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- Title
Modeling and Reconstructing the Biotic Energy Flux in the White Sea Ecosystem Based on the Balance Principle.
- Authors
Boulion, V. V.; Berger, V. Ja.
- Abstract
The paper presents a mass-balance model that simulates the biotic energy flux in the White Sea ecosystem. The model is designed to forecast the annual production of autotrophic organisms, decomposers, and consumers of various orders, including fish and marine mammals. The results are tabulated and include the biotic balance of the sea, i.e., the biomass and production of key groups of hydrobionts and energy fluxes through prey–predator trophic chains. When forecasting bacterioplankton production, it is assumed that bacteria assimilate not only phytoplankton production, but also allochthonous DOM. The production of marine mammals (white whales) forecasted by the model, is close to that calculated from aerial counts of animals and the amount of food consumed by this group. According to the model, the production of the fish community is about 1.2 kcal m–2 yr–1. According to the fisheries data, the fish production is about five times less than the predicted value. This is apparently due to significant underestimation of the fish stock in the White Sea, on the basis of which the production of the entire fish community was calculated. According to the forecast, the annual fish catch in the White Sea could be 4 kg/ha (0.4 kcal m–2 yr–1), which is very close to that nearly 150 years ago (based on archive data). Currently, fishing in the White Sea has sharply decreased or is poorly accounted for.
- Subjects
FLUX (Energy); WHITE whale; FISH populations; MARINE mammals; FISH communities; PREY availability
- Publication
Oceanology (00014370), 2020, Vol 60, Issue 2, p205
- ISSN
0001-4370
- Publication type
Article
- DOI
10.1134/S0001437020020010