Geomorphology Of Chota Nagpur Plateau Pdf Download 2021

The present work aims to understand the existing distribution patterns of L. camara under different agro-climatic conditions in the Chotanagpur plateau and to understand its response to climate change by 2050 under different climatic Representative Concentration Pathway (RCP) scenarios, i.e., 2.6, 4.5, 6.0 and 8.5. This study aims to provide an in-depth analysis on existing distribution pattern and identification of identification of potential distribution sites prone to invasion risk of L. camara, and prioritization of areas for treatment in Jharkhand, a major part of Chotanagpur plateau in eastern India. This would lead to early detection of infestation status and management strategies to curtail the spread of L. camara in advance. The western part of Jharkhand comprising Betla National Park is a tiger reserve and many important forest species with immense medicinal properties existing in this part, and thus it has significant socio-economic aspects.

The potential risk zone vulnerable to L. camara in Jharkhand, Chotanagpur plateau was modelled using Maxent ver 3.3.3k (Phillips et al. 2020) with input samples (.csv files of occurrence of L. camara) for 425 sample locations. The Jackknife test was employed, to estimate the most contributing predictor variable to best fit the model. To evaluate model accuracy, the area under the Receiver Operating Characteristic (ROC) Curve (AUC) was estimated using test data in Maxent. The model was iterated 10 times to assess the threshold, while the random sample test percentage was set to 30 (Fig. 2).

Our findings endorsed the effectiveness of Maxent in projecting potentially suitable habitat sites of L. camara. Areas predicted by the model are in consonance with L. camara distribution (Divakar et al. 2013; Ray and Ray 2014). The present study suggests an increasing invasion of L. camara to new areas (Vardien et al. 2012) but in contrasts to the finding of Goncalves et al. (2014). A possible explanation for this might be the varied study area size; since our study was restricted to Chotanagpur plateau eastern India, whereas Goncalves et al. (2014) had considered a global perspective.

This study set out to assess the potential distribution areas of L. camara invasion in Jharkhand, a major part of Chotanagpur plateau region in the eastern India, for the years 2020 and 2050 under climate change scenarios. The study highlighted a wide distribution of L. camara across different landscapes of Jharkhand. The distribution of L. camara not only retains the existing area but shall also expand across the entire Jharkhand encompassing agro-climatic sub-zones IV, V and VI under future projections (2050). The investigation showed inability of L. camara to penetrate through the intact native virgin forests, in contrast to its abundant distribution along agricultural land and in open and disturbed forest areas including wide distribution in Betla National Park. The presence of L. camara in forest areas poses a great threat to native forest species and wildlife habitat in Chotanagpur plateau region as it restricts the regeneration and extension of natives. Another major finding of the study suggests urgent interventions to curtail its further expansion to support a better environment for the tigers in Betla National Park as well as reverse the ecosystem imbalance due to rapid invasion and removal of native species. We recommend prioritisation of sensitive natural sites at the verge of greater invasion threat and adoption of native tree and grass based intervention models to address invasion issues, support richer biodiversity and environmental amelioration and outreach programs to educate people with the harmful effects of L. camara and other similar invasive species. 2b1af7f3a8