植物硅含量是了解植物群落特性和生态系统结构的替代物

IF 2.7 3区 环境科学与生态学 Q2 ECOLOGY Ecosphere Pub Date : 2024-07-28 DOI:10.1002/ecs2.4907
Renan Fernandes Moura, Marcelo Sternberg, Chanania Vorst, Ofir Katz
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摘要

植物组织中的硅(Si)含量被认为是一种功能性特征,可为植物个体带来多种形态-生理益处。然而,这些个体益处是否以及如何扩展到植物群落过程和生态系统功能,目前仍不清楚。在此,我们研究了植物硅含量与植物群落特性和以色列草本群落生态系统结构的关系。我们对地中海和沙漠生态系统的 15 个地点进行了采样,并建立了模型来评估植物硅含量(群落加权平均值和标准变异)与物种丰富度、生物量产量、植物覆盖率和功能多样性等变量之间的关联。最后,我们使用模型选择技术来检验描述植物硅含量的模型是否比使用土壤硅数据的模型表现更好。干旱易感性较低的地点具有明显更多的硅积累草种和更高的土壤硅含量。使用植物含硅量而非土壤含硅量建立的模型总是表现更好,尽管考虑含硅量变化的模型与群落属性的关联性总体上比仅考虑平均含硅量的模型更强。例如,高达 51% 的植物含硅量变化是由气候、生物量产量和物种丰富度共同解释的。不过,植物平均含硅量和植物覆盖度加起来最多只能解释 42% 的植物功能多样性。我们的研究结果表明,植物含硅量可作为了解干旱和地中海生态系统生态特性和功能的替代物。然而,在其他生态系统类型中,硅的重要性还没有得到充分探讨,与本研究中的生态系统相比,硅在这些生态系统中的影响可能没有那么明显。鉴于各种全球变化情景,加强我们对作为植物功能特性的硅的了解有助于弥补现有的知识差距和改进生态建模,从而更准确地预测植物分布的变化。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Plant silicon content as a proxy for understanding plant community properties and ecosystem structure

Silicon (Si) content in plant tissues is considered a functional trait that can provide multiple morpho-physiological benefits to plant individuals. However, it is still unclear whether and how these individual benefits extend to plant community processes and ecosystem functioning. Here we investigated how plant Si content is associated with plant community properties and the ecosystem structure of herbaceous communities in Israel. We sampled 15 sites across the Mediterranean and desert ecosystems and built models to evaluate how plant silicon content (community-weighted mean and standard variation) is associated with variables such as species richness, biomass production, plant cover, and functional diversity. Finally, we used model selection techniques to test whether models depicting plant Si content perform better than models using data on soil Si instead. Sites with lower susceptibility to drought had significantly more Si-accumulating grass species and higher soils Si content. Models with plant Si content instead of soil Si, always performed better, although those considering Si content variation had overall stronger associations with community properties than only mean Si content. For instance, up to 51% of plant Si content variation was explained by climate, biomass production, and species richness, combined. Still, mean plant Si content and plant cover combined explained up to 42% of plant functional diversity. Our results suggest the that plant Si content serves as a proxy for understanding the ecological properties and functioning of arid and Mediterranean ecosystems. Nevertheless, the significance of Si has not been fully explored in other ecosystem types, where its influence may be less pronounced compared with the ecosystems examined in this study. In light of various global change scenarios, enhancing our understanding of Si as a plant functional trait could help bridge existing knowledge gaps and improve ecological modeling, thus enabling more accurate forecasts of changes in plant distributions.

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来源期刊
Ecosphere
Ecosphere ECOLOGY-
CiteScore
4.70
自引率
3.70%
发文量
378
审稿时长
15 weeks
期刊介绍: The scope of Ecosphere is as broad as the science of ecology itself. The journal welcomes submissions from all sub-disciplines of ecological science, as well as interdisciplinary studies relating to ecology. The journal''s goal is to provide a rapid-publication, online-only, open-access alternative to ESA''s other journals, while maintaining the rigorous standards of peer review for which ESA publications are renowned.
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