The potential for seaweed resource development in subarctic Canada; Nunavik,Ungava Bay |
| |
Authors: | G Sharp M Allard A Lewis R Semple G Rochefort |
| |
Institution: | (1) Fisheries and Oceans Canada, 1 Challenger Dr, Dartmouth, NS, Canada, B3Y 2A4;(2) Nunavik BioScience, 1111 Dr. Frederik-Philips Blvd, St. Laurent, QC, Canada, H4M 2X6 |
| |
Abstract: | Ungava Bay is ice covered 6–7 months of the year and evidence of ice scouring of seaweeds is extensive in the intertidal and
shallow subtidal. Maximum tidal amplitudes of 16 m, among the highest in Canadian waters, compound this impact. Despite this
level of annual perturbation, very extensive and dense beds of fucoids in the intertidal and laminarians in the subtidal are
common on the western shores of Ungava Bay. Ground surveys of 24 intertidal stations combined with satellite images delineated
82,000 tons standing crop of Fucus vesiculosus and Fucus evanescens in Payne Bay, of which 36,000 tons were considered harvestable. Subtidally, kelp cover reached peak biomass at 5–10 m consisting
of three primary species, Saccharina longicruris, Laminaria digitata, and Laminaria solidungula. In the area of Payne Bay, kelp beds of 100 ha were common, averaging 9–12 kg m−2 wet weight. The productivity of brown algae at these latitudes has been assumed to be low relative to southern latitudes.
Direct measurement of lineal growth indicates productivity is intermediate between arctic and temperate populations. The potential
for medium level industrial harvest exists under conservative management strategies within the constraints of subarctic logistics. |
| |
Keywords: | Kelp Laminaria Saccharina Fucus Abundance Harvest |
本文献已被 SpringerLink 等数据库收录! |
|