Planktonic response to light as a pollution indicator |
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| Affiliation: | 1. Departament de Projectes d''Enginyeria i la Construcció, Universitat Politècnica de Catalunya/BARCELONATECH, Barcelona, Spain;2. Facultade de Óptica e Optometría, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Galicia;3. Departamento de Física de la Tierra y Astrofísica, Facultad de Ciencias Físicas, Universidad Complutense, Madrid, Spain;4. Parc Astronòmic Montsec, Camí del coll d''Ares s/n, Àger, Lleida 25691, Spain;5. Departament de Física Quàntica i Astrofísica, Institut de Ciències del Cosmos (ICCUB), Universitat de Barcelona (IEEC-UB), Barcelona, Spain;1. Nicolaus Copernicus Astronomical Center, Warsaw, Poland;2. Space Informatics Lab, University of Cincinnati, OH, USA |
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| Abstract: | Ecological monitoring requires sensitive and effective approaches to detecting polluting substances. One such approach involves tracking the behavioral responses of plankton that is initially adapted to normal habitat conditions. Zooplankton such as Daphnia are filter feeders that are highly sensitive to pollution. We describe how a submersible holographic camera with additional attracting lighting (at a wavelength of 532 nm) can be used to track changes of Daphnia response to light for a number of pollutants, including potassium dichromate and crude oil. Our laboratory experiments showed that the sensitivity of this method of bioanalysis is comparable to standard laboratory methods, but has the additional advantage that it can be used in real time in lakes and other water areas, and hence is more versatile than standard methods. |
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| Keywords: | Digital holography Biomonitoring Plankton Behavioral responses Phototropism |
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