Mammalian biogeography of the Alexander Archipelago of Alaska: a north temperate nested fauna
نویسندگان
چکیده
Aim A large number of studies have analysed the distribution of mammals within archipelagos, yet few have focused on islands that were heavily glaciated and subsequently colonized following deglaciation. Location We explored the relative effects of island area and isolation on faunal composition based on twenty-three mammalian taxa of twenty-four islands of the Alexander Archipelago, Southeast Alaska. Methods We used regression of log-transformed variables and several indices of nestedness. Results These faunas showed significant nested structure using tests of nestedness and regression models. Unlike most landbridge and mainland archipelagos studied previously, isolation appears to be the primary factor determining patterns of species richness. Main conclusions Colonization ability of particular taxa, rather than extinction, has determined this nested structure. We suggest that other higher latitude archipelagos may show similar historical patterns.
منابع مشابه
Postglacial Distribution Patterns of Mammals in the Southern Coastal Regions of Alaska
D URING the Wisconsin glaciation the present land areas of the coastal regions of Alaska bordering the Gulf of Alaska were virtually completely overridden by ice. The now existing flora and fauna of the region have presumably become established in the 10,000 years since the recession of the ice. Swarth discussed the origins of the fauna of the “Sitkan District’’ in 1936, and since then addition...
متن کاملFirst Alaskan records and a significant northern range extension for two species of Diplura 147 First Alaskan records and a significant northern range extension for two species of Diplura (Diplura, Campodeidae)
Species in the class Diplura are recorded from Alaska for the first time. Two species, Tricampa rileyi Silvestri from Dall and Prince of Wales Islands in the Alexander Archipelago of Southeast Alaska and Metriocampa allocerca Conde & Geeraert from near Quartz Lake, southeast of Fairbanks, both in the family Campodeidae, are documented based on recently collected specimens deposited in the Unive...
متن کاملInfluences of Island Characteristics on Plant Community Structure of Farasan Archipelago, Saudi Arabia: Island Biogeography and Nested Pattern
متن کامل
Molecular biogeography and diversification of the endemic terrestrial fauna of the Hawaiian Islands.
Oceanic islands have played a central role in biogeography and evolutionary biology. Here, we review molecular studies of the endemic terrestrial fauna of the Hawaiian archipelago. For some groups, monophyly and presumed single origin of the Hawaiian radiations have been confirmed (achatinelline tree snails, drepanidine honeycreepers, drosophilid flies, Havaika spiders, Hylaeus bees, Laupala cr...
متن کاملMammals from the mid-Cretaceous Khodzhakul Formation, Kyzylkum Desert, Uzbekistan
Six localities in the mid-Cretaceous (early Cenomanian) Khodzhakul Formation, western Kyzylkum Desert, Uzbekistan, produced mammalian remains of a possible zalambdalestoid (Bobolestes), a possible zalambdalestid, and two (Sheikhdzheilia rezvyii, gen. et sp. nov. and Eozhelestes mangit) or three zhelestids (‘‘Zhelestidae’’ indet., unnamed large sp. A). This is termed the Sheikhdzheili local faun...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1999