|Modelling the effects of marine aggregate extraction on benthic assemblages|
|Barry, J.; Boyd, S.; Fryer, R. (2010). Modelling the effects of marine aggregate extraction on benthic assemblages. J. Mar. Biol. Ass. U.K. 90(1): 105-114. dx.doi.org/10.1017/S0025315409990737|
|In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Plymouth. ISSN 0025-3154, more|
Abundance; Benthos; Species diversity; Marine
This paper develops models of the initial impact of marine aggregate extraction on a benthic assemblage. We predict the effect of dredging on species numbers and abundance assuming spatial randomness of individuals. We extend the model to allow for spatial clustering of individuals using a Matern process. Data from a controlled field experiment are used to develop a framework for estimating species reduction. This involves modelling the spatial pattern of individuals before dredging using a Matern process, the impact of dredging at an individual level, and the probability that a species is not seen in a post-dredging survey. The framework was used to estimate that, of the 41 species that were seen in a pre-dredging survey but not in a post-dredging survey, between 0 and 14 were eliminated (with 95% likelihood) rather than escaped detection. The most likely number eliminated was 4.