Nonnative plants rob native species of water, nutrients, space to grow
They not only escape to natural areas but use water, nutrients and space needed by native plant species. Importantly, they do not generally provide food or habitat for native wildlife. And they keep spreading, like the invasive species pampas grass .
also an invasive plant due to the copious number of seeds it produces. In less than 10 years, the weevil has spread from the Mexican border as far north as La Jolla. Dead palms can be seen along freeways and streets. Since the weevil has no natural predators in San Diego, repeated application of systemic chemicals is currently used to treat weevil infestation. The preventative spraying and removal of dead palms are both costly.
Brushfire is another issue made worse by invasives. Grasses brought in for livestock feed escaped and have invaded natural areas. These dry grasses increase the frequency and intensity of fires. They reseed quickly, preventing native plants from establishing in burned areas. With climate changes, wildfires are likely to increase, causing both higher economic and personal costs.
2. After hiking in natural areas, clean your boots and gear to get rid of hitchhiking seeds and pathogens.
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