FNR 24000 Lecture Notes - Lecture 9: Impervious Surface, Habitat Destruction, Community Structure

• School: Purdue University
• Department: Forestry and Natural Resources
• Course: FNR 24000
• Professor: Wes Flynn

Document Summary

Carbon dioxide, methane, and other gases allow light to pass through to the earth but trap the radiated heat. Called greenhouse gases and lead to a greenhouse effect. This effect is necessary for life on this planet. Human activities have increased the production of greenhouse gases (coal, oil, natural gas, deforestation) O(cid:448)er the past (cid:1005)(cid:1004)(cid:1004) years (cid:449)e ha(cid:448)e see(cid:374) a dra(cid:373)atic cha(cid:374)ge i(cid:374) the earth s cli(cid:373)ate. Climate change is already impacting species across the world. Phenology shifts-frogs call 1-3 weeks earlier, butterflies emerge earlier, birds laying eggs sooner. Range shifts-birds and dragonflies are shifting ranges to higher latitudes. Extinction and extirpation-inability to track changing conditions result in local species loss (butterflies, pika) Species interactions-changes in competitive dominants, shifts in predation and herbivory, increased disease risk (mountain pine beetle and pine blister rust) Habitat loss is the main outcome of urbanization. Species with specialized habitat needs (niches) are lost.