|
Table 4.3
Mean abundance, (standard error), and percent of total abundance
for all common species at the M54 station, by year.
Common taxa are defined as those species comprising 3% or more of
the total abundance at a station on any given year. Percent abundance is given in parentheses.
Taxa
1996
mean(stderr)
Taxa
1997
mean(stderr)
Gammarus
palustris(4.46%)
0.75(0.56)
Gammarus mucronatus(3.32%)
1.04(1.04)
Monoculodes
sp.(8.33%)
1.39(0.53)
Gammarus palustris(11.0%)
3.44(2.59)
Daphnia sp.(3.68%)
0.61(0.29)
Oligochaete sp.(17.52%)
5.48(1.37)
Edotea
sp.(3.29%)
0.55(0.32)
Marenzellaria virdis(19.69%)
6.16(2.07)
Oligochaete sp.(10.47%)
1.74(0.42)
Mediomastus spp.(12.79%)
4.0(1.49)
Marenzellaria
virdis(43.99%)
7.32(3.87)
Streblospio benedicti(13.3%)
4.16(2.12)
Mediomastus
spp.(11.05%)
1.84(0.69)
Taxa
1998
mean(stderr)
Taxa
1999
mean(stderr)
Gammarus
palustris(9.98%)
1.88(1.31)
Gammarus tigrinus(4.62%)
0.62(0.4)
Monoculodes
sp.(3.10%)
0.58(0.22)
Monoculodes edwardsi(4.05%)
0.54(0.19)
Oligochaete sp.(3.33%)
0.63(0.27)
Monoculodes sp.(6.36%)
0.85(0.41)
Marenzellaria
virdis(41.69%)
7.83(2.48)
Mediomastus ambiseta(15.61%)
2.08(0.83)
Mediomastus
ambiseta(22.39%)
4.21(1.95)
Mediomastus spp.(8.67%)
1.15(0.5)
Mediomastus
spp.(6.43%)
1.21(0.50)
Parandalia sp.(17.92%)
2.38(0.6)
Parandalia sp.A(7.23%)
0.96(0.43)
Streblospio benedicti(7.23%)
0.96(0.52)
Taxa
2000
mean(stderr)
Malacoceros vanderhosti(5.97%)
3.25(2.44)
Marenzellaria
virdis(11.85%)
6.45(3.55)
Mediomastus
ambiseta(49.59%)
27.0(9.71)
Mediomastus
spp.(7.35%)
4.0(2.79)
Streblospio
benedicti(8.45%)
4.6(2.35)
|