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Climate Change from an Ecological Perspective Steven T. Rier Dept. of Biology and Allied health Photo by Chris Vogel An ecological perspective? organisms (animals, plants, and microbes) interact in and with the natural world Ecosystem example Sunlight Photosynthesis Cycling of Carbon, Nitrogen, & Phosphorus Humans are a part of ecosystems Functional Ecosystems • Balanced, adaptive, and diverse assemblage of organisms • Often provide functions essential for humans – Detoxify pollutants in water – Lessen the effects of flooding – Pollination of crops Effects of climate change on ecosystems are complex Human Population Industry and transportation Agriculture Land use/ cover changes CO2 Increase Global climate change Loss of ecosystem integrity Other human-caused disturbances •Altered nutrient cycles •Pollution •Spread of exotic species CO2 Increase Global climate change Loss of ecosystem integrity Direct effects of elevated CO2 on Plants Increased production of C-based compounds More carbohydrates More fiber More tannin Less protein Effects of elevated CO2 on ecosystems CO2 Increase Global climate change Loss of ecosystem integrity Global climate change Warming Extreme weather events Loss of ecosystem integrity Drought Human Population Industry and transportation Agriculture Land use/ cover changes CO2 Increase Global climate change Loss of ecosystem integrity Other human-caused disturbances •Altered nutrient cycles •Pollution •Spread of exotic species