Long-term livestock exclusion facilitates native woody plant encroachment in a sandy semiarid rangeland

doi:10.1002/ece3.1531

	Long-term livestock exclusion facilitates native woody plant encroachment in a sandy semiarid rangeland
	Su, Hua ; Liu, Wei ; Xu, Hong ; Wang, Zongshuai 1; Zhang, Huifang 1; Hu, Haixiao 2; Li, Yonggeng
	2015
发表期刊	ECOLOGY AND EVOLUTION
ISSN	2045-7758
卷号	5 期号:12 页码:2445-2456
摘要	The role of livestock grazing in regulating woody cover and biomass in grass-dominant systems is well recognized. However, the way in which woody plant populations in respond when livestock are removed from grazing in the absence of other disturbances, such as fire, remains unclear. We conducted a 10-year, replicated fencing experiment in a sandy semiarid rangeland in northern China (which has a mean annual rainfall of 365mm), where fires have been actively suppressed for decades. Fencing dramatically influenced the growth and age structure of the native tree species, Ulmus pumila, which is the sole dominant tree in the area. After a decade, the density of the U.pumila tree population in the fencing plots increased doubly and canopy cover increased triply. The proportion of both saplings (U-2) and young trees (U-3) increased in fencing plots but decreased in grazing plots after the 10-year treatment period. The effects of fencing on U.pumila trees varied by age class, with potential implications for the future structure of the U.pumila tree community. Decadal fencing led to approximately 80-fold increase in recruitment and a nearly 2.5-fold decrease in the mortality of both U-2 and U-3. Further, livestock grazing generated a browsing trap to the recruitment of both U-2 and U-3, and had a small impact on the mortality of old trees. A long-term, fencing-driven shift in woody species composition was mediated via its effects on both recruitment and mortality rates.Synthesis and applications. Our results demonstrate that in the long-term absence of both fire and livestock, native woody plant encroachment tends to occur in sandy rangelands, transforming the woody plant demography in the process. The feasibility of full livestock exclusion in sandy rangelands requires further discussion. A balanced amount of livestock grazing may provide critical ecosystem services by regulating woody cover and mediating woody plant encroachment.
关键词	Fencing Hunshandake livestock exclusion livestock grazing semiarid rangeland Ulmus pumila woody plant encroachment
学科领域	Ecology ; Evolutionary Biology
DOI	10.1002/ece3.1531
收录类别	SCI
语种	英语
WOS关键词	ELM ULMUS-PUMILA ; SHRUB ENCROACHMENT ; LAND-USE ; ECOSYSTEM RESPONSES ; COMMUNITY STRUCTURE ; GRASS COMPETITION ; AFRICAN SAVANNA ; ACACIA-KARROO ; FIRE ; HERBIVORY
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000356370400013
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
资助机构	National Natural Science Foundation of China [31400338] ; Strategic Priority Program of Chinese Academy of Sciences [XDA05070102]
作者邮箱	liyonggeng@ibcas.ac.cn
作品OA属性	Green Published, gold
引用统计	被引频次：21[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/2S10CLM1/25716
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.Nanjing Agr Univ, Natl Engn & Technol Ctr Informat Agr, Minist Agr, Key Lab Crop Physiol & Ecol Southern China, Nanjing 210095, Jiangsu, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Su, Hua,Liu, Wei,Xu, Hong,et al. Long-term livestock exclusion facilitates native woody plant encroachment in a sandy semiarid rangeland[J]. ECOLOGY AND EVOLUTION,2015,5(12):2445-2456.
APA	Su, Hua.,Liu, Wei.,Xu, Hong.,Wang, Zongshuai.,Zhang, Huifang.,...&Li, Yonggeng.(2015).Long-term livestock exclusion facilitates native woody plant encroachment in a sandy semiarid rangeland.ECOLOGY AND EVOLUTION,5(12),2445-2456.
MLA	Su, Hua,et al."Long-term livestock exclusion facilitates native woody plant encroachment in a sandy semiarid rangeland".ECOLOGY AND EVOLUTION 5.12(2015):2445-2456.

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