Contents

Occasional Paper No. 3

An Inventory and Mapping of Subtidal Biophysical Features of the Goose Islands, Hakai Recreation Area, British Columbia - March 1995

Abstract


Prepared for BC Parks by
Brian Emmett, Lynton Burger and Yogi Carolsfeld
Archipelago Marine Research Ltd.
March 1995

The objective of the project was to assemble information on the subtidal features of the Goose Islands located within Hakai Recreation Area. A marine field survey was conducted using dive methods to describe representative subtidal communities to a depth of approximately 20 m. The method of classifying and mapping the biophysical features of the Goose Islands was adapted from methods to classify shoreline in British Columbia as well as terrestrial habitat mapping methods. Nearshore Physical Units, based on exposure, bottom substrate, slope and shoreline morphology, were used to define subtidal areas with similar physical features. In order to describe biological communities, Biophysical Units were defined as a combination of species most characteristic of a community and its physical environment. A total of 25 shore units were identified and mapped on an accompanying 1:20,000 map sheet. The total shore length of the Goose Islands and high water mark is approximately 70 km, while the length of individual shore units ranged from 523 to 6334 m. Seven unique Nearshore Physical Units were identified and mapped on an accompanying 1:20,000 map. Descriptions are presented for each of these units. Eight distinct Biophysical Units were described for the Goose Islands. The physical and biological features along a typical bottom profile within each Biophysical Unit are depicted. The field survey identified a total of 231 plant, invertebrate and fish species in the nearshore areas of Goose Islands. The survey methods used were proven to be reasonably effective at providing a qualitative description of the biophysical features of an area the size of the Goose Islands.

Occasional Paper #3, An Inventory and Mapping of Subtidal Biophysical Features of the Goose Islands, Hakai Recreation Area, British Columbia - March 1995 [PDF 2.72MB]