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Guanyang (GY) Zhang @GYZhang2
Usmaan Barashat, Nick Matzke & Nico Franz
Arizona State University
taxonbytes.org somanyinse...
 Model-based biogeographic inference methods (e.g.,
DEC, DIVA, BayArea) assume certain range-evolution
processes.
Dispers...
 Model-based biogeographic inference methods (e.g.,
DEC, DIVA, BayArea) assume certain range-evolution
processes.
Dispers...
 Model-based biogeographic inference methods (e.g.,
DEC, DIVA, BayArea) assume certain range-evolution
processes.
Process...
 Model-based biogeographic inference methods (e.g.,
DEC, DIVA, BayArea) assume certain range-evolution
processes.
Process...
 Matzke (2014 Syst Biol) added founder-event speciation
process into existing models of geographic range
evolution.
Found...
 BioGeoBEARS implements several models, adds
founder-event jump dispersal (J) and enables model
selection.
Different biog...
 High levels of diversity and single-island endemicity in the
Caribbean.
 Ideal for testing for founder-event speciation...
 65 ingroup species, 26 outgroup.
 Sampled major Greater Antillean
islands, Lesser Antilles, and
Central America.
 6 ge...
 What are the effects of modeling founder-event jump
dispersal (J) on ancestral range evolution estimation?
 Most probab...
 What are the effects of modeling founder-event jump
dispersal (J) on ancestral range evolution estimation?
 Most probab...
 Do biogeographic models with founder-event
jump dispersal (J) provide a better fit?
Model
Parameter estimates
Likelihood...
 Inter-island dispersal and within-area in situ
diversification were the main drivers of speciation.
Jump dispersal occur...
 Neotropical mainland was colonized by Caribbean
island species in the early Miocene (~18 MYA)
Caribbean Central America
 Current finding corroborates an emerging idea that
islands can serve as a source for continental diversity.
Bellemain & ...
 Biogeographic patterns in Caribbean weevils are
reminiscent of those found in Caribbean Anolis lizards,
frogs and snakes...
 Biogeographic patterns in Caribbean weevils are
reminiscent of those found in Caribbean Anolis lizards,
frogs and snakes...
 NSF DEB-1155984
 USDA (Agreement No. 58-1275-1-
335
 Anyi Mazo Vargas, Dr. Robert
Anderson (sequences/specimens)
 Dr....
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Biogeography of Caribbean weevils highlights the importance of founder-event speciation - Guanyang Zhang

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Presented at the Society for Systematic Biologists 2015 Standalone Meeting, Ann Arbor, Michigan on 05/21/2015.

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Biogeography of Caribbean weevils highlights the importance of founder-event speciation - Guanyang Zhang

  1. 1. Guanyang (GY) Zhang @GYZhang2 Usmaan Barashat, Nick Matzke & Nico Franz Arizona State University taxonbytes.org somanyinsects.org Society for Systematic Biologists 2015 Standalone Meeting, Ann Arbor, Michigan 05/21/2015 © Carlos De Soto Molinari
  2. 2.  Model-based biogeographic inference methods (e.g., DEC, DIVA, BayArea) assume certain range-evolution processes. Dispersal Process Before After Ranges Modified from Matzke (2013) Frontiers of Biogeography A A B B A, B—area
  3. 3.  Model-based biogeographic inference methods (e.g., DEC, DIVA, BayArea) assume certain range-evolution processes. Dispersal Process Before After Ranges Modified from Matzke (2013) Frontiers of Biogeography Extinction A A A A B B B B A, B—area
  4. 4.  Model-based biogeographic inference methods (e.g., DEC, DIVA, BayArea) assume certain range-evolution processes. Process Before After Ranges Modified from Matzke (2013) Frontiers of Biogeography Range copying/ Sympatry A A A Tree A A A A, B—area
  5. 5.  Model-based biogeographic inference methods (e.g., DEC, DIVA, BayArea) assume certain range-evolution processes. Process Before After Ranges Modified from Matzke (2013) Frontiers of Biogeography Vicariance A B AB B B BA A A Tree A, B—area
  6. 6.  Matzke (2014 Syst Biol) added founder-event speciation process into existing models of geographic range evolution. Founder-event speciation/ Jump dispersal (+J) DEC—Dispersal-Extinction-Cladogenesis (Ree et al., 2005; Ree & Smith, 2008) DIVA—DIspersal-Vicariance Analysis (Ronquist, 1997) BayArea—Bayesian biogeographic analysis (Landis et al., 2013) A A B B Process Before After Ranges Tree A B A
  7. 7.  BioGeoBEARS implements several models, adds founder-event jump dispersal (J) and enables model selection. Different biogeographic models (DIVA, DEC, BayArea, BioGeoBEARS supermodel) allow a certain set of biogeographic processes. BioGeoBEARS specifies each process with a parameter that can be turned on or off, including “jump dispersal (j)”. Matzke (2013) Frontiers of Biogeography Processes Models BioGeo BEARS
  8. 8.  High levels of diversity and single-island endemicity in the Caribbean.  Ideal for testing for founder-event speciation & studying Caribbean biogeography. • Curculionidae: Entiminae (broad-noses) • Generalist plant-feeders • Larvae (aka caterpillar) live in soil • Caribbean: ~85 species; >95% endemic • Central America: ~47 spp. • South America: ~12 spp. E. nicaraguensis Bovie E. quadrivittatus (Olivier) E. quinquedecimpunctatus (Olivier) E. roseipes (Chevrolat) Images and specimen data @
  9. 9.  65 ingroup species, 26 outgroup.  Sampled major Greater Antillean islands, Lesser Antilles, and Central America.  6 genes, ~4800 bp.  Phylogenetic reconstruction and fossil-calibrated molecular dating with BEAST v1.8 .  Three fossil calibration points
  10. 10.  What are the effects of modeling founder-event jump dispersal (J) on ancestral range evolution estimation?  Most probable ancestral ranges were inferred to be a single area. DIVA+J DIVA (w/o J) Ancestral ranges as a single area Ancestral ranges widespread at some nodes
  11. 11.  What are the effects of modeling founder-event jump dispersal (J) on ancestral range evolution estimation?  Most probable ancestral ranges were inferred to be a single area.  Jump dispersal accounted for virtually all range evolution events. DIVA+JDIVA+J Dispersal Sympatry (subset) Vicariance Vicariance Vicariance Extinction A variety of range-evolution processes Jump dispersal DIVA (w/o J) Only jump dispersal was inferred
  12. 12.  Do biogeographic models with founder-event jump dispersal (J) provide a better fit? Model Parameter estimates Likelihood- ratio test Ln L d e j P DIVALIKE -163.1 0.0052 0.0010 0.000 DIVALIKE+J -115.4 0.0000 0.0000 0.063 1.5E-22 Parameter estimates Likelihood- ratio test AIC analysis Ln L d e j P weight ratio -163.1 0.0052 0.0010 0.000 -115.4 0.0000 0.0000 0.063 1.5E-22 2.02E+20 Strong support from statistical tests Adding jump dispersal led to much higher log likelihood
  13. 13.  Inter-island dispersal and within-area in situ diversification were the main drivers of speciation. Jump dispersal occurred at 25% of all ancestral nodes (n=64), and range-copying (viz. in situ diversification) ~75%. Cuba Cuba (in situ diversification) 25 MYA
  14. 14.  Neotropical mainland was colonized by Caribbean island species in the early Miocene (~18 MYA) Caribbean Central America
  15. 15.  Current finding corroborates an emerging idea that islands can serve as a source for continental diversity. Bellemain & Ricklefs (2008) TREE
  16. 16.  Biogeographic patterns in Caribbean weevils are reminiscent of those found in Caribbean Anolis lizards, frogs and snakes.  Extensive in situ diversification, limited inter-island dispersal and/or island-continent reverse colonization. Alföldi et al. (2011) Nature MainlandCaribbean Caribbean 93-species Anolis phylogeny
  17. 17.  Biogeographic patterns in Caribbean weevils are reminiscent of those found in Caribbean Anolis lizards, frogs and snakes. Heinicke, Duellman & Hedges (2007) PNAS - eleutherodactyline frogs Hedges, Couloux & Vidal (2009) Zotaxa - alsophiine snakes Credit: M. Lammertink http://science.psu.edu/ Credit: S. B. HedgeS
  18. 18.  NSF DEB-1155984  USDA (Agreement No. 58-1275-1- 335  Anyi Mazo Vargas, Dr. Robert Anderson (sequences/specimens)  Dr. Steve Davis (AMNH), Dr. Conrad Labandeira (USNM) (fossils)  Albert Deler Hernandez, Franklyn Cala Riquelme (field assistance in Cuba)

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