With spring settling in across the U.S. and days lengthening, many people are ready to spend more time outside. But after a walk outdoors, have you ever found seeds clinging to your clothes' Lodged in your socks and shoelaces' Perhaps tangled in your pet's fur' While most of us don't give these hitchhikers much thought, seeds and burrs may be the first signs of invasive plant spread. Certain species of non-native invasive plants produce seeds designed to attach to unsuspecting animals or people. Once affixed, these sticky seeds can be carried long distances before they fall off in new environments. With favorable conditions, they can become established quickly and outcompete native plants. Outdoor recreation has expanded at a record pace across the U.S. in recent years. Overcrowding in outdoor spaces has many harmful effects, from degrading trails to accelerating the introduction and spread of invasive plants. As a recreation ecologist and an avid hiker, I study how people...
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