Abundance and grazing effects of Cyclosalpa bakeri in the subarctic Pacific Public Deposited

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Article appears in Marine Ecology Progress Series and is copyrighted by Inter Research.

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  • Ecological effects of populations of the salp Cyclosalpa bakeri were studied in late summer of 1984, 1987 and 1988 dunng the Subarctic Pacific Ecosystem Research (SUPER) project at Station P in the northeast Pacific. Salps occurred largely in the top 60 m, with biomass values ranging from 76 to 3621 mg C m⁻². Three approaches were taken to estimate the grazing impact of these populations. C . bakeri removed from 1.6 to 136.6% of daily primary production and 1.3 to 56.8% of the diatom stocks in August 1988. On average, feeding rates of the salps predicted clearance of all particles ≥5.0 μm from 1.2 to 49.2% of the water column per day in 1984 and 1988. Although excretion of dissolved N appears negligible, production of fecal C and N can be high, as much as 875 mg C and 110 mg N m⁻² d⁻¹ at the highest population density sampled Although the salps probably do not have a significant grazing impact on the small cells (≤5.0 μm) which are responsible for most of the production, they may be important in controlling populations of diatoms which typically occur in late summer at Station P.
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  • description.provenance : Approved for entry into archive by Charles Miller(cmiller@coas.oregonstate.edu) on 2010-08-17T18:27:21Z (GMT) No. of bitstreams: 1 Madin_et_al_Mar_Ecol_Prog_Ser_1997.pdf: 887560 bytes, checksum: 534c6ab38f98701e12fbc48582563820 (MD5)
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  • description.provenance : Submitted by David Moynihan (dmscanner@gmail.com) on 2010-08-16T17:23:40Z No. of bitstreams: 1 Madin_et_al_Mar_Ecol_Prog_Ser_1997.pdf: 887560 bytes, checksum: 534c6ab38f98701e12fbc48582563820 (MD5)
  • Vol. 157 (1997)
  • Marine Ecology Progress Series

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