Concept 45.1: Climate and Nutrients Affect Ecosystem Function | pol2e_ch45_2.html | 553e911d757a2e1224000000 |
Concept 45.2: Biological, Geological, and Chemical Processes Move Materials through Ecosystems | pol2e_ch45_3.html | 553e911d757a2e1224000000 |
Concept 45.3: Certain Biogeochemical Cycles Are Especially Critical for Ecosystems | pol2e_ch45_4.html | 553e911d757a2e1224000000 |
Concept 45.4: Biogeochemical Cycles Affect Global Climate | pol2e_ch45_5.html | 553e911d757a2e1224000000 |
Concept 45.5: Rapid Climate Change Affects Species and Communities | pol2e_ch45_6.html | 553e911d757a2e1224000000 |
Concept 45.6: Ecological Challenges Can Be Addressed through Science and International Cooperation | pol2e_ch45_7.html | 553e911d757a2e1224000000 |