Plankton macro

Element Isotopes Phyto- plankton Macro- algae Zoo- plankton Molluscs (ex Cepha-lopods) Cephalo- pods Crusta- ceans Fish... 

Considering the micro-environment close to the surface of plankton cells the existence of Fe(II) complexes has been observed, even in an aerobic environment (Morel, this volume). The macro-environment represents evidently not necessarily the same conditions as the micro-environment close to the organisms. 

Classification of the plankton as a whole is often made on the basis of size (Fig. 1.9). The ultrananoplankton (or picoplankton) is composed almost entirely of bacteria, the nanoplankton of algae (phytoplankton), and the macro- and megaplankton of animals (zooplankton), mainly invertebrates. 

With respect to the mutual interactions between nutrients and ph3do-plankton, both the continuous and intermittent input of nutrients can firstly cause diatom bloom and then dinoflagellate bloom. However, the intermittent input of nutrients can affect the occurrence time and dominant species of dinoflagellate bloom. Lin et al. (1994) found that after phosphorus addition into enclosure ecosystems, the macro-ph3doplankton were the major contributor to the total biomass of ph3doplankton in October, and micro-ph3doplankton in May. 

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