Applied and theoretical considerations for constructing spatially explicit individual-based models of marine larval fish that include multiple trophic levels
Individual-based modelling (IBM) techniques offer many advantages for spatially explicit modelling of marine fish early life history. However, computationally efficient methods are needed for incorporating spatially explicit circulation and prey dynamics into IBMs. Models of nutrient–phytoplankton–z...
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2001
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fthighwire:oai:open-archive.highwire.org:icesjms:58/5/1030 2023-05-15T18:32:52+02:00 Applied and theoretical considerations for constructing spatially explicit individual-based models of marine larval fish that include multiple trophic levels Hermann, Albert J. Hinckley, Sarah Megrey, Bernard A. Napp, Jeffrey M. 2001-01-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/58/5/1030 https://doi.org/10.1006/jmsc.2001.1087 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/58/5/1030 http://dx.doi.org/10.1006/jmsc.2001.1087 Copyright (C) 2001, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Regular Articles TEXT 2001 fthighwire https://doi.org/10.1006/jmsc.2001.1087 2013-05-27T04:12:43Z Individual-based modelling (IBM) techniques offer many advantages for spatially explicit modelling of marine fish early life history. However, computationally efficient methods are needed for incorporating spatially explicit circulation and prey dynamics into IBMs. Models of nutrient–phytoplankton–zooplankton (NPZ) dynamics have traditionally been formulated in an Eulerian (fixed spatial grid) framework, as opposed to the pseudo-Lagrangian (individual-following) framework of some IBMs. We describe our recent linkage of three models for the western Gulf of Alaska: (1) a three-dimensional, eddy-resolving, wind- and runoff-driven circulation model, (2) a probabilistic IBM of growth and mortality for egg and larval stages of walleye pollock ( Theragra chalcogramma ), and (3) an Eulerian, stage-structured NPZ model which specifies production of larval pollock prey items. Individual fish in the IBM are tracked through space using daily velocity fields generated from the hydrodynamic model, along with self-directed vertical migrations of pollock appropriate to each life stage. The NPZ dynamics are driven by the same velocity, temperature, and salinity fields as the pollock IBM, and provide spatially and temporally varying prey fields to that model. The resulting prey fields yield greater variance of individual fish attributes (e.g. length), relative to models with spatially uniform prey. Practical issues addressed include the proper time filtering and storage of circulation model output for subsequent use by biological models, and use of different spatial grids for physical and biological dynamics. We demonstrate the feasibility and computational costs of our coupled approach using specific examples from the western Gulf of Alaska. Text Theragra chalcogramma Alaska HighWire Press (Stanford University) Gulf of Alaska ICES Journal of Marine Science 58 5 1030 1041 |
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HighWire Press (Stanford University) |
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English |
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Regular Articles |
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Regular Articles Hermann, Albert J. Hinckley, Sarah Megrey, Bernard A. Napp, Jeffrey M. Applied and theoretical considerations for constructing spatially explicit individual-based models of marine larval fish that include multiple trophic levels |
topic_facet |
Regular Articles |
description |
Individual-based modelling (IBM) techniques offer many advantages for spatially explicit modelling of marine fish early life history. However, computationally efficient methods are needed for incorporating spatially explicit circulation and prey dynamics into IBMs. Models of nutrient–phytoplankton–zooplankton (NPZ) dynamics have traditionally been formulated in an Eulerian (fixed spatial grid) framework, as opposed to the pseudo-Lagrangian (individual-following) framework of some IBMs. We describe our recent linkage of three models for the western Gulf of Alaska: (1) a three-dimensional, eddy-resolving, wind- and runoff-driven circulation model, (2) a probabilistic IBM of growth and mortality for egg and larval stages of walleye pollock ( Theragra chalcogramma ), and (3) an Eulerian, stage-structured NPZ model which specifies production of larval pollock prey items. Individual fish in the IBM are tracked through space using daily velocity fields generated from the hydrodynamic model, along with self-directed vertical migrations of pollock appropriate to each life stage. The NPZ dynamics are driven by the same velocity, temperature, and salinity fields as the pollock IBM, and provide spatially and temporally varying prey fields to that model. The resulting prey fields yield greater variance of individual fish attributes (e.g. length), relative to models with spatially uniform prey. Practical issues addressed include the proper time filtering and storage of circulation model output for subsequent use by biological models, and use of different spatial grids for physical and biological dynamics. We demonstrate the feasibility and computational costs of our coupled approach using specific examples from the western Gulf of Alaska. |
format |
Text |
author |
Hermann, Albert J. Hinckley, Sarah Megrey, Bernard A. Napp, Jeffrey M. |
author_facet |
Hermann, Albert J. Hinckley, Sarah Megrey, Bernard A. Napp, Jeffrey M. |
author_sort |
Hermann, Albert J. |
title |
Applied and theoretical considerations for constructing spatially explicit individual-based models of marine larval fish that include multiple trophic levels |
title_short |
Applied and theoretical considerations for constructing spatially explicit individual-based models of marine larval fish that include multiple trophic levels |
title_full |
Applied and theoretical considerations for constructing spatially explicit individual-based models of marine larval fish that include multiple trophic levels |
title_fullStr |
Applied and theoretical considerations for constructing spatially explicit individual-based models of marine larval fish that include multiple trophic levels |
title_full_unstemmed |
Applied and theoretical considerations for constructing spatially explicit individual-based models of marine larval fish that include multiple trophic levels |
title_sort |
applied and theoretical considerations for constructing spatially explicit individual-based models of marine larval fish that include multiple trophic levels |
publisher |
Oxford University Press |
publishDate |
2001 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/58/5/1030 https://doi.org/10.1006/jmsc.2001.1087 |
geographic |
Gulf of Alaska |
geographic_facet |
Gulf of Alaska |
genre |
Theragra chalcogramma Alaska |
genre_facet |
Theragra chalcogramma Alaska |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/58/5/1030 http://dx.doi.org/10.1006/jmsc.2001.1087 |
op_rights |
Copyright (C) 2001, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1006/jmsc.2001.1087 |
container_title |
ICES Journal of Marine Science |
container_volume |
58 |
container_issue |
5 |
container_start_page |
1030 |
op_container_end_page |
1041 |
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1766217068823183360 |