USGS Scientists Find New Invasive Fish Species In Florida Date: July 1, 1998 Source: U.S. Geological Survey Summary: The Asian swamp eel, a non-native fish, has been found in canals, ditches, streams and ponds near Tampa and Miami, Fla. The species is spreading and has the capability of invading and harming freshwater ecosystems throughout the Southeast, including the already-besieged Everglades system. Share:
Nitrogen form Symbol Use in soils and plants Dinitrogen(Atmospheric Nitrogen) N2 Dinitrogen is the most common form. It makes up 78 percent of the atmosphere but cannot be used by plants. It is taken into the soil by bacteria, some algae, lightning, and other means. Nitrate NO3 Nitrate is the form of nitrogen most used by plants for growth and development. Nitrate is the form that can most easily be lost to groundwater. AmmoniumNitrogen NH4 Ammonium taken in by plants is used directly in proteins. This form is not lost as easily from the soil.
Some bacteria in the water change this ammonia to produce nitrite which is then converted by other bacteria to nitrate. Nitrates (NO 3-) are an oxidized form of nitrogen and are formed by combining oxygen and nitrogen. Nitrates also come from the earth. Soil contains organic matter, which contains nitrogen compounds.nimals get nitrogen by eating plants and other animals. Just like animals, plants require nitrogen to grow and survive. But they do not get nitrogen by consuming proteins like animals do. Plants get nitrogen from water and from the soil. They get nitrogen by absorbing it in the form of nitrates and ammonium.