The Madrona Marsh Preserve has been designated as a Significant Ecological Area by Los Angeles County, which means it contains irreplaceable biological resources.
101 species in the Madrona Marsh Preserve are Special Status, that is, native species that have been accorded special legal or management protection because of their continued existence is in question. There are several categories of protection at federal and state levels, depending upon the magnitude of threat and knowledge of existing population sizes. Several plant and animal species are in decline locally and are categorized as “species of local significance.” Some of these species inhabit the Preserve year-round, while others temporarily stop during migration.
Local plant and wildlife biologists and naturalists who assisted in compiling the species of local significance list include Jeannie Bellamin of El Camino Community College, Dr. Connie Vadheim of California State University, Dominguez Hills, Jess Morton of Palos Verdes / South Bay Audubon Society, David Moody of Friends of Madrona Marsh and Bob Shanman, Co-President of Palos Verdes / South Bay Audubon Society.