Effects of plant species richness on C-13 assimilate partitioning in artificial grasslands of different established ages

NWIPB OpenIR

	Effects of plant species richness on C-13 assimilate partitioning in artificial grasslands of different established ages
	Xu, Longhua ; Yao, Buqing ; Wang, Wenying ; Wang, Fangping ; Zhou, Huakun ; Shi, Jianjun ; Zhao, Xinquan
	2017-01-09
发表期刊	SCIENTIFIC REPORTS
摘要	Artificial grasslands play a role in carbon storage on the Qinghai-Tibetan Plateau. The artificial grasslands exhibit decreased proportions of graminate and increased species richness with age. However, the effect of the graminate proportions and species richness on ecosystem C stocks in artificial grasslands have not been elucidated. We conducted an in situ C-13 pulse-labeling experiment in August 2012 using artificial grasslands that had been established for two years (2Y), five years (5Y), and twelve years (12Y). Each region was plowed fallow from severely degraded alpine meadow in the Qinghai-Tibetan Plateau. The 12Y grassland had moderate proportions of graminate and the highest species richness. This region showed more recovered C-13 in soil and a longer mean residence time, which suggests species richness controls the ecosystem C stock. The loss rate of leaf-assimilated C of the graminate-dominant plant species Elymus nutans in artificial grasslands of different ages was lowest in the 12Y grassland, which also had the highest species richness. Thus the lower loss rate of leaf-assimilated C can be partially responsible for the larger ecosystem carbon stocks in the 12Y grassland. This finding is a novel mechanism for the effects of species richness on the increase in ecosystem functioning.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/38166
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Xu, Longhua,Yao, Buqing,Wang, Wenying,et al. Effects of plant species richness on C-13 assimilate partitioning in artificial grasslands of different established ages[J]. SCIENTIFIC REPORTS,2017.
APA	Xu, Longhua.,Yao, Buqing.,Wang, Wenying.,Wang, Fangping.,Zhou, Huakun.,...&Zhao, Xinquan.(2017).Effects of plant species richness on C-13 assimilate partitioning in artificial grasslands of different established ages.SCIENTIFIC REPORTS.
MLA	Xu, Longhua,et al."Effects of plant species richness on C-13 assimilate partitioning in artificial grasslands of different established ages".SCIENTIFIC REPORTS (2017).