Rooted in history, informed by science and shaped by socio-economic identities, heritage is a field that links nature, culture, administration and communication. UNESCO defines heritage as "our legacy from the past, what we live with today, and what we pass on to future generations" and as "irreplaceable sources of life and inspiration". An understanding of heritage and its management is useful for institutions and individuals who deal with the multi-dimensional challenges of conservation offering novel perspectives and solutions. Natural heritage refers to natural features, geological and physiographical formations and delineated areas that constitute the habitat of threatened species of animals and plants and natural sites of value from the point of view of science, conservation or natural beauty. It includes private and publicly protected natural areas, zoos, aquaria and botanical gardens, natural habitat, marine ecosystems, sanctuaries, reservoirs etc. [UNESCO Institute for Statistics, 2009 UNESCO Framework for Cultural Statistics and UNESCO, Convention Concerning the Protection of the World Cultural and Natural Heritage, 1972.]
Thus, natural heritage applies this concept in its recognition of the intrinsic value of the natural world and its significance to humanity. This may be through:
(i) Nature's cultural/geological/biological significance
(ii) Nature's importance as a scientific resource
(iii) Nature's role in inspiration and recreation
(iv) Nature's critical services such as clean air, drinking water etc.