气候与物种多样化率相互作用,决定全球热点地区四足动物的物种丰富度和性状多样性

IF 3.4 2区 环境科学与生态学 Q2 ECOLOGY
Matheus de T. Moroti, Alexander Skeels, Fernando R. da Silva, Diogo B. Provete
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引用次数: 0

摘要

目的两类机制为生物多样性模式提供了截然相反的解释:平衡动力学和非平衡动力学。虽然这两类机制并不一定相互排斥,但对其相对支持度的研究结果却好坏参半。因此,在同一地理区域的多个类群中对比这两种机制,可以为了解它们在解释不同生物多样性方面的作用提供有价值的见解。方法我们用气候、初级生产力和地形异质性来代表平衡动态,用多样化率和组合年龄来代表非平衡动态。然后,我们使用基于广义最小二乘法模型的空间显式结构方程模型来检验物种丰富度和性状多样性如何受到这些动态过程的影响。此外,我们还对每组变量进行了空间化处理,并检验了它们是否一致。结果多样化率是物种丰富度和性状多样性的强大正向驱动因素,而气候则是物种丰富度和性状多样性的间接和直接负向驱动因素。此外,我们还发现内温动物之间的物种丰富度模式是一致的,而外温动物之间的物种丰富度模式则不一致。主要结论高分化率和气候条件在决定性状多样性和物种丰富度方面起着关键作用。此外,物种丰富度和性状多样性在四足类群中对相同的变量做出了反应,但表现出不同的空间模式。这支持了这样一种观点,即这两种动力学共同作用,解释了区域尺度上的群落组合。我们的研究结果表明,这两类机制之间的二分法可能不足以解释大西洋森林等生物多样性和气候复杂环境中的多样性模式。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Climate Interacts With Diversification Rate in Determining Species Richness and Trait Diversity of Tetrapods in a Global Hotspot
AimTwo classes of mechanisms offer opposing explanations for biodiversity patterns: Equilibrium and nonequilibrium dynamics. While not necessarily mutually exclusive, studies investigating their relative support have shown mixed results. Thus, contrasting these mechanisms across multiple taxa in the same geographic area can provide valuable insights into their role in explaining different biodiversity facets. Here, we evaluated which variables representing these dynamics best explain functional and taxonomic diversity of four tetrapod clades in a global hotspot.LocationAtlantic forest.TaxonTerrestrial vertebrates.MethodsWe used climate, primary productivity and topography heterogeneity as proxy for equilibrium dynamics, and diversification rate and assemblage age as proxy for nonequilibrium dynamics. After that, we used spatially explicit structural equation models based on generalised least squares models to test how species richness and trait diversity are influenced by these dynamics processes. Furthermore, we spatialized the variables for each group and tested whether they were congruent.ResultsDiversification rate was a strong positive driver of species richness and trait diversity, while climate was both an indirect and direct negative driver of richness and trait diversity. Furthermore, we found a congruent pattern of richness between endotherms, but not between ectotherms. In contrast, the spatial distribution of trait diversity, assemblage age and diversification rate was distinct for each group.Main ConclusionHigh diversification rates and climatic conditions played a key role in determining trait diversity and species richness. In addition, species richness and trait diversity responded to the same variables across tetrapod lineages but showed different spatial patterns. This supports the idea that both dynamics operate together to explain community assembly at a regional scale. Our findings suggest that the dichotomy between these two classes of mechanisms may not sufficiently explain diversity patterns in biodiverse and climatically complex environments such as the Atlantic Forest.
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来源期刊
Journal of Biogeography
Journal of Biogeography 环境科学-生态学
CiteScore
7.70
自引率
5.10%
发文量
203
审稿时长
2.2 months
期刊介绍: Papers dealing with all aspects of spatial, ecological and historical biogeography are considered for publication in Journal of Biogeography. The mission of the journal is to contribute to the growth and societal relevance of the discipline of biogeography through its role in the dissemination of biogeographical research.
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