[Ecological Zoning of Urban Agglomeration of Central Guizhou Through Ecological Resilience].

Abstract

Ecological resilience plays a crucial role in maintaining system security and protecting the environment when urban systems are subjected to human activities and natural disasters， and ecological zoning based on ecological resilience （ER） has great significance for effective management of regional structure and improvement of ecological environment. Here， taking the urban agglomeration of central Guizhou as an example， we constructed an analytical framework of ecological potential （EP）-ecological elasticity （EE）-ecological stability （ES） to assess the ER level of the study area from 2000 to 2023 using a GIS grid， the unit-area-equivalent-factor method， elasticity coefficient， and landscape pattern index and also outlined the three ecological zones and established differentiated zoning strategies. The results of the study follow： ① The ER value showed an increasing trend during 2000-2010， it decreased with the largest change， which was most obviously affected by a significant decrease of stability， during 2010-2020， and then showed a slow increasing trend during 2020-2023. The distribution pattern of ER can be described as "low in the center and high in the periphery." ② For different ER levels， there were three types of zones： key restoration zones distributed in the Nanming District in Guiyang， Anshun， and the Guian New Area， source protection zones distributed in the north-central part of the county and townships， and moderately developed zones distributed in Dushan County of Qiannan and Congjiang County of Qiandongnan Prefecture， among other areas. ③ Optimization of the spatial layout of corresponding restoration results was carried out to promote regional development and resource utilization.