期刊
ECOLOGY AND EVOLUTION
卷 5, 期 22, 页码 5329-5343出版社
WILEY
DOI: 10.1002/ece3.1791
关键词
Aegean Archipelago; Campanulaceae; continental islands; drabifolia complex; endemism; Mediterranean; Roucela clade
资金
- National Science Foundation [DEB-0953677]
- Botanical Society of America, Society of Systematic Biologists
- American Society of Plant Taxonomists
- Division Of Environmental Biology
- Direct For Biological Sciences [0953677] Funding Source: National Science Foundation
At the intersection of geological activity, climatic fluctuations, and human pressure, the Mediterranean Basin - a hotspot of biodiversity - provides an ideal setting for studying endemism, evolution, and biogeography. Here, we focus on the Roucela complex (Campanula subgenus Roucela), a group of 13 bellflower species found primarily in the eastern Mediterranean Basin. Plastid and low-copy nuclear markers were employed to reconstruct evolutionary relationships and estimate divergence times within the Roucela complex using both concatenation and species tree analyses. Niche modeling, ancestral range estimation, and diversification analyses were conducted to provide further insights into patterns of endemism and diversification through time. Diversification of the Roucela clade appears to have been primarily the result of vicariance driven by the breakup of an ancient landmass. We found geologic events such as the formation of the mid-Aegean trench and the Messinian Salinity Crisis to be historically important in the evolutionary history of this group. Contrary to numerous past studies, the onset of the Mediterranean climate has not promoted diversification in the Roucela complex and, in fact, may be negatively affecting these species. This study highlights the diversity and complexity of historical processes driving plant evolution in the Mediterranean Basin.
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