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Santamaria CA, Mateos M, DeWitt TJ, et al. Constrained body shape among highly genetically divergent allopatric lineages of the supralittoral isopod Ligia occidentalis (Oniscidea). Ecol Evol. 2016;6(5):1537-54doi: 10.1002/ece3.1984.
Santamaria, C. A., Mateos, M., DeWitt, T. J., & Hurtado, L. A. (2016). Constrained body shape among highly genetically divergent allopatric lineages of the supralittoral isopod Ligia occidentalis (Oniscidea). Ecology and evolution, 6(5), 1537-54. https://doi.org/10.1002/ece3.1984
Santamaria, Carlos A, et al. "Constrained body shape among highly genetically divergent allopatric lineages of the supralittoral isopod Ligia occidentalis (Oniscidea)." Ecology and evolution vol. 6,5 (2016): 1537-54. doi: https://doi.org/10.1002/ece3.1984
Santamaria CA, Mateos M, DeWitt TJ, Hurtado LA. Constrained body shape among highly genetically divergent allopatric lineages of the supralittoral isopod Ligia occidentalis (Oniscidea). Ecol Evol. 2016 Feb 09;6(5):1537-54. doi: 10.1002/ece3.1984. eCollection 2016 Mar. PMID: 26900449; PMCID: PMC4747314.
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Ecol Evol. 2016 Feb 09;6(5):1537-54. doi: 10.1002/ece3.1984. eCollection 2016 Mar.

Constrained body shape among highly genetically divergent allopatric lineages of the supralittoral isopod Ligia occidentalis (Oniscidea).

Ecology and evolution

Carlos A Santamaria, Mariana Mateos, Thomas J DeWitt, Luis A Hurtado

Affiliations

  1. Department of Wildlife and Fisheries Sciences Texas A&M University College Station Texas; Biology Faculty College of Arts and Sciences University of South Florida Sarasota-Manatee Sarasota Florida.
  2. Department of Wildlife and Fisheries Sciences Texas A&M University College Station Texas.

PMID: 26900449 PMCID: PMC4747314 DOI: 10.1002/ece3.1984

Abstract

Multiple highly divergent lineages have been identified within Ligia occidentalis sensu lato, a rocky supralittoral isopod distributed along a ~3000 km latitudinal gradient that encompasses several proposed marine biogeographic provinces and ecoregions in the eastern Pacific. Highly divergent lineages have nonoverlapping geographic distributions, with distributional limits that generally correspond with sharp environmental changes. Crossbreeding experiments suggest postmating reproductive barriers exist among some of them, and surveys of mitochondrial and nuclear gene markers do not show evidence of hybridization. Populations are highly isolated, some of which appear to be very small; thus, the effects of drift are expected to reduce the efficiency of selection. Large genetic divergences among lineages, marked environmental differences in their ranges, reproductive isolation, and/or high isolation of populations may have resulted in morphological differences in L. occidentalis, not detected yet by traditional taxonomy. We used landmark-based geometric morphometric analyses to test for differences in body shape among highly divergent lineages of L. occidentalis, and among populations within these lineages. We analyzed a total of 492 individuals from 53 coastal localities from the southern California Bight to Central Mexico, including the Gulf of California. We conducted discriminant function analyses (DFAs) on body shape morphometrics to assess morphological variation among genetically differentiated lineages and their populations. We also tested for associations between phylogeny and morphological variation, and whether genetic divergence is correlated to multivariate morphological divergence. We detected significant differences in body shape among highly divergent lineages, and among populations within these lineages. Nonetheless, neither lineages nor populations can be discriminated on the basis of body shape, because correct classification rates of cross-validated DFAs were low. Genetic distance and phylogeny had weak to no effect on body shape variation. The supralittoral environment appears to exert strong stabilizing selection and/or strong functional constraints on body shape in L. occidentalis, thereby leading to morphological stasis in this isopod.

Keywords: Allometry; Oniscidea; body shape; coastal biodiversity; cryptic species; leave‐one‐out cross‐validation; test of phylogenetic signal

References

  1. Development. 1999 Mar;126(6):1091-101 - PubMed
  2. Nature. 1999 Oct 28;401(6756):877-84 - PubMed
  3. Evolution. 2003 Apr;57(4):717-45 - PubMed
  4. Nature. 1992 Aug 13;358(6387):578-81 - PubMed
  5. Am Nat. 2004 Sep;164(3):335-49 - PubMed
  6. Trends Ecol Evol. 2007 Mar;22(3):148-55 - PubMed
  7. Syst Biol. 2007 Apr;56(2):252-70 - PubMed
  8. Ecology. 2007 Apr;88(4):853-63 - PubMed
  9. Bioinformatics. 2008 Jan 1;24(1):129-31 - PubMed
  10. Ecology. 2008 Dec;89(12):3462-71 - PubMed
  11. PLoS One. 2009 Jul 09;4(7):e6173 - PubMed
  12. Zoolog Sci. 2009 Apr;26(4):301-8 - PubMed
  13. Evolution. 2010 Jul;64(7):2173-8 - PubMed
  14. Bioinformatics. 2010 Jun 1;26(11):1463-4 - PubMed
  15. PLoS One. 2010 Jul 21;5(7):e11633 - PubMed
  16. Evolution. 2010 Jul;64(7):1865-84 - PubMed
  17. Proc Biol Sci. 2011 Apr 7;278(1708):1003-8 - PubMed
  18. J Evol Biol. 2011 Aug;24(8):1826-35 - PubMed
  19. PLoS One. 2013 Jul 02;8(7):e67827 - PubMed
  20. PLoS One. 2013 Dec 30;8(12):e85199 - PubMed
  21. Syst Biol. 2014 Jul;63(4):518-33 - PubMed
  22. PLoS One. 2014 Apr 15;9(4):e94081 - PubMed
  23. Ecotoxicol Environ Saf. 2015 Feb;112:177-85 - PubMed
  24. PLoS One. 2015 Apr 08;10(4):e0122407 - PubMed
  25. PLoS One. 2015 May 12;10(5):e0127043 - PubMed
  26. Zookeys. 2015 Jul 30;(515):13-25 - PubMed
  27. J Morphol. 2015 Nov;276(11):1283-9 - PubMed
  28. J Evol Biol. 2015 Dec;28(12):2318-36 - PubMed
  29. Oecologia. 1993 Dec;96(3):316-323 - PubMed
  30. Evolution. 1982 May;36(3):474-498 - PubMed

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