Cook Plant preoperational studies 1970 / John C. Ayers ... [et al.].

TABLE 2. Phytoplankton, Station PPP-10, Cook Plant, 25 April 1969.
Distance offshore -- 0.6 miles
Secchi disc -- n.d.
Water temperature -- n.d.
Water color -- n.d.
Organism Number of Cells/liter
Colonies
Melosira spp. 2,766 18,532
Nitzschia sp. 277
Tabellaria fenestrata 12,447 71,639
Synedra ulna 11,894
Synedra acus 9,404
Fragilaria crotonensis 1,659 27,936
Cyclotella spp. 5,808
Asterionella formosa 277 1,106
Fragilaria intermedia 553 37,064
Diatoma tenue v. elongatum 553 1,936
Navicula sp. 277
3. Whether new species enter into the category of "dominant," and the
algal type of the new dominants.
4. Whether statistical measures such as diversity indices, etc. in
comparable seasons exhibit significant change over the longer period
of record.
5. Unusual changes, whether interpretable or not, and whether there is
a trend or trends in these changes.
To establish a record in which the data are adequate to carry on these
surveillances requires as early a start as possible. To provide that start
we have combined our phytoplankton data from stations in front of the Cook
Plant (Tables2 through 6) for the years 1969 and 1970. While the station
positions are not geographically coincident, they are far enough offshore to
provide some measure of the plankton algae that passed the site in the alongshore currents. The earliest of these stations (station PPP-10 of 25 April
1969) was taken by metered plankton net and is not quantitatitvely comparable
to the others, though it is of value in indicating the dominant species.

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