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	Effects of short-term grazing exclusion on plant phenology and reproductive succession in a Tibetan alpine meadow
	Zhu J. T.; Zhang, Y. J.; Liu, Y. J.
	2016
关键词	inner mongolian steppe soil organic-carbon litter decomposition nitrogen addition climate-change warming world grassland responses storage plateau
英文摘要	Grazing exclusion (GE) has been widely considered as an effective avenue for restoring degraded grasslands throughout the world. GE, via modifying abiotic and biotic environments, inevitably affects phenological development. A five-year manipulative experiment was conducted in a Tibetan alpine meadow to examine the effects of GE on phenological processes and reproductive success. The study indicated that GE strongly affected phenological development of alpine plant species. Specifically, the low-growing, shallow-rooted species (LSS), such as Kobresia pygmaea, are more sensitive to GE-caused changes on upper-soil moisture and light. GE advanced each phonological process of K. pygmaea, except in the case of the treatment of fencing for 5 years (F5), which postponed the reproductive stage and lowered the reproductive success of K. pygmaea. Increased soil moisture triggered by GE, especially in the upper soil, may stimulate growth of LSS. However, the thick litter layer under the F5 treatment can influence the photoperiod of LSS, resulting in suppression of its reproductive development. These findings indicate that plant traits associated with resource acquisition, such as rooting depth and plant height, mediate plant phenology and reproductive responses to grazing exclusion treatments.
出处	Scientific Reports
卷	6
语种	英语
ISSN号	2045-2322
DOI标识	10.1038/srep27781
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/42855]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhu J. T.,Zhang, Y. J.,Liu, Y. J.. Effects of short-term grazing exclusion on plant phenology and reproductive succession in a Tibetan alpine meadow. 2016.

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