Day 3:

Different environmental conditions will be created to see the affects on the specific ecosystems.

___You will be randomly assigned on of 4 possible conditions. Circle the condition that your group was assigned.

Condition #1:  Addition of salt.  This is to recreate how salt used for de-icing affects nearby organisms and in upstate New York, our reservoirs.

Condition #2:  Addition of motor oil.  This is to recreate how oil spills/ illegal dumping in our sewer systems affect aquatic organisms.

Condition #3:  Removal of light by adding sediments to the ecosystem.  This is to recreate how soil erosion leads to the clouding of nearby streams, lakes, and rivers.

Condition #4:  Addition of fertilizer.  This is to recreate how fertilizers leach into ponds and lakes and increase algae blooms.

___Over the next few days you will be responsible for observing the changes taking place in your freshwater ecosystem when the conditions were changed. Record your observations.

__1^st:

__2^nd:

__3^rd: