WEEK 12 - ECOLOGY This week's lectures dealt with population and community ecology as well as issues in conservation biology. You should now be able to: 1) Define the different levels of ecological organization. 2) List the different components of ecosystems and their interconnections 3) Describe how communities are described and explain what the different parameters tell us. 4 Explain the importance of historical events in regards to community structure. 5) Explain why realized niches are rarely the same size as (potential) ones. fundamental 6) Explain, with an example, what is meant by competitive exclusion. 7) Explain the difference between direct and indirect effects of and/or parasites on community structure. predators 8) Explain how two critical components define R (replacement rate). 9) Define the four fundamental components in Population Dynamics 10) Describe the scenario that is described by the exponential model: Nt+x = Nt R growth x 11) Explain the logic underlying the logisitc growth model: dN/dt = N R (K-N/K) 12) Explain why habitat fragmentation is a concern to conservation biologists 13) Explain why small populations are under demographic risk. 14) Explain why small populations are under genetic risk 15) Explain the logic underlying the extinction vortex.