Table 4.4  Mean abundance, (standard error), and percent of total abundance for all common species at the M31 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)    
Marenzellaria virdis(29.81%)                20.48(8.48)                Bivalvia sp.(juv.)(5.23%)                          1.93(0.75)
Mediomastus ambiseta(5.82%)            4.0(1.1)                      Marenzellaria virdis(26.86%)                  9.89(2.46)
Mediomastus spp.(48.9%)                    33.61(12.07)              Mediomastus ambiseta(5.63%)             2.07(0.93)
                                                                                                     Mediomastus californiensis(4.73%)     1.74(0.77)
                                                                                                     Mediomastus spp.(17.31%)                   6.37(1.66)
                                                                                                     Parandalia sp.(3.82%)                              1.41(0.47)
                                                                                                     Streblospio benedicti(21.73%)               8.0(2.92)

Taxa                 1998                          mean(stderr)                    Taxa                 1999                            mean(stderr)
Bivalvia sp.(juv.)(5.07%)                     3.1(1.23)                      Spisula solidissima(3.53%)                  1.84(0.64)
Mulinia lateralis(3.35%)                      2.05(0.87)                     Mediomastus ambiseta (48.58%)       25.32(7.87)
Ostracoda sp.(6.3%)                            3.85(2.44)                     Mediomastus sp.(7.98%)                   4.16(3.48)
Mediomastus ambiseta(11.45%)        7.0(3.11)                     Parandalia sp.A(6.98%)                      3.64(0.86)
Mediomastus spp.(45.38%)                27.75(11.38)                Paraprionospio pinnata(4.53%)           2.36(1.28)
Streblospio benedicti(4.53%)             9.1(2.4)

Taxa                 2000                            mean(stderr)
Mediomastus ambiseta(11.35%)            6.4(2.88)
Mediomastus spp.(49.82%)                   28.10(12.18)
Streblospio benedicti(20.39%)              11.5(2.68)