates low-suitable class of Koeleriamacrantha and Cynodondactylon dominated in largest sand mining area as lower (82%, 86%), middle (58%, 89%) and upper segment (77%, 78%) whereas largest mining area under two dominant species reaches low-suitable class as lower (79%, 58%), middle (89%, 82%) and upper segment (92%, 70%) respectively. In spite of variables influence on species dominance, massive sand mining leads to destroy the habitat suitability. Therefore, in situ habitat suitability of dominant species either degraded or altered throughout the channel. |
| Databáze: | OpenAIRE |
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