EFFECTS OF PROTECTIVE ENCLOSURE ON VEGETATION DIVERSITY, AND PRODUCTIVITY OF DEGRADED ALPINE KOBRESIA MEADOW (QINGHAI-TIBETAN PLATEAU)

NWIPB OpenIR

	EFFECTS OF PROTECTIVE ENCLOSURE ON VEGETATION DIVERSITY, AND PRODUCTIVITY OF DEGRADED ALPINE KOBRESIA MEADOW (QINGHAI-TIBETAN PLATEAU)
	Li, Shixiong 1,2; Wang, Qiji 1; Jing, Zengchun 1; Wang, Wenying 3
	2009
发表期刊	POLISH JOURNAL OF ECOLOGY
ISSN	1505-2249
卷号	57 期号:3 页码:495-502
文章类型	Article
摘要	Grassland degradation due to anthropogenic and natural factors and their interactions is one of the worldwide ecological and economic problems because it reduces grassland productivity and diversity and leads to desertification. The objective of this study was to assess the influence of protective enclosure on vegetation composition and diversity and plant biomass of an alpine degraded meadow. The experiment was conducted at center of Qinghai-Tibetan Plateau with two degraded (caused by overgrazing) alpine meadows: the lightly and severely degraded ones (LD and SD) and their enclosed areas with iron net (LDE and SDE, respectively). The areas 200 m x 150 m for each of four degraded alpine meadow treatments at average altitude 3,960 m a.s.l. were set for research. The lightly degraded plots were dominated by Scirpus distigmaticus (Kukenth.) Tang et Wang, Elymus nutans Griseb. and Oxytropis ochrocephala Bunge. The dominating plants in severely degraded plots were: Artemisia sieversiana Ehrhart ex Willd, Ajania tenuifolia (Jacq.) Tzvel, Lonicera minuta Batal. The results showed: (1) the vegetation cover of two degraded plots (LD and SD) has increased after taking the enclosure measures and the forbs dominated both plots. (2) Species richness has also increased in two enclosed degraded plots, respectively. There no significant differences in evenness and diversity between LD and LDE, and SD and SDE, respectively. (3) Enclosure may promote aboveground biomass, particularly grass and forb biomass in LD, and forb biomass in SD plots.; Grassland degradation due to anthropogenic and natural factors and their interactions is one of the worldwide ecological and economic problems because it reduces grassland productivity and diversity and leads to desertification. The objective of this study was to assess the influence of protective enclosure on vegetation composition and diversity and plant biomass of an alpine degraded meadow. The experiment was conducted at center of Qinghai-Tibetan Plateau with two degraded (caused by overgrazing) alpine meadows: the lightly and severely degraded ones (LD and SD) and their enclosed areas with iron net (LDE and SDE, respectively). The areas 200 m x 150 m for each of four degraded alpine meadow treatments at average altitude 3,960 m a.s.l. were set for research. The lightly degraded plots were dominated by Scirpus distigmaticus (Kukenth.) Tang et Wang, Elymus nutans Griseb. and Oxytropis ochrocephala Bunge. The dominating plants in severely degraded plots were: Artemisia sieversiana Ehrhart ex Willd, Ajania tenuifolia (Jacq.) Tzvel, Lonicera minuta Batal. The results showed: (1) the vegetation cover of two degraded plots (LD and SD) has increased after taking the enclosure measures and the forbs dominated both plots. (2) Species richness has also increased in two enclosed degraded plots, respectively. There no significant differences in evenness and diversity between LD and LDE, and SD and SDE, respectively. (3) Enclosure may promote aboveground biomass, particularly grass and forb biomass in LD, and forb biomass in SD plots.
关键词	Alpine Steppe Meadow Land Degradation Enclosure Species Diversity Productivity
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
关键词[WOS]	LAND MANAGEMENT ; CLIMATE-CHANGE ; SOILS ; DESERTIFICATION ; RESTORATION ; GRASSLANDS ; QUALITY
收录类别	SCI
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:000270012200007
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/1914
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, NW Plateau Inst Biol, Xining 810001, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Qinghai Normal Univ, Coll Life Sci, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Li, Shixiong,Wang, Qiji,Jing, Zengchun,et al. EFFECTS OF PROTECTIVE ENCLOSURE ON VEGETATION DIVERSITY, AND PRODUCTIVITY OF DEGRADED ALPINE KOBRESIA MEADOW (QINGHAI-TIBETAN PLATEAU)[J]. POLISH JOURNAL OF ECOLOGY,2009,57(3):495-502.
APA	Li, Shixiong,Wang, Qiji,Jing, Zengchun,&Wang, Wenying.(2009).EFFECTS OF PROTECTIVE ENCLOSURE ON VEGETATION DIVERSITY, AND PRODUCTIVITY OF DEGRADED ALPINE KOBRESIA MEADOW (QINGHAI-TIBETAN PLATEAU).POLISH JOURNAL OF ECOLOGY,57(3),495-502.
MLA	Li, Shixiong,et al."EFFECTS OF PROTECTIVE ENCLOSURE ON VEGETATION DIVERSITY, AND PRODUCTIVITY OF DEGRADED ALPINE KOBRESIA MEADOW (QINGHAI-TIBETAN PLATEAU)".POLISH JOURNAL OF ECOLOGY 57.3(2009):495-502.