The response of coarse woody debris decomposition and microbial community to nutrient additions in a subtropical forest
The response of coarse woody debris decomposition and microbial community to nutrient additions in a subtropical forest
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亚热带森林粗木屑分解和微生物群落对养分添加的响应
DOI：
10.1016/j.foreco.2019.117799
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发表时间：
2020-03
影响因子：
3.7
通讯作者：
Liu Yuanqiu
中科院分区：
文献类型：
--
作者：
Wu Chunsheng;Zhang Zhijian;Shu Chunjie;Mo Qifeng;Wang Hankun;Kong Fanqian;Zhang Yi;Wang G. Geoff;Liu Yuanqiu
粗木质碎屑(CWD)在森林碳库中占有相当大的比例，在森林碳库动态中起着重要作用。因此，了解控制CWD分解的因素对于评估森林碳库的变化至关重要。本研究在亚热带森林中进行了因子施肥试验，研究了磷(P)和氮(N)有效性对两种树种(柳杉和白杨)CWD分解的影响。我们还利用磷脂脂肪酸(PLFAs)的方法表征了不同施肥处理下CWD的微生物群落。结果表明，氮肥、磷肥和氮肥+磷肥可使干湿重呼吸增加51.4-257.4%，且增加幅度因种而异。在两个物种之间，PL的RCWD显著高于CR。在分解过程中，施P或N+P处理导致两个树种CWD中N和P的显著积累。N+P处理对腐解CWD的微生物生长影响最大，尤其对真菌和AMF的影响最大，P处理对细菌生长影响最大。我们的研究表明，磷的有效性是CWD分解的主要限制因素，N的添加不会加剧P的限制。真菌和细菌的平衡也可能决定腐烂过程中额外营养物质的释放。为了确定我们的结果是否普遍适用于亚热带森林，未来的研究应该测试更多的树种，它们的CWD处于不同的分解阶段。
Coarse woody debris (CWD) plays an important role in forest C dynamics because it contains a sizeable proportion of total forest C. Understanding the factors controlling CWD decomposition is hence critical to assessing changes in forest C storage. In this study, we conducted a factorial fertilization experiment in a subtropical forest to investigate the influence of phosphorus (P) and nitrogen (N) availability on CWD decomposition of two species (Cryptomeria japonica(CR) andPlatycarya strobilacea(PL)). We also characterized the microbial community of each CWD under different fertilization treatments using the method of phospholipid fatty acids (PLFAs). We found that fertilization with N, P, and N + P increased CWD respiration (RCWD) by 51.4–257.4%, and the magnitude of increase was species-specific. Between the two species, the RCWDof PL was significantly higher than that of CR. During the decomposition process, fertilization with P or N + P resulted in a significant accumulation of N and P in the CWD of both studied species. While N + P treatment resulted in the highest microbial growth of the decomposing CWD, especially for fungi and AMF, P treatment resulted in the highest bacterial growth. Our study indicated that P availability was the primary constraint of CWD decomposition, and N addition did not exacerbate P limitation. The balance of fungal and bacterial might also determine the release of additional nutrients during the decomposition period. To determine whether our results are generally applicable to subtropical forests, future studies should test more tree species with their CWDs in different stages of decomposition.
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影响因子：
2.9
作者：
Chunsheng Wu;Xiaohua Wei;Qifeng Mo;Qinglin Li;Xiaodong Li;Chunjie Shu;Liangying Liu;Yuan-qiu Liu-Yuan-qi
通讯作者：
Chunsheng Wu;Xiaohua Wei;Qifeng Mo;Qinglin Li;Xiaodong Li;Chunjie Shu;Liangying Liu;Yuan-qiu Liu-Yuan-qi
影响因子：
3.7
作者：
Chunsheng Wu;Zhijian Zhang;Hankun Wang;Guoxian Huang;Chunjie Shu;Fanqian Kong;Yi Zhang;G. Wang;Yuan-qiu Liu
通讯作者：
Chunsheng Wu;Zhijian Zhang;Hankun Wang;Guoxian Huang;Chunjie Shu;Fanqian Kong;Yi Zhang;G. Wang;Yuan-qiu Liu
影响因子：
2.7
作者：
Bebber, Daniel P.;Watkinson, Sarah C.;Darrah, Peter R.
通讯作者：
Darrah, Peter R.
影响因子：
9.7
作者：
Henriksen, TM;Breland, TA
通讯作者：
Breland, TA
影响因子：
4
作者：
Chambers, JQ;Schimel, JP;Nobre, AD
通讯作者：
Nobre, AD