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Geographical variation in the diatom communities associated with loggerhead sea turtles (Caretta caretta)
Van de Vijver, B.; Robert, K.; Majewska, R.; Frankovich, T.A.; Panagopoulou, A.; Bosak, S. (2020). Geographical variation in the diatom communities associated with loggerhead sea turtles (Caretta caretta). PLoS One 15(7): e0236513. https://dx.doi.org/10.1371/journal.pone.0236513
In: PLoS One. Public Library of Science: San Francisco. ISSN 1932-6203; e-ISSN 1932-6203, meer
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| Trefwoorden |
Caretta caretta (Linnaeus, 1758) [WoRMS]
Marien/Kust |
| Auteurs | | Top |
- Van de Vijver, B.
- Robert, K.
- Majewska, R.
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- Frankovich, T.A.
- Panagopoulou, A.
- Bosak, S.
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| Abstract |
Epizoic diatoms form an important part of micro-epibiota of marine vertebrates such as whales and sea turtles. The present study explores and compares the diversity and biogeography of diatom communities growing on the skin and shell of loggerhead sea turtles (Caretta caretta) from four different localities: Adriatic Sea (Croatia), Ionian Sea (Greece), South Africa and Florida Bay (USA) using both light and scanning electron microscopy. We observed almost 400 diatom taxa belonging to more than 100 genera. Diatom communities from Greece and Croatia showed the highest similarity and were statistically different from those recorded from South Africa and Florida. Part of this variation could be attributed to differences in sampling techniques; however, we believe that geography had an important role. In general, contrary to several previous observations from sea turtles, the presumably exclusively epizoic diatoms contributed less than common benthic taxa to the total diatom flora, which might have been related to the loggerhead feeding behavior. Moreover, skin samples differed from carapace samples in having a distinct diatom composition with a higher proportion of the putative true epizoonts. Our results indicate that epizoic diatom communities differ according to loggerhead geographical location and substrate (skin vs. carapace). The relative abundances of common benthic diatoms and putative exclusive epizoic taxa may inform about sea turtle habitat use or behavior though detailed comparisons among different host species have yet to be performed. |
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