Shooting is not just positive for rural economies, but is also necessary for conservation efforts. In various peripheral rural places in Britain, sport shooting related jobs are a mainstay of local economies, often accounting for as much as a third of the labour market. However, since humans disturbed the ecosystem by eradicating the top predators, destroying habitats and introducing non-native species, we are also now responsible for reducing further damage – conserving – by continuous management. This means shooting overpopulated species to minimise the risks of disease and starvation, and dominant foreign species in order to conserve weaker native ones. Additionally, the management of the environment for the purposes of sport shooting can have very positive conservation effects; for example, many endangered birds of prey now thrive on shooting estates.