Invasive Species in California Fact Sheet
Weeds of the West is a great resource for learning to idenitfy unwatned plants and weeds that compete with native plants and crops. View a Sample Page.
Invasive Plants located in the Cottonwood Creek Watershed
Invasive plants are those whose presence causes economic, environmental, and/or human health problems. The vast majority of invasive species are non-native; in other words they do not occur naturally in a place, but have been introduced by some means to an area. Since these species are in a new environment, there are few if any natural predators, parasites, or competitors to keep the population in check. Therefore, it is easy for these plants to spread and quickly out-compete native plants, literally covering them and breaking them down or shading them out. Invasive plants often reduce the availability of wildlife food and habitat in the infested areas.
Invasive plants are a particular nuisance in riparian (streamside) areas because they often do not have the root structure necessary to prevent erosion along mountain streams, nor do they provide appropriate leaf/twig material that aquatic insects and fish need. CCWG works to eradicate invasive plant species as part of its restoration program of work.
Invasive plants are a particular nuisance in riparian (streamside) areas because they often do not have the root structure necessary to prevent erosion along mountain streams, nor do they provide appropriate leaf/twig material that aquatic insects and fish need. CCWG works to eradicate invasive plant species as part of its restoration program of work.

