Effects of wave exposure on the abundance and composition of amphipod and tanaidacean assemblages inhabiting intertidal coralline algae

Autor(es)

Bueno, M. ^{[1, 2]} ; Dena-Silva, S. A. ^[1] ; Flores, A. A. V. ^[2] ; Leite, F. P. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Dept Biol Anim, Programa Posgrad Ecol, Inst Biol, UNICAMP, CP 6109, BR-13083970 Campinas, SP - Brazil

^[2] Univ Sao Paulo, Ctr Biol Marinha, Rodovia Manoel Hipolito Rego, Km 131, 5, BR-11600000 Sao Sebastiao, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Marine Biological Association of the United Kingdom; v. 96, n. 3, p. 761-767, MAY 2016.
• Citações Web of Science: 8

Resumo

Peracarid crustaceans are an important component of the vagile fauna associated with coralline algal beds, which often characterize the infralittoral fringe of tropical rocky shores. Among other variables affecting faunal assemblages, sedimentation, food supply and oxygen concentration within mats or turfs of coralline algae may greatly depend on the exposure to waves. In this study, peracarid assemblages were compared at replicated rocky shores within different levels of wave exposure, along a coastline in south-eastern Brazil. Overall amphipod diversity (11 species) was much higher than tanaidacean diversity (two species). Correlation analyses did not support any biological interactions between amphipods and tanaidaceans. Habitat complexity, while apparently limiting amphipod populations, did not affect tanaidaceans at a local scale. Amphipod abundance, not assemblage structure, was positively affected by wave exposure, probably improving oxygen concentration levels and renewal of food resources. Rather than abundance, which remains fairly stable, exposure to waves determined species identity in tanaidaceans, with Zeuxo coralensis found at exposed shores and Leptochelia aff. dubia found at sheltered shores, except for two L. aff. dubia individuals found at one of the exposed sites. Differences in the supply of sediment and the ability of these species in manipulating grains for tube building may explain such a striking pattern. (AU)

• Processo FAPESP: 09/53937-4 - Caracterizacao de microhabits formados por algas calcareas e sua utilizacao pelos anfipodes em costoes rochosos do litoral norte de sao paulo.
• Beneficiário: Marília Bueno Fernandes
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 11/11927-2 - Efeito do hidrodinamismo e variação temporal nas espécies de tanaidacea (crustacea) associadas às algas calcárias em costões rochosos do litoral norte de são paulo
• Beneficiário: Simone Aparecida Dena Silva
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica