1991). For example, the predators of a scorpion in a desert ecosystem might be a golden eagle, an owl, a roadrunner, or a fox. The idea to apply the food chains to ecology and to analyze its ...

and produce food and goods for human use. When evaluating the economic value of these various functions, Costanza et al. (1997) concluded that the economic value provided by wetland ecosystems ...

Wetland biodiversity matters for our health, our food supply, for tourism and for jobs. Wetlands are vital for humans, for other ecosystems and for our climate, providing essential ecosystem ...

Canada is home to an astonishing 25 per cent of the world’s wetlands, yet these diverse and vital ecosystems are ...