Diversitas is an international programme on biodiversity

Biodiversity

Biodiversity is the degree of variation of life forms within a given ecosystem, biome, or an entire planet. Biodiversity is a measure of the health of ecosystems. Biodiversity is in part a function of climate. In terrestrial habitats, tropical regions are typically rich whereas polar regions...

 science. It is one of four such programmes that collectively come under the Earth System Science Partnership

Earth System Science Partnership

The Earth System Science Partnership is a partnership under the auspices of the International Council for Science for the integrated study of the Earth System, the ways that it is changing, and the implications for global and regional sustainability...

. Diversitas is trying to promote biodiversity research as basis of sustainability by means of projects, declarations (like the 2007 Buffon Declaration) and international networking.

Its stated mission is to:

promote an integrative biodiversity science, linking biological, ecological and social disciplines in an effort to produce socially relevant new knowledge; and provide the scientific basis for the conservation and sustainable use of biodiversity.

Diversitas was established in 1991, and its founding sponsors were the United Nations Educational, Scientific and Cultural Organization

UNESCO

The United Nations Educational, Scientific and Cultural Organization is a specialized agency of the United Nations...

, the Scientific Committee on Problems of the Environment

Scientific Committee on Problems of the Environment

The Scientific Committee on Problems of the Environment was established by the 10th meeting of the Executive Committee of the ICSU in 1969. SCOPE's members include 38 national science academies and research councils, and 22 international scientific unions.The current president is Lu Yonglong...

 and the International Union of Biological Sciences.