生物多样性 ›› 2025, Vol. 33 ›› Issue (11): 25275.  DOI: 10.17520/biods.2025275  cstr: 32101.14.biods.2025275

• 研究报告:植物多样性 • 上一篇    下一篇

新疆西天山雪岭云杉群落动态变化及其影响因素

黄继红1(), 依里帆·艾克拜尔江2,3, 程瑞明1, 王文栋4, 许玥1(), 姚杰1(), 丁易1,*()()   

  1. 1 中国林业科学研究院森林生态环境与自然保护研究所, 国家林业和草原局森林生态环境重点实验室, 北京 100091
    2 新疆西天山国家级自然保护区管理中心, 新疆伊宁 835000
    3 新疆西天山森林生态系统定位观测研究站, 新疆巩留 835400
    4 新疆林科院森林生态研究所, 乌鲁木齐 830063
  • 收稿日期:2025-07-17 接受日期:2025-10-21 出版日期:2025-11-20 发布日期:2025-12-26
  • 通讯作者: 丁易
  • 基金资助:
    国家自然科学基金(32271616);国家自然科学基金(42271069);国家重点研发计划(2023YFE0112800)

Dynamics of the Picea schrenkiana community in the west Tianshan Mountains of Xinjiang and their influencing factors

Jihong Huang1(), Erfan Akberjan2,3, Ruiming Cheng1, Wendong Wang4, Yue Xu1(), Jie Yao1(), Yi Ding1,*()()   

  1. 1 Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration, Ecology and Nature Conservation Institute, Chinese Academy of Forestry, Beijing 100091, China
    2 Administration of Xinjiang West Tianshan National Nature Reserve, Yining, Xinjiang 835000, China
    3 Xinjiang West Tianshan forest ecosystem observation and research station, Gongliu, Xinjiang 835400, China
    4 Institute of Forest Ecology, Xinjiang Academy of Forestry Sciences, Urumqi 830063, China
  • Received:2025-07-17 Accepted:2025-10-21 Online:2025-11-20 Published:2025-12-26
  • Contact: Yi Ding
  • Supported by:
    National Natural Science Foundation of China(32271616);National Natural Science Foundation of China(42271069);National Key Research and Development Program of China(2023YFE0112800)

摘要:

新疆天山的雪岭云杉(Picea schrenkiana)群落是我国重要的山地森林类型, 是维持新疆绿洲生态安全的重要屏障。研究天山雪岭云杉群落结构的长期动态变化, 对于理解干旱区山地温带针叶林生态系统功能的维持和开展适应性管理具有重要意义。本研究基于2008-2024年(分别在2008、2014、2019和2024年进行了4次调查)针对新疆西天山国家级自然保护区6 ha雪岭云杉群落动态监测样地中所有胸径 ≥ 1 cm的木本植物调查数据, 研究了雪岭云杉群落的动态变化规律。结果表明: (1)在过去的16年间, 雪岭云杉群落内的木本植物个体多度逐渐降低, 其中雪岭云杉的个体多度由1,310减少到1,123, 减少了14.27%, 2014-2019年间减少的比例最高。(2)木本植物的死亡率在2008-2014、2014-2019和2019-2024年3个不同时间段分别为0.06%、2.88%和1.99%, 呈现先增加后降低的变化趋势; 补充率分别为0.60%、0.60%和0.10%, 呈现后期下降的变化趋势; 物种周转率分别为0.62%、3.39%和2.08%, 呈现先急剧增加再下降的变化趋势; 群落地上生物量的生长量和损失量均在2014-2019年间最高, 但净变化在2008-2014年间最大。(3)物种丰富度显著提高了群落树木个体的补充率、死亡率和周转率; 较高的土壤有效氮含量显著降低了地上生物量的净变化, 而高的土壤pH值显著提高了地上生物量的净变化。本研究表明新疆西天山雪岭云杉群落正在经历显著的群落结构转变, 与此同时也面临着高死亡率与低补充率并存的衰退风险。

关键词: 温带针叶林, 雪岭云杉, 群落结构, 死亡率, 补充率

Abstract

Aims: Studying the dynamics of temperate coniferous forests is crucial for understanding their formation and maintenance. This study aims to: (1) investigate the long-term trends (over 16 years) in individual abundance, mortality rate, recruitment rate, and aboveground biomass within Picea schrenkiana communities; and (2) assess how local-scale abiotic factors (soil available nitrogen, pH, and topographic position) and biotic factors (local species richness and competition from dominant species) influence these community dynamics.

Methods: We selected a 6-ha temperate natural coniferous forest dynamics plot (FDP) in the west Tianshan National Nature Reserve, Xinjiang, as the research site. We conducted thorough surveys of woody plants with a diameter at breast height (DBH) ≥ 1 cm in 2008, 2014, 2019, and 2024, respectively. We analyzed and compared the changes in community composition, structure, and dynamics over these years.

Results: (1) Over the 16-year period, the abundance of woody plant individuals in the FDP decreased. Specifically, the total number of Picea schrenkiana individuals declined from 1,310 to 1,123, a reduction of 14.27%, with the most significant decrease occurring between 2014 and 2019. (2) Across the three time intervals (2008-2014, 2014-2019, 2019-2024), the mortality rates of woody plants were 0.06%, 2.88%, and 1.99%, respectively, showing an initial increase followed by a decrease. The recruitment rates were 0.60%, 0.60%, and 0.10%, respectively, remaining stable initially before a sharp decline. The turnover rates were 0.62%, 3.39%, and 2.08%, respectively, remaining stable initially, then sharply increasing, and finally decreasing. The loss and growth of aboveground biomass in the community were highest during the 2014-2019 period, while the net change in aboveground biomass was greatest during the 2008-2014 period. (3) The recruitment rate, mortality rate, and turnover rate of the community were all positively correlated with species richness. Soil available nitrogen content had a significant negative effect on the net change in aboveground biomass, whereas soil pH had a significant positive effect.

Conclusion: This study demonstrates that the Tianshan Picea schrenkiana community in the west Tianshan Mountains of Xinjiang is undergoing significant structural and functional changes and is at risk of decline due to high mortality and low recruitment rates. This research provides an important scientific basis for the ecological restoration and biodiversity conservation strategies of Tianshan Picea schrenkiana forests.

Key words: temperate coniferous forests, Picea schrenkiana, community structure, mortality rate, recruitment rate