%0 Journal Article
%T Relationships between Soil Carbon Distribution and Species Diversityand Community Biomass at Different Alpine Meadows<br>高寒草甸不同群落类型土壤碳分布与物种多样性、生物量关系
%A WANG Changting
%A LONG Ruijun
%A LIU Wei
%A WANG Qilan
%A ZHANG Li
%A WU Pengfei
%A <br>王长庭
%A 龙瑞军
%A 刘伟
%A 王启兰
%A 张莉
%A 吴鹏飞
%J 资源科学
%D 2010
%I 
%X Soil organic carbon is a critical component in the terrestrial carbon reservoir, and itsstorage, distribution, and conversion play a major role in the globe carbon budget. Betterunderstanding the distribution pattern of soil carbon storage in different alpine meadows willfacilitate the projection of global change on the terrestrial carbon cycling. The relationship betweenbiodiversity and ecosystem functioning has aroused considerable interest and controversy in recentecological literature. Heterotrophic microbial communities inhabiting soil dictate key processesthat control the ecosystem carbon and nitrogen cycling, and they potentially represent amechanistic link between plant diversity and ecosystem functions. Measurements of different plantcommunity types and soils were used at the Haibei alpine meadow ecosystem station during theperiod 2003-2005. This study was conducted to examine characteristics of soil microbial biomasscarbon (MBC), soil organic carbon (SOC), and their relationships with productivity and diversity atdifferent alpine meadows. Results indicated that the plant diversity index (H') decreased with soiltotal organic carbon and soil microbial biomass carbon increasing. Community biomass increasedwith soil total organic carbon and MBC increasing in different alpine meadow communities. TheMBC and organic total carbon at 0-10 cm,10~20 cm, 20~40 cm, and 0~40 cm soil layer inKobresia tibetica swamp meadow were found to be 2.99, 1.78, 0.38, and 1.72 g/kg dry soil, and183.31, 78.92, 20.58, and 94.27 g/kg dry soil, respectively, which were significantly higher thanother types of meadows (p<0.01). The SOC and MBC contents decreased with increasing soildepth, exhibiting differences at the same soil depth in different type communities. There existed asignificant correlation of the two indices with soil organic and soil total N, indicating that bothSOC and MBC could be used as the important indicators to measure changes in soil quality. Thesoil resources showed a stronger positive correlation with aboveground biomass of differentgrassland type communities. Changes in microbial composition and community biomass largelyresulted from a higher level of plant production, rather than from plant diversity. It was found thatthe plant species differed in their biochemical composition. Changes in plant diversity couldsubstantially change the production, thereby controlling the composition and function ofheterotrophic microbial communities. The amounts of living plant biomass in alpine meadowcommunities affected soil microbial biomass carbon, soil organic carbon, and soil fertility. Theseresults suggest that the original soil conditions, plant community composition, and communityproductivity play an eminent role in regulating plant community productivity and microbialbiomass and activity in different alpine meadows.
%K Species diversity
%K Biomasses
%K Soil organic carbon
%K Microbial biomass carbon
%K Alpinemeadow<br>高寒草甸
%K 植物多样性
%K 生物量
%K 土壤有机碳
%K 微生物生物量碳
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=9DEEAF23637E6E9539AD99BE6ABAB2B3&aid=39DA82BB632699483D7B71FA4C8DB3AD&yid=140ECF96957D60B2&vid=9971A5E270697F23&iid=F3090AE9B60B7ED1&sid=0D1D160AB8016934&eid=8E60891DE9EC9643&journal_id=1007-7588&journal_name=资源科学&referenced_num=0&reference_num=29