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|  | | | | Title | The economics of a 'Mixed Blessing' effect: A case study of the Black Sea
( Document )
| | Author(s) / Editor(s) | Knowler, D.; Barbier, E.B. | | Description | Nutrient enrichment of marine ecosystems is regarded as a pressing global environmental problem. For certain marine species it may be a mixed blessing, resulting in damaging ecosystem events, but contributing to primary productivity. Consequently, the impact of enrichment on fishery profits may be positive or negative. This paper 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. The deterministic model assumes a given ecological state in which nutrients contribute positively to pelagic fish production. The stochastic model recognizes that the planner may take into account the probability of potentially damaging shifts in ecological states due to nutrient enrichment. In this latter model, nutrient abatement has an indeterminate welfare effect, but under certain conditions a marginal change in nutrients generates positive aggregate benefits. | | Keywords | NUTRIENT ENRICHMENT; POPULATION DYNAMICS; EUTROPHICATION; CASE STUDIES | | Geography Keywords | BLACK SEA | | Content Language(s) | English | | File Location | | | Publisher | Fondazione Eni Enrico Mattei (FEEM) | | Publication Location | MIlan (Italy) | | Publication Date | January 2002 | |
| Source | FEEM Working Paper | | Reference Info | | Volume/Issue Number | No. 3.2002 | | | Number of Pages | 46 p. |
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Editor(s) | | · | Chief Editor | |
Topic Info | | · | ID: 243147 | | · | Visits: 4441 | | · | Added: 14 March 2005 | | · | Updated: 11 April 2005 | | · | URL: http://www.onefish.org/id/243147 | |
KO Owner | | · | Chief Editor | |
KO Info | | · | ID: 247240 | | · | Visits:
10 | | · | Added:
20 April 2005 | | · | Updated:
02 May 2005 | | · | URL:
http://www.onefish.org/id/247240 | | |
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