Dataset
Data from: Why is Amazonia a ‘source’ of biodiversity? climate-mediated dispersal and synchronous speciation across the Andes in an avian group (Tityrinae)
14 Mar 2019
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
- Data from: 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 - Instituto Nacional de Pesquisas da AmazôniaAnya L. Auerbach - University of ChicagoJessica McKay - American Museum of Natural HistoryJoel Cracraft - American Museum of Natural History
- Publisher
- Dryad
- Grant note
- NSF/NASA 1241066, NSF 1146248, FAPESP 2012/50260-6 / National Science Foundation (https://ror.org/021nxhr62)
- Resource Type
- Dataset
- Language
- English
- Academic Unit
- Ornithology
- Other Identifier
- 991022048369604721