A cruise of the R/V Yaquina off Oregon during June and July of
1968 provided data for a study of the relationships of hydrographic
and chemical parameters to estimates of biological activity. The
emphasis was on carbon and nitrogen reservoirs. Phytoplankton pigments,
nitrogen and C/N ratio were used along with AOU and the nitrate
content of the water to estimate the distribution of phytoplankton
production. Sigma-t, AOU, and nitrate were used to define the hydrographic
and chemical conditions.
Upwelling was the major source of nitrate for the surface
waters, and, consequently, phytoplankton production was most intense
where upwelling was active. The Columbia River plume appeared
to support a sizeable amount of phytoplankton production just
south of the river mouth. Particulate nitrogen increased and particulate
C/N ratio decreased as the water became more biologically
productive. Chlorophyll, particulate nitrogen, and C/N ratio showed
the effects of upwelling and the Columbia River plume on biological
production. A subsurface negative AOU core was clearly defined in
areal extent and intensity. Its occurrence was explained by inshore
phytoplankton production, oxygen exchange with the atmosphere, and
possible in situ phytoplankton production. / Graduation date: 1970
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/29040 |
| Date | 10 December 1969 |
| Creators | Ramberg, Donald Allen |
| Contributors | Small, Lawrence F. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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