Local
San Jose beaver dams raise questions for Guadalupe River salmon habitat
Beavers are building dams on the Guadalupe River as local salmon prepare to spawn. Conservation advocates say the structures can create useful wetlands and shelter for young fish, but excess silt may threaten spawning areas.
Beavers are building dams along San Jose’s Guadalupe River, prompting calls to balance the animals’ habitat benefits with efforts to support local salmon.
The South Bay Clean Creeks Coalition is monitoring the river as salmon approach spawning season. Some beaver dams are partially obstructing waterways, according to the coalition’s account of conditions on the river.
The dams can help salmon by creating wetlands and providing shelter for young fish. But they can also cause silt to build up, potentially affecting places where salmon lay their eggs.
The coalition is asking the Santa Clara Valley Water District to find a way for beavers and salmon to coexist. The challenge is to preserve the ecological benefits of beaver activity while addressing conditions that could harm salmon spawning habitat.