Seasonal and interannual dynamics of soil microbial biomass and available nitrogen in an alpine meadow in the eastern part of Qinghai-Tibet Plateau, China

doi:10.5194/bg-15-567-2018

CORC > 成都生物研究所 > 中国科学院成都生物研究所 > 生物多样性与生态系统服务领域 > 中国科学院山地生态恢复与生物资源利用重点实验室

	Seasonal and interannual dynamics of soil microbial biomass and available nitrogen in an alpine meadow in the eastern part of Qinghai-Tibet Plateau, China
	Xu, Bo 1,3; Wang, Jinniu 1,2; Wu, Ning 1,2; Wu, Yan 1,2; Shi, Fusun 1,2
刊名	BIOGEOSCIENCES
	2018
卷号	15 期号:2 页码:567-579
ISSN号	1726-4170
DOI	10.5194/bg-15-567-2018
产权排序	1
文献子类	Article
英文摘要	Soil microbial activity varies seasonally in frozen alpine soils during cold seasons and plays a crucial role in available N pool accumulation in soil. The intra- and interannual patterns of microbial and nutrient dynamics reflect the influences of changing weather factors, and thus provide important insights into the biogeochemical cycles and ecological functions of ecosystems. We documented the seasonal and interannual dynamics of soil microbial and available N in an alpine meadow in the eastern part of Qinghai-Tibet Plateau, China, between April 2011 and October 2013. Soil was collected in the middle of each month and analyzed for water content, microbial biomass C (MBC) and N (MBN), dissolved organic C and N, and inorganic N. Soil microbial community composition was measured by the dilutionplate method. Fungi and actinomycetes dominated the microbial community during the nongrowing seasons, and the proportion of bacteria increased considerably during the early growing seasons. Trends of consistently increasing MBC and available N pools were observed during the nongrowing seasons. MBC sharply declined during soil thaw and was accompanied by a peak in available N pool. Induced by changes in soil temperatures, significant shifts in the structures and functions of microbial communities were observed during the winter-spring transition and largely contributed to microbial reduction. The divergent seasonal dynamics of different N forms showed a complementary nutrient supply pattern during the growing season. Similarities between the interannual dynamics of microbial biomass and available N pools were observed, and soil temperature and water conditions were the primary environmental factors driving interannual fluctuations. Owing to the changes in climate, seasonal soil microbial activities and nutrient supply patterns are expected to change further, and these changes may have crucial implications for the productivity and biodiversity of alpine ecosystems.
学科主题	Environment ; Ecology
URL标识	查看原文
WOS关键词	FREEZE-THAW CYCLES ; LOW ARCTIC TUNDRA ; INORGANIC NITROGEN ; COMMUNITY STRUCTURE ; CARBON TURNOVER ; CLIMATE-CHANGE ; LATE WINTER ; SNOW ; ECOSYSTEM ; MINERALIZATION
WOS研究方向	Environmental Sciences & Ecology ; Geology
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000423506700003
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/30864]
专题	生物多样性与生态系统服务领域_中国科学院山地生态恢复与生物资源利用重点实验室
作者单位	1.Chinese Acad Sci, Chengdu Inst Biol, Chengdu 610041, Sichuan, Peoples R China; 2.Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration Biodiversity Conservation Key Laboratory of Sichuan Province, Chinese Academy of Sciences, Chengdu 610041, China 3.Aba Teachers Univ, Coll Resources & Environm, Aba 623002, Sichuan, Peoples R China;
推荐引用方式 GB/T 7714	Xu, Bo,Wang, Jinniu,Wu, Ning,et al. Seasonal and interannual dynamics of soil microbial biomass and available nitrogen in an alpine meadow in the eastern part of Qinghai-Tibet Plateau, China[J]. BIOGEOSCIENCES,2018,15(2):567-579.
APA	Xu, Bo,Wang, Jinniu,Wu, Ning,Wu, Yan,&Shi, Fusun.(2018).Seasonal and interannual dynamics of soil microbial biomass and available nitrogen in an alpine meadow in the eastern part of Qinghai-Tibet Plateau, China.BIOGEOSCIENCES,15(2),567-579.
MLA	Xu, Bo,et al."Seasonal and interannual dynamics of soil microbial biomass and available nitrogen in an alpine meadow in the eastern part of Qinghai-Tibet Plateau, China".BIOGEOSCIENCES 15.2(2018):567-579.