Conference Proceedings Or Journal

 

Nutrient Enrichment and Marine Ecosystem Disturbance: A Deterministic and Stochastic Approach Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/conference_proceedings_or_journals/qj72p8237

Descriptions

Attribute NameValues
Creator
Abstract
  • Pollution of the marine areas that support much of the world's commercial fisheries is regarded as a pressing global environmental problem. One often-cited issue is nutrient enrichment, but this may be a mixed blessing: it contributes to primary productivity and increases the sustainable fish catch, while simultaneously causing occasional and damaging ecosystem events. Thus, enrichment's aggregate impact on the economic value of fisheries may be ambiguous. This research develops a method for analyzing such problems, using the example of the Black Sea anchovy fishery. Employing a bioeconomic model that incorporates nutrients directly into fish population dynamics, the problem is formulated in deterministic and stochastic terms and the results compared. The deterministic model assumes that nutrients only contribute positively to fish production for a given ecological state, and ignores stochastic events leading to shifts between states. Accordingly, marginal abatement of nutrients leads to annual welfare losses of US$ 45,000 to 713,00 per μ (1989/90 prices), depending upon the ecosystem state. The stochastic formulation recognizes that planners may have some knowledge of potentially damaging shifts in ecological states, and wish to take this into account. When these shifts are related stochastically to the level of enrichment, nutrient abatement is shown to have an indeterminate welfare effect. However, an experimental empirical analysis indicates that a marginal change in nutrients can generate positive and sizeable aggregate benefits for the Black Sea anchovy fishery under certain conditions. The general applicability of such an approach for analyzing a range of marine environmental problems is noted
Resource Type
Date Available
Date Copyright
Date Created
Date Issued
Citation
  • Knolwer, Duncan. Nutrient Enrichment and Marine Ecosystem Disturbance: A Deterministic and Stochastic Approach. In: Microbehavior and Macroresults:Proceedings of the Tenth Biennial Conference of the International Institute ofFisheries Economics and Trade, July 10-14, 2000, Corvallis, Oregon, USA.Compiled by Richard S. Johnston and Ann L. Shriver. InternationalInstitute of Fisheries Economics and Trade (IIFET), Corvallis, 2001.
Proceedings Editors
  • Shriver, Ann L.
  • Johnston, Richard S.
Keyword
Rights Statement
Funding Statement (additional comments about funding)
  • International Institute of Fisheries Economics and Trade U.S. National Marine Fisheries Service MG Kailis Group
Publisher
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Janet Webster(janet.webster@oregonstate.edu) on 2012-07-05T16:24:18Z (GMT) No. of bitstreams: 1 025.pdf: 161801 bytes, checksum: bd34ff23b8769537f5767cedc0eaf111 (MD5)
  • description.provenance : Submitted by Janet Webster (janet.webster@oregonstate.edu) on 2012-07-02T21:48:53Z No. of bitstreams: 1 025.pdf: 161801 bytes, checksum: bd34ff23b8769537f5767cedc0eaf111 (MD5)
  • description.provenance : Made available in DSpace on 2012-07-05T16:24:18Z (GMT). No. of bitstreams: 1 025.pdf: 161801 bytes, checksum: bd34ff23b8769537f5767cedc0eaf111 (MD5) Previous issue date: 2001

Relationships

Parents:

This work has no parents.

Items