biogéographie (1) diversité biologique (1) lac (1) écozone (1) Deterioration (1) Treaties (1) Treaties (1) Ecological integrity (1) Biodiversity (1) Zooplankton (1) Winds (1) Watersheds (1) Water (1) Toxins (1) Temperature (1) Salinity (1) Production (Economic theory) (1) Pesticides (1) Necessity (Philosophy) (1) Indigenous peoples (1) Literature (1) Light (1) Lakes (1) Habitat (Ecology) (1) Fresh water (1) Foreign exchange (1) Food--Composition (1) Day (1) Biotic communities (1) Biogeography (1)