. Ecological study of the Amoco Cadiz oil spill : report of the NOAA-CNEXO Joint Scientific Commission . WWvVA Figure 10. Gas chromotograms of aromatic fraction of light Arabian crude oils and Amoco Cadiz mousse. mousse were observed at either site ifjata not shown). Table 8, shows the effects of mousse additions on [2- C]-acetate oxidation to CO . No' CH, was detected in any of the samples. At the unoiled control site, the addition of 5% mousse decreased the amount of CO produced in 2h by 70% (p = ), while an 86% inhibition was observed with the additions of 25% mousse (p = ). At,the


. Ecological study of the Amoco Cadiz oil spill : report of the NOAA-CNEXO Joint Scientific Commission . WWvVA Figure 10. Gas chromotograms of aromatic fraction of light Arabian crude oils and Amoco Cadiz mousse. mousse were observed at either site ifjata not shown). Table 8, shows the effects of mousse additions on [2- C]-acetate oxidation to CO . No' CH, was detected in any of the samples. At the unoiled control site, the addition of 5% mousse decreased the amount of CO produced in 2h by 70% (p = ), while an 86% inhibition was observed with the additions of 25% mousse (p = ). At,the oiled site at lie Grande, mousse additions appeared to inhibit CO production from [2- C]- acetate although these differences were not significantly different from the control (p ^ ). The effect of fresh and slightly weathered light Arabian crude oil on microbial activities in sediments was also examined because of the probable chemical differences between the highly weathered mousse and the oil which impacted the sites studied. The effect of benzene and toluene was also examined. They are highly volatile aromatic com- pounds with known inhibitory effects (Robertson et al, 1973). Figure 9 shows chromatograms of the saturate fraction of the fresh and weathered light Arabian crude. The fresh oil contained large amounts of low 179


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