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Abstract:

Five exposed microtidal sandy beaches of North-eastern Buenos Aires (Argentina) were analysed to evaluate the influence of coastal dynamics on the abundance of the intertidal clams Donax hanleyanus and Mesodesma mactroides over a 1-year period. The physical characterisation of each beach was performed using 15 environmental variables and six morphodynamic indices. The population densities of both clam species were estimated by the number of individuals per strip-transect. Analysis of similarities revealed a significant multivariate environmental difference among beaches, which could be aggregated into a northern and a southern group. The former group was characterised by an intermediate morphodynamic state and by having, in general, high density values for both clam species. The latter was composed of beaches with an intermediate reflective state and showed, in general, low density values. Beach Index and Area showed the lowest temporal variation. Total density values, as well as density values of recruits and adults of D. hanleyanus and M. mactroides did not follow a north-south latitudinal gradient. Spatial and temporal fluctuations of density values were best explained by changes in individual physical variables rather than by changes in composite indices. © 2009 Blackwell Verlag GmbH.

Registro:

Documento: Artículo
Título:Influence of beach morphodynamics on the bivalve Donax hanleyanus and Mesodesma mactroides populations in Argentina
Autor:Thompson, G.A.; Sánchez De Bock, M.F.
Filiación:Departamento de Ecología, Genética y Evolución, Facultad de Cienias Exactas y Naturales, Universidad de Buenos Aires, 1428 Capital Federal, Buenos Aires, Argentina
Fundación Aquamarina, Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas, Buenos Aires, Argentina
Palabras clave:Bivalves; Donax hanleyanus; Mesodesma mactroides; Morphodynamic index; Physical variables; Sandy beach; Wedge clam; Yellow clam; abundance; beach morphology; bivalve; morphodynamics; multivariate analysis; population density; population dynamics; temporal variation; Argentina; South America; Bivalvia; Donax hanleyanus; Mesodesma mactroides
Año:2009
Volumen:30
Número:2
Página de inicio:198
Página de fin:211
DOI: http://dx.doi.org/10.1111/j.1439-0485.2008.00271.x
Título revista:Marine Ecology
Título revista abreviado:Mar. Ecol.
ISSN:01739565
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01739565_v30_n2_p198_Thompson

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Citas:

---------- APA ----------
Thompson, G.A. & Sánchez De Bock, M.F. (2009) . Influence of beach morphodynamics on the bivalve Donax hanleyanus and Mesodesma mactroides populations in Argentina. Marine Ecology, 30(2), 198-211.
http://dx.doi.org/10.1111/j.1439-0485.2008.00271.x
---------- CHICAGO ----------
Thompson, G.A., Sánchez De Bock, M.F. "Influence of beach morphodynamics on the bivalve Donax hanleyanus and Mesodesma mactroides populations in Argentina" . Marine Ecology 30, no. 2 (2009) : 198-211.
http://dx.doi.org/10.1111/j.1439-0485.2008.00271.x
---------- MLA ----------
Thompson, G.A., Sánchez De Bock, M.F. "Influence of beach morphodynamics on the bivalve Donax hanleyanus and Mesodesma mactroides populations in Argentina" . Marine Ecology, vol. 30, no. 2, 2009, pp. 198-211.
http://dx.doi.org/10.1111/j.1439-0485.2008.00271.x
---------- VANCOUVER ----------
Thompson, G.A., Sánchez De Bock, M.F. Influence of beach morphodynamics on the bivalve Donax hanleyanus and Mesodesma mactroides populations in Argentina. Mar. Ecol. 2009;30(2):198-211.
http://dx.doi.org/10.1111/j.1439-0485.2008.00271.x