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

Streams 17, 16, 20, and 6 were characterized as agricultural, streams
15, 5, 9, and 4 were characterized as forested, and stream 2 was characterized
as urban. The Susquehanna River, the main outlet of the lake, was not
characterized as the other streams were because this study focused mainly on
the land use practices and water quality in the watershed that affect Otsego
Lake.
Biomass
Biomass of periphyton in each stream was collected monthly over a one
year period from 6 June 1991 - 24 Juna 1992. However, there is a gap in the
data. Measurements from the end of November 1991 to the beginning of
January 1992 could not be collected at any of the sampling sites due to high
water levels, fast water velocities, and ice cover on the streams. These
conditions made it impossible to find and/or keep the artificial substrate holders
in the streams. There were a total of 13 collections during the year.
In some streams the monthly collections are widely spaced, temporally,
due to weather conditions or at other times, the artificial substrates may have
been vandalized. Streams with a total of 13 monthly collections for ci-liorophyll
a and ash-free dry weight (AFDW ) include 16, 17, and 20. Stream 6 had 13
monthly collections for AFDW only (see map in Figure 1 for location and name
of the streams and Figure 8 for number of collections for each stream). The
other streams vary in number of collections. The calculated monthly averages
of chlorophyll a and AFDW for each stream during each collection period are
shown in Appendix E.
22