Research method developments for assessment of subtidal commercial macrophytes

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Research method developments for assessment of subtidal commercial macrophytes

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Title: Research method developments for assessment of subtidal commercial macrophytes
Author: Semple, RE
Abstract: The marine alga Chondrus crispus is an important natural resource and has been the subject of numerous ecological studies. Commercially harvested beds are located on a shallow sandstone-type bottom, approximately 1-10 m deep and up to 1.0 km wide. Qualitative and quantitative techniques have been employed which utilize random sampling grids, point transects (both permanent and temporary) and photography to assess the biomass, substrate, and other related parameters. Techniques and equipment were improved and adopted to suit individual studies. Rapid methods of laying transects, transporting fully suited divers via surface tow to sampling sites quickly, using a portable underwater suction sample, and relocation of submerged objects are discussed.
Description: American Academy of Underwater Sciences (http://www.aaus.org/)
URI: http://archive.rubicon-foundation.org/9845
Date: 1985

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