Benthic Flux rates. Measurement of flow rates through and fluxes from individual tubes and burrows of benthic organisms

Updated 2003-07-02

To asses the utility of a new range of microelectrode sensors in measuring the flux rates of oxygen and nutrients across the sedimentary diffusive boundary layer and into and through macrofaunal tubes and burrow structures.

Time frame

Status
Completed
Project time span
1998 - 2000
Data collection
not specified
Data processing
not specified
Data reporting
not specified

Contact information

Contact person
Tom Pearson
Address
Dunstaffnage Marine Research Lab. P.O. Box 3 Oban, Argyll PA34 4AD U.K.
Phone
+44 1631 559 226
Email
-

Parameters and Media

Parameter groups measured/observed/modelled
Biological effects
Media sampled/studied/modelled
Marine benthos
Marine sediments
Additional information or further specification of types of data / information collected, species / tissues / organs sampled, etc.

oxygen profiles, sulphide, flow sensor, burrows, tubes, polychaete, Melinna cristata, Maldane sarsi, bioturbation, Brissopsis lyrifera, Calocaris macandrea

Geography

Regions studied
Kristineberg Marine Research Station
Sweden

Data availability

Samples/specimens archived in specimen banks?
No

Methods & Procedures

Procedures and methodology used for, e.g., sampling and sample storage, sample pretreatment, extraction and analysis, including which laboratories are involved, references to methods employed, etc.

Undisturbed boxcore samples of sediment taken from Gullmarsfjord were established in a temperature controlled experimental aquarium room.Microelectrodes were set up to sense flow rates, nitrate and oxygen levels at an appropriate series of burrow and tube entrances and through the diffusive boundary layer and upper sedimentary column in box cores containing differing species and species associations from the fine sediments found at 70m depth in the upper Gullmarsfjord. The microelectrodes were mounted in a micro-manipulator which permitted the sensor tip to be moved up, down or laterally at intervals. Sensor measurements were logged on a Unisense Picoammeter PA2000 and a Chart Pen Recorder.

Additional Information

Is this a bi- AND multi-lateral project (i.e. a project involving cooperation between different countries)?
No
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