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.
Nitrates form from the decomposition of nitrogen-rich waste present in soil and water. Plants that come into contact with nitrate-rich soil or water contain varying levels of nitrates. When farmer's add fertilizers with nitrates to crops, some of the nitrates move from the soil into the plants.egetables can contain nitrates, and over 70 percent of the nitrates the average adult consumes comes from nitrates in natural foods, according to the Agency for Toxic Substances and Disease Registry.