湖北九宫山珍稀植物鹅掌楸群落结构与物种组成

doi:10.13292/j.1000-4890.202202.011

生态学杂志 ›› 2022, Vol. 41 ›› Issue (3): 435-443.doi: 10.13292/j.1000-4890.202202.011

湖北九宫山珍稀植物鹅掌楸群落结构与物种组成

吕林玉^1,2,3,4,5,王建⁶,吴浩^3,4,5,王世彤^3,4,5,周天阳^3,4,5,徐耀粘^3,4,5,魏新增^3,4,5,江明喜3^,4,5*

(¹西藏大学青藏高原生态与环境研究中心，拉萨 850000； ²西藏大学理学院，拉萨 850000； ³中国科学院武汉植物园，中国科学院水生植物与流域生态重点实验室，武汉 430074； ⁴中国科学院核心植物园保护生物学中心，武汉 430074； ⁵中国科学院大学，北京 100049；⁶湖北九宫山国家级自然保护区管理局，湖北通山 437100)

出版日期:2022-03-10 发布日期:2022-03-07

Species composition and community structure of a mixed broadleaf conifer forest dominated by Liriodendron chinense in the Jiugong Mountain, central China.

LYU Lin-yu^1,2,3,4,5, WANG Jian⁶, WU Hao^3,4,5, WANG Shi-tong^3,4,5, ZHOU Tian-yang^3,4,5, XU Yao-zhan^3,4,5, WEI Xin-zeng^3,4,5, JIANG Ming-xi^3,4,5*

(¹Research Center for Ecology and Environment of Qinghai-Tibetan Plateau, Tibet University, Lhasa 850000, China; ²College of Science, Tibet University, Lhasa 850000, China; ³Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China; ⁴Center of Conservation Biology, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China; ⁵University of Chinese Academy of Sciences, Beijing 100049, China; ⁶Hubei Jiugongshan National Nature Reserve Administration, Tongshan 437100, Hubei, China).

Online:2022-03-10 Published:2022-03-07

摘要/Abstract

摘要： 为了解珍稀植物鹅掌楸(Liriodendron chinense)种群结构特征，加强其就地保护，基于湖北九宫山国家级自然保护区建立的1 hm²长期监测样地，分析了鹅掌楸所在群落的物种组成、优势种的径级结构和空间分布格局、鹅掌楸的种内关联及其与群落优势种的种间关联。样地共有胸径≥1 cm的木本植物7159株，隶属于40科76属113种。群落优势种为交让木(Daphniphyllum macropodum)、黄山松(Pinus taiwanensis)、格药柃(Eurya muricata)、枹栎(Quercus serrata)、黄丹木姜子(Litsea elongate)、白木乌桕(Neoshirakia japonica)和鹅掌楸。整体径级结构呈倒“J”型，表明该群落更新良好。鹅掌楸的径级结构为波动型，表明有较大潜力发展成稳定的种群。鹅掌楸主要分布在样地的东南角，表现出明显的生境偏好。其空间分布格局在0~32 m和34~35 m尺度上表现为聚集分布，在50 m尺度上表现为均匀分布。鹅掌楸的幼树与中龄树、幼树与成年树以及中龄树与成年树在大部分尺度上无关联，仅在个别尺度上呈现正关联或负关联。鹅掌楸与该群落的其他优势种在小尺度上均表现为负关联。总体来说，该群落类型为过渡性的针阔混交林，物种组成和群落结构处于不稳定阶段，应加强保护和管理以促进鹅掌楸天然种群的更新与生存。

关键词: 鹅掌楸, 物种组成, 径级结构, 点格局分析, 种内关联, 种间关联

Abstract: To understand population structure of Liriodendron chinense and strengthen its in situ conservation, we established a 1 hm² plot in the Jiugongshan National Nature Reserve, central China. We recorded species composition of the plot, and analyzed sizeclass structure, spatial distribution pattern, conspecific association, and interspecific association of seven dominant species. A total of 7159 living individuals were recorded, belonging to 113 species, 76 genera, and 40 families. The dominant species were Daphniphyllum macropodum, Pinus taiwanensis, Eurya muricata, Quercus serrata, Litsea elongate, Neoshirakia japonica,and L. chinense. The sizeclass structure of all individuals showed a reversed “J” shape, indicating good natural regeneration in this community. The sizeclass structure of L. chinense was fluctuating and had great potential to develop into a stable population. L. chinense mainly occurred at the southeast corner of the plot, suggesting an obvious habitat preference. The spatial distribution pattern of L. chinense was aggregated at scales of 0-32 m and 34-35 m, and uniform at scale of 50 m. There were no correlations among sapling, middleaged, and adult individuals ofL. chinense at most scales, with the exception of positive or negative correlations at some scales. Overall, this mixed broadleaf-conifer forest was a transitional community type, with species composition and community structure being instable. Conservation and management should be strengthened to promote the regeneration and survival of natural L. chinense populations.

Key words: Liriodendron chinense, species composition, size-class structure, point pattern analysis, conspecific association, interspecific association.

吕林玉, 王建, 吴浩, 王世彤, 周天阳, 徐耀粘, 魏新增, 江明喜. 湖北九宫山珍稀植物鹅掌楸群落结构与物种组成[J]. 生态学杂志, 2022, 41(3): 435-443.

LYU Lin-yu, WANG Jian, WU Hao, WANG Shi-tong, ZHOU Tian-yang, XU Yao-zhan, WEI Xin-zeng, JIANG Ming-xi. Species composition and community structure of a mixed broadleaf conifer forest dominated by Liriodendron chinense in the Jiugong Mountain, central China.[J]. Chinese Journal of Ecology, 2022, 41(3): 435-443.

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湖北九宫山珍稀植物鹅掌楸群落结构与物种组成

Species composition and community structure of a mixed broadleaf conifer forest dominated by Liriodendron chinense in the Jiugong Mountain, central China.

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