RT info:eu-repo/semantics/article
T1 Niche partitioning and the coexistence of two cryptic Dictyota (Dictyotales, Phaeophyceae) species from the Canary Islands
A1 Afonso Carrillo, Julio
A1 Tronholm, Ana
A1 Sansón Acedo, Marta
A1 Verbruggen, Heroen
A1 De Clerck, Olivier
A2 BotánicaEcología y Fisiología Vegetal
A2 Botánica Marina
AB Coexistence in a homogeneous environmentrequires species to specialize in distinct niches.Sympatry of cryptic species is of special interest toboth ecologists and evolutionary biologists becausethe mechanisms that facilitate their persistent coexistence are obscure. In this study, we report on twosympatric Dictyota species, D. dichotoma (Huds.)J. V. Lamour. and the newly described speciesD. cymatophila sp. nov., from the Canary Islands.Gene sequence data (rbcL, psbA, nad1, cox1, cox3,and LSU rDNA) demonstrate that D. dichotoma andD. cymatophila do not represent sister species.Rather, D. cymatophila and D. dichotoma have converged on a nearly identical morphology, only to bedistinguished with detailed morphometric observations. Both species co-occur in eulittoral poolsand the shallow subtidal in Tenerife. Even thoughD. cymatophila was more dominant in wave-exposedplaces and D. dichotoma in less exposed areas, thespatial distribution of both species overlapped inintermediate habitats. The species display radicallydifferent phenologies. D. dichotoma reached itshighest density in winter and early spring anddisappeared nearly completely in autumn, whileD. cymatophila dominated the study site from July untilNovember. The timing of gamete release also differsbetween both species, D. dichotoma releasing gametestwice every lunar cycle, while the release of gametesin D. cymatophila occurred roughly every other day
PB Phycological Society of America
YR 2010
FD 2010
LK http://riull.ull.es/xmlui/handle/915/28259
UL http://riull.ull.es/xmlui/handle/915/28259
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 20-dic-2024