Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s00442-018-4200-9 |
A tale of ENSO, PDO, and increasing aridity impacts on drought-deciduous shrubs in the Death Valley region | |
Ehleringer, James R.1; Sandquist, Darren R.2 | |
通讯作者 | Ehleringer, James R. |
来源期刊 | OECOLOGIA
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ISSN | 0029-8549 |
EISSN | 1432-1939 |
出版年 | 2018 |
卷号 | 187期号:4页码:879-895 |
英文摘要 | Germination, establishment, phenology, and death among three drought-deciduous shrubs were influenced by ENSO/PDO and precipitation, based on 37 years of annual surveys. Encelia farinosa forms near monospecific stands on slopes, whereas E. frutescens and Ambrosia salsola dominate wash habitats. All shrubs exhibited phenological coherence. While germination, establishment, and mortality patterns were similar among wash species, these dynamics contrasted with E. farinosa on slopes. Germination was associated with El Nio years. Slope plant establishment was dependent on precipitation in the subsequent year, but not evidently so in wash species. Major mortality events were episodic, with Encelia mortality just as likely to occur in years with below or above average precipitation. In both Encelia species, mortality was associated with transitions to a cold PDO phase. In E. frutescens this response was more rapid, whereas in E. farinosa mortality lagged 1 year, resulting in contrasting slope-wash mortality patterns. 50% of newly established shrubs died within 5, 5, and 18 years for E. frutescens, E. farinosa, and A. salsola, respectively. The 90% mortality ages were 26 years for E. frutescens, 24 years for E. farinosa, and 51 years for A. salsola. While maximum life expectancies are unknown, estimated maximum life expectancies were 56, 66, and 86 years for E. frutescens, E. farinosa, and A. salsola, respectively. Overall, as the climate has become more arid over the past four decades, the populations in both slope and wash habitats have exhibited similar responses: reduced shrub abundances and reduced total supportable leaf areas. |
英文关键词 | Encelia Ambrosia Life expectancy Germination Mojave Desert Climate change |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000438271200002 |
WOS关键词 | CARBON-ISOTOPE DISCRIMINATION ; DESERT PERENNIAL PLANTS ; RECENT CLIMATE-CHANGE ; ENCELIA-FARINOSA ; MOJAVE-DESERT ; SONORAN-DESERT ; HYMENOCLEA-SALSOLA ; WATER RELATIONS ; ROOT COMMUNICATION ; VEGETATION CHANGE |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/211875 |
作者单位 | 1.Univ Utah, Sch Biol Sci, 257 South 1400 East, Salt Lake City, UT 84112 USA; 2.Calif State Univ Fullerton, Dept Biol Sci, North State Coll Blvd, Fullerton, CA 92834 USA |
推荐引用方式 GB/T 7714 | Ehleringer, James R.,Sandquist, Darren R.. A tale of ENSO, PDO, and increasing aridity impacts on drought-deciduous shrubs in the Death Valley region[J],2018,187(4):879-895. |
APA | Ehleringer, James R.,&Sandquist, Darren R..(2018).A tale of ENSO, PDO, and increasing aridity impacts on drought-deciduous shrubs in the Death Valley region.OECOLOGIA,187(4),879-895. |
MLA | Ehleringer, James R.,et al."A tale of ENSO, PDO, and increasing aridity impacts on drought-deciduous shrubs in the Death Valley region".OECOLOGIA 187.4(2018):879-895. |
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