Defoliation and neighbouring legume plants accelerate leaf and root litter decomposition of Leymus chinensis dominating grasslands
Defoliation and neighbouring legume plants accelerate leaf and root litter decomposition of Leymus chinensis dominating grasslands
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落叶和邻近的豆科植物加速了羊草主导草原的叶和根凋落物分解
DOI：
10.1016/j.agee.2020.107074
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发表时间：
2020-10
影响因子：
6.6
通讯作者：
Deli Wang
中科院分区：
文献类型：
--
作者：
Xuxin Song;Jinting Cai;Huixian Meng;Shiwen Ding;Ling Wang;Bai Liu;Qing Chang;Xuan Zhao;Zhiqiang Li;Deli Wang
优势植物物种与来自相同或其他营养水平的其他物种（例如邻近植物和食草动物）共存，这可能会对凋落物分解产生邻近效应和落叶效应。然而，关于邻近植物物种和食草动物落叶是否以及如何相互作用影响优势物种的分解，以及叶子和根的分解是否具有类似的反应，目前还没有多少信息。在这里，我们同时检查了优势草种羊草在存在和不存在邻近植物物种五子山黧豆（一种功能不同的豆科植物）的情况下的叶子和细根凋落物的分解，并模拟了草食动物通过割草的落叶。我们发现邻近的豆科植物和落叶均显着加速了羊草叶和根凋落物的分解，并且邻近的豆科植物对凋落物分解的影响强于落叶。邻近豆科植物的积极影响发生在所有研究期间，而落叶仅在凋落物分解的前 15 天产生积极影响。邻近豆科植物和落叶对根凋落物分解产生强烈的加和效应，对叶凋落物分解产生交互作用。这些发现强调了功能不同的物种共存对于促进以草为主的草原养分循环的重要性。
Dominant plant species coexist with other species from the same or other trophic levels (e.g. neighbouring plants and herbivores), which may give rise to neighbourhood and defoliation effects on litter decomposition. Yet, little information exists on if and how neighbouring plant species and herbivore defoliation interactively affect the decomposition of dominant species, and further whether decomposition of leaves and roots has similar responses. Here, we simultaneously examined both the leaf and fine root litter decomposition of the dominant grass species,Leymus chinensis, in the presence and absence of a neighbouring plant species,Lathyrus quinquenervius(a functionally dissimilar legume species), and simulated herbivore defoliation by mowing. We found that both neighbouring legume plants and defoliation significantly accelerated both leaf and root litter decomposition of L.chinensis, and that neighbouring legume plants exerted stronger effects on litter decomposition than defoliation. The positive effects of neighbouring legume plants occurred across all study periods, whereas defoliation only had a positive effect during the first 15 days of litter decomposition. Neighbouring legume plants and defoliation exerted strong additive effects on root litter decomposition, and interactive effects on leaf litter decomposition. These findings highlight the significance of functionally dissimilar species coexistence to facilitate nutrient cycling in grasses - dominated grasslands.
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影响因子：
4.9
作者：
Kong, Deliang;Wu, Huifang;Han, Xingguo
通讯作者：
Han, Xingguo
放牧调节欧亚草原的土壤温度和湿度
影响因子：
6.2
作者：
Yuchun Yan;Ruirui Yan;Jiquan Chen;Xiaoping Xin;David J. Eldridge;Changliang Shaoa;Xu Wang;Shijie Lv;Dongyan Jin;Jinqiang Chen;Zhenjie Guo;Baorui Chena;Lijun Xu
通讯作者：
Lijun Xu
影响因子：
9.7
作者：
Porre, Rima J.;van der Werf, Wopke;Hoffland, Ellis
通讯作者：
Hoffland, Ellis
DOI：
10.1098/rspb.2007.1012
发表时间：
2007-11
期刊：
Proceedings of the Royal Society B: Biological Sciences
影响因子：
--
作者：
D. Robinson
通讯作者：
D. Robinson
影响因子：
5.2
作者：
M. Scherer‐Lorenzen
通讯作者：
M. Scherer‐Lorenzen