Journal: Limnologica: Ecology and Management of Inland Waters
Location: Lake Tegel, Berlin, Germany

Fine polymer resin particles 2.4μm in diameter were stained with 7-amino-4-methylcoumarin (AMC), and Chlorella vulgaris (a single-celled alga) was labelled with fluorescein-5-isothiocyanate (FITC). The fine polymer particles were ingested by several groups (chironomids, microcrustaceans, oligochaetes and tardigrads), whereas Chlorella was only taken up by oligochaetes, and over 85% of particles ended up in the top centimetre of sediment within 14 days. In plexiglass sediment cores, <1mm dried alder leaf fine particulate organic matter (FPOM) stayed within the top 2-3cm of sediment, with finer particles deepest. 65-96% of algae settled there were attached to sand, restricting vertical transport.

Gunker G, Beulker C, Hoffmann A, Kosmol J, 2008. “Fine particulate organic matter (FPOM) transport and processing in littoral interstices – use of fluorescent markers.” Limnologica, in press, doi:10.1016/j.limno.2008.11.001
Affiliations: Berlin University of Technology