Abstract
Wetland is one of the most important ecosystems in the world. A healthy wetland ecosystem is important to the development of a regional and even global economy, and it is also beneficial to the human living conditions. In this paper, remote sensing (RS), landscape metrics were used to analyze the land use/land cover change (LUCC), landscape pattern change and the ecosystem services value (ESV) from 1987 to 2017 in Nansi Lake wetland of China. The results showed: 54.4% of the natural wetlands in Nansi Lake were replaced by constructed wetlands in the past 30 years, the ecosystem was degraded and the landscape structure was fragmented due to the severe drought in 2002 and the development of aquaculture and tourism in recent years. The ESV of Nansi Lake wetland fluctuated from 1987 to 2017, and the average annual ESV ($8134/hm2) was much lower than that of global and China’s wetlands, the LUCC driven by human production and economic development leads to the reduction of ESV, especially the rapid increase of constructed wetlands. Finally, the implications of wetland laws and policies, wetland monitoring, assessment and database construction, and wetland regional development strategies were discussed for wetland protection and management.
Highlights
Ecosystem services (ES) are the flow of natural capital to society, such as wood, fiber, food and drinking water [1]
Nansi Lake wetland as the study area, we aim to evaluate the ecosystem services value (ESV) of Nansi Lake wetland based on land use and landscape pattern changes over the past three decades, the specific objectives include: Quantify and characterize the land use/land cover change (LUCC) and landscape pattern change from 1987 to 2017 based on six sets of Landsat TM images; Assess and analyze the ESV of Nansi Lake wetland in the past 30 years; Discuss the driving factors of LUCC and landscape pattern change and the impact of landscape change on the ESV, and propose the implications for wetland protection and management
According to the land use characteristics and interpretation marks of remote sensing images, the land use types of Nansi Lake wetland were classified into three categories and eight subcategories: natural wetland, constructed wetland and non-wetland (Table S1)
Summary
Ecosystem services (ES) are the flow of natural capital to society, such as wood, fiber, food and drinking water [1]. As one of the three most significant ecosystems, the wetland ecosystem is known as the “kidney” [2] of the earth because of its ecological regulating functions and valuable natural resources. Wetlands supply a variety of resources for human’s production and life, and provide via ecological services either directly or indirectly including climate regulation, water conservation, purification, soil conservation and biodiversity protection [4,5,6,7], which have played an important role throughout history to secure human well-being, as well as the social and cultural evolution of humankind [3,8,9]. Wetland research and protection has become the consensus of governments, the public and the international academic community in the 21st century [15]
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