The Assessment Of Water Quality And Stream Health

1864 Words Nov 7th, 2016 8 Pages
cology Lab Four:
“The Assessment of Water Quality and Stream Health in Local (Lowell MA) Freshwater Systems via the Analysis of Biotic and Abiotic Indicators”
Overall the objective of this lab exercise was to introduce students to watershed ecology and the ecological factors that affect water quality. Students used biotic (macroinvertebrates ) and abiotic indicators to asses the quality of water in a freshwater body. Specifically students collected water chemistry data (hardness, nitrate/phosphate concentrations, dissolved O2 and pH) to asses the quality of water. Additionally macroinvertebrates from the benthic environment of a respective field site were collected, analyzed as well as catalogued. Collectively the results indicated that a greater species diversity was indicative of greater water quality(Lenat). Likewise within a freshwater ecosystems a negative correlation was found to exist between fluctuating abiotic factors,species diversity and water quality. It can be concluded that amongst the three field sites the ranking of water quality from highest to lowest is as follows; Great Brook Farm, Russell Mill pond, Lawrence Street Stream.
There are two categories for bodies of freshwater, these are lentic and lotic. A lentic body of water in stationary such as a lake or pond and a lotic body of water is flowing such as a river or stream. Lentic or lotic, a productive body of freshwater is a resource that provides water for drinking,agriculture,…
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