中国东南部森林树木β多样性的纬向格局及其生态过程在不同空间尺度上存在差异。

IF 6.3 1区 生物学 Q1 PLANT SCIENCES
Plant Diversity Pub Date : 2024-11-13 eCollection Date: 2025-01-01 DOI:10.1016/j.pld.2024.11.003
Maochou Liu, Wenxiang Wu, Ke Wang, Xinshuai Ren, Xueqin Zhang, Lei Wang, Jing Geng, Bo Yang
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引用次数: 0

摘要

树木β-多样性的纬度格局揭示了影响森林生态系统的生物地理过程的重要见解。尽管以往的研究在相对较小的空间范围内广泛记录了β多样性,但在更大的空间范围内,β多样性沿纬度梯度的潜在驱动因素仍未得到很好的理解。在这项研究中,我们确定了中国东南部森林树木β-多样性是否与纬度相关,如果是,那么哪些生态过程促成了这些树木β-多样性的模式。我们特别致力于在不同的空间范围内理清种间聚集和环境过滤的相对贡献。我们在随机焦点样地周围圈定了由多个邻近国家森林清查样地组成的区域群落。区域群落中NFI样地的数量作为空间范围的替代指标。我们还使用零模型来模拟随机聚集的群落,并量化观察到的和预期的β-多样性之间的偏差(β-偏差)。结果表明,β-多样性呈纬向递减趋势,且在较大的空间范围内表现得更为明显。此外,物种空间聚集程度解释了β-偏差的纬度分布格局。我们还确定了导致这些森林β偏离的环境因素,包括降水、季节性和温度变化。在更大的空间范围内,这些环境变量解释了高达84%的β-偏差。研究结果表明,生态过程具有尺度依赖性,并共同影响亚热带森林的β-梯度。我们建议采取保护措施,在多个空间范围内保持森林多样性和异质环境,以减轻气候变化的不利影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Latitudinal patterns of tree β-diversity and relevant ecological processes vary across spatial extents in forests of southeastern China.

Latitudinal patterns of tree β-diversity reveal important insights into the biogeographical processes that influence forest ecosystems. Although previous studies have extensively documented β-diversity within relatively small spatial extents, the potential drivers of β-diversity along latitudinal gradients are still not well understood at larger spatial extents. In this study, we determined whether tree β-diversity is correlated with latitude in forests of southeastern China, and if so, what ecological processes contribute to these patterns of tree β-diversity. We specifically aimed to disentangle the relative contributions from interspecific aggregation and environmental filtering across various spatial extents. We delineated regional communities comprising multiple nearby national forest inventory (NFI) plots around random focal plots. The number of NFI plots in a regional community served as a surrogate for spatial extent. We also used a null model to simulate randomly assembled communities and quantify the deviation (β-deviation) between observed and expected β-diversity. We found that β-diversity decreased along a latitudinal gradient and that this pattern was clearer at larger spatial extents. In addition, latitudinal patterns of β-deviation were explained by the degree of species spatial aggregation. We also identified environmental factors that drive β-deviation in these forests, including precipitation, seasonality, and temperature variation. At larger spatial extents, these environmental variables explained up to 84% of the β-deviation. Our results reinforce that ecological processes are scale-dependent and collectively contribute to the β-gradient in subtropical forests. We recommend that conservation efforts maintain diverse forests and heterogeneous environments at multiple spatial extents to mitigate the adverse effects of climate change.

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来源期刊
Plant Diversity
Plant Diversity Agricultural and Biological Sciences-Ecology, Evolution, Behavior and Systematics
CiteScore
8.30
自引率
6.20%
发文量
1863
审稿时长
35 days
期刊介绍: Plant Diversity (formerly Plant Diversity and Resources) is an international plant science journal that publishes substantial original research and review papers that advance our understanding of the past and current distribution of plants, contribute to the development of more phylogenetically accurate taxonomic classifications, present new findings on or insights into evolutionary processes and mechanisms that are of interest to the community of plant systematic and evolutionary biologists. While the focus of the journal is on biodiversity, ecology and evolution of East Asian flora, it is not limited to these topics. Applied evolutionary issues, such as climate change and conservation biology, are welcome, especially if they address conceptual problems. Theoretical papers are equally welcome. Preference is given to concise, clearly written papers focusing on precisely framed questions or hypotheses. Papers that are purely descriptive have a low chance of acceptance. Fields covered by the journal include: plant systematics and taxonomy- evolutionary developmental biology- reproductive biology- phylo- and biogeography- evolutionary ecology- population biology- conservation biology- palaeobotany- molecular evolution- comparative and evolutionary genomics- physiology- biochemistry
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