|Copepod-based food webs: auklets and oceanography in the Bering Sea|
Springer, A.M.; Roseneau, D.G. (1985). Copepod-based food webs: auklets and oceanography in the Bering Sea. Mar. Ecol. Prog. Ser. 21: 229-237
In: Marine Ecology Progress Series. Inter-Research: Oldendorf/Luhe. ISSN 0171-8630, more
|Authors|| || Top |
- Springer, A.M.
- Roseneau, D.G.
The distribution of copepod biomass in the Bering Sea apparently governs the numbers and distribution of nesting least auklets Aethia pusilla, which feed principally on copepods during the breeding season. Least, auklets prey on 3 species of large calanoids, 2 characteristic of the outer shelf domain and 1 of the middle shelf domain of the Bering Sea, in proportions determined by their availability. Copepod production in the outer shelf domain is high and relatively tightly coupled to upper trophic levels; thus, competition for copepod biomass may limit the number of auklets in the southeastern Bering Sea. A well developed advective regime across the northern shelf, originating along the continental slope, apparently supplies copepods to the Bering Strait region Advective replenishment of copepods and absence of significant competition might explain why auklet populations there are much larger than on the southeastern shelf. Recent demographic changes in populations of auklets and piscivorous seabirds suggest possible multi species interactions among members of copepod-based food webs in the Bering Sea.