He said mangrove zones at the southern end of the Firth have been expanding rapidly.
“The [mangrove] expansion in the last few decades has been very unnatural, and that's a response to what we've done in the catchment - land use practices, excess sediments, nutrients, stop banks - all that sort of stuff.
“So, the mangrove zone is expanding on to the mudflats, and with sea level rise gradually occurring on the seaward side, tidal flats will diminish, and the area of foraging available for the birds will diminish as well.”
Mr Woodley said as well as the issues faced here, godwits are also being pushed out of their habitats in East Asia.
“The habitat loss in the East Asian area where they stop, on the coasts of China and Korea, has been colossal in the last few decades,” he said.
“Reclamation for development, industry, building, big aquaculture operations, deep sea ports, oil drilling - there's a lot of activity around the Yellow Sea coast which has impacted on tidal flats.
“We are responsible - us people - we're responsible for almost all of it."