Biological responses of the coral Montastraea annularis to the removal of filamentous turf algae.
作者： Neidy P. Cetz-Navarro , Julio Espinoza-Avalos , Héctor A. Hernández-Arana , Juan P. Carricart-Ganivet
DOI: 10.1371/JOURNAL.PONE.0054810
关键词:
摘要: Coral reef degradation increases coral interactions with filamentous turf algae (FTA) and macroalgae, which may result in chronic stress for the corals. We evaluated effects of short (2.5 month) long (10 periods FTA removal on tissue thickness (TT), zooxanthellae density (ZD), mitotic index (MI), concentration chlorophyll a (Chl a) Montastraea annularis at beginning end gametogenesis. Ramets (individual lobes within colony) consistently surrounded by ramets crustose coralline (CCA) were used as controls. reduced stress, indicated increased TT ZD lower MI. The measured similar magnitude algal removal. more stressed gametogenesis compared beginning, Chl cm−2, higher However, it was not possible to distinguish caused presence from that seasonal changes seawater temperature. CCA showed less comparison FTA: TT, cm−2 ZD, MI values. responses suffered most deleterious contrasted those CCA. According published studies our observations, there could be least six mechanisms associated M. FTA. Owing high cover (in contrast macroalgae CCA) Caribbean, overgrowth mortality this functional group can cause species complex, further decline important reef-building Caribbean is expected.
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