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.
Mimosa pudica can form root nodules that are habitable by nitrogen-fixing bacteria. The bacteria are able to convert atmospheric nitrogen, which plants cannot use, into a form that plants can use. This trait is common among plants in the Fabaceae family.