Spatio-temporal Characteristics of Ecosystem Service Value in Henan Province under Different Land Use Scenarios.

As the supporting region for ecological barrier in the Yellow River Basin, it is of profound significance for Henan Province to explore the relationship between land use and ecosystem service value (ESV) for promoting ecological protection and high-quality development in the basin. In this paper, the ESV equivalent table proposed by Xie Gaodi et al was revised and the ecological value of construction land was also incorporated into the table. Combined with the FLUS model, the ESV of Henan from 2000 to 2050 was calculated. The historical evolution characteristics of ESV and the impact of different land use scenarios on ESV were analyzed. The results are shown as follows. (1) The ESV of Henan showed a trend of rising, falling and rising again from 2000 to 2020. The spatial distribution pattern was high in the West and low in the East. The distribution range of low value areas and sub-high value areas was enlarged. (2) The ESV in each city of Henan showed an upward trend from 2000 to 2010, and first decreased and then increased from 2010 to 2020. The ESV and its variation in Nanyang, Xinyang and Luoyang were higher, contributing to about 50% ESV in Henan. (3) The ESV ratios of cultivated land, forest land and water area were relatively high. During the study period, the growth of ESV mainly benefited from the expansion of water area and forest land, while the reduction of cultivated land and the disorderly expansion of construction land were the key factors leading to the decline of ESV. (4) From 2025 to 2050, the ESV in Henan will be the highest under the cultivated land protection scenario and the lowest under the natural scenario. It is very important to protect farmland, forest, grass, water area and reduce the disorderly expansion of construction land for maintaining and improving ecosystem service value in the next 30 years. [ABSTRACT FROM AUTHOR]