REPLY TO YANG ET AL.: Coastal wetlands are not well represented by protected areas for endangered birds

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	REPLY TO YANG ET AL.: Coastal wetlands are not well represented by protected areas for endangered birds
	Lu, Fei; Xu, Weihua; Xiao, Yi; Zhang, Jingjing; Yang, Wu; Zhang, Lu; Hull, Vanessa; Wang, Zhi; Zheng, Hua; Liu, Jianguo
刊名	PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
	2017-07-11
卷号	114 期号:28 页码:E5493-E5493
关键词	Glycosidase Activity Meta-analysis Nitrogen Addition Soil Respiration Soil Type Vegetation Type
英文摘要	Unprecedented levels of nitrogen (N) have been deposited in ecosystems over the past century, which is expected to have cascading effects on microbially mediated soil respiration (SR). Extracellular enzymes play critical roles on the degradation of soil organic matter, and measurements of their activities are potentially useful indicators of SR. The links between soil extracellular enzymatic activities (EEAs) and SR under N addition, however, have not been established. We therefore conducted a meta-analysis from 62 publications to synthesize the responses of soil EEAs and SR to elevated N. Nitrogen addition significantly increased glycosidase activity (GA) by 13.0%, alpha-1,4-glucosidase (AG) by 19.6%, beta-1,4-glucosidase (BG) by 11.1%, beta-1,4-xylosidase (BX) by 21.9% and beta-D-cellobiosidase (CBH) by 12.6%. Increases in GA were more evident for long duration, high rate, organic and mixed N addition (combination of organic and inorganic N addition), as well as for studies from farmland. The response ratios (RRs) of GA were positively correlated with the SR-RRs, even when evaluated individually for AG, BG, BX and CBH. This positive correlation between GA-RR and SR-RR was maintained for most types of vegetation and soil as well as for different methods of N addition. Our results provide the first evidence that GA is linked to SR under N addition over a range of ecosystems and highlight the need for further studies on the response of other soil EEAs to various global change factors and their implications for ecosystem functions.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39088]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Lu, Fei,Xu, Weihua,Xiao, Yi,et al. REPLY TO YANG ET AL.: Coastal wetlands are not well represented by protected areas for endangered birds[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2017,114(28):E5493-E5493.
APA	Lu, Fei.,Xu, Weihua.,Xiao, Yi.,Zhang, Jingjing.,Yang, Wu.,...&Ouyang, Zhiyun.(2017).REPLY TO YANG ET AL.: Coastal wetlands are not well represented by protected areas for endangered birds.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,114(28),E5493-E5493.
MLA	Lu, Fei,et al."REPLY TO YANG ET AL.: Coastal wetlands are not well represented by protected areas for endangered birds".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 114.28(2017):E5493-E5493.