Advertisement

Marine Biology

, Volume 86, Issue 1, pp 93–100 | Cite as

Distribution of the soft-bottom macroinfauna in an estuary of Southern Chile

  • W. Richter
Article

Abstract

In April 1981, a quantitative survey (20 stations) of the soft-bottom macroinfauna of the littoral and sublittoral was conducted in a Southern Chilean estuary. A principal component analysis rendered three groups of stations with different substrate conditions. A total of 16 775 animals was collected (40 taxa), with Oligochaeta, Polychaeta and Ostracoda representing 83% of the individuals. Most of the biomass was attributed to Bivalvia (43.7%) and Polychaeta (33.6%). Factor analysis using abundance data of the 21 most abundant taxa rendered three groups of stations in the Q-mode (a cluster analysis rendered 4) and three groups of taxa in the R-mode. One group mainly inhabited the sandy outlet area of the estuary where salinity was highest. Another group of organisms was mainly found in the upper zone of the estuary where salinity was low and the substrate was muddy. The third group was principally distributed in the central part of the estuary and spread from there either to the outlet area or to the upper zone. Some ungrouped taxa were distributed relatively homogeneously within the estuary. It was found that besides substrate properties salinity and turbulence also played an important role in the distribution of organisms in the Río Lingue Estuary.

Keywords

Biomass Principal Component Analysis Cluster Analysis Bivalvia Polychaeta 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literature cited

  1. Arenas, J.: Distribución de Elminius kingii (Gray) (Cirr.) en el estuario del Río Valdivia. Beitr. neotrop. Fauna 6, 199–206 (1971)Google Scholar
  2. Bertrán, C.: Sistemática y distribución de Perinereis gualpensis Jeldes (Polychaeta, Nereidae) en el estuario del Río Lingue, Mehuín. Lic. Thesis, Facultad de Ciencias, Univ. Austral de Chile, Valdivia, 73 pp. 1976Google Scholar
  3. Bertrán, C.: Macroinfauna intermareal en el estuario del Río Lingue (Chile). Stud. neotrop. Fauna Envir. (In press)Google Scholar
  4. Campos, H., E. Bucarey and J. Arenas: Estudios limnológicos del Lago Ri nihue y Río Valdivia (Chile). Bol. Soc. Biol. Concepción (Chile) XLVIII 47–67 (1974)Google Scholar
  5. Folk, R.: Petrology of sedimentary rocks, 182 pp. Austin, Texas: Hemphill Publ. Co. 1974Google Scholar
  6. Gray, J.: Animal-sediment relationship. Oceanogr. mar. Biol. A. Rev. 12, 223–261 (1974)Google Scholar
  7. Jaramillo, E., S. Mulsow, M. Pino and H. Figueroa: Subtidal benthic macroinfauna in an estuary of South Chile: distribution pattern in relation to sediment types. P.S.Z.N.I.: Mar. Ecol. 5, 119–133 (1984)Google Scholar
  8. Larsen, P.: The shallow-water macrobenthos of a northern New England estuary. Mar. Biol. 55, 69–78 (1979)Google Scholar
  9. Loi, T. and B. Wilson: Macroinfaunal structure and effects of thermal discharges in a mesohaline habitat of Chesapeake Bay, near a nuclear power plant. Mar. Biol. 55, 3–16 (1979)Google Scholar
  10. López-Jamar, E.: Spatial distribution of the infaunal benthic communities of the Ría de Muros, Northwest Spain. Mar. Biol. 63, 29–37 (1981)Google Scholar
  11. Maurer, D. L., L. Watling, P. Kinner, W. Leathem and C. Werthe: Benthic invertebrate assemblages of Delaware Bay. Mar. Biol. 45, 65–78 (1978)Google Scholar
  12. Nie, N., C. Hall, J. Jenkins, K. Steinbrenner and D. Bent: Statistical package for the social sciences, 675 pp. New York: McGraw-Hill 1975Google Scholar
  13. Remane, A.: Die Brackwasserfauna. Verh. Dt. Zool. Ges. 36, 34–74 (1934)Google Scholar
  14. Saiz, F.: Experiencias en el uso de criterios de similitud en el estudio de comunidades. Arch. Biol. Med. Exp. 13, 387–402 (1980)Google Scholar
  15. Sokal, R. and P. Sneath: Numerical taxonomy, 549 pp. San Francisco: W. H. Freeman 1963Google Scholar
  16. Stotz, W.: Mytilus chilensis y Elminius kingii: Biología e interacciones en el submareal rocoso del estuario del Río Lingue (Mehuín, Provincia de Valdivia). Lic. Thesis, Facultad de Ciencias, Universidad Austral de Chile, Valdivia, 86 pp. 1979Google Scholar

Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • W. Richter
    • 1
  1. 1.Institut für MeeresforschungBremerhaven 1Federal Republic of Germany

Personalised recommendations