Reduced genetic variation in insular northern flying squirrels (Glaucomys sabrinus) along the North Pacific Coast

被引:43
作者
Bidlack, AL
Cook, JA
机构
[1] Univ Alaska Museum, Fairbanks, AK 99775 USA
[2] Inst Arctic Biol, Fairbanks, AK 99775 USA
[3] Idaho State Univ, Pocatello, ID 83207 USA
关键词
D O I
10.1017/S1367943001008885
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
Nearshore oceanic archipelagos are natural laboratories that could provide valuable insight into the role of evolutionary processes such as founder effects and incipient speciation in biotic conservation. The Alexander Archipelago of Southeast Alaska is an example of such a complex, yet few biological investigations have been conducted. For the past 50 years, the region has experienced intense anthropogenic disturbances (particularly timber harvesting), causing habitat fragmentation and potential disruption of biotic communities. As part of a series of studies of mammals endemic to Southeast Alaska, we examined mitochondrial DNA sequences from 118 flying squirrels to investigate genetic diversity across Southeast Alaska. Mitochondrial sequence divergence corroborates the subspecific designation of the endemic Prince of Wales flying squirrel (Glaucomys sabrinus griseifrons). This island lineage exhibits severely reduced genetic variation and may be the result of an early Holocene founder event. Nearly all of the animals we examined on Prince of Wales Island and ten islands to the west had identical cytochrome b (52 of 53) and control region (21 of 21) sequences. In contrast, substantial polymorphism and little genetic structuring were found in comparable populations on the mainland of Southeast and Interior Alaska. Because flying squirrels in the Pacific Northwest are associated with old-growth forest, forest-use plans should aim to conserve this unique lineage of island squirrels.
引用
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页码:283 / 290
页数:8
相关论文
共 43 条
[1]  
Carey AB, 1996, NORTHWEST SCI, V70, P72
[2]   SCIURIDS IN PACIFIC-NORTHWEST MANAGED AND OLD-GROWTH FORESTS [J].
CAREY, AB .
ECOLOGICAL APPLICATIONS, 1995, 5 (03) :648-661
[3]   Mammalian biogeography of the Alexander Archipelago of Alaska: a north temperate nested fauna [J].
Conroy, CJ ;
Demboski, JR ;
Cook, JA .
JOURNAL OF BIOGEOGRAPHY, 1999, 26 (02) :343-352
[4]   A phylogeographic perspective on endemism in the Alexander Archipelago of southeast Alaska [J].
Cook, JA ;
Bidlack, AL ;
Conroy, CJ ;
Demboski, JR ;
Fleming, MA ;
Runck, AM ;
Stone, KD ;
MacDonald, SO .
BIOLOGICAL CONSERVATION, 2001, 97 (02) :215-227
[5]   Should endemism be a focus of conservation efforts along the North Pacific Coast of North America? [J].
Cook, JA ;
MacDonald, SO .
BIOLOGICAL CONSERVATION, 2001, 97 (02) :207-213
[6]   Considering evolutionary processes in conservation biology [J].
Crandall, KA ;
Bininda-Emonds, ORP ;
Mace, GM ;
Wayne, RK .
TRENDS IN ECOLOGY & EVOLUTION, 2000, 15 (07) :290-295
[7]  
Demboski J. R., 1998, N AM RODENTS STATUS, P37
[8]  
Demboski JR, 1999, EVOLUTION, V53, P2008, DOI 10.1111/j.1558-5646.1999.tb04584.x
[9]   Implications of cytochrome b sequence variation for biogeography and conservation of the northern flying squirrels (Glaucomys sabrinus) of the Alexander Archipelago, Alaska [J].
Demboski, JR ;
Jacobsen, BK ;
Cook, JA .
CANADIAN JOURNAL OF ZOOLOGY, 1998, 76 (09) :1771-1777