Shoreline vegetation on herring spawning grounds in Barkley Sound in 1978 compared with similar assessments for 1974 and 1975 / by C.W. Haegele and M.J. Hamey. : Fs97-4/1549E-PDF

"The vegetation on major herring spawning grounds is being mapped in British Columbia from large format colour and colour-infrared photographs. Photographs were obtained for 48 km of coastline in Barkley Sound in 1978, repeating 14 km photographed in 1974. A diver survey of 4.8 km at two locations photographed was conducted in 1975. There were 734.2 ha of vegetation mapped from the 1978 photography of which red algae accounted for the major portion followed by sea grasses, brown algae and rockweed. There were no major shifts in vegetation noted between the 1974 and 1978 photographs or between the 1975 diver survey and 1978 photographs. However, vegetation both deeper than -5 m and of less than 25 percent cover cannot be identified on aerial photographs taken on a +1.5 m tide"--Abstract, page iii.

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