The Relative Importance of Niche and Neutral Processes for the Community Assembly of Subtropical Karst Forest Communities at Different Spatial Scales
The Relative Importance of Niche and Neutral Processes for the Community Assembly of Subtropical Karst Forest Communities at Different Spatial Scales
复制标题
生态位过程和中性过程对不同空间尺度亚热带喀斯特森林群落群落组装的相对重要性
DOI：
10.3390/f13111930
复制
发表时间：
2022-11-01
期刊：
影响因子：
2.9
通讯作者：
Ning, Wenyan
中科院分区：
文献类型：
--
作者：
He, Yan;Liang, Shichu;Ning, Wenyan
随着空间尺度的变化，决定群落格局的生态过程和机制也在发生变化。为了了解这些空间效应，我们在广西桂林常绿落叶阔叶混交林中建立了一个中等大小的森林样地。在10 m × 10 m、20 m × 20 m、50 m × 50 m三个采样尺度下，比较了生态位模型和中性模型与观测物种丰度分布（SADs）的拟合程度。通过PER-SIMPER分析，进一步评价生态位过程和中性过程的相对贡献。研究结果表明，在10 m × 10 m和20 m × 20 m采样尺度上，基于生态位的选择和基于分散的中性过程同时表达。此外，基于分散的中性过程在每个采样尺度上都占主导地位。结果表明，在典型喀斯特森林环境中，以分散为基础的中性过程是森林群落结构的主要驱动力。最终，我们的工作将有助于未来喀斯特森林群落的恢复和重建工作，表明在这些工作中应考虑环境异质性，种间关系和地理空间差异。
As spatial scale changes, the ecological processes and mechanisms that determine community patterns change. To understand these spatial effects, we established a medium-sized forest plot in an evergreen and deciduous broad-leaved mixed forest in Guilin, Guangxi, southwestern China. Here, we compared the fit of niche and neutral models to the observed species abundance distributions (SADs) at three sampling scales (10 m x 10 m, 20 m x 20 m, 50 m x 50 m). We also performed a PER-SIMPER analysis to further evaluate the relative contribution of niche and neutral processes based on taxon occurrence data. Our results showed that niche-based selection and dispersal-based neutral processes are simultaneously expressed at the 10 m x 10 m and 20 m x 20 m sampling scales. Additionally, dispersal-based neutral processes were predominant at each sampling scale. From these results, we found that the dispersal-based neutral process is the prominent driver for forest community structure in a typical karst forest environment. Ultimately, our work will be useful for future restoration and reconstruction efforts in karst forest communities, showing that environmental heterogeneity, inter-species relationships, and geographic spatial differences should be considered in these efforts.