墨西哥热带干旱地区 43 年间贝塔多样性和植物元群落结构的时间动态变化

IF 2.6 3区 环境科学与生态学 Q2 ECOLOGY
Monserrat Jiménez , José Alejandro Zavala-Hurtado , Ernesto Vega , María Márquez-Haro
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引用次数: 0

摘要

了解元群落结构和时间贝塔多样性的动态对于理解地方和区域尺度的生态动态至关重要;对于评估气候变化、扩散和生物相互作用等因素的影响也至关重要。我们研究了墨西哥半干旱地区 Zapotitlán 山谷 199 种多年生植物在 43 年间的组成和丰度变化。我们研究了当地的三种群落类型:灌丛地、红叶石楠和四叶石楠,调查时间分别为 1980 年、2003 年、2018 年和 2023 年。我们使用时间贝塔多样性指数(Temporal Beta Diversity Index)对物种组成和丰度随时间的变化进行了分析,以区分物种的增加或减少。我们调查了每次调查中的元群落结构要素--一致性、更替和边界聚类。我们观察到所有群落类型的物种组成和丰度都发生了明显的时间变化。这些时间变化源于物种和个体的损失和增加。值得注意的是,2023 年的物种出现率和丰度出现了显著下降,这可能是由于气候变化加剧了长期干旱造成的。令人惊讶的是,在我们的研究中,元群落结构始终保持克利茨型,这强调了心皮区在维持当地群落类型之间的区别方面的稳定性。这表明元群落空间结构能够抵御当地群落组成的变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Temporal beta diversity and plant metacommunity structure dynamics over a 43-year period in an inter-tropical mexican arid region

Understanding the dynamics of metacommunity structure and temporal beta diversity is vital for comprehending ecological dynamics at local and regional scales; it is essential to evaluate impacts of factors such as climate change, dispersal, and biotic interactions. We examined changes in the composition and abundance of 199 perennial plant species in the semiarid Zapotitlán Valley, Mexico, over a 43-year period. We studied three local community types, scrubland, cardonal, and tetechera, with surveys conducted in 1980, 2003, 2018, and 2023. Shifts in species composition and abundance over time were analysed using the Temporal Beta Diversity Index distinguishing between species gains or losses. We investigated the metacommunity structure elements—coherence, turnover, and boundary clumping—in each survey. We observed pronounced temporal changes in species’ composition and abundance across all community types. These temporal changes stem from the losses and gains in species and individuals. Notably, 2023 showed significant losses in species occurrence and abundance, potentially attributable to an extended drought likely exacerbated by climate change. Surprisingly, the metacommunity structure remained Clementsian throughout our study, emphasising the stability of the cardonal in maintaining distinctions between local community types. This suggests that the metacommunity spatial structure is resistant to changes in local community compositions.

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来源期刊
Journal of Arid Environments
Journal of Arid Environments 环境科学-环境科学
CiteScore
5.70
自引率
3.70%
发文量
144
审稿时长
55 days
期刊介绍: The Journal of Arid Environments is an international journal publishing original scientific and technical research articles on physical, biological and cultural aspects of arid, semi-arid, and desert environments. As a forum of multi-disciplinary and interdisciplinary dialogue it addresses research on all aspects of arid environments and their past, present and future use.
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