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The abiotic and biotic drivers of rapid diversification in Andean bellflowers (Campanulaceae)

Författare och institution:
L. P. Lagomarsino (-); Fabien L. Condamine (Institutionen för biologi och miljövetenskap); Alexandre Antonelli (Institutionen för biologi och miljövetenskap); A. Mulch (-); C. C. Davis (-)
Publicerad i:
New Phytologist, 210 ( 4 ) s. 1430-1442
Artikel, refereegranskad vetenskaplig
Sammanfattning (abstract):
The tropical Andes of South America, the world's richest biodiversity hotspot, are home to many rapid radiations. While geological, climatic, and ecological processes collectively explain such radiations, their relative contributions are seldom examined within a single clade. We explore the contribution of these factors by applying a series of diversification models that incorporate mountain building, climate change, and trait evolution to the first dated phylogeny of Andean bellflowers (Campanulaceae: Lobelioideae). Our framework is novel for its direct incorporation of geological data on Andean uplift into a macroevolutionary model. We show that speciation and extinction are differentially influenced by abiotic factors: speciation rates rose concurrently with Andean elevation, while extinction rates decreased during global cooling. Pollination syndrome and fruit type, both biotic traits known to facilitate mutualisms, played an additional role in driving diversification. These abiotic and biotic factors resulted in one of the fastest radiations reported to date: the centropogonids, whose 550 species arose in the last 5 million yr. Our study represents a significant advance in our understanding of plant evolution in Andean cloud forests. It further highlights the power of combining phylogenetic and Earth science models to explore the interplay of geology, climate, and ecology in generating the world's biodiversity.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
Geovetenskap och miljövetenskap
Andes, biodiversity hotspot, climate change, diversification, Lobelioideae, Neotropics, pollination syndromes, rapid radiation, vascular plant diversity, molecular phylogenies, adaptive radiation, species diversification, historical biogeography, isotope evidence, floral isolation, surface uplift, northern andes, climate-change, Plant Sciences
Postens nummer:
Posten skapad:
2016-07-28 16:25

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