SS1.10 Marine Protected Areas: Critical tools for Marine Biodiversity Conservation
Date: Thursday, June 13, 2002
Location: Poster Session - VCC
 
CartySE, Department of Botany, University of British Columbia, Vancouver, Canada, scarty@interchange.ubc.ca
Tomascik, T, , Parks Canada Agency, Vancouver, Canada, tomas_tomascik@pch.gc.ca
DeWreede, R, E, Dept. of Botany, University of British Columbia, Vancouver, Canada, dewreede@interchange.ubc.ca
 
ZOSTERA MARINA AND NEOTRYPAEA CALIFORNIENSIS AS INDICATORS OF ECOSYSTEM INTEGRITY
image
Baseline studies aimed at assessing the ecological integrity of marine ecosystems are necessary for the implementation of ecosystem-based management. This research addresses issues related to cumulative human impacts in the Pacific Rim National Park Reserve. The focus of this study is population dynamics of Neotrypaea californiensis and Zostera marina communities in Grice Bay. Assessment of Neotrypaea population parameters includes density, size class distribution and reproductive status. The average Neotrypaea densities on mudflats range between 250-750 individuals per metre squared, and increase from July to November, being highest in the middle of the mudflats. Preliminary results also indicate a significant seasonal positive relationship between Neotrypaea burrow and individual density abundance. Ecological assessment of the seagrass community is also underway to determine seasonal trends, comparison between intertidal and subtidal beds and the primary production potential of the bay.