The New Zealand Government purchased the lease of St James in 2008 as public conservation land for ecosystem services, public recreation, and biodiversity protection purposes. In this chapter, the ecosystem services and biodiversity provided by St James are reviewed. In the future, climate regulation, erosion control, clean water provision, and recreation services are all likely to increase. Habitat provision, food provision, and biodiversity are likely to be maintained. Water yield is the one service which is likely to decrease. We discuss how an ecosystem services framework can best benefit conservation.