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?
So many California red-legged frogs were caught for consumption in the late 1800's that their numbers declined throughout California. So bullfrogs were imported from the east to help meet the demand. But bullfrogs are voracious predators and helped drive the red-legged frog population lower yet. More...