NICHE PARTITIONING AND THE COEXISTENCE OF TWO CRYPTIC DICTYOTA (DICTYOTALES, PHAEOPHYCEAE) SPECIES FROM THE CANARY ISLANDS
Ana Tronholm, Marta Sanson, Julio Afonso-Carrillo, Heroen Verbruggen, Olivier de Clerck
JOURNAL OF PHYCOLOGY | WILEY | Published : 2010
Coexistence in a homogeneous environment requires species to specialize in distinct niches. Sympatry of cryptic species is of special interest to both ecologists and evolutionary biologists because the mechanisms that facilitate their persistent coexistence are obscure. In this study, we report on two sympatric Dictyota species, D. dichotoma (Huds.) J. V. Lamour. and the newly described species D. cymatophila sp. nov., from the Canary Islands. Gene sequence data (rbcL, psbA, nad1, cox1, cox3, and LSU rDNA) demonstrate that D. dichotoma and D. cymatophila do not represent sister species. Rather, D. cymatophila and D. dichotoma have converged on a nearly identical morphology, only to be distin..View full abstract
A. T. is indebted to the Agencia Canaria de Investigacion, Innovacion y Sociedad de la Informacion for her PhD grant. We wish to thank Caroline Vlaeminck and Sofie D'hondt for their assistance with the molecular work. The authors wish to extend their gratitude to Robert Clarke for his most helpful comments on multivariate methods and Joe Zuccarello for his constructive criticism on an earlier version of the manuscript. We thank E. Coppejans, T. Cowling, R. Diaz, S. G. A. Draisma, C. Galanza, N. Goldberg, M. Heytens, J. Hollants, J. M. Huisman, I. K. Hwang, W. Kooistra, C. E. Lane, L. Le Gall, F. Leliaert, S. M. Lin, D. Littler, M. Littler, S. Murray, A. N'Yeurt, K. Pauly, D. A. Payo, C. W. Schneider, M. Sole, F. Steen, B. Tronholm, L. Tyberghein, K. Van Nieuwenhuyze, and M. Verlaque for collecting specimens. The authors also express their thanks to Carolina Fumero Hernandez for translating the diagnosis into Latin. H. V. is a postdoctoral fellow of the Research Foundation Flanders.