caa a22 4500 378854100 CHVBK 20180305123330.0 cr unu---uuuuu 161128e20030905xx s 000 0 eng 10.1515/BOT.2003.041 doi (NATIONALLICENCE)gruyter-10.1515/BOT.2003.041 Structure of the Macroalgal Community Associated with the Seagrass Halodule wrightii Ascherson in the Abrolhos Marine National Park, Brazil [Elektronische Daten] [A. F. de Paula, M. A. de O. Figueiredo, J. C. Creed] The Abrolhos region of Brazil is recognized for its ecological importance and richness of endemic species. Between Redonda and Siriba, two small islands in the Abrolhos archipelago, there are dense populations of macroalgae associated with seagrass (Halodule wrightii) beds. Samples of the community were collected by SCUBA divers in August and December 1995 and April 1996. Forty-nine taxa of macroalgae were found associated with the seagrass at the study site. Nine macroalgae were recorded for the first time for the Abrolhos National Marine Park and four taxa are reported for the first time for Bahia State. Macroalgae were found growing on dead corals and rocks, as epiphytes on incrusting calcareous algae (rhodoliths or maerls), as epiphytes on Udotea flabellum, episamic, or growing unattached. In terms of richness per substratum: unattached > on calcareous algae, epilithic or on Udotea > episamic. In terms of biomass per substratum: episamic > unattached > on Udotea > epilithic > on calcareous algae. No significant differences in richness were found between times, but macroalgal diversity and evenness were greater in August 1995 than at other times. The seagrass biomass did not vary seasonally but the seaweed biomass did. Seagrass was the largest component of macrophyte biomass in August 1995 and April 1996. However, in December 1995 macroalgal biomass was double that of the seagrass and was significantly higher than in August 1995. Rhodophyta was the richest division > Phaeophyta > Chlorophyta. The macroalgal community in the seagrass beds at Abrolhos was considered to be rich and diverse and contained a disproportionately high number of taxa of Phaeophyta (19%), when compared to the whole Brazilian flora. Copyright © 2003 by Walter de Gruyter GmbH & Co. KG Hydrobiology nationallicence Mycology, fungi nationallicence Botany & plant sciences nationallicence de Paula A. F. aut Figueiredo M. A. de O. aut Creed J. C. aut Botanica Marina Walter de Gruyter 46/5(2003-09-05), 413-424 0006-8055 46:5<413 2003 46 botm https://doi.org/10.1515/BOT.2003.041 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/BOT.2003.041 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- de Paula A. F. aut NATIONALLICENCE 700 1- Figueiredo M. A. de O. aut NATIONALLICENCE 700 1- Creed J. C. aut NATIONALLICENCE 773 0- Botanica Marina Walter de Gruyter 46/5(2003-09-05), 413-424 0006-8055 46:5<413 2003 46 botm CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter