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Niche of rare herbage plants in the upstream of Lancang River

Authors Wei Wenchao; He Youjun; Zou Dalin; Du Hua; Cui Guofa; Zheng Jie; Dong Jiahsheng; Li Yongbo

Journal Journal of Beijing Forestry University , JAN 30 2020,:247

DOI 10.1016/j.jep.2019.112275 PubMed 31589966

Abstract The niche characteristics of Sinopodophyllum hexandrum, Circaeaster agrestis, Herminium monorchis and a few herbage species are described and analyzed, with different community styles and altitudes as the resource state and with the importance value and the abundance as the resource state descriptor of the niche. The results indicate that Sinopodophyllum hexandrum, Circaeaster agrestis and Herminium monorchis have lower niche breadth values and have higher requirement of habitat, which shows their rarity, and the priority to be conserved . Most of Sinopodophyllum hexandrum populations are distributed at the altitude of 3 600 ~ 3 650 m, and their number reduce gradually with the increase of the altitude. Nearly all of Circaeaster agrestis populations are distributed at the altitude of 3 650 - 3 750 m with stochastic distribution. 50% of the population-links have a niche similarity over 0.5, and the niche similarity between Sinopodophyllum hexandrum and Circaeaster agrestis is higher, which shows that their niches are more similar. Niche overlap between a few herbage species is lower and only 21.43% of them have a niche overlap over 0.01. The niche overlap between Sinopodophyllum hexandrum , Circaeaster agrestis , and Herminium monorchis is lowest.

Species covered 角盘兰 Herminium monorchis 桃儿七 Sinopodophyllum hexandrum