| Sediment and benthos of two sites in Cowichan Bay were
sampled and compared in order to conduct an initial assessment of potential effects of log
handling. A Ponar grab was used to collect samples which were then sieved, qualitatively
analyzed, and sorted. Organisms were separated into general categories, assigned a species
name when possible, and counted. Results were then compared to each other and to data
obtained earlier in the summer by groups of students involved in a marine science camp. The sites showed variation in sediment type, diversity, and
richness. The site closest to the log handling was found to contain much wood
debris and a high mud content as well as showing a less diverse biological community,
dominated by segmented worms. The site farther away from log handling was found to have
less wood debris, more sand and shell debris, and had a greater percentage of suspension
feeders, namely bivalves such as Axinopsida serricata and Parvalucina
tenuisculpta. Recommendations include further sampling, more detailed sampling, and
consistent monitoring of the benthic community to ascertain whether or not log handling is
having a negative effect on this community and in turn the other organisms which depend on
it. |
