首页|南亚热带森林不同林型功能性状分布格局及其驱动机制

南亚热带森林不同林型功能性状分布格局及其驱动机制

扫码查看
原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
植物功能性状能反映植物对环境变化的响应，研究植物功能性状的分布格局有助于揭示群落的构建过程及其内在作用机制。该研究以鼎湖山南亚热带山地常绿阔叶林和沟谷雨林为研究对象，采集并测量了样地中木本植物的 12 种不同的功能性状，分别以 5 m×5 m、10 m×10 m、20 m×20 m的样方为尺度单元，通过计算平均成对性状距离指数来探讨群落中功能性状的分布格局及其驱动机制。结果表明，两个林型的群落中12个功能性状均存在不同程度变异，但功能性状在群落间的差异不显著(P>0。05)。两个林型的群落中功能性状空间分布格局均具有尺度依赖性，但不同尺度的驱动机制有差异，随着空间尺度的增大，山地常绿阔叶林的功能性状空间分布格局主要驱动机制由环境过滤转为扩散限制;沟谷雨林的由环境过滤和相似性限制转为扩散限制，两个林型在 20 m×20 m空间尺度上都是扩散限制。生态位分化和扩散限制综合作用于鼎湖山南亚热带山地常绿阔叶林和沟谷雨林的群落功能性状分布格局的产生及其群落构建过程，二者的贡献作用会随空间尺度发生变化。坡度是影响山地常绿阔叶林功能性状分布格局的最关键地形因子，海拔是影响沟谷雨林的最关键地形因子。
Distribution Pattern of Functional Traits and Mechanisms in Different Forest Types of South Subtropics
The growth,survival,reproduction,and spread of plants are significantly influenced by functional traits.Understanding the distribution pattern of plant functional traits is helpful to reveal the process of community construction and its internal mechanism.Twelve different functional traits of woody plants in Dinghu Mountain subtropical mountain evergreen broad-leaved forest and gully rainforest were collected and measured.The quadrats of 5 m×5 m,10 m×10 m and 20 m×20 m were used as scale units,respectively.The distribution pattern and driving mechanism of functional traits in communities were investigated by calculating mean pairwise trait distance(PW).The results showed that the 12 functional traits of the two forest types had different degrees of variation,but there was no significant difference between the communities(P>0.05).The spatial distribution pattern of functional traits in the two forest types was scale dependent,but the driving mechanism was different at different scales.With the increase of spatial scale,the main driving mechanism of spatial distribution pattern of functional traits in the mountain evergreen broad-leaved forest changed from environmental filtering to diffusion restriction.The environmental filtering and similarity restriction of ravine rainforest were changed to diffusion restriction,and both forest types were diffusion restriction at the spatial scale of 20 m×20 m.Niche differentiation and dispersal restriction were involved in the formation of community functional traits distribution pattern and community construction in the subtropical mountain evergreen broad-leaved forest and gully rainforest in Dinghu Mountain,and the contribution of both changes with spatial scale.Slope is the most important topographic factor affecting the distribution pattern of functional traits in mountain evergreen broad-leaved forest,and elevation is the most important topographic factor affecting gully rainforest.

Functional traitDistribution patternEnvironmental filtrationSimilarity limitationDispersal limitation

周景钢、李林、魏识广、练琚愉、叶万辉

展开 >

广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室,广西 桂林 541006

广西漓江流域景观资源保育与可持续利用重点实验室,广西 桂林 541006

桂林电子科技大学生命与环境科学学院,广西 桂林 541004

华南植物园中国科学院退化生态系统植被恢复与管理重点实验室,广州 510650

中国科学院核心植物园植物生态中心,广州 510650

展开 >

功能性状 分布格局 环境过滤 相似性限制 扩散限制

广西自然科学基金面上项目广西自然科学基金面上项目国家自然科学基金广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室项目

2020GXNSFAA1591082022GXNSFAA03558332060305ERESEP2021Z06

2024

10.11926/jtsb.4748

热带亚热带植物学报
中国科学院华南植物园,广东省植物学会

热带亚热带植物学报

CSTPCD北大核心
影响因子：0.627
ISSN：1005-3395
年,卷(期)：2024.32(2)
  • 51