| Popis: |
Ecological consequence of sand mining is involved mainly three tier habitat (TTH) transformation/degradation, water quality deterioration (WQD) and species diversity of instream biota. Hence, TTH transformation/degradation across the channel bed to bank is detected by the applying of habitat suitable index (HSI) integrated with multiple logistic regression (MLR). In particularly, HSI model is find out the effect of sand mining on Koeleria macrantha species dominated along the bank margin while degradation of species suitability of Cynodondactylon dominated along the riparian sites. Moreover, habitat suitability alteration of aquatic plant species in miming and pits are assessed using of HSI. Results showed that most of the TTH alteration/degradation is occurred across the mining sites throughout the channel. Mining induced pits play key role to provide the sustainable viability for aquatic species after mining. ROC curve is employed to validate the all those results that are predicted by MLR in respective segment sites. Three dominant insitu species like Koeleria macrantha, Cynodon dactylon and Egeria spp., Eichernia Crassips as dominated in mining pit, are facing to more habitat degradation and its related problems along the lower and middle segments than upper segment. |
