Système d'information géographique
Historically, some ecosystems have experienced limited resource extraction and have been able to subsist naturally. Other ecosystems, such as forests, which in many regions provide considerable timber resources, have undergone successful reforestation and consequently, have accommodated the needs of future generations. As human populations grow, introducing new stressors to ecosystems, such as climate change, invasive species, land-use change, and habitat fragmentation, future demand for natural resources is unpredictable. Although ecosystem changes may occur gradually, their cumulative impacts can have negative effects for both humans and wildlife. Geographic information system (GIS) applications and remote sensing can be used to monitor and evaluate natural resources and ecosystem health.