By Chris Mooney and Juliet Eilperin, The Washington Post.

The Environmental Protection Agency has given notice to dozens of scientists that they will not be renewed in their roles in advising the agency, continuing a scientific shake-up that has already triggered resignations and charges from some researchers that the administration is politicizing the agency.

Members of the EPA’s Board of Scientific Counselors (BOSC) whose terms end in August will not see them renewed, according to an email sent to members and obtained by The Washington Post, though they can reapply for their posts. Moreover, five meetings of subcommittees of the board, planned for the late summer and the fall, will now be canceled because of lack of membership. They will be held once the board is reconstituted, according to EPA officials.

“It effectively wipes out the BOSC and leaves it free for a complete reappointment,” said Deborah Swackhamer, the current chair of the board’s executive committee and an emeritus professor of environmental health sciences at the University of Minnesota.

That executive committee has only five remaining members, after a number of members whose terms were up earlier this year were not renewed. The board also has five subcommittees, but according to an email from Swackhamer, “with the latest information from EPA, 38 of the 49 remaining subcommittee members will not be renewed at the end of August.”