Plant height bridges hierarchical community responses to nitrogen enrichment

IF 5.3 1区 环境科学与生态学 Q1 ECOLOGY Journal of Ecology Pub Date : 2024-08-05 DOI:10.1111/1365-2745.14381
Jiaqiang Liao, Quan Quan, Fangfang Ma, Jinlong Peng, Shuli Niu
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植物高度为群落对氮富集的分级响应架起了桥梁
氮富集通过改变不同层次的群落过程来影响生态系统的生产力,这些过程包括单个物种性状的反应、物种重新排序以及最终的物种更替。以前的大多数研究都侧重于分别研究这些过程的反应,但很少有人研究群落的分级反应是如何相互联系并促成生产力的变化的。为了填补这一知识空白,我们进行了一项为期 4 年的氮添加野外实验,以研究高山草甸生态系统中地上净初级生产力(ANPP)的群落分级响应。我们发现,在 4 年的实验中,单个物种的反应对氮添加下的净初级生产力变化贡献更大,而物种重排和物种更替的贡献很小。其中,植株高度是最终解释和弥合不同群落水平上氮素添加对ANPP影响的关键性状。氮添加促进了植株高度和单个物种的生长,并通过增加较高的禾本科植物和莎草,减少较矮的草本植物和豆科植物,对功能群进行了重新排序。物种更替对 ANPP 变化的影响较弱,这是因为失去和增加的物种生物量都较低。最后,较高的宿根植物在增加氮素后对ANPP的促进作用更大。综述。这项研究提供了一个新的视角,说明生态系统生产力如何以与植物高度相关的分层方式对氮素富集做出响应,这有助于阐明复杂的群落过程,并建立植物性状与生态系统功能之间的直接联系。
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来源期刊
Journal of Ecology
Journal of Ecology 环境科学-生态学
CiteScore
10.90
自引率
5.50%
发文量
207
审稿时长
3.0 months
期刊介绍: Journal of Ecology publishes original research papers on all aspects of the ecology of plants (including algae), in both aquatic and terrestrial ecosystems. We do not publish papers concerned solely with cultivated plants and agricultural ecosystems. Studies of plant communities, populations or individual species are accepted, as well as studies of the interactions between plants and animals, fungi or bacteria, providing they focus on the ecology of the plants. We aim to bring important work using any ecological approach (including molecular techniques) to a wide international audience and therefore only publish papers with strong and ecological messages that advance our understanding of ecological principles.
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