Litter species traits, but not richness, contribute to carbon and nitrogen dynamics in an alpine meadow on the Tibetan Plateau

	Litter species traits, but not richness, contribute to carbon and nitrogen dynamics in an alpine meadow on the Tibetan Plateau
	Jiang, Jing 1,5; Li, Yikang 2; Wang, Mozhu 3; Zhou, Caiping 1; Cao, Guangmin 2; Shi, Peili 4; Song, Minghua 1
刊名	plant and soil
	2013-12-01
卷号	373 期号:1-2 页码:931-941
关键词	Litter N content CO2-C emission Net N mineralization Functional diversity Microbial biomass C and N Additive and non-additive effects
ISSN号	0032-079x
通讯作者	song, mh (reprint author), chinese acad sci, key lab ecosyst network observat & modeling, inst geog sci & nat resources res, a11 datun rd, beijing 100101, peoples r china.
中文摘要	litter, as afterlife of plants, plays an important role in driving belowground decomposition processes. here we tested effects of litter species identity and diversity on carbon (c) and nitrogen (n) dynamics during litter decomposition in n-limited alpine meadow soil from the qinghai-tibet plateau. we incubated litters of four meadow species, a sedge ("s", kobresia humilis), a grass ("g", elymus nutans), a herb ("h", saussurea superba), and a legume ("l", oxytropis falcata), in monoculture and in mixture with meadow soil. co2 release was measured 21 times during the incubation, and soil available n and microbial biomass c and n were measured before and after the experiment. the organic c decay rate did not differ much among soils amended with monocultures or mixtures of litter, except in the h, s, l, and s+h treatments, which had much higher decay rates. potential decomposable c pools were lowest in the control, highest in the l treatment, and intermediate in the s treatment. mineralized n was completely immobilized by soil microbes in all treatments except the control, s+l, and s+g+l treatments. litter mixtures had both additive and non-additive effects on co2-c emission (mainly antagonistic effects), net n mineralization (mainly synergistic), and microbial biomass c and n (both). overall, these parameters were not significantly correlated with litter species richness. similarly, microbial c or n was not significantly correlated with litter n content or c/n. however, cumulative co2-c emission and net n mineralization were positively correlated with litter n content and negatively correlated with litter c/n. litter n content and c/n rather than litter species richness drove the release of co2-c and net available n in this ecosystem. the antagonistic effects of litter mixtures contributed to a modest release of co2-c, but their synergistic effects enhanced net available n. we suggest that in alpine meadow communities, balancing species with high and low n contents will benefit soil carbon sequestration and plant competition for available n with soil microbes.
英文摘要	litter, as afterlife of plants, plays an important role in driving belowground decomposition processes. here we tested effects of litter species identity and diversity on carbon (c) and nitrogen (n) dynamics during litter decomposition in n-limited alpine meadow soil from the qinghai-tibet plateau.
WOS标题词	science & technology ; life sciences & biomedicine
类目[WOS]	agronomy ; plant sciences ; soil science
研究领域[WOS]	agriculture ; plant sciences
关键词[WOS]	microbial biomass nitrogen ; leaf-litter ; ecosystem function ; decomposition processes ; forest ecosystems ; direct extraction ; nutrient release ; plant diversity ; soil-nitrogen ; biodiversity
收录类别	SCI
语种	英语
WOS记录号	WOS:000327400400066
公开日期	2014-05-09
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/3895]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 2.Chinese Acad Sci, Northwest Inst Plateau Biol, Xining 810008, Qinghai, Peoples R China 3.Beijing Forestry Univ, Sch Forestry, Beijing 100083, Peoples R China 4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Lhasa Natl Ecol Res Stn, Beijing 100101, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Jing,Li, Yikang,Wang, Mozhu,et al. Litter species traits, but not richness, contribute to carbon and nitrogen dynamics in an alpine meadow on the Tibetan Plateau[J]. plant and soil,2013,373(1-2):931-941.
APA	Jiang, Jing.,Li, Yikang.,Wang, Mozhu.,Zhou, Caiping.,Cao, Guangmin.,...&Song, Minghua.(2013).Litter species traits, but not richness, contribute to carbon and nitrogen dynamics in an alpine meadow on the Tibetan Plateau.plant and soil,373(1-2),931-941.
MLA	Jiang, Jing,et al."Litter species traits, but not richness, contribute to carbon and nitrogen dynamics in an alpine meadow on the Tibetan Plateau".plant and soil 373.1-2(2013):931-941.