EXXON VALDEZ Oil Spill Restoration Project Final Report. Trophic Mass-Balance211 Model of Alaska's Prince William Sound Ecosytem, for the Post-Spill Period 1994-211 1996. Second Edition. Fisheries Centre Research Reports, Vol. 7, Number 4, 1999

摘要

The food web of Prince William Sound (PWS) was characterized with a mass-balanced211u001emodel of trophic flow (Ecopath), constructed by a broad collaboration of experts 211u001eusing data from 1994-1996. This was the post-spill period with the best available 211u001edata. This model of the PWS food web was then analyzed using the dynamic 211u001esimulation routines Ecosim and Ecospace, now included in the Ecopath modeling 211u001esoftware. The PWS model is a cohesive synthesis of the PWS biotic community, with 211u001eof focus on its structure, and how it might respond to natural and anthropogenic 211u001eperturbations. This volume includes written contributions from over thirty-five 211u001eexperts on the 48 biotic components of the PWS ecosystem defined by the 211u001ecollaborative group. Biotic components range from particular life stages of a 211u001especies to species aggregations. In this way, all species in the ecosystem are 211u001eincluded explicitly or implicitly. Groups are described in terms of biomass, 211u001eproduction and consumption rates, diet compositions, migration rates, and fishery 211u001ecatches. These estimates were the main input parameters.