Selective grazing and seasonal precipitation play key roles in shaping plant community structure of semi-arid grasslands

doi:10.1007/s10980-015-0252-y

	Selective grazing and seasonal precipitation play key roles in shaping plant community structure of semi-arid grasslands
	Wan, Hongwei ; Bai, Yongfei; Hooper, David U.; Schoenbach, Philipp 2; Gierus, Martin 3; Schiborra, Anne 4,5; Taube, Friedhelm 2
	2015
发表期刊	LANDSCAPE ECOLOGY
ISSN	0921-2973
卷号	30 期号:9 页码:1767-1782
摘要	Many studies have examined how intensity of grazing and patterns of precipitation individually and interactively influence the spatial and temporal dynamics of grassland vegetation, such as dominance, succession, coexistence, and spatial heterogeneity. However existing models have rarely considered the diet preferences of grazers and how they interact with variation in precipitation amount and timing. We examined how plant community structure responds to the individual and combined effects of grazing intensity, selective grazing, and patterns of precipitation, based on a six-year grazing experiment with seven levels of field-manipulated grazing intensity in a typical steppe of Inner Mongolia. The palatable species, mainly forbs, were most severely damaged at intermediate levels of grazing intensity; given that these species are the major contributors to plant community diversity, a U-shaped diversity-grazing intensity relationship resulted. In contrast, spatial heterogeneity of aboveground biomass and species composition peaked at intermediate levels of grazing intensity. Cold season precipitation positively correlated with the abundance of the dominant C-3 grasses and correlated negatively with the subdominant forbs and C-4 plants. Thus, when cold season precipitation increased, plant community species diversity decreased. Grazing intensity and precipitation did not interact in their effects on species richness. These findings contrast with the predictions from current disturbance-diversity models and indicate that diet selection of grazing animals is an important factor shaping the diversity-grazing intensity relationship in semi-arid grasslands. Future grassland biodiversity conservation and management practices should take diet preference of grazing animals into account.
关键词	Species richness Spatial heterogeneity Precipitation seasonality Diversity-grazing intensity relationship Intermediate disturbance hypothesis Dynamic equilibrium model C-3/C-4 abundance
学科领域	Ecology ; Geography, Physical ; Geosciences, Multidisciplinary
DOI	10.1007/s10980-015-0252-y
收录类别	SCI
语种	英语
WOS关键词	LAND-USE CHANGE ; SPECIES RICHNESS ; LARGE HERBIVORES ; RELATIVE ABUNDANCE ; WATER AVAILABILITY ; BIODIVERSITY LOSS ; TRAIT RESPONSES ; INNER-MONGOLIA ; CLIMATE-CHANGE ; DIVERSITY
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000361903500015
出版者	SPRINGER
文献子类	Article
出版地	DORDRECHT
EISSN	1572-9761
资助机构	Natural Science Foundation of China [30825008, 31300354] ; Deutsche Forschungsgemeinschaft (DFG) for the research group 536 MAGIM (Matter fluxes of grasslands in Inner Mongolia as influenced by stocking rate) ; Chinese Academy of Sciences
作者邮箱	hwwan@ibcas.ac.cn
引用统计	被引频次：68[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/25667
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Hooper, David U.] Western Washington Univ, Dept Biol, Bellingham, WA 98225 USA 3.Univ Kiel, Inst Crop Sci & Plant Breeding Grass & Forage Sci, D-24118 Kiel, Germany 4.Univ Nat Resources & Life Sci, Inst Anim Nutr Prod & Nutr Physiol, A-1190 Vienna, Austria 5.Univ Kassel, Anim Husb Trop & Subtrop, D-37075 Gottingen, Germany 6.Univ Gottingen, D-37075 Gottingen, Germany
推荐引用方式 GB/T 7714	Wan, Hongwei,Bai, Yongfei,Hooper, David U.,et al. Selective grazing and seasonal precipitation play key roles in shaping plant community structure of semi-arid grasslands[J]. LANDSCAPE ECOLOGY,2015,30(9):1767-1782.
APA	Wan, Hongwei.,Bai, Yongfei.,Hooper, David U..,Schoenbach, Philipp.,Gierus, Martin.,...&Taube, Friedhelm.(2015).Selective grazing and seasonal precipitation play key roles in shaping plant community structure of semi-arid grasslands.LANDSCAPE ECOLOGY,30(9),1767-1782.
MLA	Wan, Hongwei,et al."Selective grazing and seasonal precipitation play key roles in shaping plant community structure of semi-arid grasslands".LANDSCAPE ECOLOGY 30.9(2015):1767-1782.

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