Spring Phytoplankton Abundance and Productivity in Grand Traverse Bay, Lake Michigan, 1970
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Date
2011-04-29Author
Stoermer, E.F.
Schelske, C.L.
Santiago, M.A.
Feldt, L.E.
Metadata
Show full item recordSubject
Grand Traverse Bay; Lake Michigan; Phytoplankton; Elk River; Boardman River; Michigan Sea Grant; Sampling; Standing Crop; ProductivityAbstract
In May 1970, phytoplankton abundance in Grand Traverse Bay ranged
from 1455 cells/ml to 3355 cells/mi. Highest standing crop estimates were obtained
from stations in the lower portion of the west arm. Lowest standing crop estimates were
obtained from stations in the upper east arm. The same populations dominated the
assemblages at all stations and estimated diversity of assemblages was relatively high
and uniform, ranging from 2.3 to 2.6,
Estimates of primary productivity from the same stations ranged from 3.8 mg
C m3 hr to 9.1 mg C m3 hr1 and followed the same general pattern of areal distribution
as the standing crop estimates.
In June, standing crop estimates increased significantly, with values ranging from
2500 cells/ml to 6469 cells/ml. Highest standing crops again were found at stations in
the lower west arm, in the vicinity of Traverse City. Similar dominant populations
were present again at all stations, but estimated diversity of the assemblages at all
stations decreased, with values ranging from 1.8 to 2.2.
Estimates of primary productivity were more variable during the June sampling
period, with values ranging from 2.7 mg C m hr- 1 to 13.4 mg C m~3 hr- 1 , with
greatest differences again being between most productive stations in the lower west arm
and least productive stations in the upper east arm. (Key words: Phytoplankton;, standing crop; productivity; Grand Traverse Bay).