St. John River, The Nature Conservancy in Maine, 20th anniversary
Lobster St. John River, The Nature Conservancy in Maine, 20th anniversary © Tristan Spinski

Our People

Mark Berry

Forest Program Director, Maine


  • Areas of Expertise

    Forest conservation, ecology, forest carbon offsets, land management, nonprofit leadership


Mark is the strategic leader for TNC’s Maine forest conservation initiatives. overseeing strategy development and TNC’s ongoing work to permanently conserve forests in Maine.

He helps TNC work with many partners to achieve a sustainable forest economy, forest-based climate change solutions, and biodiversity conservation in Maine, and works closely with TNC’s regional and global teams focused on forest conservation and natural climate solutions.

“Maine benefits greatly from its naturally resilient forests, its long legacy of private land stewardship, and a remarkable series of recent conservation accomplishments. Yet Maine’s forests and rural communities face uncertainty, and pressures that are likely to increase. I feel a sense of urgency to keep our forests well-connected so species can move across our landscape, and it’s essential that Maine’s forests contribute to mitigating the effects of climate change by capturing and storing carbon.”

Mark holds a Master of Science degree in Ecology and Evolutionary Biology from the University of Colorado and a bachelor’s degree in Environmental and Evolutionary Biology from Dartmouth College.

His early career included a variety of research, education, and conservation positions, mostly in the northwest U.S., including management of a conservation area in Oregon for the Confederated Tribes of Warm Springs. Since his return to Maine in 2006, Mark led Downeast Lakes Land Trust, helping them acquire and manage a 55,000-acre community forest, and then led Schoodic Institute at Acadia National Park, connecting science, education, and conservation. 

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Berry M., and H. Meltofte. 2000. “Soft-plumaged petrels Pterodroma mollis and Atlantic petrel Pterodroma incerta at 60°S in the Drake Passage.” Atlantic Seabirds 2:45–46.

Berry, M., and C. Bock. 1998. “Effects of habitat and landscape characteristics on avian breeding distributions in Colorado foothills shrub.” Southwestern Naturalist 43:453–461.

Berry, M., C. Bock, and S. Haire. 1998. “Abundance of diurnal raptors on open space grasslands in an urbanized landscape.” Condor 100:601–608.

Chamas, P. and M. Berry. 2018. “Forest Carbon Offsets.” Conservation Finance Network Toolkit, web publication:

Walsh, J., A. Cruz, M. Berry, J. Chace, and D. Evans. 1998. “Breeding range expansion of the blue-gray

gnatcatcher along the northern Colorado Front Range.” Journal of the Colorado Field Ornithologists 32:166–172.