Collocations for conservation - noun

biodiversity (esp. AmE), energy, environmental, forest, habitat, nature, resource, soil, water, wildlife
a large-scale habitat conservation plan
practices that are good for the community, such as water efficiency and resource conservation

bird, elephant, etc.
species
Through the years they have made significant contributions to species conservation.

architectural, building (BrE)
art

body, group, movement, organization
an avid supporter of the conservation movement

efforts, initiative, measure, policy, programme/program, project, scheme (BrE), strategy, work
the pledge to develop coral reef conservation strategies
long-term forest conservation initiatives

concern, issue, priority
the whole spectrum of conservation concerns

status
Such data can be helpful in evaluating the conservation status of plants.

ethic (AmE)
The commission calls for a bold, new conservation ethic that embraces the oceans as a public trust.

area
a national park and conservation area (AmE)
No new building is permitted in conservation areas. (BrE)

biologist, biology (both esp. AmE)
the history of environmental health and conservation biology