Arid
DOI10.3159/1095-5674(2005)132[421:EODOSS]2.0.CO;2
Effects of drought on shrub survival and longevity in the northern Sonoran Desert
Bowers, JE
通讯作者Bowers, JE
来源期刊JOURNAL OF THE TORREY BOTANICAL SOCIETY
ISSN0040-9618
出版年2005
卷号132期号:3页码:421-431
英文摘要

BOWERS, J. E. (U.S. Geological Survey, 1675 West Anklam Road, Tucson, AZ 85745). Effects of drought on shrub survival and longevity in the northern Sonoran Desert. J. Torrey Bot. Soc. 132: 421-431. 2005.-Permanent vegetation plots in the northern Sonoran Desert, USA, provided an opportunity to assess the effects of recent drought on desert shrubs and to examine survival in relation to rainfall variability during the past 76 years. Survival and maximum longevity of six species were determined for eight intercensus periods between 1928 and 2004. Average annual survival was Ambrosia deltoidea, 0.9167 +/- 0.0415; Encelia farinosa, 0.7952 +/- 0.0926; Janusia gracilis, 0.9334 +/- 0.0247; Krameria grayi, 0.9702 +/- 0.0270; Larrea tridentata, 0.9861 +/- 0.0174; and Lycium berlandieri, 0.9910 +/- 0.0077. The longest-lived species were Larrea, Lycium, and Krameria, with average maximum life spans of 330, 211, and 184 years. Janusia, Ambrosia, and Encelia were much shorter lived, with average maximum longevity of 53, 40, and 16 years. Winter rain equalled or exceeded 90% of the long-term average accumulation except during 1948 to 1959 (65% of average) and from 2001 to 2003 (49% of average). Summer rain did not drop below 90% of the average accumulation in any period. The 1950s drought caused modest declines in survival of Ambrosia, Encelia, Janusia, Krameria, and Lycium. The effects of the recent drought were much more pronounced, resulting in sharp declines in survival and maximum longevity of Ambrosia, Encelia, Krameria, and Larrea, and modest declines for Lycium. Despite heightened mortality during the recent severe drought, 72% of the deaths observed between 1928 and 2004 occurred during periods of average or better-than-average rain, providing support for the idea that demography of shrubs in and regions is influenced by continuous as well as episodic processes.


类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000233692800005
WOS关键词MICROPHYLLUM FOOTHILL PALOVERDE ; MOJAVE DESERT ; CLIMATIC VARIABILITY ; VEGETATION CHANGE ; PERENNIAL PLANTS ; DYNAMICS ; COMPONENTS ; DEMOGRAPHY ; MORTALITY ; PATTERNS
WOS类目Plant Sciences
WOS研究方向Plant Sciences
来源机构United States Geological Survey
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/149859
作者单位(1)US Geol Survey, Tucson, AZ 85745 USA
推荐引用方式
GB/T 7714
Bowers, JE. Effects of drought on shrub survival and longevity in the northern Sonoran Desert[J]. United States Geological Survey,2005,132(3):421-431.
APA Bowers, JE.(2005).Effects of drought on shrub survival and longevity in the northern Sonoran Desert.JOURNAL OF THE TORREY BOTANICAL SOCIETY,132(3),421-431.
MLA Bowers, JE."Effects of drought on shrub survival and longevity in the northern Sonoran Desert".JOURNAL OF THE TORREY BOTANICAL SOCIETY 132.3(2005):421-431.
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