Presentation on theme: "Nitrogen and Phosphorus. Nitrogen WHAT is it? Element # 7 in the Periodic Table A colorless gas that makes up 78% of our atmosphere, where it exists as."— Presentation transcript:
Nitrogen WHAT is it? Element # 7 in the Periodic Table A colorless gas that makes up 78% of our atmosphere, where it exists as N 2 N NN
An ingredient in Ammonia (NH 3 ) Nitrogen combines with Hydrogen to make Ammonia An ingredient in Nitrite (NO 2 ) and Nitrate (NO 3 ) Nitrogen combines with Oxygen to make Nitrates H H H N O O O N
Atmospheric nitrogen is converted to ammonia or nitrates as part of the Nitrogen Cycle. Ammonia (NH 3 ) Nitrogen combines with Hydrogen to make Ammonia Nitrates (NO 3 ) Nitrogen combines with Oxygen to make Nitrates NN N fixation Nitrification N fixation
N 2 from the air is converted in 3 ways Atmospheric fixation The enormous energy of lightning breaks nitrogen molecules apart and allows nitrogen atoms to combine with oxygen forming N 2 O. NN
Industrial Fixation Under high pressure and temperature and using a catalyst, atmospheric nitrogen (N 2 ) and hydrogen are combined to form ammonia (NH 3 ), for use as fertilizer.
Biological Fixation (the source of most nitrogen fixation) Highly specialized bacteria live in the roots of legume plants (like peas and beans) or in the soil and have the ability to combine atmospheric nitrogen with hydrogen to make ammonia (NH 3 ).
Nitrogen in Water: Where does it come from? Decomposition Soil erosion Runoff of: Sewage and animal waste Fertilizers Manufacturing waste
Phosphorus WHAT is it? Element # 15 in the Periodic Table A colorless, waxy solid when pure, and highly flammable, it is usually present with oxygen as phosphate ( PO 4 ) and commonly found combined with minerals in rocks P O O O O P
Phosphorus in Water: Where does it come from? Weathering of rocks Soil erosion Runoff of: Sewage and animal waste Fertilizers Manufacturing waste
Why should we care about N and P in our water? Nitrogen and especially phosphorus feed aquatic plants Too many nutrients can lead to excessive plant growth (eutrophication) in streams and lakes. Eutrophication can be natural or human-caused.
Eutrophication can cause Increase of plants floating or in shallow water (potentially affecting recreational activities and water supplies) Increased cloudiness of water Decrease in dissolved oxygen Toxic secretions from some microorganisms Loss of sensitive species such as trout Decreased quality of drinking water (due to changes in color, taste and odor) Increased cost of water treatment
Science is all about solving mysteries. Often it’s like putting together pieces of a puzzle to see the whole picture The data from Morrell Creek can help you solve mysteries related to the health of Morrell and other surface water in our watershed
The puzzle of nutrients in Morrell Cr. How high are they? Are they higher in some places than in others? Where are they coming from? Other questions?
Question/Hypothesis? Dependent Variable(s)? Independent Variable(s)? How to look for patterns? A Natural Experiment