Journal article
Why is Amazonia a 'source' of biodiversity? Climate-mediated dispersal and synchronous speciation across the Andes in an avian group (Tityrinae)
Proceedings of the Royal Society. B, Biological sciences, v 286(1900)
10 Apr 2019
PMID: 30940057
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Abstract
Amazonia is a 'source' of biodiversity for other Neotropical ecosystems, but which conditions trigger in situ speciation and emigration is contentious. Three hypotheses for how communities have assembled include (1) a stochastic model wherein chance dispersal events lead to gradual emigration and species accumulation, (2) diversity-dependence wherein successful dispersal events decline through time due to ecological limits, and (3) barrier displacement wherein environmental change facilitates dispersal to other biomes via transient habitat corridors. We sequenced thousands of molecular markers for the Neotropical Tityrinae (Aves) and applied a novel filtering protocol to identify loci with high utility for dated phylogenomics. We used these loci to estimate divergence times and model Tityrinae's evolutionary history. We detected a prominent role for speciation driven by barriers including synchronous speciation across the Andes and found that dispersal increased toward the present. Because diversification was continuous but dispersal was non-random over time, we show that barrier displacement better explains Tityrinae's history than stochasticity or diversity-dependence. We propose that Amazonia is a source of biodiversity because (1) it is a relic of a biome that was once more extensive, (2) environmentally mediated corridors facilitated emigration and (3) constant diversification is attributed to a spatially heterogeneous landscape that is perpetually dynamic through time.
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Details
- Title
- Why is Amazonia a 'source' of biodiversity? Climate-mediated dispersal and synchronous speciation across the Andes in an avian group (Tityrinae)
- Creators
- Lukas J. Musher - American Museum of Natural HistoryMateus Ferreira - National Institute of Amazonian ResearchAnya L. Auerbach - University of ChicagoJessica McKay - American Museum of Natural HistoryJoel Cracraft - American Museum of Natural History
- Publication Details
- Proceedings of the Royal Society. B, Biological sciences, v 286(1900)
- Publisher
- The Royal Society
- Number of pages
- 9
- Grant note
- 1241066 / NSF/NASA; National Science Foundation (NSF); National Aeronautics & Space Administration (NASA) 2012/50260-6 / FAPESP; Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) 1146248 / Division Of Environmental Biology; Direct For Biological Sciences; National Science Foundation (NSF); NSF - Directorate for Biological Sciences (BIO) 8881.133440/2016-01 / CAPES PDSE; Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) 1146248 / NSF; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Ornithology
- Web of Science ID
- WOS:000465482600002
- Scopus ID
- 2-s2.0-85064196392
- Other Identifier
- 991022048280304721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Biology
- Ecology
- Evolutionary Biology