Biological diversity, also called "biodiversity", refers to all the species and ecosystems on earth. This diversity forms the biosphere, this tangle of living organisms that makes possible the existence of human beings on earth. This biodiversity generates "ecological services", that is to say the benefits felt by humans, whether it is the purification of air or water, the pollination of cultivated plants, the gathering of wild mushrooms or medicinal plants, or even recreational tourism activities. There are about fifty known ecological services, for which we can estimate their monetary value, which allows us to calculate the value of the natural capital of a natural or semi-natural environment.

Working as an international consultant in biodiversity and ecological services, Benoit Limoges, M. Sc. Biologist supports PurNat by contributing to the ecological planning of activities. Thus, it ensures that the deployment of cleanup operations respects the fauna, flora and ecosystems. Its contribution makes it possible to optimize the positive impacts while minimizing the negative impacts, when there are any. Using its expertise, PurNat can determine the monetary value of the impact of its activities on natural capital. Indeed, an ecosystem free of waste can generate new benefits, thus helping to increase its ecological and monetary value. A recognized speaker, he contributes to the training of the new generation through regular involvement with the University of Montreal and Laval University. In particular, it offers its services through PurNat for a wide range of studies and advice related to the North American environment and sustainable development.