Warren artist DM Witman, who teaches at Maine Media Workshops + College in Rockport and Unity College, will present her MELT project Friday, Nov. 6, during the opening day of the Society for Photographic Education’s Northeast Regional Conference at Boston University’s Photographic Resource Center.

The conference’s theme is Advocacy: Photography’s Role in Affecting Change. Witman will present at 3:30 p.m. at BU’s College of General Studies, 871 Commonwealth Ave., preceding the 4:30 p.m. keynote address by Maria Magdalena Campos-Pons of the School of the Museum of Fine Arts, Boston. The conference continues through Saturday, Nov. 7, concluding with the opening reception of the “Evidence and Advocacy: SPE Northeast Juried Exhibition” beginning 6:30 p.m. at the Photographic Resource Center at BU, 832 Comm. Ave.

Witman works in photographic media and maintains an intense studio practice with work deeply rooted in ideas of ephemerality, biology and synergy. For the past 10 years, she has been making photographs without a lens, beginning with pinhole cameras; moving on to experiments with slugs and silver gelatin paper and; her most recent undertaking, to salted paper.

In MELT, Witman virtually traveled around the world, gathering photographs of snow-capped mountains from satellite images; turning them into unmanipulated digital negatives; and printing them as monochrome salted paper prints with rounded corners. The results are on view through Dec. 29 in “A Lensless Vision:  Camera-less works by D.M. Witman” at the Maine Museum of Photographic Arts, located in the University of Southern Maine’s Glickman Library on the Portland campus.

MELT’s three phases of work differ in scale, dissemination, longevity and level of control. The exhibition features one stable and one unfixed version of each image. The latter photographs will gradually change into a solid aubergine color — essentially a time-lapse enactment of global climate change and the melting of ice reservoirs.

Witman was awarded a Kindling Fund grant last winter for an extension of the project-in-progress. It enabled her to print and mail 250 postcard-sized unfixed salt prints to residents of Maine. Recipients are faced with making a conscious decision as to if, and how often, to open the envelope, which contributes to the disappearance of the image — paralleling the daily life choices that contribute to the alteration of global climate.

For more information on the conference, visit spenational.org/regions/northeast. The artist’s website is dmwitman.com.