Why do we monitor the marsh?

We monitor the marsh to measure the salinity and temperature to see if the water is good for the alewives. This way we can see if they would come into the marsh and spawn and eventually have more and more alewives. Our middle school science teacher Mrs. England said that we should have alewives coming into the marsh. We would like to see if the salinity and temperature is good for the alewives to mate. The 8th graders of 2018 made a slide for the alewives to help them get into the marsh. Studying the marsh is a project that has go back for many years. Here is a link to some history http://marshwatershed.edublogs.org/