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The layer contains point data for the red sesbania (Sesbania punicea) database. The database represents historic and current observations by various individuals of occurrences red sesbania, a non-native invasive plant that currently is invading riparian ecosystems in California. Most occurrences are in the Central Valley, but a few are in the San Francisco Bay area and in a few watersheds to the north. These data were compiled to aid in the eradication and control of the species where it is invasive, as well as to inform the public of its spread. As of February 1, 2006, there were 91 records of point occurrences maintained in an Access database titled SesbaniaData. Each record represents a point where red sesbania occurs.
This layer conatains line data for the red sesbania (Sesbania punicea) database. The database represents historic and current observations by various individuals of occurrences of red sesbania, a non-native invasive plant that currently is invading riparian ecosystems in California. Most occurrences are in the Central Valley, but a few are in the San Francisco Bay area and in a few watersheds to the north. These data were compiled to aid in the eradication and control of the species where it is invasive, as well as to inform the public of its spread. As of February 1, 2006, there were 25 records of linear occurrences maintained in an Access database titled SesbaniaData. Each record represents a line, or linear scattered occurrence of red sesbania.
This layer contains polygon data for the perennial pepperweed (Lepidium latifolium) database. This database represents the areas surveyed throughout the San Francisco Bay, San Pablo Bay and Suisun Bay in California between July, 2004 and June, 2007. Perennial pepperweed is a non-native invasive plant that is currently invading wetland, riparian and cultivated areas throughout California. The area surveyed was identified using aerial images. This data layer is to be used in association with the shapefile, "Perennial Pepperweed Patches - San Francisco Estuary [ds295]" which shows the patches of Lepidium latifolium mapped within the areas surveyed.