Modelling the basin-scale demography of Calanus finmarchicus in the north-east Atlantic

In this paper, we report on a coupled physical–biological model describing the spatio‐temporal distribution of Calanus finmarchicus over an area of the North Atlantic and Norwegian Sea from 56°N, 30°W to 72°N, 20°E. The model, which explicitly represents all the life‐history stages, is implemented i...

Full description

Saved in:
Bibliographic Details
Published in:Fisheries oceanography 2005-09, Vol.14 (5), p.333-358
Main Authors: SPEIRS, DOUGLAS C., GURNEY, WILLIAM S.C., HEATH, MICHAEL R., WOOD, SIMON N.
Format: Article
Language:English
Subjects:
Calanus finmarchicus
diapause
overwintering
photoperiod
population dynamics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, we report on a coupled physical–biological model describing the spatio‐temporal distribution of Calanus finmarchicus over an area of the North Atlantic and Norwegian Sea from 56°N, 30°W to 72°N, 20°E. The model, which explicitly represents all the life‐history stages, is implemented in a highly efficient discrete space–time format which permits wide‐ranging dynamic exploration and parameter optimization. The underlying hydrodynamic driving functions come from the Hamburg Shelf‐Ocean Model (HAMSOM). The spatio‐temporal distribution of resources powering development and reproduction is inferred from SeaWiFS sea‐surface colour observations. We confront the model with distributional data inferred from continuous plankton recorder observations, overwintering distribution data from a variety of EU, UK national and Canadian programmes which were collated as part of the Trans‐Atlantic Study of Calanus (TASC) programme, and high‐frequency stage‐resolved point time‐series obtained as part of the TASC programme. We test two competing hypotheses concerning the control of awakening from diapause and conclude that only a mechanism with characteristics similar to photoperiodic control can explain the test data.
ISSN:1054-6006
1365-2419
DOI:10.1111/j.1365-2419.2005.00339.x