Research-Educational Center “Baikal“
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Baikal School
“Physical Limnology and Limno-Physics and Sediment Archives”
Field studies of zooplankton
On13-16 March
2008, researchers of Limnological Institute SB RAS and Tomsk State University carried out field
studies of zooplankton within the framework of the School “Physical Limnology and Sedimentology”.
Unique samples were collected from surface to bottom (up to 1450 m) for analyzing zooplankton distribution and ratio between living and dead organisms in different layers. Moreover, some samples were collected for studying feeding of plankton crustaceans in ice period.
A device for
recording holographic images was mounted during field studies. Holographic methods allow to
register water volume containing plankton species without disturbing it. One reconstructed hologram
may give information on spatial distribution of particles in water, their type of movement and size
distribution. Using a reconstructed holographic image it is also possible to examine form, size and
species characteristics of each plankton specimen which is present in the water sample. A camera is
used in digital holography for hologram registration. The digital reconstruction process is carried
out on a computer. There is a possibility to send holograms through communication line, to perform
a preliminary digital processing of a hologram before image reconstruction, as well as to record
holographic films. Each frame of such a film is a hologram which contains information on the object
studied. Thus, it is possible to study plankton within space and time.
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