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Microzooplanktonic grazing in the western Wadden Sea during the early spring bloom of 2013

Harten, MR. van (2016) Microzooplanktonic grazing in the western Wadden Sea during the early spring bloom of 2013. Research Project 2 (major thesis), Marine Biology.

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Abstract

Grazing by microzooplankton is an important factor during spring bloom formation both for phytoplankton and for higher trophic levels. We try to quantify the strength of microzooplanktonic grazing with the dilution method, both with the traditional measure of chlorophyll α and flowcytometry. While in open ocean systems chlorophyll can be used for estimating grazing pressure, in coastal sytems (where diatoms dominate spring blooms which are less grazed by microzooplankton) discrepancies may be found. We found strong grazing on small phytoplankton but non on larger species using flowcytometry. With the chlorophyll analyses little grazing pressure was found. It can be concluded that using cholorphyll α when measuring microzooplanktonic grazing might lead to an underestimation of actual grazing.

Item Type: Thesis (Research Project 2 (major thesis))
Degree programme: Marine Biology
Thesis type: Research Project 2 (major thesis)
Language: English
Date Deposited: 15 Feb 2018 08:23
Last Modified: 15 Feb 2018 08:23
URI: http://fse.studenttheses.ub.rug.nl/id/eprint/14306

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