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.
The carbon in these mineral deposits remains locked up until it is released to the atmosphere as carbon dioxide when fossil fuels are extracted and burned. Nitrogen Cycle: Organisms require nitrogen in various chemical forms to make proteins and genetically important nucleic acids such as DNA. Klost green plants need nitrogen in the form of nitrate ions (NO,-) and ammonium ions (NH4 +).