BIO101L Lab 6: Comparison of lotic and lentic ecosystems Pre-Lab Activities: Dress warmly; we will be spending much of the lab outside. Define “lotic” & “lentic” How does the environment differ between lotic & lentic ecosystems? Would you expect to find different organisms in lotic & lentic ecosystems? Why? Methods: 1. As a group of 4, develop a hypothesis relating to how the type of aquatic environment might affect the species present. 2. We will visit a lotic and a lentic habitat on the south end of campus. Each group will: Collect a water sample for analysis of water quality Collect a plankton sample for examination of zooplankton & phytoplankton Collect a benthic sample for examination of macroinvertebrates Make a detailed description of the physical habitat in each ecosystem 3. Upon returning to the lab, each group will: Analysize their water quality samples Examine the types of organisms in their plankton samples Examine the types of organisms in their benthic samples Assignment: (due by 5pm on 10/24): TYPED!!! Each group should turn in: 1. A description of the two study sites 2. A description of the types and numbers of organisms found in each sample 3. A paragraph explaining whether your hypothesis was supported.