Animal reintroductions in peopled landscapes: moving towards urban-based species restorations in New Zealand

Abstract

Urban areas are highly modified landscapes that can support significant biodiversity, including threatened species, although native species are usually present at low densities and several native species will be absent. The most powerful tool for increasing urban biodiversity is supporting existing biodiversity through appropriately designed and managed public and private greenspaces, and improving habitat quality. However, if a more proactive strategy is required to overcome recolonisation barriers, then reintroduction is another powerful tool to enhance biodiversity across urban landscapes. The health of cities, in terms of biodiversity, ecosystem services, and the quality of the nature experiences accessed by adults and children largely depends on how much human communities value and know about nature. While community-driven habitat restorations can improve biodiversity and increase human–nature connection, reintroduction of appropriate species could fill ecological gaps that would otherwise remain empty, and further enrich biodiversity in residents’ nearby neighbourhoods. New Zealand is currently a hotspot of reintroduction activity, but these take place in relatively unmodified terrestrial sites, such as national parks, restored offshore islands, and fenced eco-sanctuaries. We review global examples of animal reintroductions taking place within areas modified by human activity, and, using information elicited from 18 experts, consider potential reintroduction candidates, and consider the benefits, opportunities, challenges, and requirements for the reintroduction of native species into New Zealand’s urban areas.