1982
DOI: 10.3354/meps010101
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Fronts and Seabird Aggregations in the Southeastern Bering Sea

Abstract: A number of recent studies suggest that biological activity may be enhanced at fronts, which mark the boundary between water masses. Concurrent bird and physical oceanographic data were collected along a transect that crosses 3 fronts in southeastern Bering Sea. A simple regression-against-distance model was used to describe location and structure of bird aggregations along this transect. Significant bird aggregations coincided with 2 of the 3 fronts, 1 at the shelf break and 1 associated with the 50 m isobath… Show more

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Cited by 67 publications
(46 citation statements)
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“…Data on water column structure were obtained by lowering a CTD probe to within 5 m of the bottom at stations located 9.3 km apart out to 37.1 km from the islands and a t stations located 18.5 km apart between 37.1 and 74.1 km from the islands. The location of the front on each transect was determined by calculating the difference in temperature between adjacent stations a t 10 m depth intervals summed throughout the water column (Schneider 1982). For each transect, the location of the front was determined to be between the 2 stat~ons having the highest horizontal gradient in temperature.…”
Section: Methodsmentioning
confidence: 99%
See 1 more Smart Citation
“…Data on water column structure were obtained by lowering a CTD probe to within 5 m of the bottom at stations located 9.3 km apart out to 37.1 km from the islands and a t stations located 18.5 km apart between 37.1 and 74.1 km from the islands. The location of the front on each transect was determined by calculating the difference in temperature between adjacent stations a t 10 m depth intervals summed throughout the water column (Schneider 1982). For each transect, the location of the front was determined to be between the 2 stat~ons having the highest horizontal gradient in temperature.…”
Section: Methodsmentioning
confidence: 99%
“…Flows associated with fronts can maintain the physical property gradients at the frontal interface, and can also increase the local biomass of phytoplankton and zooplankton by enhancing either the production or the accumulation of organisms in the frontal region (Pingree et al 1974, Le Fevre 1986 Many studies have shown that marine predators are attracted to spatially predictable aggregations of prey found in frontal regions. Relatively high densities of fish (Fiedler & Bernard 1987, Herron et al 1989, Podesta et al 1993, marine birds (Schneider 1982, Kinder et al 1983, Haney & McGillivary 1985, Schneider et al 1987, 1990, Brown PL Gaskin 1988Gaskin , al. 1992 have been observed at fronts.…”
Section: Introductionmentioning
confidence: 99%
“…Primary productivity at the shelf break is approximately 60-270% higher than that in the outer shelf and ocean domains (Springer and McRoy, 1993;Springer et al, 1996). High productivity along the shelf break supports large numbers of zooplankton, fish and squid (Radchenko, 1992;Sinclair and Stabeno, 2002), which in turn attracts high numbers of marine mammals and seabirds (Piatt and Springer, 2003;Schneider, 1982). Further south, the Aleutian Islands form the border between the Bering Sea and the North Pacific Ocean, and the combination of strong currents, abrupt topography and distinct water masses from the two separate water basins promotes high primary productivity and also sustains large numbers of predators Springer et al, 1996).…”
Section: Study Systemmentioning
confidence: 99%
“…1). Both the continental shelfbreak and the Aleutian shelf-break are characterized by elevated productivity, and provide important foraging grounds for seabirds in the Bering Sea Schneider, 1982;Springer et al, 1996). Although murre diets have been quantified at the three colonies (e.g., Iverson et al, 2007;Renner et al, 2012;Sinclair et al, 2008), very little is known about where murres from these colonies forage (Kokubun et al, 2008;Takahashi et al, 2008).…”
mentioning
confidence: 99%
“…This enhancement effect can yield elevated localized densities, 10-100 times larger than the background levels for a given water mass (Hunt et al, 1996;Begg and Reid, 1997;Hoefer, 2000). There is ample evidence that seabirds aggregate at narrow frontal systems (Rossby radiuso10 km) within productive sub-polar and temperate continental shelves (e.g., for a review see Schneider, 1982;Hunt and Schneider, 1987;Schneider et al, 1987;Hunt et al, 1999). However, very little research has been devoted to characterizing seabird aggregation and community structure across oceanic fronts, especially in unproductive subtropical waters with low bird densities (but see Spear et al, 2001).…”
Section: Discussionmentioning
confidence: 99%