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您的检索式：作者名="Per ALSTRÖM"
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| 1 | The potential drivers in forming avian biodiversity hotspots in the East Himalaya Mountains of Southwest China显示文摘Little has been published to describe or interpret Asian biodiversity hotspots,including those in the East Himalayan Mountains of Southwest China(HMSC),thus making necessary a review of the current knowledge.The Pliocene and Pleistocene geological and glacial histories of the Asian continent differ from those of Europe and North America,suggesting different mechanisms of speciation and extinction,and,thus,different responses to climate changes during the Quaternary glaciations.This short review summarizes potential drivers in shaping and maintaining high species richness and endemism of birds in the HMSC.The geographical location at the junction of different biogeographical realms,the wide range of habitats and climates along the extensive elevational range,the complex topography and the distinct geological history of this region have probably contributed to the evolution of an exceptionally species-rich and endemic-rich,specialized montane avian fauna.The Mountain systems in the HMSC may have provided refugia where species survived during the glacial periods and barriers for preventing species dispersal after the glacial periods.More studies are required to further test this refugia hypothesis by comparing more cold-tolerent and warm-tolerent species. | Fumin LEI Yanhua QU Gang SONG Per ALSTRÖM Jon FJELDSÅ | 2015 | Integrative Zoology2015，10，2： | 3 |
| 2 | Taxonomic status of grey-headed Yellow Wagtails breeding in western China显示文摘Background:Field studies from 2011 onwards have demonstrated the presence of a breeding population of Yellow Wagtails(Motacilla flava)in the Xinjiang Uygur Autonomous Region,China that is phenotypically distinct from known subspecies occurring in Asia.Here we describe the plumages and vocalisations of this population and discuss its taxonomic status.Methods:The analysis of plumage is based on field studies and photos available online.Recordings of vocalisations are compared with recordings from other Yellow Wagtail populations,and differences are analysed based on sonograms.Mitochondrial DNA from one individual is compared to other Yellow Wagtail taxa.Results:Unlike M.flava subspecies breeding in or near Xinjiang,males in the studied population show a blue-grey head without prominent white supercilium,being most similar to the widely disjunct M.f.cinereocapilla.They differ from the similarly widely allopatric M.f.thunbergi,which might occur as a migrant or vagrant in Xinjiang,by on average cleaner yellow breast and more extensive white on the throat,and from the widely disjunct M.f.plexa and M.f.macronyx,which might also occur on migration in that area,by softer contact calls and slower pace of song.Females are similar to female M.f.feldegg in plumage.The mitochondrial ND2 tree shows the single sample from Xinjiang to be nested in the clade of western Yellow Wagtail taxa.Conclusion:We discuss whether the Xinjiang breeding population could represent an intergrade between subspecies breeding nearby,or whether it is better regarded as a separate as yet unrecognized subspecies.We argue that the localization of its apparent range in relation to other subspecies along with fairly consistent male and female plumages suggest that it is more likely to represent an undescribed taxon,but conclude that more research is needed to firmly establish its status. | Alexander Hellquist Fredrik Friberg Petter Haldén Peter Schmidt Ming Ma Gou Jun Urban Olsson Per Alström | 2021 | Avian Research2021，12，4： | 0 |
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