Environmental Variables And Intertidal Beach Annelids Of São Sebastião Channel (state Of São Paulo, Brazil)

Benthic annelid communities were studied during a one-year period (August/95 to July/96) in two sectors of the beaches Engenho d'Agua and São Francisco, São Sebastião Channel (São Paulo, Brazil), where the substrate is composed by a mixture of sand and rock fragments. Abiotic parameters such as salinity of interstitial water and sediment properties were used to characterize the environment. The polychaetes were well represented in the two sectors and their distribution was related with sediment type. The density of individuals and the number of taxa was higher at São Francisco, while the diversity and the evenness were higher at Engenho d'Agua. This difference can be a consequence of organic enrichment caused by domestic input, and of the lower and more variable salinity at São Francisco. Due to these factors, the high density of opportunistic species, like Capitella capitula ssp., Scolelepis squamata, Laeeonereis acuta and several oligochaetes, represented 75.5% of total abundance at this sector.493849857Allen, P.L., Moore, J.J., Invertebrate macrofauna as potential indicators of sandy beach instability (1987) Est. Coast. Shelf Sci., 24, pp. 109-125Amaral, A.C.Z., Ecologia e contribuição dos anelídeos poliquetos para a biomassa bêntica da zona das marés, no literal norte do Estado de São Paulo (1979) Bol. Inst. Oceanogr. S. Paulo, 28, pp. 1-52Amaral, A.C.Z., Morgado, E.H., Lopes, P.P., Belucio, L.F., Leite, F.P.P., Ferreira, C.P., Composition and distribution of the intertidal macrofauna of sandy beaches on São Paulo coast (1990) Simpósio de Ecossistemas da Costa Sul e Sudeste Brasileira: Estrutura, Função e Manejo, 2, pp. 258-279. , Publ. ACIESPAmaral, A.C.Z., Morgado, E.H., Pardo, E.V., Reis, M.O., Estrutura da comunidade de poliquetos da zona entremarés em praias da Ilha de São Sebastião (SP) (1995) Publ. Esp Inst. Oceanogr. S. Paulo, 11, pp. 229-237Amoureux, L., Étude bionomique et écologique de quelques annélides polyquetes des sables intertidaux de côtes ouest de la France (1966) Arch. Zool. Exp. Gen., 107, pp. 1-218Brown, A.C., Wynberg, R.P., Ecology of shores of mixed rock and sand in False Bay (1991) Trans Roy. Soc. S. Afr., 47, pp. 563-573Brown, A.C., McLachlan, A., (1990) Ecology of Sandy Shores, , Elsevier, Amsterdam. 327 pChareonpanich, C., Tsutsumi, H., Montani, S., Efficiency of the decomposition of organic matter loaded on the sediment, as a result of the biological activity of Capitella sp. I (1994) Mar. Poll. Bull., 28, pp. 314-318Choi, J.W., Koh, C.H., A study on the polychaete community in Kwangyang Bay, southern coast of Korea (1984) J. Oceanogr. Soc. Korea, 15, pp. 153-162Corbisier, T.N., Benthic macrofauna of sandy intertidal zone at Santos estuarine system, São Paulo, Brazil (1991) Bol. Inst. Oceanogr. S. Paulo, 39, pp. 1-13Dauer, D.M., Functional morphology and feeding behavior of Scolelepis squamata (Polychaeta: Spionidae) (1983) Mar. Biol., 77, pp. 279-285Denadai, M.R., Amaral, A.C.Z., A comparative study of intertidal molluscan communities in sandy beaches, São Sebastião Channel, São Paulo State, Brazil (1999) Bull. Mar. Sci., 65, pp. 91-103Dexter, D.M., The sandy beach fauna of Portugal (1988) Arq. Mus. Bocage., 1, pp. 101-110Elias, R., Ieno, E., La asociacion de Laeonereis acuta Treadwell, 1923 (Polychaeta: Nereidae) en la Bahia Blanca, Argentina (1993) Iheringia, 75, pp. 3-13. , Ser. Zool., Porto AlegreFeder, H.M., Jewett, S.C., Feeding interaction in the eastern Bering Sea with emphasis on the benthos (1981) The Eastern Bering Sea Shelf: Oceanography and Resources, 2 (1), pp. 1229-1261. , W. Hood. & J.A. Calder (eds.). University of Washington, SeattleFolk, R.L., Ward, W.C., Brazos River Bay, a study in significance of grain size parameters (1957) J. Sedim. Petrol., 27, pp. 3-26Fontes, R.F.C., As correntes no Canal de São Sebastião, SP (1996) Simpósio Sobre Oceanografia, 3, p. 369. , Publ FA-PESPGrassle, J.F., Grassle, J.P., Opportunistic life histories and genetic systems in marine benthic polychaetes (1974) J. Mar. Res., 32, pp. 253-284Gray, J.S., (1981) The Ecology of Marine Sediments, , Cambridge University, Cambridge. 185 pKrebs, C.J., (1986) Ecologia: Análisis Experimental de la Distribuición y Abundancia, , Pirámide, Madrid. 782 pLeite, F.P.P., Alterações na distribuição e densidade de Kalliapseudes schubarti Mané-Garzon, 1949 (Crustacea, Tanaidacea) do Araçá, São Sebastião (SP) (1989) Simpósio de Biologia Marinha, 8, p. 190. , Publ. CEBI-Mar/USPMcLachlan, A., Physical factors in benthic ecology: Effects of changing sand size on beach fauna (1996) Mar Ecol. Progr. Ser., 131, pp. 205-217Ménard, F., Gentil, F., Dauvin, J.C., Population dynamics and secondary production of Owenia fusiformis Delle Chiaje (Polychaeta) from the Bay of Seine (eastern English Channel) (1989) J. Exp. Mar. Biol. Ecol., 133, pp. 151-167Omena, E.P., Amaral, A.C.Z., Distribuição espacial de Polychaeta (Annelida) em diferentes ambientes entremarés de São Sebastião (SP) (1997) Oecologia, 3, pp. 183-196Pearson, T.H., Rosenberg, R., Macrobenthic succession in relation to organic enrichment and pollution of the marine environment (1978) Oceanogr. Mar. Biol. Ann. Rev., 16, pp. 229-311Pianka, E.R., On "r" and "k" selection (1970) Amer. Natur., 104, pp. 592-597Pocklington, P., Wells, P.G., Polychaetes: Key taxa for marine environmental quality monitoring (1992) Mar. Poll. Bull., 24, pp. 593-598Rizzo, A.E., Amaral, A.C.Z., Temporal variation of annelids in the intertidal zone of beaches of the São Sebastião Channel, southern Brazil (2000) J. Mar. Biol. Ass. U.K., 80, pp. 1007-1017Shimizu, R.M., Influência de um derramamento de öleo numa espécie dominante de fauna de praias arenosas no litoral paulista (1995) Simpósio de Recursos Hídricos, 11 & Simpósio de Hidráulica e Recursos Hidricos Dos Países de Língua Oficial Portuguesa, 2 (4), pp. 399-404. , Publ. ABRHSnelgrove, P.V.R., Butman, C.A., Animal-sediment relationships revisited: Cause versus effect (1994) Oceanogr. Mar. Biol. Ann. Rev., 32, pp. 111-177Souza, J.R.B., Gianuca, N.M., Zonation and seasonal variation of the intertidal macrofauna on a sandy beach of Paraná State, Brazil (1995) Sci. Mar., 59, pp. 103-111Suguio, K., (1973) Introdução à Sedimentologia, , Edgard Blucher/EDUSP, São Paulo. 312 pTsutsumi, H., Population persistence of Capitella sp. (PolychaetaCapitellidae) on a mud flat subject to environmental disturbance by organic enrichment (1990) Mar. Ecol Progr. Ser., 63, pp. 147-156Valentin, J.L., Agrupamento e ordenação (1995) Oecologia, 2, pp. 27-55Wright, L.D., Short, A.D., Morphodynamic variability of surf zones and beaches: A synthesis (1984) Mar. Geol., 48, pp. 259-28