浙江珍稀濒危植物现状及优先保护研究.

The present study analyzed the listed rare and endangered plants on List of National Key Protected Wild Plants in China (2021) and List of Key Protected Wild Plants in Zhejiang Province (2023) (to be announced), which are known to occur in Zhejiang Province and their patterns of distribution. Using the coefficients of endangerment, genetic value, and species value, priority protection of rare and endangered plants in the province was quantitatively analyzed. The results were as follows: (1) A total of 333 rare and endangered species belonging 229 genera in 101 families had been documented as occurring in Zhejiang, of which 311 species (accounting for 93.39%) were seed plants. The family Orchidaceae had the greatest species richness with 56 species in 32 genera. (2) At the regional level, the highest densities of rare and endangered plants in Zhejiang were mainly concentrated in the Tianmu Mountain area (including 147 species) in Northwest Zhejiang and the Donggong Mountain area (including 164 species) in Southwest Zhejiang, whereas fewer rare and endangered plant species were distributed in the plains of North Zhejiang. (3) Based on elevation, the distribution of rare and endangered species revealed a reversed “U”-shaped pattern of firstly increasing with increasing elevation and then decreasing as the elevation continued to increase. The largest number of rare and endangered species (144 in 113 genera of 60 families) was found at elevations 601 to 800 m above sea level (a.s.l) . (4) According to the quantitative analysis of priority protection, 82 species (24.62%) were classified as requiring the first level of priority protection (I), and 144 (43.24%), 85 (25.53%), and 22 (6.61%) species were classified as levels Ⅱ, Ⅲ, and Ⅳ, respectively. It is a species richness of rare and endangered plants in Zhejiang Province, and this analysis provides a more intuitive reflection of urgent need for a specific degree of protection for various species. The current status of each species is roughly consistent with the results, and it is necessary to strengthen monitoring for proposing dynamically adjustments of the priority protection order for rare and endangered plants. [ABSTRACT FROM AUTHOR]