The dozens of descendants of enslaved people who form the backbone of the Gullah Geechee community on Sapelo Island, off the coast of Georgia, have fought for years to protect their homes and traditions from the erosion of time and development.

The deadly collapse on Saturday of a dockside gangway not only jolted the community into a deep grief but also brought to the fore longstanding frustrations over the treatment of residents and the state of the island’s infrastructure. Seven people were killed as they waited for a ferry back to the mainland after taking part in an annual cultural celebration on the island.

“We are on Sapelo fighting for our survival,” said Reginald Hall, 59, who was among a group of residents who confronted officials during a weekend news conference to demand answers on the collapse of the dock.

On Monday, state officials said they had removed the gangway as part of an investigation into its “catastrophic structural failure,” but they provided no new details on the cause of the collapse.