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Distribution pattern and driving factors of genetic diversity of passerine birds in the Mountains of Southwest China

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Avian Research 2022年第3期13卷 249-255页

作者： Yongbin Chang Gang Song Dezhi Zhang Chenxi Jia Ping Fan Yan Hao Yanzhu Ji Fumin Lei Key Laboratory of Zoological Systematics and Evolution Institute of ZoologyChinese Academy of SciencesBeijing100101China University of Chinese Academy of Sciences Beijing100049China Center for Excellence in Animal Evolution and Genetics Chinese Academy of SciencesKunming650223China

Genetic diversity is one of the three dimensions of biodiversity and fundamental to various life forms on the *** the distribution pattern of genetic diversity and its driving forces has been an important topic in ecology,biogeography and conservation biology since the last *** investigated the genetic diversity pattern of passerine birds in the Mountains of Southwest China,a global biodiversity hotspot with the highest species richness of birds in the entire Eurasia,and explored the influencing forces of environmental variables on genetic *** compiled 1189 Cytochrome b sequences of 27 passerine species from 152 geographic sites,covering the range of Mountains of Southwest China and its adjoining *** generated genetic diversity distribution maps using a grid-cell method based on nucleotide diversity and haplotype diversity *** further analyzed the variation pattern of the two indices along latitudinal,longitudinal,and elevational *** correlations between the two indices and environmental variables were also *** nucleotide diversity hotspots were mostly located in the southern Hengduan Mountains,while for haplotype diversity,three hotspots were detected:the southeast edge of the Qinghai-Tibetan Plateau,the southern Hengduan Mountains and the Qinling *** was no monotonic increasing or decreasing pattern in nucleotide diversity or haplotype diversity along latitudinal,longitudinal or elevational gradients except for altitudinal *** and model selection analyses detected multiple environmental variables in driving genetic diversity patterns,including temperature,precipitation,vegetation,human influence,longitude and altitude *** to the pattern of species richness,the nucleotide diversity pattern of passerine birds in the Mountains of Southwest China presents a decreasing trend from southwest to northeast,while the haplotype diversity pattern is more likely decreased from we

关键词： Environmental variables Genetic diversity pattern Mountains of Southwest China passerine birds

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Floristic, Structural, and Conservation Analysis of the Habitats Occupied by Dupont’s Lark, Chersophilus duponti, in the Northwest Edge of Its Distributional Range

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Open Journal of Ecology 2016年第9期6卷 517-528页

作者： Juan Luis Aguirre Carlos Talabante Alejandro Aparicio Manuel Peinado Cátedra de Medio Ambiente Departamento de Ciencias de la Vida Universidad de Alcalá Madrid Spain

This paper describes and analyzes floristic, structural and conservation features of the shrubland occupied by Chersophilus duponti in the northwest corner of its world distribution range. This study relates the coverage, floristic composition with estimated lark density in the area. We identified four types of shrublands, three of them varied significantly in floristic composition for the habitats of this species in contrast with those of their world distribution: Cistus ladanifer scrubs;heaths dominated by Ericaceae, and scrubs dominated by the genera Lavandula, Thymus and Cytisus. The fourth type, dominated by aromatic chamaephytes and grass, fits descriptions of the bird’s typical habitat. The areas sampled are subject to different categories of threats, the most significant being the natural succession process due to the cessation of grazing, reforestation measures and the use of flat areas for farmlands or other uses. The density of larks in this area was directly related to coverage-composition of plant community.

关键词： Alaudidae passerine birds Vegetation-birds Relationships Steppe birds Conservation Status

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