A time series of benthic flux measurements from Monterey Bay, CA

Berelson, W., McManus, J., Coale, K., Johnson, K., Burdige, D., Kilgore, T., … Boucher, J. (2003). A time series of benthic flux measurements from Monterey Bay, CA. Continental Shelf Research, 23(5), 457-481.
Metadata
TitleA time series of benthic flux measurements from Monterey Bay, CA
AuthorsW. Berelson, J. McManus, K. Coale, K. Johnson, D. Burdige, T. Kilgore, D. Colodner, F. Chavez, R. Kudela, J. Boucher
AbstractIn situ incubation chamber measurements of benthic nutrient recycling rates were made on the Monterey Bay shelf at 100 m during various years and seasons. Variability in nutrient (Si, PO42+, NH3, NO3−) and trace metal (Mn, Fe (II), Cu) fluxes correlate with variability in the amount of organic carbon oxidized on the sea floor. Patterns of primary productivity show a mid-year maxima, consistent with the timing of increased rates of benthic Corg and opal recycling. High rates of Corg rain to the shelf promote nitrate consumption at a rate that equals or exceeds ammonia efflux. Low rates of Corg rain promote greater efflux of DIN; thus these margin sediments provide a negative feedback to local productivity cycles. The efflux of iron (II) from shelf sediments is sufficient to support >100% of new production, yet Fe flux is positively correlated with Corg recycling which lags the maximum in new production. On account of this time lag, diagenetically recycled Fe is not likely a micro-nutrient trigger of new production, but could serve as a positive feedback. Bio-irrigation rates are seasonally variable by 30% but maximal during the maximum productivity months.
JournalContinental Shelf Research
Date2003
Volume23
Issue5
Start page457
End page481

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