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生态学杂志 ›› 2021, Vol. 40 ›› Issue (11): 3501-3511.doi: 10.13292/j.1000-4890.202111.016

• 研究报告 • 上一篇    下一篇

川西米亚罗亚高山暗针叶林动态样地物种组成与群落结构

赵广东1,2,陈健1,2,许格希1,2,马凡强1,2,杨洪国3,史作民1,2,4*,刘顺1,2,熊凯1,2,张运1,2,薛樵5,刘千里6   

  1. （1中国林业科学研究院森林生态环境与保护研究所， 国家林业和草原局森林生态环境重点实验室， 北京 100091；2四川米亚罗森林生态系统定位观测研究站， 四川理县 623100；3中国林业科学研究院湿地研究所， 北京 100091；4南京林业大学南方现代林业协同创新中心， 南京 210037；5理县环境保护和林业局,  四川理县 623100；6阿坝州林业与草原科学技术研究所， 四川汶川 623000）
  • 出版日期:2021-11-10 发布日期:2022-05-10

Species composition and community structure of Miyaluo subalpine dark coniferous forest dynamic plot in western Sichuan, China.

ZHAO Guang-dong1,2, CHEN Jian1,2, XU Ge-xi1,2, MA Fan-qiang1,2, YANG Hong-guo3, SHI Zuo-min1,2,4*, LIU Shun1,2, XIONG Kai1,2, ZHANG Yun1,2, XUE Qiao5, LIU Qian-li6   

  1. (1Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing 100091, China; 2Miyaluo Research Station of Alpine Forest Ecosystem, Lixian County 623100, Sichuan, China; 3Institute of Wetland Research, Chinese Academy of Forestry, Beijing 100091, China; 4Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China; 5Environmental Protection and Forestry Bureau of Lixian County, Lixian County 623100, Sichuan, China; 6Aba Prefecture Institute of Forestry and Grass Science and Technology, Wenchuan 623000, Sichuan, China).
  • Online:2021-11-10 Published:2022-05-10

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摘要： 亚高山暗针叶林是川西米亚罗林区的主要植被类型。为了更好地了解位于青藏高原东南缘的亚高山暗针叶林的物种组成和群落结构，依据美国热带森林研究中心（CTFS）和中国森林生物多样性监测网络（CForBio）的建设标准，于2016—2019年在四川省米亚罗省级自然保护区的亚高山暗针叶林建立了一个面积为9.6 hm2（400 m×240 m）的动态样地。本文基于2019年9月完成的动态样地内胸径（DBH）≥1 cm的木本植物调查数据，分析了亚高山暗针叶林的区系类型、物种组成、群落结构和径级分布。结果表明：动态样地内DBH≥1 cm的木本植物存活个体共有50055株，其中独立个体24183个，分枝或萌株25872个，隶属于14科20属32种。温带区系成分的科和属分别占总科数和总属数的64.28%和85.00%，温带区系特征明显。高山柏（Juniperus squamata）、云杉（Picea asperata）、松潘小檗（Berberis dictyoneura）和滇川醉鱼草（Buddleja forrestii）为稀有种，占总物种数目的12.50%。共有10个物种的重要值>2，其重要值之和为90.54。排名前4位的岷江冷杉（Abies fargesiivar.faxoniana）、糙皮桦（Betula utilis）、密枝圆柏（Juniperus convallium）和紫花茶藨子（Ribes luridum）的重要值分别为30.55、15.74、9.95和8.80。动态样地面积小于1.6 hm2时，物种数目随动态面积的增加而急剧增加；当动态样地面积达到6.76 hm2时，32个物种全部出现。动态样地内所有存活个体的平均胸径为5.29 cm，整体径级分布呈倒“J”型，DBH<2.5 cm存活个体数量占总个体数量的59.63%。

关键词: 森林动态样地, 生物多样性, 区系类型, 重要值, 径级分布

Abstract: Subalpine dark coniferous forest is the dominant vegetation in Miyaluo forest region of the western Sichuan. To better understand species composition and community structure of subalpine dark coniferous forest in the southeastern edge of the Tibetan Plateau, a 9.6 hm2 forestdynamics plot was established in Sichuan Miyaluo Provincial Nature Reserve from 2016 to 2019, following the field protocol of the Center for Tropical Forest Science (CTFS) and the Chinese Forest Biodiversity Monitoring Network (CForBio). In this study, we analyzed the floristic types, species composition, community structure, and DBH size distribution on the basis of the data collected from all living woody plants with diameter at breast height (DBH) ≥1 cm. The results showed that there were 50055 living stems in total, including 24183 independent individuals and 25872 branching or sprouting stems, belonging to 32 species, 20 genera, and 14 families. The numbers of families and genera of temperate floristic elements accounted for 64.28% and 85.00%, respectively. Juniperus squamata, Picea asperata, Berberis dictyoneura,and Buddleja forrestii were the rare species, which together accounted for 12.50% of the total species richness. Ten species with importance value (IV) >2 had a total IV value of 90.54. The IV of top four dominant species, Abies fargesiivar. faxoniana, Betula utilis, Juniperus convallium, and Ribes luridumwas 30.55, 15.74, 9.95, and 8.80, respectively. When plot area was less than 1.6 hm2, the number of species increased rapidly with the increasing area. When plot area reached 6.76 hm2, all of the 32 species appeared. The mean DBH of all living individuals in the whole plot was 5.29 cm. The DBH size distribution of all living individuals showed an inverse “J” type. The stems with DBH <2.5 cm represented 59.63% of the total individuals in the whole plot.

Key words: forest dynamics plot, biodiversity, floristic type, importance value, DBH size distribution.

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