Abstract
The incorporation of hydrocarbon material into soil causes an increase in microbial oxygen uptake. Competition between micro-organisms and higher plants for available soil nitrogen also occurs. A survey of 15 oil-contaminated sites showed that members of the Leguminosae are abundant in oil-contaminated areas, possibly due to the nitrogen-fixing symbiotic relationship with Rhizobium spp. It is proposed that rehabilitation of oil spill sites includes aeration of soil, addition of nitrogen and seeding with leguminous species in order rapidly to establish a mantle of vegetation.
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