Climate change is happening now. This course will focus on how organisms, populations, and biological communities are expected to respond to climate change. While reading the primary literature, we will discuss evidence for effects of climate change on organisms, how to experimentally test for potential effects of climate change, and the ecological and evolutionary mechanisms that organisms have--or do not have--that enable them to respond to climate change. Non-W version of Biology 263. Not available to students who have taken Biology 263. Recommended prerequisite: Bio 202L or Bio 203L.