This week, February 23–27, invasive species experts are gathering in Washington, D.C., and pulling in advocates from across North America virtually, all for one reason: because the plants, animals, and organisms quietly dismantling our ecosystems can't be ignored anymore.

National Invasive Species Awareness Week (NISAW) is, at its core, about stopping the spread before the spread stops us. And when it comes to our waterways, that urgency is real.

Lake Tahoe’s clarity and ecosystem are threatened by invasive species like zebra, quagga, and golden mussels—and invasive aquatic plants such as Eurasian water milfoil and curlyleaf pondweed. These invaders outcompete native species, harm water quality, and damage boat motors, pipes, and infrastructure. Once established, they’re nearly impossible to eradicate and cost millions annually to manage.

In October 2024, the golden mussel—a species never before seen in North America—was discovered in California’s Sacramento–San Joaquin Delta. It poses a grave risk to Tahoe if introduced. Because of these concerns, Lake Tahoe has implemented a boat inspection program to help limit the spread!