Trace element stoichiometry of marine plankton & its effect ... - IMBER

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Talk Outline 1. Technical challenges hll in determining dt ii plankton trace metal tl stoichiometry 2. Overview of “bulk plankton” metal stoichiometry 3. Phytoplankton‐specific metal stoichiometry ‐ evolutionary, taxonomic, environmental influences 4. Transfer efficiencies of metals to upper trophic levels. 5. Metal stoichiometry & links to the marine C cycle ‐ bacteria/phytoplankton/zooplankton ‐ C fixation, calcification & C remineralization 6. Ecological implications phytoplankton metal stoichiometry 7. Conclusions Armbrust (2009)
Metal assimilation efficiency by copepods feeding on phytoplankton (ie. diatoms) 1. Phytoplankton cellular trace metal partitioning: extracellular, cytoplasmic & membrane bound 2. Cytoplasmic trace metal pool increases by ~ 10% during stationary phase Cu Fe Co (Reinfelder & Fisher 1991, Hutchins & Bruland 1994, Chang & Reinfelder 2000)
Page 1 and 2: Twining et al. 2003 Trace element s
Page 3 and 4: Technical challenges determining pl
Page 5 and 6: What to use to normalize the trace
Page 7 and 8: Overview of “bulk plankton” met
Page 9 and 10: But there is significant variabilit
Page 11 and 12: Phytoplankton‐specific metal stoi
Page 13: Interactions between trace metals a
Page 17 and 18: Talk Outline 1. Technical challenge
Page 19 and 20: Trace metal effects on the marine C
Page 21 and 22: Changes in relative trophic positio
Page 23 and 24: Why do pennate diatoms dominate iro
Page 25 and 26: Iron storage molecule ferritin disc
Page 27: Conclusions • Metal stoichiometry

Trace element stoichiometry of marine plankton & its effect ... - IMBER

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