Arid
DOI10.1111/j.1365-2486.2011.02498.x
Directional climate change and potential reversal of desertification in arid and semiarid ecosystems
Peters, Debra P. C.1,2; Yao, Jin1; Sala, Osvaldo E.1,3; Anderson, John P.1
通讯作者Peters, Debra P. C.
来源期刊GLOBAL CHANGE BIOLOGY
ISSN1354-1013
出版年2012
卷号18期号:1页码:151-163
英文摘要

Our objective was to determine if long-term increases in precipitation can maintain grasslands susceptible to desertification, and initiate a reversal of historic regime shifts on desertified shrublands. Perennial grass production and species richness in a multi-year wet period were hypothesized to be greater than expected based on precipitation in a sequence of dry years. These responses were expected to differ for grasslands and shrublands with different dominant species and topo-edaphic properties. Long-term trends in desertification were documented using vegetation maps beginning in 1858, 1915, 1928, and 1998). These trends were compared with herbaceous and woody species responses to a sequence of dry (19942003) and wet years (20042008) for two grassland (uplands, playas) and three desertified shrubland types (honey mesquite, creosotebush, tarbush) in the Chihuahuan Desert. Analyses showed that both types of grasslands decreased in spatial extent since 1858 whereas areas dominated by mesquite or creosotebush increased. Production of upland grasslands in the wet period was greater than expected based on responses during the dry period whereas the relationships between species richness and precipitation was the same for both periods. Precipitation was not important to responses in playa grasslands in either period. For all ecosystem types, the production response in wet years primarily was an increase in herbaceous plants, and the most pronounced responses occurred on sandy sites (upland grasslands, mesquite shrubland). Results suggest that multiple wet years are needed to initiate a sequence of grass establishment and survival processes that can maintain upland grasslands without management inputs and lead to a state change reversal in desertified shrublands. Restoration strategies need to take advantage of opportunities provided by future climates while recognizing the importance of ecosystem type.


英文关键词extreme events grasslands regime shift shrublands spatial context wet-dry climatic periods
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000298598900014
WOS关键词NORTHERN CHIHUAHUAN DESERT ; NET PRIMARY PRODUCTION ; RAIN USE EFFICIENCY ; UNITED-STATES ; GLOBAL DESERTIFICATION ; GRASSLAND ECOSYSTEM ; AMERICAN SOUTHWEST ; VEGETATION CHANGES ; PATAGONIAN STEPPE ; NEW-MEXICO
WOS类目Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构Arizona State University ; New Mexico State University
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/172646
作者单位1.New Mexico State Univ, Jornada Basin Long Term Ecol Res Program, Las Cruces, NM 88003 USA;
2.ARS, USDA, Las Cruces, NM 88003 USA;
3.Arizona State Univ, Sch Life Sci & Sch Sustainabil, Tempe, AZ 85287 USA
推荐引用方式
GB/T 7714
Peters, Debra P. C.,Yao, Jin,Sala, Osvaldo E.,et al. Directional climate change and potential reversal of desertification in arid and semiarid ecosystems[J]. Arizona State University, New Mexico State University,2012,18(1):151-163.
APA Peters, Debra P. C.,Yao, Jin,Sala, Osvaldo E.,&Anderson, John P..(2012).Directional climate change and potential reversal of desertification in arid and semiarid ecosystems.GLOBAL CHANGE BIOLOGY,18(1),151-163.
MLA Peters, Debra P. C.,et al."Directional climate change and potential reversal of desertification in arid and semiarid ecosystems".GLOBAL CHANGE BIOLOGY 18.1(2012):151-163.
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