Land-use change in plateau lake basin and its impact on urban ecological security
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GMGDA 2019
Land-use change in plateau lake basin and its impact on urban ecological security Zijiang Yang 1 & Xiong He 1 & Muhammad Aqeel Ashraf 2 Received: 7 August 2019 / Accepted: 8 January 2020 # Saudi Society for Geosciences 2020
Abstract Land-use change is a hot issue in global change research. Ecological security caused by land-use change at different spatial time scales is also one of the hot issues of research. This paper selects the plateau lakes in China as the study area, explores the land-use change in the basin from 1989 to 2015, and uses the pressure-state-response (PSR) model to analyze the ecological security of the Central Yunnan Basin qualitatively. According to the research, from 1989 to 2015, the annual change rate of integrated land-use dynamics in the basin was 0.66%; the 1989 and 2015 ecological safety indexes of Qilu Lake were 0.5912 and 0.5845, respectively, all in a “poor” safety state. From the perspective of the system as a whole, the pressure of natural and humanities has the most significant impact on the ecological security assessment of the basin. According to the research, it provides a theoretical basis for the ecological security construction of the plateau lakes in China. Keywords Plateau lake basin . Land-use change . Ecological security assessment
Introduction In recent decades, as the population rapidly increases and the technology speedily advances, human beings have changed the global environment in which they live at an unprecedented speed and scale. The natural ecosystem is changed and even destroyed, resulting in significant damages to the regional ecological security. Consequently, the survival and development of human society have been severely threatened. Therefore, research on ecological security has gradually become a hot issue. Among the ecological and environmental problems caused by human activities, the process of land-use change plays a decisive role in regional ecological security. Land cover is the source and sink of many materials flows and energy flows that support the Earth’s biosphere and geosphere. The change in land cover caused by human land This article is part of the Topical Collection on Geological Modeling and Geospatial Data Analysis * Zijiang Yang [email protected] 1
Yunnan University, Kunming 650504, China
2
School of Environmental Studies, China University of Geosciences, Wuhan 430074, China
use activities will inevitably affect the structure and function of ecosystems. For regional climate, hydrology, and bio-earth chemical cycles, and biodiversity have a significant impact, leading to changes in regional ecological security. The basin is a natural, social, and economic composite system, which includes two subsystems: the natural subsystem of the basin and the social economy of the basin. Changes in land-use and ecological security level are important factors affecting the sustainable development of China’s plateau lake basins, and the primary factor associated with regional ecological security status is the spatial pattern of land
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