Abstract
The service function of freshwater ecosystem is of great significance for ensuring the water security and the sustainable development of the social economy. However, it is vague how land-use change can influence freshwater ecosystem service flows. In this paper, we analyzed the land-use changes in the Lianshui River Basin from 2000 to 2018, built an ecosystem service flow model, and quantified the supply, demand, and flow of freshwater ecosystems under land-use change. The most intensified shifts of land-use change were the transfer of woodland to arable land and the transfer of arable land to built-up land. Urbanization and deforestation have increased water output by 0.06 billion m3, but water demand has increased by 2.42 billion m3, resulting in a 6% reduction in the flow of freshwater ecosystem services. Our study provides detailed information on freshwater ecosystem services flow from providers to beneficiaries within a watershed, showing how land-use change and ecosystem service flows can be integrated at the watershed scale to provide information for land-use management and the availability of freshwater ecosystems. Sustained development provides a scientific basis.
Highlights
0.06 billion m3, but water demand has increased by 2.42 billion m3, resulting in a 6% reduction in the flow of freshwater ecosystem services
Our study provides detailed information on freshwater ecosystem services flow from providers to beneficiaries within a watershed, showing how land-use change and ecosystem service flows can be integrated at the watershed scale to provide information for land-use management and the availability of freshwater ecosystems
Changes in land-use had a small positive impact on the supply of freshwater ecosystem services, but the increased industrial and agricultural water demand had a larger impact, resulting in a 6% reduction in the flow of freshwater ecosystem services across the study area
Summary
Life originates from water, and water is an important component of all living things, and its importance is self-evident. Freshwater supply is closely related to human well-being and is one of the most important ecosystem services [1]. Aquatic ecosystems were the main providers of ecosystem services, especially in the area south of the Yangtze. Freshwater ecosystem services have great constraints on the sustainable development of many river basins in the south. With the rapid economic development and intensification of land-use, excessive resource development has caused serious damage to the environment. The research on ecosystem services has become a hot spot and frontier, which is of great significance to regional ecology and sustainable development [3,4]
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