Response of seabirds to thermal boundaries in the tropical Pacific: the thermocline versus the Equatorial Front

By L. B. Spear, L. Ballance, D. Ainley. 2001

144 citations recorded by the source corpus.

Subfields: Ecology, Global and Planetary Change

View Paper: https://www.semanticscholar.org/paper/a03185f7dfdb7997b58e0e92e233b43de484cc04

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Citations in the corpus

Foraging strategy of a tropical seabird, the red- footed booby, in a dynamic marine environment (2005, background): “In the Pacific Ocean (Au & Pitman 1986, Ballance et al. 1997), RFBs are generally observed feeding in association with sub-surface predators such as tuna, or dolphins, that chase prey to the surface, making them available to seabirds.”
Foraging dynamics of seabirds in the Eastern tropical pacific ocean (2007, methodology): “These surveys were conducted using 600-m wide transects (details in Spear et al. 2001), in which we recorded 92,696 birds representing the ETP avifauna (69,246 after counts were corrected for the effect of bird fl ux through the survey strip [Spear et al. 1992]; fl ight speeds from Spear and Ainley…”
Oceanographic influences on seabirds and cetaceans of the eastern tropical Pacific: A review (2006, background): “In addition, Ainley and Boekelheide (1983) found consistent peaks in species turnover when crossing the Equatorial Front, and speculated that the large changes in sea surface temperature and salinity there serve as an avifaunal boundary, with surface temperature and salinity characteristics represen”
Marine bird and cetacean associations with bathymetric habitats and shallow-water topographies: impl (2004, background): “…in water density and the degree of vertical stratification promote the aggregation of weakly swimming prey at discontinuities, which in turn provides enhanced feeding opportunities for many marine predators (Hunt et al., 1990, 1996, 1998; Franks, 1992; Ribic and Ainley, 1997; Spear et al., 2001).”
Foraging strategy of a top predator in tropical waters: great frigatebirds in the Mozambique Channel (2004, unknown): “The foraging ecology of tropical seabirds has been studied at various places of the world during oceanic cruises (e. g. Bailey 1968, Pocklington 1979, Ballance et al. 1997, Spear et al. 2001).”
Physical and biological variables affecting seabird distributions during the upwelling season of the northern California Current (2005, background): “…tropical Pacific, but using a larger study area and only physical and temporal variables (e.g., SST, SSS, depth and slope of thermocline, date), Spear et al. (2001) were able to explain just 8.3% and 20.7%, respectively, of the variance in the abundance of planktivorous and piscivorous avian…”
Seabird community structure in a coastal tropical environment: importance of natural factors and fish aggregating devices (FADs) (2004, background): “Most studies on the distribution and abundance of tropical seabirds have focused over the oceanic waters of the Pacific Ocean (Ashmole 1971, Au & Pitman 1986, Ballance & Pitman 1992, Ballance et al. 1997, Spear et al. 2001).”
Sub-surface hotspots in shallow seas: fine-scale limited locations of top predator foraging habitat indicated by tidal mixing and sub-surface chlorophyll (2010, background): “However, some of the studies mentioned above stress the point that not all marine mammals and seabirds forage preferentially at the fronts (Ballance et al. 2006, Spear et al. 2001).”
Movements, at-sea distribution and behaviour of a tropical pelagic seabird: the wedge-tailed shearwater in the western Indian Ocean (2009, background): “…and ice edges, upwelling zones, etc.), tropical seabird species seem to rely to a much greater extent on fish and squid forced to the surface by diving predators (Ballance & Pitman 1999, Spear et al. 2001, Jaquemet et al. 2004), the location and timing of which is unpredictable (Weimerskirch 2007).”
The importance of oceanographic fronts to marine birds and mammals of the southern oceans (2009, background): “Overall the highest densities of fish-eating species predicted by models correspond to areas with a sharp thermocline or a well stratified water column which are also favourable areas for foraging tunas and dolphins (Ballance et al., 2001; Spear et al., 2001).”
Diving seabirds share foraging space and time within and among species (2010, background): “As mechanisms leading to the spatial segregation we propose a combination of optimal foraging and avoidance of predation.”
Quantifying habitat use and preferences of pelagic seabirds using individual movement data: a review (2009, background): “Furthermore, the mixed layer depth can now be predicted with remotely sensed data (Zawada et al. 2005), and further investigations of its influence on habitat use would be profitable (Spear et al. 2001, Vilchis et al. 2006).”
Habitat preference, accessibility, and competition limit the global distribution of breeding Black-browed Albatrosses (2011, background): “…and abundance data collected by ship-based surveys can provide insights into the spatial ecology of these animals (e.g., Hunt et al. 1996, Spear et al. 2001, Ballance et al. 2006, Louzao et al. 2006) such Eulerian studies are limited because they tend to provide only partial spatial and…”