气候变化领域集成服务门户(CCPortal): Seed rain and its relationship with above-ground vegetation of degraded Kobresia meadows

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DOI	10.1007/s10265-012-0498-2
	Seed rain and its relationship with above-ground vegetation of degraded Kobresia meadows
	Shang, Zhan-Huan; Yang, Shi-Hai; Shi, Jian-Jun; Wang, Yan-Long; Long, Rui-Jun
通讯作者	Shang, ZH (通讯作者)
发表日期	2013
ISSN	0918-9440
EISSN	1618-0860
起始页码	63
结束页码	72
卷号	126 期号:1
英文摘要	Seed rain is a crucial element in vegetation regeneration, but has been rarely studied in high altitude regions, particularly degraded Kobresia meadow. Weed infestation is a distinctive feature of pasture degradation in Kobresia meadows on the Tibetan plateau, the ecological mechanism of which is closely related with vegetation's seed rain. In this paper we assess the effect of vegetation degradation on seed rain and consider its implication for restoration of degraded Kobresia meadows in the headwater area of Yellow river, through analysis of seed species composition, number of seeds landing per m(2) of soil surface, and their relationship with above ground vegetation. Vegetation degradation had an impact on the species composition and numbers of seeds in seed rain and their relationship with above-ground vegetation. Within the un-degraded meadow, which provided a closed vegetation cover, 35 % of the seed rain was of sedge and gramineae species. However, within the degraded meadows, as the extent of degradation increased, so the total number of seeds m(-2) increased, with those derived from sedge and gramineae species forming a declining proportion of the total. Degradation of Kobresia meadow on the Tibetan plateau is exacerbated by the seed input of weed species (such as Oxytropis ochrocephala, Carum carvi, Aconitum pendulum, Pedicularis kansuensis in this study). Therefore, a major priority for the restoration of such degraded meadows should be the elimination of these weeds from the above ground vegetation by human intervention.
关键词	BLACK SOIL LAND TIBETAN PLATEAU ALPINE MEADOW FOREST DISTURBANCE BANK PERSISTENCE GRASSLAND COMMUNITY CHINA
英文关键词	Seed rain; Vegetation degradation; Kobresia meadow; Weeds infestation; Tibetan plateau
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:000312783200007
来源期刊	JOURNAL OF PLANT RESEARCH
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258142
推荐引用方式 GB/T 7714	Shang, Zhan-Huan,Yang, Shi-Hai,Shi, Jian-Jun,et al. Seed rain and its relationship with above-ground vegetation of degraded Kobresia meadows[J]. 中国科学院青藏高原研究所,2013,126(1).
APA	Shang, Zhan-Huan,Yang, Shi-Hai,Shi, Jian-Jun,Wang, Yan-Long,&Long, Rui-Jun.(2013).Seed rain and its relationship with above-ground vegetation of degraded Kobresia meadows.JOURNAL OF PLANT RESEARCH,126(1).
MLA	Shang, Zhan-Huan,et al."Seed rain and its relationship with above-ground vegetation of degraded Kobresia meadows".JOURNAL OF PLANT RESEARCH 126.1(2013).