Fe, Zn, Mn and N transfer between size classes in a coastal phytoplankton community: Trace metal and major nutrient recycling compared

Authors: D.A. Hutchins; K.W. Bruland

Source: Journal of Marine Research, Volume 53, Number 2, 1 March 1995 , pp. 297-313(17)

Publisher: Sears Foundation for Marine Research

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Abstract:

Experiments were performed to investigate transfer of ⁵⁹Fe, ⁶⁵Zn, ⁵⁴Mn, and ¹⁵N from labeled cyanobacteria to the large (>8 mgr

m or >5

m) phytoplankton size class from Monterey Bay, California. Transfer of metal isotope activity was measured from and into total (for all isotopes) and intracellular (⁵⁹Fe only) pools. Results demonstrated rapid and efficient transfer of nitrogen to the large phytoplankton size class; intracellular ⁵⁹Fe was transferred into the intracellular and total pools of the >8 mgr

m phytoplankton size class 70% and 130% as efficiently as nitrogen, respectively. ⁶⁵Zn and ⁵⁴Mn were transferred between size classes 48% and 23% as efficiently as N. Extracellular ⁵⁹Fe and ⁶⁵Zn from the added cyanobacteria also appeared quickly in the large size fraction, although most of the Fe transfer appeared to be the result of surface adsorption rather than biological uptake. These data are discussed in relation to the biological recycling efficiencies of the four elements and the resulting implications for biogeochemical cycling of trace and major nutrient elements.

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Document Type: Research article

DOI: http://dx.doi.org/10.1357/0022240953213197

Publication date: 1995-03-01

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