自然保护区对珍稀濒危野生植物保护效率评价

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Abstract Nature reserves play an irreplaceable role in the in-situ conservation of biodiversity. Currently, quantitative assessment of the conservation efficiency of nature reserves for rare and endangered species is one of the hot research topics. In the present study, Gansu Province, a biodiversity hotspot, was chosen as the research area. Based on remote sensing and GIS technology, the distribution of the main rare and endangered wild plants and the information of resources in their habitats were systematicly collected. The habitat suitability distribution pattern of 29 species of rare and endangered plants was then simulated by using the species habitat suitability evaluation model, and the biodiversity conservation value of the main rare and endangered plants was calculated by using the substitution cost method. Finally, the protection effect of the natural reserves on rare and endangered wild plants was evaluated from multiple perspectives by using indicators including the suitable habitat area of species, the importance of habitat, and the protection value of rare and endangered plants. The results indicate that:(1) The area of the suitable habitat was 72988.12km², with few region having high suitable values. The five species of plants including Anisodamine, Rhizoma Bletillae, Plum Blossom, Artemisia selengensis, and Acer miaotai were widely distributed, accounting for 80.72% of the total suitable habitat distribution area. In addition, the distribution difference of suitable habitat between the northern and southern part of Gansu Province was obvious; (2) The protection value of rare and endangered wild plants was 267.474billion Yuan in Gansu Province. The high value areas are mainly concentrated in Longnan and Gannan in the south of Gansu Province, and the overall distribution trend of the protection value gradually decreases from the northeast to the southwest, with the highest value area located in the forest area in the south of Gansu Province, followed by the northern Qilian Mountain area, and the Chinese Loess Plateau; (3) The area of suitable habitats in nature reserves accounts for 33.56% of the distribution area of suitable habitats in Gansu Province. The area of region with an importance value of suitable habitats greater than 5 (high-value region) in nature reserves only accounts for 34.86% of the high-value areas of suitable habitats in Gansu Province. A large part of high-value regions are not included in the strict protection of nature reserves. The value of biodiversity conservation in the overlapping area of natural reserves and suitable habitats is 64.585billion Yuan, accounting for 24.15% of biodiversity conservation value in Gansu Province. Although the natural reserves can better represent the suitable habitats in Gansu Province to a certain extent, there is a mismatch between their spatial distribution and the suitable distribution range of rare and endangered wild plants and the high value regions for biodiversity conservation. The present study has important guiding significance for the optimization and adjustment of nature reserves and the formulation of biodiversity conservation strategies.

Key words： nature reserve biodiversity rare and endangered biodiversity conservation priority area

Received: 24 February 2023

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	ZHAO Xiao-jiong
	WANG Jian
	SU Jun-de

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ZHAO Xiao-jiong,WANG Jian,SU Jun-de. Evaluation on the conservation efficiency of natural reserves for rare and endangered wild plants[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(10): 5412-5421.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I10/5412

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