@article{fdi:010064820,
  title = {{P}alm diversification in two geologically contrasting regions of western {A}mazonia},
  author = {{R}oncal, {J}ulissa and {C}ouderc, {M}arie and {B}aby, {P}atrice and {K}ahn, {F}rancis and {M}illan, {B}. and {M}eerow, {A}. {W}. and {P}intaud, {J}ean-{C}hristophe},
  editor = {},
  language = {{ENG}},
  abstract = {{A}im{T}he subduction of the {N}azca {P}late and the eastward propagation of the {A}ndean orogenic wedge in western {A}mazonia caused the formation of arches or ridges that have influenced the modern configuration of the upper {A}mazon drainage and the diversification of biota. {W}e used a lineage of 15 palm species ({A}strocaryum sect. {H}uicungo, {A}recaceae) to test two biogeographical hypotheses for lowland plants: (1) that vicariance resulted from tectonically mediated geographical barriers (population contraction), and (2) that recurrent dispersal events (population expansion) produced geographical isolation and subsequent speciation. {L}ocation{R}ain forests of {S}outh {A}merica. {M}ethods{A} total of 78 palm individuals were collected in the field, from which five chloroplast and two nuclear {DNA} fragments were sequenced. {W}e reconstructed a {B}ayesian dated phylogeny and inferred the demographic history. {W}e used a {B}ayesian phylogeographical spatial diffusion approach to propose a model of colonization. {R}esults{W}e found a phylogeographical break at c. 5 degrees {S} between two main clades with crown ages of c. 6.7 and 7.3{M}a located in the {F}itzcarrald {A}rch ({FA}) and the subsiding northern {A}mazonian foreland basin ({NAFB}), respectively. {T}hese diversification times were close to the emergence of the {FA} in the late {M}iocene, and the coeval development of the transcontinental modern drainage and sedimentation plain of the {NAFB}. {A}s expected for the recurrent-dispersal hypothesis, lineage delimitations were spatially inconsistent with the location of rivers or ridges, and we found some evidence of past ancestral population expansion supported particularly by the chloroplast sequences. {M}ain conclusions{O}ur results support the biogeographical scenario whereby recurrent dispersal into western {A}mazonia produced spatial isolation of populations, followed by speciation within two areas of contrasting geological activity: tectonic uplift in the {FA} versus subsidence in the {NAFB}. {W}e did not test and cannot rule out ecological speciation within western {A}mazonia or at finer spatial scales.},
  keywords = {{A}recaceae ; {A}strocaryum sect {H}uicungo ; dispersal ; diversification time ; {F}itzcarrald {A}rch ; inter-{A}ndean valleys ; lowland rain forests ; northern {A}mazonian foreland basin ; phylogeography ; vicariance ; {AMAZONE} {BASSIN} ; {ANDES} ; {PEROU} ; {BRESIL} ; {BOLIVIE} ; {COLOMBIE}},
  booktitle = {},
  journal = {{J}ournal of {B}iogeography},
  volume = {42},
  numero = {8},
  pages = {1503--1513},
  ISSN = {0305-0270},
  year = {2015},
  DOI = {10.1111/jbi.12518},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064820},
}