Avian Subspecies : Introduction
نویسندگان
چکیده
منابع مشابه
Are subspecies useful in evolutionary and conservation biology?
The taxonomic rank of subspecies remains highly contentious, largely because traditional subspecies boundaries have sometimes been contradicted by molecular phylogenetic data. The most complete meta-analysis to date, for instance, found that only 3% of traditional avian subspecies represented distinct phylogenetic lineages. However, the global generality of this phenomenon remains unclear due t...
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Subspecies are often used in ways that require their evolutionary independence, for example as proxies for units of conservation. Mitochondrial DNA sequence data reveal that 97% of continentally distributed avian subspecies lack the population genetic structure indicative of a distinct evolutionary unit. Subspecies considered threatened or endangered, some of which have been targets of expensiv...
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Birds have long fascinated scientists and travellers, so their distribution and abundance through time have been better documented than those of other organisms. Many bird species are known to have gone extinct, but information on subspecies extinctions has never been synthesised comprehensively. We reviewed the timing, spatial patterns, trends and causes of avian extinctions on a global scale,...
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Identification of birds not only means identifying the species of an individual, but also can include identifying its subspecies, sex, and age. Field identification of the age and sex of a bird can be important for studying many aspects of avian ecology and evolution, including life history evolution, reproductive ecology, and behavioral ecology. Ornithologists use a variety of characteristics ...
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