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WASHINGTON — The majority of members of the National Parks System Advisory Board, which advises the federal government on management of the country’s national parks, have jointly resigned to protest Trump administration policies that the board members say have ignored science, squelched efforts to address climate change and undermined environmental protections.

The advisory board was established in 1935 to advise the secretary of the interior, who oversees management of the country’s national parks and monuments. Since taking office last year, Interior Secretary Ryan Zinke has come under criticism from environmental advocates for promoting President Trump’s agenda of opening up the nation’s public lands and waters to fossil-fuel exploration, and for reducing the protection of public monuments.