Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s004420100779 |
The influence of climatic variability on local populations dynamics of Cercidium microphyllum (foothill paloverde) | |
Bowers, JE; Turner, RM | |
通讯作者 | Bowers, JE |
来源期刊 | OECOLOGIA
![]() |
ISSN | 0029-8549 |
出版年 | 2002 |
卷号 | 130期号:1页码:105-113 |
英文摘要 | This study investigated correlations among climatic variability, population age structure, and seedling survival of a dominant Sonoran Desert tree, Cercidium microphyllum (foothill paloverde), at Tucson, Arizona, USA. A major goal was to determine whether wet years promote seedling establishment and thereby, determine population structure. Plant age was estimated from basal circumference for a sample of 980 living and dead trees in twelve 0.5-ha plots. Ages ranged from 1 to 181 years. Age frequency distribution showed that the population is in decline. Most (51.2%) of the 814 living trees were 40-80 years old; only 6.5% were younger than 20 years. The average age of the 166 dead trees was 78 years. Fifty-nine percent of dead trees were aged 60-100 years. Survival of newly emerged seedlings was monitored for 7 years in a 557-m(2) permanent plot. Mean survival in the 1st year of life was 1.7%. Only 2 of 1,008 seedlings lived longer than 1 year. Length of survival was not correlated with rainfall. Residual regeneration, an index of the difference between predicted arid observed cohort size, showed that regeneration was high during the first half of the twentieth century and poor after the mid-1950s. Trends in regeneration did not reflect interannual variation in seasonal temperature or rain before 1950, that is, in the years before urban warming. Taken together, the seedling study and the regeneration analysis suggest that local population dynamics reflect biotic factors to such an extent that population age structure might not always be a reliable clue to past climatic influences. |
英文关键词 | age frequency distribution mortality regeneration Sonoran Desert survivorship |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000173032500012 |
WOS关键词 | SONORAN DESERT ; VEGETATION CHANGE ; ESTABLISHMENT ; DEMOGRAPHY ; SEEDLINGS ; GROWTH ; CACTI |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
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/2XILL650/143475 |
作者单位 | (1)US Geol Survey, Tucson, AZ 85745 USA |
推荐引用方式 GB/T 7714 | Bowers, JE,Turner, RM. The influence of climatic variability on local populations dynamics of Cercidium microphyllum (foothill paloverde)[J]. United States Geological Survey,2002,130(1):105-113. |
APA | Bowers, JE,&Turner, RM.(2002).The influence of climatic variability on local populations dynamics of Cercidium microphyllum (foothill paloverde).OECOLOGIA,130(1),105-113. |
MLA | Bowers, JE,et al."The influence of climatic variability on local populations dynamics of Cercidium microphyllum (foothill paloverde)".OECOLOGIA 130.1(2002):105-113. |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[Bowers, JE]的文章 |
[Turner, RM]的文章 |
百度学术 |
百度学术中相似的文章 |
[Bowers, JE]的文章 |
[Turner, RM]的文章 |
必应学术 |
必应学术中相似的文章 |
[Bowers, JE]的文章 |
[Turner, RM]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。