A plot-based dataset of Pinus densata Alliance in China

Endemic to China, this alliance occurs in west Sichuan, northwest Yunnan, and southeast Xizang. In this study, we defined the geographic distribution boundary and priliminarily ascertained the geographic distribution area of Pinus densata alliance based on previous literature and field investigation sites.

Using data from 48 plots surveyed during 2020–2022, we proposed a preliminary scheme of vegetation classification and described the community structure characteristics for Pinus densata alliance, and analyzed species composition characteristics combined with data from 11 plots surveyed in 2012. The results showed that (1) the distribution area of Pinus densata alliance covered 33 counties and cities, including Yajiang, Xiangcheng, Daocheng, Dêqên, Xamgyi’nyilha , Markam, Mainling, and so on, at an altitude ranging from (2 300) 2 500 to 3 800 (4 000) m, and the eastern, western, northern and southern boundaries were Donggu Town in Danba County, Zengqi Township in Sangri County, Puxi Township in Zamtang County, and Yulong Snow Mountain in Yulong Naxi Autonomous County.