The Fleet and much of Chesil Beach are privately-owned and managed as a nature reserve. The shingle beach and its plant communities may be sensitive to changes in natural coastal processes, e.g. through sea defences. The main concern for the Fleet is water quality; blooms of blue green algae occur, and this is being investigated by the Environment Agency. The site is close to one of the world's busiest shipping lanes and consequently there is a risk of accidental oil pollution, to which the communities would be particularly sensitive. Licence has been given for offshore oil exploration nearby; this is carried out under strict guidelines that take account of nature conservation interests. Recreational pressure on the Fleet is small and locally there is cultivation of shellfish. These activities are not thought to be serious concerns provided they remain at their present scale.