Workers have moved on to the site of a planned supermarket in Shepton Mallet where protesters have climbed trees to try to prevent it being built.
Mr Carter has threatened to stay up the tree for months if necessary
Protester Olly Carter told the BBC that trespass notices had been erected and branches cut on Saturday.
Campaigners are angry that trees will be felled to make way for the store but Tesco has said it will replant more trees than are removed from the site.
Last week, the protesters lost a High Court case to stop the development.
Mr Carter has vowed to carry on the campaign: "We're going to continue fighting the legal angle," he said.
"It would be a shame to have it all built and then pulled down again because of a breach of planning regulations."