Asynchronous responses of soil microbial community and understory plant community to simulated nitrogen deposition in a subtropical forest.
Asynchronous responses of soil microbial community and understory plant community to simulated nitrogen deposition in a subtropical forest.
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亚热带森林土壤微生物群落和林下植物群落对模拟氮沉降的异步响应
DOI：
10.1002/ece3.750
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发表时间：
2013-10
影响因子：
2.6
通讯作者：
Ji, Chunfeng
中科院分区：
文献类型：
--
作者：
Wu, Jianping;Liu, Wenfei;Fan, Houbao;Huang, Guomin;Wan, Songze;Yuan, Yinghong;Ji, Chunfeng
大气氮（N）沉降极大地影响生态系统过程和特性。然而，很少有研究同时考察地上和地下群落对氮沉降的响应。在这里，我们研究了 8 年的模拟氮沉降对亚热带森林土壤微生物群落和植物多样性的影响。添加的实验氮量（N m−2 年−1 克）和处理代码为 0（N0，对照）、6（N1）、12（N2）和 24（N3）。磷脂脂肪酸（PLFA）分析用于表征土壤微生物群落，同时在永久田间地块中确定植物多样性和覆盖度。 N3 处理降低了微生物丰度，N2 和 N3 处理降低了植物物种丰富度和覆盖度。植物物种丰富度的下降与丛枝菌根真菌丰度的减少、细菌胁迫指数的增加和土壤 pH 值的降低有关。与植物群落相比，土壤微生物群落的可塑性更可能与处理间的不同反应相关。这些结果表明，长期氮沉降对林下植物群落的影响大于对土壤微生物群落的影响，应考虑不同的保护策略。
Atmospheric nitrogen (N) deposition greatly affects ecosystem processes and properties. However, few studies have simultaneously examined the responses of both the above- and belowground communities to N deposition. Here, we investigated the effects of 8 years of simulated N deposition on soil microbial communities and plant diversity in a subtropical forest. The quantities of experimental N added (g of N m−2 year−1) and treatment codes were 0 (N0, control), 6 (N1), 12 (N2), and 24 (N3). Phospholipid fatty acids (PLFAs) analysis was used to characterize the soil microbial community while plant diversity and coverage were determined in the permanent field plots. Microbial abundance was reduced by the N3 treatment, and plant species richness and coverage were reduced by both N2 and N3 treatments. Declines in plant species richness were associated with decreased abundance of arbuscular mycorrhizal fungi, increased bacterial stress index, and reduced soil pH. The plasticity of soil microbial community would be more related to the different responses among treatments when compared with plant community. These results indicate that long-term N deposition has greater effects on the understory plant community than on the soil microbial community and different conservation strategies should be considered.
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影响因子：
2.2
作者：
He, FL;Barclay, HJ
通讯作者：
Barclay, HJ
影响因子：
9.7
作者：
Bååth, E;Anderson, TH
通讯作者：
Anderson, TH
影响因子：
3.7
作者：
Fan, HB;Hong, W
通讯作者：
Hong, W
影响因子：
11.6
作者：
Högberg, P;Fan, HB;Tamm, CO
通讯作者：
Tamm, CO
影响因子：
3.7
作者：
Frey, SD;Knorr, M;Simpson, RT
通讯作者：
Simpson, RT