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      Nuevos registros de macroalgas para el Atlántico mexicano y riqueza florística del Caribe mexicano Translated title: New records of macroalgae for the Mexican Atlantic and floristic richness of the Mexican Caribbean

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          Abstract

          Se revisaron muestras de macroalgas de un hábitat pocas veces analizado (colindante a la parte basal del tejido vivo de los corales Acropora palmata y Diploria strigosa) y de una zona de México poco conocida florísticamente (parte Sur del Caribe mexicano), con base a lo cual se reporta a Corallophila verongiae (Rhodophyta), Derbesia fastigiata (Chlorophyta) y Hincksia onslowensis (Phaeophyta) como nuevos registros de macroalgas para la costa del Atlántico mexicano. Además, se reporta a Lophosiphonia obscura (Rhodophyta) como nuevo registro para la parte costera continental del Atlántico mexicano, ya que sólo se había registrado hace más de 40 años para Arrecife Alacranes, sitio alejado aproximadamente 180 km al norte de Puerto Progreso, Yucatán. Aunque las especies de macroalgas no presentaron estructuras reproductoras, probablemente por tener crecimiento clonal y estar invadiendo tejido coralino, los caracteres morfológicos permitieron su identificación con certeza. Con excepción de la primera especie, las otras no se habían registrado creciendo sobre corales. Tomando en cuenta estos nuevos registros, el total de especies de macroalgas registradas hasta este estudio para el Caribe mexicano es de 546, incluyendo 307 Rhodophyta, 171 Chlorophyta y 68 Phaeophyta. Esta zona tropical y la costa templada de Baja California conforman las dos zonas florísticas marinas más ricas de México.

          Translated abstract

          Macroalgae samples from a habitat uncommonly analyzed (next to the basal part of live tissue of the corals Acropora palmata and Diploria strigosa), and from a Mexican zone barely known floristically (the southern part of the Mexican Caribbean) were studied. Based on those samples, Corallophila verongiae (Rhodophyta), Derbesia fastigiata (Chlorophyta), and Hincksia onslowensis (Phaeophyta) are recognized as new records for the Mexican Atlantic coast. Similarly, Lophosiphonia obscura (Rhodophyta) is recognized as a new record for the continental coast of the Mexican Atlantic, since the previous solitary record (more than 40 years ago) was from the Alacran reef, in the open ocean, approximately 180 km away from Puerto Progreso, Yucatan. Even though the four macroalgae species were sterile, probably because they have clonal growth and were invading coral tissue, the morphological characters allowed their unequivocal identification. Excepting the first species, the others had not been registered growing on corals. Considering these new records, the total number of macroalgae species registered up to this study for the Mexican Caribbean is 546, including 307 Rhodophyta, 171 Chlorophyta, and 68 Phaeophyta. Both, this tropical Caribbean zone, and the temperate coast of Baja California represent the two richest macroalgae marine zones of Mexico.

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          Effects of algal turfs and sediment on coral settlement.

          Successful settlement and recruitment of corals is critical to the resilience of coral reefs. Given that many degraded reefs are dominated by benthic algae, recovery of coral populations after bleaching and other disturbances requires successful settlement amidst benthic algae. Algal turfs often accumulate sediments, sediments are known to inhibit coral settlement, and reefs with high inputs of terrestrial sediments are often dominated by turfs. We investigated the impacts of two algal turf assemblages, and of sediment deposits, on settlement of the coral Acropora millepora (Ehrenberg). Adding sediment reduced coral settlement, but the effects of different algal turfs varied. In one case, algal turfs inhibited coral settlement, whereas the other turf only inhibited settlement when combined with sediments. These results provide the first direct, experimental evidence of effects of filamentous algal turfs on coral settlement, the variability in those effects, and the potential combined effects of algal turfs and trapped sediments.
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            A Unified Approach to Marine Plant-Herbivore Interactions. II. Biogeography

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              Echinoid grazing as a structuring force in coral communities: Whole reef manipulations

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                hbio
                Hidrobiológica
                Hidrobiológica
                UAM, Unidad Iztapalapa, (México )
                0188-8897
                March 2008
                : 18
                : 1
                : 11-19
                Affiliations
                [1 ] ECOSUR Mexico
                [2 ] Universidad Autónoma Metropolitana Mexico
                Article
                S0188-88972008000100002
                9516dd3b-15e0-43a0-81d7-5797b3361026

                http://creativecommons.org/licenses/by/4.0/

                History
                Categories
                Marine & Freshwater Biology

                Ecology
                Coral reefs,Mexican Caribbean,phycoflora,Yucatan Peninsula,Quintana Roo,Arrecifes de coral,Caribe mexicano,ficoflora,Península de Yucatán

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