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

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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 Station P in the northeast Pacific. Salps occurred largely in the top 60 m, with from 76 to 3621 mg C m⁻². Three approaches were taken to estimate the grazing C . bakeri removed from 1.6 to 136.6% of daily primary production and 1.3 to 56.8% diatom stocks in August 1988. On average, feeding rates of the salps predicted ≥5.0 μm from 1.2 to 49.2% of the water column per day in 1984 and 1988. Although N appears negligible, production of fecal C and N can be high, as much as 875 mg C N m⁻² d⁻¹ at the highest population density sampled Although the salps probably do grazing impact on the small cells (≤5.0 μm) which are responsible for most of the they may be important in controlling populations of diatoms which typically occur in Station P.
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