@article{fdi:010066929,
  title = {{S}hift in precipitation regime promotes interspecific hybridization of introduced {C}offea species},
  author = {{G}omez, {C}{\'e}line and {D}espinoy, {M}arc and {H}amon, {S}erge and {H}amon, {P}erla and {S}almon, {D}. and {A}kaffou, {D}. {S}. and {L}egnate, {H}. and {K}ochko, {A}lexandre de and {M}angeas, {M}organ and {P}oncet, {V}al{\'e}rie},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he frequency of plant species introductions has increased in a highly connected world, modifying species distribution patterns to include areas outside their natural ranges. {T}hese introductions provide the opportunity to gain new insight into the importance of flowering phenology as a component of adaptation to a new environment. {T}hree {C}offea species, {C}. arabica, {C}. canephora ({R}obusta), and {C}. liberica, native to intertropical {A}frica have been introduced to {N}ew {C}aledonia. {O}n this archipelago, a secondary contact zone has been characterized where these species coexist, persist, and hybridize spontaneously. {W}e investigated the impact of environmental changes undergone by each species following its introduction in {N}ew {C}aledonia on flowering phenology and overcoming reproductive barriers between sister species. {W}e developed species distribution models and compared both environmental envelopes and climatic niches between native and introduced hybrid zones. {F}lowering phenology was monitored in a population in the hybrid zone along with temperature and precipitation sequences recorded at a nearby weather station. {T}he extent and nature of hybridization events were characterized using chloroplast and nuclear microsatellite markers. {T}he three {C}offea species encountered weak environmental suitability compared to their native ranges when introduced to {N}ew {C}aledonia, especially {C}. arabica and {C}. canephora. {T}he niche of the {N}ew {C}aledonia hybrid zone was significantly different from all three species' native niches based on identity tests ({I} {S}imilarity and {D} {S}choener's {S}imilarity {I}ndexes). {T}his area appeared to exhibit intermediate conditions between the native conditions of the three species for temperature-related variables and divergent conditions for precipitation-related ones. {F}lowering pattern in these {C}offea species was shown to have a strong genetic component that determined the time between the triggering rain and anthesis (flower opening), specific to each species. {H}owever, a precipitation regime different from those in {A}frica was directly involved in generating partial flowering overlap between species and thus in allowing hybridization and interspecific gene flow. {I}nterspecific hybrids accounted for 4% of the mature individuals in the sympatric population and occurred between each pair of species with various level of introgression. {A}daptation to new environmental conditions following introduction of {C}offea species to {N}ew {C}aledonia has resulted in a secondary contact between three related species, which would not have happened in their native ranges, leading to hybridization and gene flow.},
  keywords = {{A}daptation ; bioclimatic envelope ; climate change ; {C}offea ; flowering ; phenology ; hybrid zone ; introduction ; {N}ew {C}aledonia ; niche ; precipitation ; {NOUVELLE} {CALEDONIE}},
  booktitle = {},
  journal = {{E}cology and {E}volution},
  volume = {6},
  numero = {10},
  pages = {3240--3255},
  ISSN = {2045-7758},
  year = {2016},
  DOI = {10.1002/ece3.2055},
  URL = {https://www.documentation.ird.fr/hor/fdi:010066929},
}