Re-evaluating Primary Biotic Resource Use for Marine Biomass Production: A New Calculation Framework

Anh D. Luong, Thomas Schaubroeck, Jo Dewulf, Frederik De Laender

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

The environmental impacts of biomass harvesting can be quantified through the amount of net primary production required to produce one unit of harvested biomass (SPPR-specific primary production required). This paper presents a new calculation framework that explicitly takes into account full food web complexity and shows that the resulting SPPR for toothed whales in the Icelandic marine ecosystem is 2.8 times higher than the existing approach based on food web simplification. In addition, we show that our new framework can be coupled to food web modeling to examine how uncertainty on ecological data and processes can be accounted for while estimating SPPR. This approach reveals that an increase in the degree of heterotrophy by flagellates from 0% to 100% results in a two-fold increase in SPPR estimates in the Barents Sea. It also shows that the estimated SPPR is between 3.9 (herring) and 5.0 (capelin) times higher than that estimated when adopting food chain theory. SPPR resulting from our new approach is only valid for the given time period for which the food web is modeled and cannot be used to infer changes in SPPR when the food web is altered by changes in human exploitation or environmental changes.

langue originaleAnglais
Pages (de - à)11586-11593
Nombre de pages8
journalEnvironmental Science and Technology
Volume49
Numéro de publication19
Les DOIs
étatPublié - 8 sept. 2015

Empreinte digitale

resource use
food web
Biomass
biomass
heterotrophy
net primary production
flagellate
Aquatic ecosystems
whale
marine ecosystem
food chain
primary production
environmental change
environmental impact
Environmental impact
calculation
fold
modeling

Citer ceci

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abstract = "The environmental impacts of biomass harvesting can be quantified through the amount of net primary production required to produce one unit of harvested biomass (SPPR-specific primary production required). This paper presents a new calculation framework that explicitly takes into account full food web complexity and shows that the resulting SPPR for toothed whales in the Icelandic marine ecosystem is 2.8 times higher than the existing approach based on food web simplification. In addition, we show that our new framework can be coupled to food web modeling to examine how uncertainty on ecological data and processes can be accounted for while estimating SPPR. This approach reveals that an increase in the degree of heterotrophy by flagellates from 0{\%} to 100{\%} results in a two-fold increase in SPPR estimates in the Barents Sea. It also shows that the estimated SPPR is between 3.9 (herring) and 5.0 (capelin) times higher than that estimated when adopting food chain theory. SPPR resulting from our new approach is only valid for the given time period for which the food web is modeled and cannot be used to infer changes in SPPR when the food web is altered by changes in human exploitation or environmental changes.",
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Re-evaluating Primary Biotic Resource Use for Marine Biomass Production: A New Calculation Framework. / Luong, Anh D.; Schaubroeck, Thomas; Dewulf, Jo; De Laender, Frederik.

Dans: Environmental Science and Technology, Vol 49, Numéro 19, 08.09.2015, p. 11586-11593.

Résultats de recherche: Contribution à un journal/une revueArticle

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AU - Schaubroeck, Thomas

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