Remote sensing of biologically reworked sediments: a laboratory experiment
De Backer, A.; Adam, S.; Monbaliu, J.; Toorman, E.; Vincx, M.; Degraer, S. (2009). Remote sensing of biologically reworked sediments: a laboratory experiment. Est. Coast. 32(6): 1121-1129. https://dx.doi.org/10.1007/s12237-009-9204-6
In: Estuaries and Coasts. Estuarine Research Federation: Port Republic, Md.. ISSN 1559-2723; e-ISSN 1559-2731
Related to:
De Backer, A.; Adam, S.; Monbaliu, J.; Toorman, E.; Vincx, M.; Degraer, S. (2010). Remote sensing of biologically reworked sediments: a laboratory experiment, in: De Backer, A. The mud shrimp Corophium volutator: a key species in tidal flat sedimentary processes? = De slijkgarnaal Corophium volutator: een sleutelsoort in sedimentprocessen van slikken?. pp. 49-64, more
The present study aims to test the application of remote sensing to address the impact of bioturbation on physical sediment properties. Therefore, a laboratory experiment was developed, using microcosms mimicking a marine intertidal water–sediment interface to test the influence of Corophium volutator densities on sediment properties. Three main variables (water content, clay content, and mean grain size) were measured in three treatments (no Corophium, 5,000 Corophium per square meter, and 20,000 Corophium per square meter) after 16 days of bioturbation. Results obtained with conventional—destructive—techniques showed a significant increase of water content and a significant, but small decrease of clay content in the presence of Corophium. The remote sensing technique detected the impact of Corophium on water content as an increase in absorption at 1,450 nm, but was not able to detect the animal impact on clay content. This study demonstrates that remote sensing data could be significantly modified by bioturbation activities and that remote sensing can be applied in the laboratory to address the impact of bioturbation on sediment properties. This possibly opens new perspectives for longterm experiments concerning the role of bioturbation on sedimentary processes.
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