quantitative analyses of periphyton biomass and ... - SUNY Oneonta

Monthly and Seasonal Average Data for Biomass and the Parameters
Biomass monthly averages were calculated from data collected 6 June
1991 to 20 November 1991 and from 8 January 1992 to 24 June 1992. The
beginning and ending dates of each collection (13 total) are shown in
Appendix C. From February 1992 to June 1992, the monthly averages for the
six parameters, total phosphorus (T.P0 4 ), nitrates (N0 3 ), chlorides (CI),
turbidity (TRB), velocity (VEL), and water temperature (TMP), were calculated
from 1991 data. The monthly temperature averages for streams 1, 2, 6, and 20
were from 1992 data. Biomass and the other parameter data were also
calculated seasonally. The collection months were divided into seasons as
follows: summer = June· August, fall = September· November, winter =
February and March, and spring =April· June.
Data Preparation
The baseline and storm event data for the six parameters collected in the
nine tdbutaries and the Susquehanna River were recorded in spreadsheet
format using Quattro Pro (Borland International, Inc. 1992). Measurements for
T-P0 4 • N0 3 , and CI were then integrated, using Sigma Plot (Jandel Scientific
1990) to accurately account for the differences in concentrations between
baseline and storm event data during each month. By using integration, the
concentrations of each parameter could be calculated for days when analysis
of the parameters was not performed. The average monthly concentrations,
therefore, include a concentration for every day of the sampling month.
Monthly turbidity averages were obtained by averaging the turbidity for
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