Forest characteristics,population structure and growth trends of threatened relict Pseudotsuga forrestii in China  

作　　者：Cindy Q.Tang Shi-Qian Yao Peng-Bin Han Jian-Ran Wen Shuaifeng Li Ming-Chun Peng Chong-Yun Wang Tetsuya Matsui Yong-Ping Li Shan Lu Yuan He 

机构地区：[1]Institute of Ecology and Geobotany,College of Ecology and Environmental Science,Yunnan University,Building Shixun,Chenggong Campus,Dongwaihuan South Road,University Town,Chenggong New District,Kunming,Yunnan 650504,China [2]College of Life Sciences,Yunnan University,Shengming Kexueyuan Building#2,Chenggong Campus,Dongwaihuan South Road,University Town,Chenggong New District,Kunming,Yunnan 650504,China [3]Institute of Highland Forest Science,Chinese Academy of Forestry,Kunming,Yunnan 650224,China [4]Forestry and Forest Products Research Institute,Forest Research and Management Organization,Matsunosato 1,Tsukuba-shi,Ibaraki-ken,305-8687,Japan [5]Faculty of Life&Environmental Sciences,University of Tsukuba,1-1-1 Tennodai,Tsukuba,Ibaraki,305-8572,Japan [6]College of Natural Resources,Yunnan University,Chenggong Campus,Dongwaihuan South Road,University Town,Chenggong New District,Kunming,Yunnan 650504,China [7]Forestry and Grassland Bureau of Diqing Tibetan Autonomous Prefecture,1st Floor of Government Building,Shengping Town,Deqing County,Yunnan 674500,China [8]Forestry and Grassland Bureau of Weixi Lisu Autonomous County,Nanjian Dao#7,Baohe Town,Weixi Lisu Autonomous County,Yunnan 674600,China

出　　处：《Plant Diversity》2023年第4期422-433,共12页植物多样性（英文版）

基　　金：This study received financial support from the Science and Technology Department of Yunnan University,China(2019YNU002);Major Program for Basic Research Project of Yunnan Province,China(202101BC070002);the Special Foundation for National Science and Technology Basic Resources Investigation of China(2019FY202300).

摘　　要：Pseudotsuga forrestii is a relict evergreen coniferous tree species in Pinaceae endemic to China.P.forrestii tree numbers have greatly decreased due to deforestation,over-utilization and habitat degradation.Here we clarify P.forrestii community types,structure,species diversity,seedling recruitments and growth trends.We identified four P.forrestii community types:(1)Pseudotsuga forrestii-Quercus guyavifolia-Acer davidii evergreen coniferous and broad-leaved mixed forest;(2)Pseudotsuga forrestii-Pinus yunnanensis-Quercus guyavifolia evergreen coniferous and broad-leaved mixed forest;(3)Pseudotsuga forrestii evergreen coniferous forest;(4)Pseudotsuga forrestii-Abies georgei var.smithii evergreen coniferous forest.P.forrestii forests are characterized by both warm temperate and temperate affinities.Simpson diversity,Pielou evenness,Shannon-Wiener diversity indices ranged from 0.75 to 0.76,0.74-0.81,and 1.62-1.93,respectively,with no significant differences among the four forest types.The forest stratification was multilayered.The canopy layer was generally 10-25 m tall,with the emergent layer reached 25-42 m.DBH and age structures of P.forrestii showed multimodal distributions.Its maximum age P.forrestii was 570 years with a DBH of 143 cm.The growth of annual ring width of P.forrestii was slow,and generally decreased with age,whereas the basal area at the breast height increased with age.Established seedlings/saplings were mainly found in unstable micro-habitats.Regeneration of P.forrestii depends on moderate natural disturbances.Finally,we provide recommendations for P.forrestii conservation.

关 键 词：Pseudotsuga forrestii Community structure Species diversity Population structure Regeneration Growth trend 

分 类 号：S718.5[农业科学—林学]