Understanding the effects of a new grazing policy: the impact of seasonal grazing on shrub demography in the Inner Mongolian steppe

doi:10.1111/1365-2664.12159

	Understanding the effects of a new grazing policy: the impact of seasonal grazing on shrub demography in the Inner Mongolian steppe
	Li, Shou-Li ; Yu, Fei-Hai ; Werger, Marinus J. A.; Dong, Ming 6; Ramula, Satu 4,5; Zuidema, Pieter A.
	2013
发表期刊	JOURNAL OF APPLIED ECOLOGY
ISSN	0021-8901
卷号	50 期号:6 页码:1377-1386
摘要	Grazing by livestock is a common land use in arid and semi-arid areas. Developing sustainable grazing regimes that conserve vegetation and maintain productivity is therefore important in these ecosystems. To solve environmental problems induced by overgrazing in Chinese semi-arid regions, the Chinese government has recently implemented a new policy of seasonal grazing, with no grazing from April to July. While this policy has been implemented in huge areas, its consequences for grazed plant populations have not been assessed so far. We evaluated the demographic consequences of seasonal grazing for Caragana intermedia, a long-lived dominant shrub serving as a main food source for livestock in Inner Mongolia, China. Controlled seasonally grazed and ungrazed populations were monitored during 2007-2009, and their vital rates were compared. We then constructed integral projection models (IPMs) to analyse the effects of seasonal grazing on population dynamics. Seasonal grazing negatively affected two vital rates: seedling survival and seedling recruitment were 25-71% and 69-91% lower in the seasonally grazed treatment than in the ungrazed situation, respectively. Seasonal grazing had a minimal effect on adult survival and growth, but improved juvenile survival by 8-31%. Despite its effects on several vital rates, seasonal grazing did not significantly affect long-term population growth rates (), which remained close to unity in both grazed and ungrazed areas based on deterministic and stochastic analyses. An elasticity analysis showed that population growth rate was mainly governed by the high survival of large adults. Results of Life Table Response Experiments (LTREs) revealed that variation in population growth rates across treatments and years was more strongly governed by temporal differences than by grazing.Synthesis and applications. Our study showed that the relatively large changes in vital rates induced by seasonal grazing did not affect population growth rates. Caragana intermedia populations can be sustained under the seasonal grazing regime probably because the grazing intensity is moderate and because this species has a high probability of adult survival under grazing. Plant species with similar life-history traits to C.intermedia are likely to offer good opportunities for sustainable seasonal grazing regimes in arid and semi-arid inland ecosystems.
关键词	Caragana intermedia elasticity grazing integral projection model Life Table Response Experiments semi-arid sandland shrub demography stochasticity
学科领域	Biodiversity Conservation ; Ecology
DOI	10.1111/1365-2664.12159
收录类别	SCI
语种	英语
WOS关键词	HERB LATHYRUS-VERNUS ; POPULATION-DYNAMICS ; PROJECTION MODELS ; ELASTICITIES ; PLANT ; RESTORATION ; VARIABILITY ; PERFORMANCE ; EXTINCTION ; HERBIVORES
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000327027200011
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1365-2664
资助机构	NSFC(National Natural Science Foundation of China (NSFC)) ; ERC(European Research Council (ERC)European Commission)
作者邮箱	Yu, Fei-Hai/O-9395-2016 ; Zuidema, Pieter A/C-8951-2009 ; Li, Shouli/B-7077-2016 ; Li, Shouli/P-5687-2018
作品OA属性	Bronze
引用统计	被引频次：37[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/2S10CLM1/28144
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.Li, Shou-Li; Werger, Marinus J. A.; Zuidema, Pieter A.] Univ Utrecht, Inst Environm Biol, Ecol & Biodivers Grp, NL-3584 CH Utrecht, Netherlands 3.Beijing Forestry Univ, Sch Nat Conservat, Beijing 100083, Peoples R China 4.Zuidema, Pieter A.] Wageningen Univ, Dept Environm Sci, Forest Ecol & Forest Management Grp, NL-6700 AA Wageningen, Netherlands 5.Univ Turku, Dept Biol, Sect Ecol, Turku 20014, Finland 6.Abo Akad Univ, Aronia Coastal Zone Res Team, Ekenas 10600, Finland 7.Hangzhou Normal Univ, Coll Life & Environm Sci, Hangzhou 310036, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Li, Shou-Li,Yu, Fei-Hai,Werger, Marinus J. A.,et al. Understanding the effects of a new grazing policy: the impact of seasonal grazing on shrub demography in the Inner Mongolian steppe[J]. JOURNAL OF APPLIED ECOLOGY,2013,50(6):1377-1386.
APA	Li, Shou-Li,Yu, Fei-Hai,Werger, Marinus J. A.,Dong, Ming,Ramula, Satu,&Zuidema, Pieter A..(2013).Understanding the effects of a new grazing policy: the impact of seasonal grazing on shrub demography in the Inner Mongolian steppe.JOURNAL OF APPLIED ECOLOGY,50(6),1377-1386.
MLA	Li, Shou-Li,et al."Understanding the effects of a new grazing policy: the impact of seasonal grazing on shrub demography in the Inner Mongolian steppe".JOURNAL OF APPLIED ECOLOGY 50.6(2013):1377-1386.

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