6006

• UCREFRP Catalog Number: 6006
• Author: Holden, P. B. and L. W. Crist.
• Title: Documentation of Changes in the Macroinvertebrate and Fish Populations in the Green River Due to Inlet Modification of Flaming Gorge Dam
• USFW Year: 1981.
• USFW - Doc Type: Final Report.
• Copyright Material: NO

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Mean diversity values for each station during each year increased
with increasing distance from Flaming Gorge Dam (Figure 3). Lowest
average values occurred near the dam at Little Hole and Taylor Flats;
highest average values were recorded at Jensen. Yampa River stations
sustained species diversity indices similar to Jensen on the Green
River. Single classification analysis of variance and the
Student-Newman-Keuls multiple comparisons among means test were used
to test for significance of difference among mean values for each year
illustrated in Figure 3 and to group similar stations on the basis of
macroinvertebrate diversity (Table 9). It should be noted that in
these tests only August and October samples each year were used since
late summer and early fall were the periods of maximum diversity and
it e 1 imi nated the bi as of samples taken duri ng spri ng runoff on the
Yampa River and at Jensen on the Green River.
Results of these analyses for each year indicated that during
1978, mean diversity values during late summer were similar at the
upper three stations on the Green River (L ittle Hole, Taylor Flats,
and Wade and Curtis). Jensen on the lower Green River and the two
Yampa River stations (Boxelder and Lily Park) were also similar, but
this set exhibited significant differences from the set of stations
comprising the upper Green River. Wade and Curtis, Boxelder, and Lily
Park were not significantly different nor were the sets of Little
Hole, Wade and Curtis, and Boxelder Park. During 1979, the three sta-
tions on the upper Green again formed a set which was significantly
different from the Yampa River stations and Jensen. The two Yampa

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