Abstract：
:The accumulation of vast numbers of molecular phylogenetic studies has contributed to huge knowledge gains in the evolutionary history of birds. This permits subsequent analyses of avian diversity, such as how and why diversification varies across the globe and among taxonomic groups. However, available genetic data for these meta-analyses are unevenly distributed across different geographic regions and taxonomic groups. To comprehend the impact of this variation on the interpretation of global diversity patterns, I examined the availability of genetic data for possible biases in geographic and taxonomic sampling of birds. I identified three main disparities of sampling that are geographically associated with latitude (temperate, tropical), hemispheres (East, West), and range size. Tropical regions, which host the vast majority of species, are substantially less studied. Moreover, Eastern regions, such as the Old World Tropics and Australasia, stand out as being disproportionately undersampled, with up to half of communities not being represented in recent studies. In terms of taxonomic discrepancies, a majority of genetically undersampled clades are exclusively found in tropical regions. My analysis identifies several disparities in the key regions of interest of global diversity analyses. Differential sampling can have considerable impacts on these global comparisons and call into question recent interpretations of latitudinal or hemispheric differences of diversification rates. Moreover, this review pinpoints understudied regions whose biota are in critical need of modern systematic analyses.
journal_name
Mol Phylogenet Evoljournal_title
Molecular phylogenetics and evolutionauthors
Reddy Sdoi
10.1016/j.ympev.2014.04.023subject
Has Abstractpub_date
2014-08-01 00:00:00pages
159-65eissn
1055-7903issn
1095-9513pii
S1055-7903(14)00151-1journal_volume
77pub_type
杂志文章,评审abstract：:Mountains of continental Greece are one of the main Mediterranean biodiversity hotspots, very rich in endemic species. The speciation in this area might have resulted from two main factors: a complex orography and its role as a refugium during past glaciations. We have investigated genetic diversity and population str...
journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
pub_type： 杂志文章
doi：10.1016/j.ympev.2014.08.023
更新日期：2014-12-01 00:00:00
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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