局部养分添加导致全球草原植物多样性丧失，但不会导致生物同质化。

Local nutrient addition drives plant diversity losses but not biotic homogenization in global grasslands.

作者信息

Chen Qingqing, Blowes Shane A, Harpole W Stanley, Ladouceur Emma, Borer Elizabeth T, MacDougall Andrew, Martina Jason P, Bakker Jonathan D, Tognetti Pedro M, Seabloom Eric W, Daleo Pedro, Power Sally, Roscher Christiane, Adler Peter B, Donohue Ian, Wheeler George, Stevens Carly, Veen G F Ciska, Risch Anita C, Wardle Glenda M, Hautier Yann, Estrada Catalina, Hersch-Green Erika, Niu Yujie, Peri Pablo L, Eskelinen Anu, Gruner Daniel S, Olde Venterink Harry, D'Antonio Carla, Cadotte Marc W, Haider Sylvia, Eisenhauer Nico, Catford Jane, Virtanen Risto, Morgan John W, Tedder Michelle, Bagchi Sumanta, Caldeira Maria C, Bugalho Miguel N, Knops Johannes M H, Dickman Chris R, Hagenah Nicole, Jentsch Anke, Macek Petr, Osborne Brooke B, Laanisto Lauri, Chase Jonathan M

机构信息

German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstraße 4, 04103, Leipzig, Germany.

Senckenberg Museum for Natural History Görlitz, D-02826, Görlitz, Germany.

出版信息

Nat Commun. 2025 May 27;16(1):4903. doi: 10.1038/s41467-025-59166-7.

DOI:10.1038/s41467-025-59166-7

PMID:40425533

Abstract

Nutrient enrichment typically causes local plant diversity declines. A common but untested expectation is that nutrient enrichment also reduces variation in nutrient conditions among localities and selects for a smaller pool of species, causing greater diversity declines at larger than local scales and thus biotic homogenization. Here we apply a framework that links changes in species richness across scales to changes in the numbers of spatially restricted and widespread species for a standardized nutrient addition experiment across 72 grasslands on six continents. Overall, we find proportionally similar species loss at local and larger scales, suggesting similar declines of spatially restricted and widespread species, and no biotic homogenization after 4 years and up to 14 years of treatment. These patterns of diversity changes are generally consistent across species groups. Thus, nutrient enrichment poses threats to plant diversity, including for widespread species that are often critical for ecosystem functions.

摘要

养分富集通常会导致当地植物多样性下降。一个常见但未经检验的预期是，养分富集还会减少不同地点间养分条件的差异，并选择较小的物种库，从而在大于局部尺度上导致更大幅度的多样性下降，进而造成生物同质化。在此，我们应用一个框架，将跨尺度物种丰富度的变化与空间受限和分布广泛物种数量的变化联系起来，该框架基于一项在六大洲72个草原上进行的标准化养分添加实验。总体而言，我们发现在局部和更大尺度上物种损失比例相似，这表明空间受限和分布广泛的物种下降幅度相似，并且在4年至长达14年的处理后未出现生物同质化现象。这些多样性变化模式在不同物种组中总体一致。因此，养分富集对植物多样性构成威胁，包括对那些通常对生态系统功能至关重要的广泛分布物种。