Factors influencing temporal variation of a Sargassum filipendula (Phaeophyta: Fucales) bed in a subtropical shore

Autor(es)

Jacobucci, G. B. ^{[1, 2]} ; Tanaka, M. O. ^[3] ; Leite, F. P. P. ^[4]

Afiliação do(s) autor(es)

^[1] Univ Fed Uberlandia, Inst Biol, BR-38402902 Uberlandia, MG - Brazil

^[2] Inst Costa Brasilis Desenvolvimento Socio Ambieta, BR-11680970 Ubatuba, SP - Brazil

^[3] Univ Fed Sao Carlos, Dept Hidrobiol, BR-13565905 Sao Carlos - Brazil

^[4] Univ Estadual Campinas, Inst Biol, Dept Zool, BR-13083970 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Marine Biological Association of the United Kingdom; v. 89, n. 2, p. 315-321, MAR 2009.
• Citações Web of Science: 8

Resumo

In the present study, we evaluate the influence of biotic and abiotic factors on temporal fluctuations of Sargassum filipendula in a subtropical shore. Monthly algal samples, abiotic components, amphipod grazer density, and epiphyte biomass were obtained from a Sargassum bed in south-eastern Brazil. Density of S. filipendula fronds decreased during the sampling period, whereas dry mass was more constant, although with a noticeable reduction in the warmer months. Hypnea musciformis was the most frequent epiphyte on S. filipendula, occurring in all sampling periods, although with significant temporal variation. Sargassum filipendula density and dry mass were both influenced by epiphyte dry mass, temperature, and amphipod grazers. Sargassum filipendula biomass negatively influenced total epiphyte biomass, whereas H. musciformis biomass was positively influenced by phosphate, nitrite, and S. filipendula density and negatively influenced by S. filipendula dry mass and amphipod grazer abundance. Algal temporal fluctuations can be related to local abiotic and biotic factors, but the variation observed for S. filipendula and its epiphytes suggest that these factors have quite distinct effects for these algae. (AU)

• Processo FAPESP: 99/11325-9 - Interações macrófita-epífitas-anfípodes herbívoros em um banco de Sargassum, do litoral Norte do estado de São Paulo
• Beneficiário: Giuliano Buzá Jacobucci
• Modalidade de apoio: Bolsas no Brasil - Doutorado