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ENUMERATION OF FRESHWATER PHYTOPLANKTON CONCENTRATED ON THE MEMBRANE FILTER 1
Author(s) -
McNabb Clarence D.
Publication year - 1960
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1960.5.1.0057
Subject(s) - enumeration , membrane filter , phytoplankton , plankton , sample (material) , statistics , sampling (signal processing) , mathematics , biology , filter (signal processing) , environmental science , ecology , membrane , chemistry , combinatorics , chromatography , computer science , genetics , nutrient , computer vision
Individuals of the phytoplankton become distributed at random when concentrated on the membrane filter. The percentage of microscopic fields in which a species occurs may therefore be validly converted to a theoretical average number of individuals per field. The theoretical density thus obtained and the actual density determined by time‐consuming counting are very nearly similar values when 25 or more fields are scored. An enumeration technique using this relationship is described. It has many advantages over commonly used procedures for concentrating the plankton and estimating the number of individuals in a sample.