Strong, dissolved, copper-complexing ligands are known to control copper speciation and bioavailability in most marine waters. We are testing the hypothesis that metal-responsive production of such ligands occurs in the Elizabeth River estuary, and that picoplankton and bacterioplankton produce the ligands. Recent studies utilizing cultures of marine picoplankton (Synechococcus) and bacteriopla...

We studied removal rates of plankton and total particulate organic nitrogen (PON) by benthic reef communities from the overlying water in a large experimental flume. The flume was filled with mixtures of coral and coral rubble, and biomass of plankton was measured as water was recirculated over the experimental benthic community. All planktonic particle types, picoplankton, nanoplankton, microp...

Picoplankton populations dominate the planktonic community in surface oligotrophic ocean. Yet, their strategies acquisition and partitioning of organic inorganic sources nitrogen (N) carbon (C) are poorly described. Here, we measured at single-cell level uptake dissolved C (C-fixation), C-leucine, N-leucine, nitrate (NO3?), ammonium (NH4+), N-urea pigmented nonpigmented picoplankton groups six ...

Feeding of the different developmental stages of Calanipeda aquaedulcis on natural particles (bacterio-, phytoand microzooplankton) was measured in a Mediterranean salt marsh (Empordà wetlands, NE Iberian Peninsula). Bottle incubations were performed in the field both in autumn and spring. The results showed differences in the diet of the different developmental stages due to both prey type and...