Hydrobiologia

, Volume 204, Issue 1, pp 17–24 | Cite as

Ecological impact of marine plant harvesting in the northwest Atlantic: a review

  • G. J. Sharp
  • J. D. Pringle
Population and community effects of seaweed harvesting

Abstract

The ecological impact of marine plant harvesting is related to the intensity of exploitation, the harvesting technique, and the vulnerability of the species or habitat to perturbation. In eastern Canada information was available on four levels of impact: long-term changes in the target species and direct loss or damage to non-target species, direct or indirect impact on the habitat or community, indirect effects of changes in habitat or community structure, and trophic level impact. Near monoculture stands of Chondrus crispus have associated with them up to 36 animals species and 19 major species of algae that are vulnerable to removal as by-catch. Indirect effects of changes in macrophyte cover were not observed in fish species utilization of Ascophyllum nodosum beds on rising tides. Subtidal areas devoid of all macrophyte cover had lower levels of the preferred foods for Homarus americanus than kelp-covered areas; however, barren grounds are not created by macrophyte exploitation rates of 20% to 80% in eastern Canada. Long-term harvesting has altered the population structure and population ecology of C. crispus and A. nodosum in some areas. In general both target species and associated communities are resistant to perturbation.

Key words

Ascophyllum Chondrus dragrakes ecological impact harvesting Laminaria seaweed 

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References

  1. Black, R. & R. J. Miller, 1986. Ascophyllum harvesting and use of intertidal by finfish. C. A. F. S. A. C. Research Document 86/84, 10 pp.Google Scholar
  2. Boaden, P. J. S. & M. T. Dring, 1980. A quantitative evaluation of the effects of Ascophyllum harvesting on the littoral ecosystem. Helgolander wiss. Meeresunters. 33: 700–710.Google Scholar
  3. Chapman, A. R. O., 1987. The wild harvest and culture of Laminaria longicruris de la Pylaie in Eastern Canada. F. A. O. Fish. Tech. Paper 281: 193–237.Google Scholar
  4. Chock, J. S. & A. C. Mathieson, 1983. Variations of New England estuarine seaweed biomass. Bot. Mar. 26: 87–97.Google Scholar
  5. Chopin, T., J. D. Pringle & R. E. Semple, 1988. Reproductive capacity of dragraked and non-dragraked Irish moss (Chondrus crispus Stackhouse) beds in the southern Gulf of St. Lawrence. Can. J. Fish. aquat. Sci. 45: 758–766.Google Scholar
  6. Ennis, G. P., 1986. Stock definition, recruitment variability and larval recruitment processes in the American lobster, Homarus americanus: a review. Can. J. Fish. aquat. Sci. 43: 2072–2084.Google Scholar
  7. Foster, M. S. & D. C. Barilotti, 1990. An approach to determining the ecological effects of seaweed harvesting: a summary. Hydrobiologia 204/205 (Proc. int. Seaweed Symp. 13): 15–16.Google Scholar
  8. Gendron, L., 1989. Seasonal growth of the kelp Laminaria longicruris in the Baie des Chaleurs, Quebec, in relation to nutrient and light availability. Bot. mar. 32: 345–354.Google Scholar
  9. Mann, K. H. 1982. Ecology of coastal waters: a systems approach. Studies in Ecology, Volume 8, Blackwell Scientific Publications, Oxford, Great Britain, 322 pp.Google Scholar
  10. Mathieson, A. C., J. W. Shipman, J. R. O'Shea & R. C. Hasevalt, 1976. Seasonal growth and reproduction of estuarine fucoid algae in New England, J. exp. mar. Biol. Ecol. 25: 273–284.Google Scholar
  11. McLachlan, J., 1982. The seaweed industry: an appraisal of resource management and cultivation, especially as related to the extractive industry. Mongrafias biologicas 2: 151–168.Google Scholar
  12. Michaud, B. J., 1986. Composition and production of macrobenthic invertebrate communities and food resources of the American lobster Homarus americanus along the Atlantic coast of Nova Scotia. Ph. D. thesis. Dalhousie University, Halifax, Nova Scotia, 322 pp.Google Scholar
  13. Miller, R. J., 1985. Succession in sea urchin and seaweed abundance in Nova Scotia, Canada. Mar. Biol. 84: 275–286.Google Scholar
  14. Miller R. J., K. H. Mann & D. J. Scarra, 1971. The production potential of a seaweed-lobster community in eastern Canada. J. Fish. Res. Bd. Can. 28: 1733–1738.Google Scholar
  15. Paine, R. T., 1984. Ecological determinism in the competition for space. Ecology 65: 1339–1348.Google Scholar
  16. Pringle, J. D. & A. C. Mathieson, 1987. Chondrus crispus Stackhouse. F. A. O. Fish. Tech. Paper 281: 50–118.Google Scholar
  17. Pringle, J. D. & R. E. Semple, 1983. A description of the major commercial Irish moss (Chondrus crispus Stackh.) beds in the southern Gulf of St. Lawrence. Proc. Int. Seaweed Symp. 11: 342–345.Google Scholar
  18. Pringle, J. D. & R. E. Semple, 1988. Impact of harvesting on Irish moss (Chondrus crispus) frond size-class structure. Can. J. Fish. aquat. Sci. 45: 767–773.Google Scholar
  19. Pringle, J. D. & G. J. Sharp, 1980. Multispecies resource management of economically important marine plant communities of eastern Canada. Helgolander wiss. Meeresunters. 33: 711–720.Google Scholar
  20. Pringle, J. D. & G. J. Sharp, 1986. Rationale for the path chosen in bringing assessment science to the eastern Canadian Irish moss (Chondrus crispus) fishery. In R. Westermeier (ed.), Actas II Congr. Algas Mar. Chilenas Universidad Austral de Chile: 75–90.Google Scholar
  21. Rigler, F. H., 1982. Recognition of the possible: an advantage of empiricism in ecology. Can. J. Fish. aquat. Sci. 39: 132–137.Google Scholar
  22. Sharp, G. J., 1987. Ascophyllum nodosum and its harvesting in eastern Canada. F. A. O. Fish. tech. Paper 281: 3–46.Google Scholar
  23. Sharp, G. J. & J. A. Carter, 1986. Biomass and population structure of kelp (Laminaria spp.) in southwestern Nova Scotia. Can. Man. Rep. Fish. aquat. Sci. 1907: 19 pp.Google Scholar
  24. Sharp, G. J. & D. Tremblay, 1989. An assessment of Ascophyllum nodosum resources in Scotia-Fundy. C.A.F.S.A.C. Res. Doc. 89/1: 19 pp.Google Scholar
  25. Smith, B. D., 1985. Recovery following experimental harvesting of Laminaria longicruris and L. digitata in southwestern Nova Scotia. Helgolander wiss. Meeresunters. 39: 83–101.Google Scholar
  26. Smith, B. D., 1986. Implications of population dynamics and interspecific competition of the harvest management of the seaweed Laminaria. Mar. Ecol. Prog. Ser. 33: 7–18.Google Scholar
  27. Strömgren, T., 1983. Temperature-length growth strategies in the littoral alga Ascophyllum nodosum (L.) Limnol. Oceanogr. 28: 516–521.Google Scholar
  28. Vadas, R. L. & W. A. Wright, 1986. Recruitment, growth and management of Ascophyllum nodosum. In R. Westermeier (ed.), Actas II Congr. Algas Mar. Chilenas. Universidad Austral de Chile: 101–113.Google Scholar

Copyright information

© Kluwer Academic Publishers 1990

Authors and Affiliations

  • G. J. Sharp
    • 1
  • J. D. Pringle
    • 1
  1. 1.Department of Fisheries and Oceans, Biological Sciences BranchHalifax Fisheries Research LaboratoryHalifaxCanada

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