Année de publication
2016

Journal

Limnology and Oceanography
Volume
61
Ticket
3
Date de publication
05/2016
Nombre de pages
1087-1100
DOI
10.1002/lno.10276
URL
http://dx.doi.org/10.1002/lno.10276
Numéro ISSN
1939-5590
Résumé

<p>Surface water samples of size-selected seston (0.7–20 μm) were collected from April 2013 to September 2013 at three similar coarse-sand benthic habitats. Additionally, seston sampling was performed at a fixed location throughout a complete tidal cycle (2014). A combination of fatty acid (FA), isotope, and flow cytometry analyses were used to determine the quality and quantity of nano- and pico-sized particulate organic matter (POM). High variability was found between fatty acid replicate samples. Similar temporal patterns were observed at two sheltered sites, while the exposed site displayed less pronounced seasonal changes. Lower concentrations of 16C and 18C polyunsaturated fatty acids were found during low tide sampling. Globally, POM was dominated by picoeukaryotes, with concentrations exceeding 50,000 cells mL−1, and (16:4ω3 + 18:3ω3)/Σω3 is proposed as novel biomarker of picoeukaryotes in this region.</p>