Intermingling of two <I>Pseudocalanus</I> species on Georges Bank

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ID: 304903
2002
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Abstract
Physical and biological controls on the springtime distributions of Pseudocalanus moultoni and P. newmani on Georges Bank are examined by assimilating observations into a coupled physicalbiological model. Monthly snapshots of abundance are derived from U.S. GLOBEC Georges Bank broad-scale surveys during 1997. The forward problem is posed as an advection-diffusion-reaction equation for the copepod concentration. The adjoint method of data assimilation is used to invert for the biological sources and sinks implied by the observed changes in abundance between surveys and the e ow during the intervening period. Based on this analysis, the two species appear to have distinct population centers in the late winter/early spring: P. moultonion the northwest e ank of the Bank and P. newmani on the Northeast Peak and the southern tip of Browns Bank. As the growing season progresses, the clockwise circulation around Georges Bank blends reproducing (but not interbreeding) animals from the two source regions, causing their distributions to overlap by early summer. The springtime evolution of Pseudocalanus distributions in this region is driven by a complex mixture of hydrodynamic transport and species-specie c population dynamics, including both growth and mortality.
Reference Key
openalex_W2124065334 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Dennis J. McGillicuddy, Ann Bucklin
Journal journal of marine research
Year 2002
DOI
10.1357/002224002762324185
URL
https://doi.org/10.1357/002224002762324185
Keywords Keywords not found

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