Initial Control N addition Na addition PAHs addition
Abundance (number per mesocosm) Abundance (number per mesocosm) Abundance (number per mesocosm) Abundance (number per mesocosm) Abundance (number per mesocosm) Abundance (number per mesocosm)
D 60.60 ± 9.71 3.67 ± 6.35 3.75 ± 4.86 1.25 ± 1.26 2.00 ± 2.16
D+E 10.00 ± 4.69 15.75 ± 8.73 8.00 ± 4.24 14.75 ± 14.08
C 19.60 ± 8.08 0.50 ± 0.58 1.75 ± 2.36 4.00 ± 4.62 1.25 ± 1.50
C+E 3.75 ± 3.20 4.00 ± 0.82 9.50 ± 5.00 4.75 ± 1.26
Biomass (g per mesocosm) Biomass (g per mesocosm) Biomass (g per mesocosm) Biomass (g per mesocosm) Biomass (g per mesocosm) Biomass (g per mesocosm)
D 1.69 ± 0.41 0.04 ± 0.06 0.07 ± 0.05 0.03 ± 0.03 0.04 ± 0.06
D+E 0.50 ± 0.37 0.95 ± 1.02 0.30 ± 0.08 0.97 ± 1.13
C 0.81 ± 0.25 0.01 ± 0.01 0.05 ± 0.06 0.06 ± 0.07 0.04 ± 0.07
C+E 0.08 ± 0.05 0.11 ± 0.03 0.41 ± 0.28 0.12 ± 0.07