Lake Peipsi 2002 (Phytoplankton samples)

Method: Phytoplankton samples were preserved in Lugol’s (acidified iodine) solution and counted under an inverted microscope (Utermöhl, 1958). 3 ml of preserved sample was settled overnight and counte

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Lake Peipsi 1985 (Phytoplankton samples)

Method: Up to 1988 the samples were preserved with formaldehyde (not neutralised), and lots of samples were spoiled: sample sediment was flaked, stuck together, or rusty. By this reason, a number of r

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Lake Peipsi 1979 (Phytoplankton samples)

Method: Up to 1988 the samples were preserved with formaldehyde (not neutralised), and lots of samples were spoiled: sample sediment was flaked, stuck together, or rusty. By this reason, a number of r

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Lake Peipsi 1975 (Phytoplankton samples)