The trace metal composition of marine phytoplankton.
Trace metals are required for numerous processes in phytoplankton and can influence the growth and structure of natural phytoplankton communities. The metal contents of phytoplankton reflect biochemical demands as well as environmental availability and influence the distribution of metals in the ocean. Metal quotas of natural populations can be assessed from analyses of individual cells or bulk particle assemblages or inferred from ratios of dissolved metals and macronutrients in the water column. Here, we review the available data from these approaches for temperate, equatorial, and Antarctic waters in the Pacific and Atlantic Oceans. The data show a generalized metal abundance ranking of Fe≈Zn>Mn≈Ni≈Cu≫Co≈Cd; however, there are notable differences between taxa and regions that inform our understanding of ocean metal biogeochemistry. Differences in the quotas estimated by the various techniques also provide information on metal behavior. Therefore, valuable information is lost when a single metal stoichiometry is assumed for all phytoplankton.
Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, USA. btwining@bigelow.org
Benjamin S
BS
Twining
Stephen B
SB
Baines
D008670:Metals / Q000737:chemistry*; D009792:Oceans and Seas; D010839:Phytoplankton / Q000737:chemistry*; D014131:Trace Elements / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry
D008670:Metals; D014131:Trace Elements; D014874:Water Pollutants, Chemical