This USGS News Release was put out on August 14, 2015. CORVALLIS, Oregon - The U.S. Geological Survey and Oregon State University released a report this week examining Pacific Northwest tidal wetland vulnerability to sea level rise. Scientists found that, while vulnerability varies from marsh to marsh, most wetlands would likely be resilient to rising sea levels over the next 50-70 years. Beyond that time, however, most wetlands might convert to intertidal mudflats as sea level rise outpaces the capacity of tidal marshes to adapt.