The effect of land management on plant community composition, species diversity, and productivity of alpine Kobersia steppe meadow

NWIPB OpenIR

	The effect of land management on plant community composition, species diversity, and productivity of alpine Kobersia steppe meadow
	Wang, WY ; Wang, QJ ; Wang, HC
	2006-03-01
发表期刊	ECOLOGICAL RESEARCH ; Wang Wenying, Wang Qiji, Wang Huichun. The effect of land management on plant community composition, species diversity, and productivity of alpine Kobersia steppe meadow.ECOLOGICAL RESEARCH,2006,21(2):181-187
摘要	Grassland degradation is widespread and severe on the Tibet Plateau. To explore management approaches for sustainable development of degraded and restored ecosystems, we studied the effect of land degradation on species composition, species diversity, and vegetation productivity, and examined the relative influence of various rehabilitation practices (two seeding treatments and a non-seeded natural recovery treatment) on community structure and vegetation productivity in early secondary succession. The results showed: (1) All sedge and grass species of the natural steppe meadow had disappeared from the severely degraded land. The above-ground and root biomass of severely degraded land were only 38 and 14.7%, respectively, of those of the control. So, the original ecosystem has been dramatically altered by land degradation on alpine steppe meadow. (2) Seeding measures may promote above-ground biomass, particularly grass biomass, and ground cover. Except for the grasses seeded, however, other grass and sedge species did not occur after seeding treatments in the sixth year of seeding. Establishment of grasses during natural recovery treatment progressed slowly compared with during seeding treatments. Many annual forbs invaded and established during the 6 years of natural recovery. In addition, there was greater diversity after natural recovery treatment than after seeding treatments. (3) The above-ground biomass after seeding treatment and natural recovery treatment were 114 and 55%, respectively, of that of the control. No significant differences in root biomass occurred among the natural recovery and seeded treatments. Root biomass after rehabilitation treatment was 23-31% that of the control.; Grassland degradation is widespread and severe on the Tibet Plateau. To explore management approaches for sustainable development of degraded and restored ecosystems, we studied the effect of land degradation on species composition, species diversity, and vegetation productivity, and examined the relative influence of various rehabilitation practices (two seeding treatments and a non-seeded natural recovery treatment) on community structure and vegetation productivity in early secondary succession. The results showed: (1) All sedge and grass species of the natural steppe meadow had disappeared from the severely degraded land. The above-ground and root biomass of severely degraded land were only 38 and 14.7%, respectively, of those of the control. So, the original ecosystem has been dramatically altered by land degradation on alpine steppe meadow. (2) Seeding measures may promote above-ground biomass, particularly grass biomass, and ground cover. Except for the grasses seeded, however, other grass and sedge species did not occur after seeding treatments in the sixth year of seeding. Establishment of grasses during natural recovery treatment progressed slowly compared with during seeding treatments. Many annual forbs invaded and established during the 6 years of natural recovery. In addition, there was greater diversity after natural recovery treatment than after seeding treatments. (3) The above-ground biomass after seeding treatment and natural recovery treatment were 114 and 55%, respectively, of that of the control. No significant differences in root biomass occurred among the natural recovery and seeded treatments. Root biomass after rehabilitation treatment was 23-31% that of the control.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/55898
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	Wang, WY,Wang, QJ,Wang, HC. The effect of land management on plant community composition, species diversity, and productivity of alpine Kobersia steppe meadow[J]. ECOLOGICAL RESEARCH, Wang Wenying, Wang Qiji, Wang Huichun. The effect of land management on plant community composition, species diversity, and productivity of alpine Kobersia steppe meadow.ECOLOGICAL RESEARCH,2006,21(2):181-187,2006.
APA	Wang, WY,Wang, QJ,&Wang, HC.(2006).The effect of land management on plant community composition, species diversity, and productivity of alpine Kobersia steppe meadow.ECOLOGICAL RESEARCH.
MLA	Wang, WY,et al."The effect of land management on plant community composition, species diversity, and productivity of alpine Kobersia steppe meadow".ECOLOGICAL RESEARCH (2006).