2024-03-29T05:16:32Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/165672020-11-19T07:22:40Zcom_10261_123com_10261_8col_10261_376
The trophic roles of microzooplankton in marine systems
Calbet, Albert
Grazing
Herbivory
Microzooplankton
Oligotrophy
Primary production
Upwelling
7 pages, 6 figures
Microzooplankton (here defined as <200 µm grazers) are key components of marine foodwebs. Their grazing significantly affects primary producers and usually exceeds that of mesozooplankton. However, our knowledge of the detailed roles that microzooplankton taxa play in marine ecosystems is surprisingly limited. Here, I identify the main protists responsible for most of the grazing impact on phytoplankton in two contrasting marine ecosystems: oligotrophic waters and productive waters, such as upwelling systems, spring blooms, and other blooms in nearshore and estuarine systems. Evidence indicates that pico- and nano-sized flagellates, which are routinely included with the microzooplankton size class of protists, appear to be the main grazers of phytoplankton in oligotrophic habitats, whereas heterotrophic and mixotrophic dinoflagellates are candidates for the dominant grazing impact in upwelling and other productive ecosystems. Microzooplankton are also important contributors to mesozooplankton diet, especially in oligotrophic areas, although the strength of the mesozooplankton–microzooplankton link is traditionally overlooked in plankton studies. As a final remark, this review emphasizes the need to develop suitable methods for studying the role of microbial grazers in the dynamics of marine ecosystems.
This work was supported by grant CTM2004–02575/MAR from the Spanish Ministry of Education and Science. I thank E. Saiz, M. Alcaraz, E. B. Sherr, and one anonymous reviewer for helpful comments to early versions of the manuscript. I also thank H. Saito, E. B. Sherr, and B. F. Sherr for providing the pictures in Figure 3
Peer reviewed
2009-09-02T10:38:31Z
2009-09-02T10:38:31Z
2008-03
artículo
http://purl.org/coar/resource_type/c_6501
ICES Journal of Marine Science 65(3): 325-331 (2008)
http://hdl.handle.net/10261/16567
10.1093/icesjms/fsn013
en
https://doi.org/10.1093/icesjms/fsn013
none
22195 bytes
application/pdf
Oxford University Press