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Effects of fresh water influx from melting sea ice and glaciers in polar regions on diatom occurrence with respect to sinking rates

Sprong, P.A.A. (2012) Effects of fresh water influx from melting sea ice and glaciers in polar regions on diatom occurrence with respect to sinking rates. Bachelor's Thesis, Biology.

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Abstract

Different sized cells have similar sinking rates under growth conditions. However, sinking rates are different under nutrient deplete situations, sinking rate increases with increases in cell size. Indicating that sinking rate regulation requires energy. Water column characteristics, such as salinity, affect sinking rate. The salinity does not seem to be much different between ice-edge regions and coastal regions, and phytoplankton communities tend to be similar as well. Temperatures are rising, in the Western Antarctic Peninsula there has been an increase of 0.17 °C per decade for the last 50 years. In 2007 the sea ice cover in the Arctic reached a record minimum. With these increasing temperatures, there will be more meltwater input in the oceans surrounding Antarctica and in the Arctic. With increased melt water input, stratification will be stronger. Which will have an effect on sinking rate of a phytoplankton community. This can change the phytoplankton community, which will have an effect on higher trophic levels.

Item Type: Thesis (Bachelor's Thesis)
Degree programme: Biology
Thesis type: Bachelor's Thesis
Language: English
Date Deposited: 15 Feb 2018 07:49
Last Modified: 15 Feb 2018 07:49
URI: http://fse.studenttheses.ub.rug.nl/id/eprint/10292

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