For the sake of this discussion, it is obvious that agricultural-derived pollution (mostly due to livestock), as measured at point 2, is limited and has a minimal impact (except for the ammoniumion). This is not the case for pollution of human origin (point 3), which has a significant impact on the pH, the quantity of dissolved ions, the quantity of nitrite ions, <a href="https://www.studyproessay.com/">custom nursing paper writing help USA</a> the quantity of nitrate ions, and the quantity of phosphate ions, resulting in a significant decrease in the dissolved oxygen content, making aquatic life difficult. Furthermore, at point 2, it is still possible to see gammarids (Gammarus pulex, L., 1758) and odonatelarvae, including Damselies (Zygoptera, Selys, 1854), although this is no longer the case at point 1. Assignment.