Moss Growth in Alameda Creek Raises Ecological Concerns
A recent photo shows extensive growth of green moss in Alameda Creek, suggesting potential ecological changes in the local waterway. The proliferation has raised concerns about the possible impact on the creek's wildlife and water quality. Further investigation may be needed to determine the causes and consequences of the altered ecosystem.
- Alameda Creek is the largest local tributary to the San Francisco Bay and is a critical habitat for one of the few remaining native steelhead trout populations in the East Bay. - The creek's water quality is impacted by various sources of pollution, including urban and agricultural runoff containing pesticides, fertilizers, and animal waste, as well as discharges from industrial and commercial sites. - Excessive nutrients like nitrogen and phosphorus in the water, often from runoff, can lead to eutrophication—the rapid growth of algae or "moss"—which can deplete dissolved oxygen and harm aquatic organisms. - In March 2021, the Mission Valley Rock Company was responsible for discharging 41,000 gallons of untreated wastewater into the creek, which clouded the water and deposited sediment on the creek bed. - Numerous restoration projects are underway in the Alameda Creek watershed, focused on removing barriers to fish migration, restoring natural creek conditions, and improving wildlife habitat. - The Alameda Creek Fisheries Restoration Workgroup, a coalition of 15 public agencies and environmental groups, was formed in 1999 to address the restoration of the creek's fisheries. - Historically, 95 percent of the native riparian vegetation along the 12-mile flood control channel of Alameda Creek has been destroyed, significantly impacting the local ecosystem. - A major restoration project completed in 2022 involved constructing fish ladders at the BART weir and inflatable dams in Fremont, making them passable for migrating salmonids for the first time in decades.
