An invasive species had taken over ecosystems across the West Coast and was threatening to dominate another one in Monterey County, California, when ecologist Rikke Jeppesen began her research two ...

For years, Rikke Jeppesen has been setting traps in the slough's delicate ecosystem, trying to catch green crabs. "Green crabs wreak havoc on native ecosystems. So once green crabs showed up on ...