Effects of experimental oil exposure on the fauna associated withCorallina officinalisL. in intertidal rock pools

Abstract

Field and laboratory experiments on the effects of small-scale pollution by unweathered Ekofisk crude oil on the fauna of intertidal rock pools were carried out in western Norway. Ecological results indicate an immediate effect at community level, followed by rapid recovery. A similar pattern is also valid for biological accumulation and degradation of oil components by Patella vulgata L. Behavioural tests demonstrate differences in responses to oil among species. Amphipods (Hyale nilssoni Rathke, H. pontica Rathke, Stenothoe monoculoides Bate, and Amphithoe rubricata Montagu) are generally more sensitive than isopods, tanaidaceans, and decapods. The importance of the microdistribution of species within habitat (Corallina officinalis) is discussed in relation to adaptive strategies.