The new issue of Environmental Communication includes the special section I edited for them on the Ken Burns series The National Parks. It can be accessed here if you have an institutional subscription. If not, Routledge sometimes makes sample issues available.
My own piece, which kicks off the five-article set, has a few things to say about Burns’s nature as composition, and ecology (and politics and jazz) as improvisation. E-mail me if you’d like a copy of it.