Exotic Invasive Plants
There is a silent yet sinister struggle occurring at Point Reyes National Seashore. Native habitats are being significantly altered as invasive, non-native plant species out-compete native plants. As natives are replaced by non-natives, "habitat value" (the ability for an area to support the natural variety of plant and animal species) decreases. Non-native species are one of the most serious threats to the earth's biodiversity. Second only to habitat destruction, they threaten about half of all endangered species (Wilcove 1998)! All it takes is one seemingly harmless seed to disturb natural systems that have been in place for hundreds of thousands of years.
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Did You Know?
40 percent of all debris items picked up during California Coastal Cleanup Days are cigarette butts. In 2008, volunteers picked up over 340,000 of them in only three hours. 2008 was the 24th straight year in which cigarette butts were the most numerous debris item picked up. More...