期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 106, 期 6, 页码 1863-1868出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0809861105
关键词
diversification rate; speciation; Zosterops; white-eye; evolution
资金
- National Geographic Society [CRE 7464-03]
- National Science Foundation [DEB-0743576]
- University of Kansas General Research Fund
- F. M. Chapman Memorial Fund
- American Museum of Natural History
- University of Washington Burke Museum of Natural History
- Direct For Biological Sciences
- Division Of Environmental Biology [0743576] Funding Source: National Science Foundation
Factors that influence speciation rates among groups of organisms are integral to deciphering macroevolutionary processes; however, they remain poorly understood. Here, we use molecular phylogenetic data and divergence time estimates to reconstruct the pattern and tempo of speciation within a widespread and homogeneous bird family (white-eyes, Zosteropidae) that contains an archetypal great speciator.'' Our analyses show that the majority of this species-rich family constitutes a clade that arose within the last 2 million years, yielding a per-lineage diversification rate among the highest reported for vertebrates (1.95-2.63 species per million years). However, unlike most rapid radiations reported to date, this burst of diversification was not limited in geographic scope, but instead spanned the entire Old World tropics, parts of temperate Asia, and numerous Atlantic, Pacific, and Indian Ocean archipelagos. The tempo and geographic breadth of this rapid radiation defy any single diversification paradigm, but implicate a prominent role for lineage-specific life-history traits (such as rapid evolutionary shifts in dispersal ability) that enabled white-eyes to respond rapidly and persistently to the geographic drivers of diversification.
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