Water & LifeMountain Lake & Stream Ecosystems Frozen Ecosystem AdaptationsDVD - 2011"Water is the essential body ingredient, habitat, and keystone to our quality of life. Most living organisms are composed largely of water, with humans and other mammals being 70% water. Biodiversity is abundant in well-watered habitats, but even water's scarcity in desert biomes reveals important adaptations for reserving enough liquid for life to thrive. With water posed to become an even more important resource than oil, this series examines the biodiversity that thrives in water ecosystems." -- Container.