INVESTIGADORES
PERILLO Gerardo Miguel E.
artículos
Título:
An ecological cascade effect: migratory birds affect stability of intertidal sediments
Autor/es:
DABORN, GR; AMOS, CL; BRYLINSKY, M; CHRISTIAN, H; DRAPEAU, G; GRANT, G; LONG, B; PATERSON, D; PERILLO, GERARDO M. E.; PICCOLO, M CINTIA
Revista:
Limnology and Oceanography
Editorial:
American Association of Limnology and Oceanography
Referencias:
Lugar: Washington, DC; Año: 1993 vol. 38 p. 225 - 231
Resumen:
erodibility of fine-grained intertidal sedimentsfound that sediment strength increased withthe arrival of large numbers of migratory shorebirds.Before the birds came, sediment cohesion resultedin part from secretion of polysaccharides by benthicdiatoms whose production was controlled mainly bya grazing amphipod, Corophium volutator. When thebirds arrived, Corophium behavior and abundancechanged, bioturbation and grazing pressure on thediatoms decreased, and production of cohesion-inducingcarbohydrates rose. The results emphasizethe importance of biological processes in affectingsediment stability and the limitations of laboratorybasedmeasurements of sediment properties used inmodels of cohesive sediment behavior.
