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Título : The role of selective predation in harmful algal blooms
Autor : Solé, Jordi, García-Ladona, Emilio, Estrada, Marta
Palabras clave : Harmful algal blooms
feeding avoidance
Fecha de publicación : Aug-2006
Editor: Elsevier
Citación : Journal of Marine Systems 62(1-2): 46-54 (2006)
Resumen: A feature of marine plankton communities is the occurrence of rapid population explosions. When the blooming species are directly or indirectly noxious for humans, these proliferations are denoted as harmful algal blooms (HAB). The importance of biological interactions for the appearance of HABs, in particular when the proliferating microalgae produce toxins that affect other organisms in the food web, remains still poorly understood. Here we analyse the role of toxins produced by a microalgal species and affecting its predators, in determining the success of that species as a bloom former. A three-species predator–prey model is used to define a criterion that determines whether a toxic microalga will be able to initiate a bloom in competition against a non-toxic one with higher growth rate. Dominance of the toxic species depends on a critical parameter that defines the degree of feeding selectivity by grazers. The criterion is applied to a particular simplified model and to numerical simulations of a full marine ecosystem model. The results suggest that the release of toxic compounds affecting predators may be a plausible biological factor in allowing the development of HABs
Descripción : 9 pages, 5 figures
Versión del editor:
ISSN: 0924-7963
DOI: 10.1016/j.jmarsys.2006.04.002
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