Effects of warm water intrusions on populations of macrozooplankton on Georges Bank, Northwest Atlantic
Bollens, Stephen M.
Madin, Laurence P.
Horgan, Erich F.
MetadataShow full item record
KeywordMacrozooplankton; Distribution; Abundance; Warm water intrusions; Slope water; Northwest Atlantic; Georges Bank
As part of the Georges Bank/North West Atlantic GLOBEC (Global Ocean Ecosystems Dynamics) Program, macrozooplankton and micronekton were collected on 30 Broad Scale Survey Cruises between January – June, 1995 –1999, using a 10 m2 MOCNESS (3mm mesh). The objective of this study is to examine the effects of warm water intrusions on populations of macrozooplankton, namely Salpa spp., Phronima spp., Neomysis americana, and Crangon septemspinosa, on Georges Bank. Salpa spp. and Phronima spp. showed a large degree of horizontal co-occurrence, being found predominantly in Upper Slope/Gulf Stream Water and Georges Bank/Gulf of Maine Water. Abundances of these taxa showed striking interannual variability, and were only abundant on the southern flank and in the Northeast Channel in late spring/early summer of 1995 and 1999, periods during which AVHRR imagery and hydrographic data showed the presence of warm water intrusions. These intrusions seemed to have little effect on the distribution of other macrozooplankton (e.g., Neomysis americana and Crangon septemspinosa). Warm water intrusions can directly affect Salpa spp. and Phronima spp. populations by advecting them onto Georges Bank, although other, more resident populations, especially those inside the 100m isobath, seem to be little affected by such intrusions.
Author Posting. © The Authors, 2004. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Continental Shelf Research 25 (2005): 143-156, doi:10.1016/j.csr.2004.07.028.
Showing items related by title, author, creator and subject.
Zhang, Weifeng G.; Gawarkiewicz, Glen G. (John Wiley & Sons, 2015-09-30)Onshore intrusions of offshore waters onto the Mid-Atlantic Bight shelf can greatly affect shelf circulation, biogeochemistry, and fisheries. Previous studies have concentrated on onshore intrusions of slope water. Here ...
Plueddemann, Albert J.; Ostrom, William M.; Galbraith, Nancy R.; Bouchard, Paul R.; Tupper, George H.; Dunn, James M.; Walsh, M. Alexander (Woods Hole Oceanographic Institution, 2002-09)The Northwest Tropical Atlantic Station (NTAS) was established to address the need for accurate air-sea flux estimates and upper ocean measurements in a region with strong sea surface temperature anomalies and the ...
Plueddemann, Albert J.; Galbraith, Nancy R.; Ostrom, William M.; Tupper, George H.; Handy, Robert E.; Dunn, James M. (Woods Hole Oceanographic Institution, 2001-07)A surface mooring outfitted for meteorological and oceanographic measurement was deployed near 14°50'N, 51°00'W in the northwest tropical Atlantic on 30 March 2001. This was the initial deployment of the Northwest Tropical ...