You’ll need the following items to complete this lab session. (The standard kit for this book, available from www.thehomescientist.com, includes the items listed in the first group.)
Centrifuge tubes, 50 mL
Fertilizer concentrate A
pH test paper
Yeast, live (baker’s or brewer’s)
Pond sediment/vegetation (from Chapter 7)
Water, spring or boiled tap
Any externally applied change to the environment of a community forces changes to occur within the community until a new equilibrium is reached. For example, after a major ...