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Tidal Morphology and Environmental Consequences of Rasulpur River in the Era of Anthropocene
Published in Balai Chandra Das, Sandipan Ghosh, Aznarul Islam, Suvendu Roy, Anthropogeomorphology of Bhagirathi-Hooghly River System in India, 2020
Pravat Kumar Shit, Gouri Sankar Bhunia, Manojit Bhattacharya, Avijit Kar, Bidhan Chandra Patra
Natural morphological structure of river was partially amended as embankment barricades with respect to regular tidal flow of rivers (Prandle and Lane, 2015). Therefore, the rapid changing of population expansion and succeeding proliferation of resource exploitation destabilise the ecological stability of the natural ecosystem (Mitra, 1984). This fast changing aspect is exercising persistent ecological imprint, wherein stability between management and exploitation has been endangered recurrently (Milligan et al., 2009). Local inhabitants transfigure the creeks into numerous freshwater ponds for their daily usage along with little irrigation tenacities (Yennawar and Tudu, 2014). The marginal people of this region are dependents on the agriculture and fishing practices to a greater extent (Sen et al., 2017). Consequently, the agricultural lands were converted into pisciculture by consenting saline water via creeks into the cultivated fields (Endo et al., 2011). This alteration creates the paddy field saline in one side and alternatively reformed the natural flow of creeks. Such variation in long run distressed the symmetry of rivers, as creeks are the imperative element of estuarine geomorphology and BioNetwork. Present investigations provide recommendation for future improving the planning and management supports of river course to sustain the underlying anthropogenic process with considering the ecosystem values and the needs of the users. This study also figures out the threatened indigenous freshwater fish species, and their natural habitat leads to an in-depth analysis of the actual reasons for threatening of fish species related to the changes in LULC patterns.
Dynamic prediction and impact factors analysis of ecological risk in Chinese farming-pastoral ecotone
Published in Human and Ecological Risk Assessment: An International Journal, 2023
Jixuan Yan, Guang Li, Guangping Qi, Xiangdong Yao, Hongqiang Qiao, Miao Song, Pengcheng Gao, Caixia Huang, Jie Li, Qihong Da
The process of dynamic prediction and impact factors analysis of ecological risk based on LUCC is complex. This paper uses Moran’ I index, CA-Markov and BRT model to discuss the spatial and temporal dynamic changes characteristics and impact factors of ecological risk from 2000 to 2040. The research results are showed below: LUCC is significant, especially the bareland region changes the most, reaching a minimum value of 54000 km2 in 2020. It is mainly transferred out to grassland and farmland, and the urban continues to increase, resulting in unreasonable changes in the LUCC structure.During the study period, the overall ecological risk, the highest ecological risk region and the higher ecological risk region all increased first and then decreased. The range of highest ecological risk increased by 0.65 times from 2000 to 2020 and decreased by 1.78 times from 2020 to 2040, indicating that the ecological environment will be improved in the future. The lower ecological risk region tends to increase, while the middle ecological risk region and the lowest ecological risk region remain basically unchanged. These regions show significant spatial and temporal correlation and high spatial aggregation.The topographical conditions, meteorological change and socioeconomic factors have certain impacts on the stability of CFPE ecosystem. Elevation (24.4%) is the most important factor affecting landscape ecological risk, followed by temperature (19.1%), precipitation (15.7%), slope (13.6%) and GDP (8.4%). Elevation has the greatest impact, mainly because the highest ecological risk regions are mainly located in "interference of human activities in low elevation" and "change of natural environment in high elevation" regions. In addition, climate warming and environmental change have caused reduced surface runoff, drying of marshes, shrinking of lakes and worsening of grassland desertification, leading to deterioration of ecological stability. Therefore, in combination with the characteristics of highest ecological risk occurrence, natural resources should be reasonably developed and utilized at low elevation to reduce the interference of unreasonable production activities and human activities; At high elevation, policies such as closing mountains for afforestation should be adopted to reduce the adverse effects caused by changes in the natural environment, so as to promote the ecological safety and high-quality development of CFPE.