Arid
DOI10.1046/j.1365-2699.2000.00387.x
How isolated are Pleistocene refugia! Results from a study on a relict woodrat population from the Mojave Desert, California
Smith, FA; Matocq, MD; Melendez, KF; Ditto, AM; Kelly, PA
通讯作者Smith, FA
来源期刊JOURNAL OF BIOGEOGRAPHY
ISSN0305-0270
出版年2000
卷号27期号:2页码:483-500
英文摘要

Pleistocene vicariance is often invoked to explain the disjunct populations of animals in habitat refugia throughout the southwestern United States. The combined effects of small population size and isolation from the rest of the contiguous range are thought to result in genetic differentiation of relict organisms.


Here, we describe a relict population of dusky-footed woodrats (Neotoma fuscipes Baird) found in a pinyon-juniper-oak community in a small mountain range within the Mojave Desert. We compare morphological and genetic data for these individuals with two populations within the contiguous range, and with another species of woodrat (Neotoma lepida). We also examine the distributional overlap between contemporary oak species and dusky-footed woodrats, and estimate the potential oak woodland habitat available during the late Quaternary.


As expected, both the morphological and generic analysis confirm that the relict population is N. fuscipes. Within the limitations of our data, we detect no evidence of differentiation, Instead, the relict population forms a paraphyletic group with the nearest population within the contiguous range. This may be explained by the combined influences of a shorter period of isolation and a greater effective population size than was originally expected.


The linkage between contemporary oak and dusky-footed woodrat distributions is very tight, reinforcing the idea of an obligate relationship between the two.


We estimate that at similar to 8000 ybp, pinyon-juniper-oak woodlands may have covered similar to 53% of the central Mojave, forming large contiguous areas of habitat. Although considerably more fragmented, at present similar to 12% of the area consists of relict woodlands.


Our results suggest that there may be numerous other woodrat refugia, with a relatively high degree of connectiveness between the larger ones. Animals within them may effectively function as a single metapopulation, buffering against occasional stochastic extinction events.


英文关键词oak/juniper woodlands biogeography Pleistocene vicariance climate change d-loop evolution Neotoma fuscipes
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000089193500020
WOS关键词EASTERN UNITED-STATES ; MITOCHONDRIAL-DNA ; AMERICAN SOUTHWEST ; NEOTOMA ; BIOGEOGRAPHY
WOS类目Ecology ; Geography, Physical
WOS研究方向Environmental Sciences & Ecology ; Physical Geography
来源机构University of California, Berkeley
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/139294
作者单位(1)Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA;(2)Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA;(3)Univ Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720 USA;(4)San Joaquin Valley Endangered Species Recovery Pr, Fresno, CA 93727 USA
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Smith, FA,Matocq, MD,Melendez, KF,et al. How isolated are Pleistocene refugia! Results from a study on a relict woodrat population from the Mojave Desert, California[J]. University of California, Berkeley,2000,27(2):483-500.
APA Smith, FA,Matocq, MD,Melendez, KF,Ditto, AM,&Kelly, PA.(2000).How isolated are Pleistocene refugia! Results from a study on a relict woodrat population from the Mojave Desert, California.JOURNAL OF BIOGEOGRAPHY,27(2),483-500.
MLA Smith, FA,et al."How isolated are Pleistocene refugia! Results from a study on a relict woodrat population from the Mojave Desert, California".JOURNAL OF BIOGEOGRAPHY 27.2(2000):483-500.
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