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Niche partitioning and the coexistence of two cryptic dictyota (Dictyotales, Phaeophyceae) species from the Canary Islands

(2010) JOURNAL OF PHYCOLOGY. 46(6). p.1075-1087
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Abstract
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 distinguished with detailed morphometric observations. Both species co-occur in eulittoral pools and the shallow subtidal in Tenerife. Even though D. cymatophila was more dominant in wave-exposed places and D. dichotoma in less exposed areas, the spatial distribution of both species overlapped in intermediate habitats. The species display radically different phenologies. D. dichotoma reached its highest density in winter and early spring and disappeared nearly completely in autumn, while D. cymatophila dominated the study site from July until November. The timing of gamete release also differs between both species, D. dichotoma releasing gametes twice every lunar cycle, while the release of gametes in D. cymatophila occurred roughly every other day.
Keywords
MOLECULAR PHYLOGENY, DICHOTOMA DICTYOTALES, INTERTIDAL ZONE, ECOLOGY, PERIODICITY, RHODOPHYTA, DIVERSITY, Canary Islands, cryptic species, Dictyota cymatophila, Dictyota dichotoma, niche partitioning, phenology, reproductive ecology, COMPETITIVE COEXISTENCE, PROCHLOROCOCCUS ECOTYPES, NORTH-ATLANTIC

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Citation

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Chicago
Tronholm, Ana, Marta Sanson, Julio Afonso-Carrillo, Heroen Verbruggen, and Olivier De Clerck. 2010. “Niche Partitioning and the Coexistence of Two Cryptic Dictyota (Dictyotales, Phaeophyceae) Species from the Canary Islands.” Journal of Phycology 46 (6): 1075–1087.
APA
Tronholm, A., Sanson, M., Afonso-Carrillo, J., Verbruggen, H., & De Clerck, O. (2010). Niche partitioning and the coexistence of two cryptic dictyota (Dictyotales, Phaeophyceae) species from the Canary Islands. JOURNAL OF PHYCOLOGY, 46(6), 1075–1087.
Vancouver
1.
Tronholm A, Sanson M, Afonso-Carrillo J, Verbruggen H, De Clerck O. Niche partitioning and the coexistence of two cryptic dictyota (Dictyotales, Phaeophyceae) species from the Canary Islands. JOURNAL OF PHYCOLOGY. 2010;46(6):1075–87.
MLA
Tronholm, Ana, Marta Sanson, Julio Afonso-Carrillo, et al. “Niche Partitioning and the Coexistence of Two Cryptic Dictyota (Dictyotales, Phaeophyceae) Species from the Canary Islands.” JOURNAL OF PHYCOLOGY 46.6 (2010): 1075–1087. Print.
@article{1246495,
  abstract     = {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 distinguished with detailed morphometric observations. Both species co-occur in eulittoral pools and the shallow subtidal in Tenerife. Even though D. cymatophila was more dominant in wave-exposed places and D. dichotoma in less exposed areas, the spatial distribution of both species overlapped in intermediate habitats. The species display radically different phenologies. D. dichotoma reached its highest density in winter and early spring and disappeared nearly completely in autumn, while D. cymatophila dominated the study site from July until November. The timing of gamete release also differs between both species, D. dichotoma releasing gametes twice every lunar cycle, while the release of gametes in D. cymatophila occurred roughly every other day.},
  author       = {Tronholm, Ana and Sanson, Marta and Afonso-Carrillo, Julio and Verbruggen, Heroen and De Clerck, Olivier},
  issn         = {0022-3646},
  journal      = {JOURNAL OF PHYCOLOGY},
  keyword      = {MOLECULAR PHYLOGENY,DICHOTOMA DICTYOTALES,INTERTIDAL ZONE,ECOLOGY,PERIODICITY,RHODOPHYTA,DIVERSITY,Canary Islands,cryptic species,Dictyota cymatophila,Dictyota dichotoma,niche partitioning,phenology,reproductive ecology,COMPETITIVE COEXISTENCE,PROCHLOROCOCCUS ECOTYPES,NORTH-ATLANTIC},
  language     = {eng},
  number       = {6},
  pages        = {1075--1087},
  title        = {Niche partitioning and the coexistence of two cryptic dictyota (Dictyotales, Phaeophyceae) species from the Canary Islands},
  url          = {http://dx.doi.org/10.1111/j.1529-8817.2010.00912.x},
  volume       = {46},
  year         = {2010},
}

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