Arid
DOI10.1016/j.catena.2016.03.002
No synergistic effects of water and nitrogen addition on soil microbial communities and soil respiration in a temperate desert
Su, Yan Gui1; Huang, Gang2; Lin, Ya Jun1,3; Zhang, Yuan Ming1
通讯作者Zhang, Yuan Ming
来源期刊CATENA
ISSN0341-8162
EISSN1872-6887
出版年2016
卷号142页码:126-133
英文摘要

Soil microbial communities play an important role in regulating land atmosphere CO2 exchange in terrestrial ecosystems. However, their responses to climate change are unclear. We explored the effects of water and nitrogen addition and their interaction on soil microbes and the resulting impacts on soil carbon emissions in the Gurbantunggut Desert, northwestern China. A manipulative 30% increase in precipitation and 5 gN m(-2) year(-1) deposition alone and in combination was applied across three years from 2011 to 2013. Water addition significantly increased microbial biomass and respiration, metabolic quotient, and the utilization of carbohydrates, carboxylic acids and amino acids. Water addition did not change the microbial community composition. Nitrogen addition only significantly increased soil bacterial PLFAs, while exerting no significant impacts on soil fungal PLFAs, microbial respiration and soil respiration. Moreover, nitrogen addition had no significant impacts on microbial community composition. Water and nitrogen addition in combination did not generate synergistic effects on microbial communities and soil respiration. Across treatments in three years, soil respiration and microbial respiration were positively correlated with microbial total PLFAs, microbial carbon utilization profiles, while being independent of microbial community structure. This study suggests water addition can increase soil carbon emission through increasing microbial utilization of labile carbon, and water plus nitrogen addition had no synergistic effects on soil microbial communities and soil respiration, demonstrating nitrogen is not a limiting factor for soil microbial communities in the scenario of increasing precipitation in this desert ecosystem. (C) 2016 Elsevier B.V. All rights reserved.


英文关键词Climate change Microbial biomass Microbial community composition Microbial respiration Temperate desert
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000376714200011
WOS关键词ECOSYSTEM CARBON EXCHANGE ; FATTY-ACID PROFILES ; INCREASED PRECIPITATION ; ALTERED PRECIPITATION ; SUBSTRATE UTILIZATION ; FUNCTIONAL DIVERSITY ; EPHEMERAL PLANTS ; USE EFFICIENCY ; RESPONSES ; BIOMASS
WOS类目Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向Geology ; Agriculture ; Water Resources
来源机构中国科学院新疆生态与地理研究所
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/191987
作者单位1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Biogeog & Bioresource Arid Land, South Beijing Rd 818, Xinjiang 830011, Peoples R China;
2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, South Beijing Rd 818, Xinjiang 830011, Peoples R China;
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Su, Yan Gui,Huang, Gang,Lin, Ya Jun,et al. No synergistic effects of water and nitrogen addition on soil microbial communities and soil respiration in a temperate desert[J]. 中国科学院新疆生态与地理研究所,2016,142:126-133.
APA Su, Yan Gui,Huang, Gang,Lin, Ya Jun,&Zhang, Yuan Ming.(2016).No synergistic effects of water and nitrogen addition on soil microbial communities and soil respiration in a temperate desert.CATENA,142,126-133.
MLA Su, Yan Gui,et al."No synergistic effects of water and nitrogen addition on soil microbial communities and soil respiration in a temperate desert".CATENA 142(2016):126-133.
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