Effect of short-term hypoxia on the feeding activity of abundant nematode genera from an intertidal mudflat

Effect of short-term hypoxia on the feeding activity of abundant nematode genera from an... The effect of short-term hypoxia (6 days) on the feeding activity of abundant nematode genera was investigated by means of a tracer experiment. Nematodes were sampled from the Paulina intertidal flat in the Westerschelde estuary (south-west Netherlands) and incubated with 13 C pre-labelled diatoms at the sediment-water interface in oxic and hypoxic treatments. In general, specific uptake and uptake of carbon per unit of nematode carbon were low in all studied genera, which indicated that the added diatoms represented a limited food source for the investigated nematode genera. Results from such a low uptake are difficult to interpret; however, there was no significant decrease in feeding activity of all dominant nematodes in the hypoxic treatments. The low carbon uptake might be related to low access of nematodes and their low feeding preference to the added diatoms in the experimental cores. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nematology Brill

Effect of short-term hypoxia on the feeding activity of abundant nematode genera from an intertidal mudflat

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Publisher
Brill
Copyright
Copyright 2017 by Koninklijke Brill NV, Leiden, The Netherlands.
Subject
Articles
ISSN
1388-5545
eISSN
1568-5411
D.O.I.
10.1163/15685411-00003028
Publisher site
See Article on Publisher Site

Abstract

The effect of short-term hypoxia (6 days) on the feeding activity of abundant nematode genera was investigated by means of a tracer experiment. Nematodes were sampled from the Paulina intertidal flat in the Westerschelde estuary (south-west Netherlands) and incubated with 13 C pre-labelled diatoms at the sediment-water interface in oxic and hypoxic treatments. In general, specific uptake and uptake of carbon per unit of nematode carbon were low in all studied genera, which indicated that the added diatoms represented a limited food source for the investigated nematode genera. Results from such a low uptake are difficult to interpret; however, there was no significant decrease in feeding activity of all dominant nematodes in the hypoxic treatments. The low carbon uptake might be related to low access of nematodes and their low feeding preference to the added diatoms in the experimental cores.

Journal

NematologyBrill

Published: Jan 1, 2017

Keywords: food uptake; intertidal nematodes; stable isotope; Westerschelde estuary

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