Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jaridenv.2015.01.007 |
Mongolian rangelands at a tipping point? Biomass and cover are stable but composition shifts and richness declines after 20 years of grazing and increasing temperatures | |
Khishigbayar, J.1; Fernandez-Gimenez, Maria E.1; Angerer, Jay P.3; Reid, R. S.2; Chantsallkham, J.1; Baasandorj, Ya4; Zumberelmaa, D.5 | |
通讯作者 | Fernandez-Gimenez, Maria E. |
来源期刊 | JOURNAL OF ARID ENVIRONMENTS |
ISSN | 0140-1963 |
EISSN | 1095-922X |
出版年 | 2015 |
卷号 | 115页码:100-112 |
英文摘要 | Mongolian rangelands have experienced warming temperatures and increasing livestock densities over the past 20 years. Remote sensing studies report widespread degradation, but there are no long-term field studies of vegetation responses to shifts in climate and stocking densities. In 2013, we resampled plots originally sampled in 1994-1995 in the desert-steppe, steppe and mountain-steppe, and analyzed changes in vegetation in relation to changes in climate, stocking densities and forage use. Summer temperatures significantly increased and stocking densities fluctuated in response to droughts followed by harsh winters. Total herbaceous biomass in 2013 was similar to (desert-steppe and steppe) or greater than (mountain-steppe) in 1995, and total foliar and herbaceous cover were unchanged since 1995 in all zones. In the mountain-steppe, functional type and species cover shifts were consistent with warming temperatures and increasing grazing pressure. All species richness and diversity indicators declined significantly in the mountain-steppe since 1995, as did richness in the steppe. Some Mongolian rangelands may be losing resilience due to interacting climate and grazing pressures, but our data suggest degradation observed at our study sites is reversible. Mountain-steppe systems appear more vulnerable to grazing- and climate-induced vegetation change than steppe and desert-steppe.(C) 2015 Elsevier Ltd. All rights reserved. |
英文关键词 | Resilience Climate change Degradation Non-equilibrium rangelands Community-based management Ecological threshold |
类型 | Article |
语种 | 英语 |
国家 | USA ; Mongolia |
收录类别 | SCI-E |
WOS记录号 | WOS:000350778400014 |
WOS关键词 | CLIMATE-CHANGE ; INNER-MONGOLIA ; WATER SOURCES ; VEGETATION ; RESILIENCE ; ECOSYSTEMS ; COMMUNITIES ; LIVESTOCK ; THRESHOLDS ; INDICATORS |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | Colorado State University |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/188312 |
作者单位 | 1.Colorado State Univ, Dept Forest & Rangeland Stewardship, Ft Collins, CO 80523 USA; 2.Colorado State Univ, Dept Ecosyst Sci & Sustainabil, Ft Collins, CO 80523 USA; 3.Texas A&M Agrilife Res, Blackland Res & Extens Ctr, Temple, TX 76502 USA; 4.Mongolian Acad Sci, Inst Geoecol, Ulaanbaatar 211238, Mongolia; 5.Mongolian Acad Sci, Inst Bot, Ulaanbaatar, Mongolia |
推荐引用方式 GB/T 7714 | Khishigbayar, J.,Fernandez-Gimenez, Maria E.,Angerer, Jay P.,et al. Mongolian rangelands at a tipping point? Biomass and cover are stable but composition shifts and richness declines after 20 years of grazing and increasing temperatures[J]. Colorado State University,2015,115:100-112. |
APA | Khishigbayar, J..,Fernandez-Gimenez, Maria E..,Angerer, Jay P..,Reid, R. S..,Chantsallkham, J..,...&Zumberelmaa, D..(2015).Mongolian rangelands at a tipping point? Biomass and cover are stable but composition shifts and richness declines after 20 years of grazing and increasing temperatures.JOURNAL OF ARID ENVIRONMENTS,115,100-112. |
MLA | Khishigbayar, J.,et al."Mongolian rangelands at a tipping point? Biomass and cover are stable but composition shifts and richness declines after 20 years of grazing and increasing temperatures".JOURNAL OF ARID ENVIRONMENTS 115(2015):100-112. |
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