Weeds, Wildlands and Natural Areas . In other words, weeds can include native and non-native plants alike, growing wherever someone wishes they weren't. Invasive exotic plants of natural ecosystems are often referred to as natural areas weeds. A natural area is generally an area of land or water with predominantly native vegetation or natural geological features that is allowed to respond to the forces of nature with little to no direct human interference. The term wildlands is also used to describe these areas.
Biodiversity is, simply put, all life on earth, even that which has yet to be discovered.
Each year, many thousands of species are being extinguished as a result of human activities, such as habitat destruction and exotic species introductions. The actual number of species in existence is unkown and can only be estimated because we really only know about the species that botanists, entomologists and other scientists have been able to collect, process and identify to date. . The term noxious is a legal designation used specifically for plant species that have been determined to be major pests of agricultural ecosystems and are subject, by law, to certain restrictions. The U.S. Department of Agriculture regulates noxious weeds. For a list of these weeds click here .