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Spectral and biochemical characteristics of the particulate matter in bedford basin


Journal of the Fisheries Research Board of Canada 36(2): 211-218
Spectral and biochemical characteristics of the particulate matter in bedford basin
A survey of the distribution, nature and biochemical composition of particulate matter (less than 153 .mu.m diameter) showed that small particles (< 18 .mu.m) made up the bulk of the particulate matter during most of the summer. Relatively large amounts of microzooplankton (tintinnids) were also recorded during the period of stable hydrographic conditions. Diatoms and dinoflagellates were abundant only in early fall prior to the fall bloom. All cell counts were transformed into ppm on a volume basis to compare with Coulter Counter data. Cell counts on preserved samples strongly underestimated the number and volume of small particles and did not take into account the detritus. Considerations of the ATP content strongly suggested that for naturally occurring particulate matter there is not a constant ATP to C ratio but rather an upper and lower limit. Small particles were the main repository for protein whereas phytoplankton was the repository for carbohydrates. The high variability of both quality and quantity of particles in the neritic habitat suggests that a single chemical variable cannot describe fully the nutritive value of naturally occurring suspended matter.

Accession: 006459479

DOI: 10.1139/f79-031

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