Characteristics of nitrogen deposition research within grassland ecosystems globally and its insight from grassland microbial community changes in China

作者：Tong Li, Lizhen Cui, Lilan Liu, Hui Wang, Junfu Dong, Fang Wang, Xiufang Song, Rongxiao Che, Congjia Li, Tang Li, Zhihong Xu, Yanfen Wang, Jianqing Du, Yanbin Hao, Xiaoyong Cui · 发表于：Frontiers in Plant Science · 年份：2022 · DOI：10.3389/fpls.2022.947279 · 被引用次数：19 · 研究领域：Microbial Community Ecology and Physiology、Soil Carbon and Nitrogen Dynamics、Peatlands and Wetlands Ecology

As global change continues to intensify, the mode and rate of nitrogen input from the atmosphere to grassland ecosystems had changed dramatically. Firstly, we conducted a systematic analysis of the literature on the topic of nitrogen deposition impacts over the past 30 years using a bibliometric analysis. A systematic review of the global research status, publication patterns, research hotspots and important literature. We found a large number of publications in the Chinese region, and mainly focuses on the field of microorganisms. Secondly, we used a meta-analysis to focus on microbial changes using the Chinese grassland ecosystem as an example. The results show that the research on nitrogen deposition in grassland ecosystems shows an exponential development trend, and the authors and research institutions of the publications are mainly concentrated in China, North America, and Western Europe. The keyword clustering results showed 11 important themes labeled climate change, elevated CO 2 , species richness and diversity, etc. in these studies. The burst keyword analysis indicated that temperature sensitivity, microbial communities, etc. are the key research directions. The results of the meta-analysis found that nitrogen addition decreased soil microbial diversity, and different ecosystems may respond differently. Treatment time, nitrogen addition rate, external environmental conditions, and pH had major effects on microbial alpha diversity and biomass. The loss of microbial...