Welcome to Southeastern Massachusetts Pine Barrens Alliance (SEMPBA)!

The Southeastern Massachusetts Pine Barrens Alliance (SEMPBA) advocates for the protection, preservation and enlargement of the 40 natural communities that comprise our globally-rare ecoregion, the Massachusetts Coastal Pine Barrens. An all-volunteer non-profit SEMPBA develops educational materials, produces forums, monitors habitat and species and provides speakers to reach its educational goals, working out of our regional conservation center located within Plymouth’s Center Hill Preserve.

SEMPBA has a successful track record of winning local, state and federal grants, but distributes the vast majority of those funds to experts and established conservation entities who share their priorities and focus. SEMPBA’s Conservation Center, which we share with the Indigenous Resource Collaborative, is open to the public and is often the site of conservation workshops, educational trail walks, and ongoing citizen science projects.

SEMPBA is everywhere—doing everything we can to save the Coastal Pine Barrens!

Regional Collaboration


SEMPBA is proud to serve as coordinators for the Massachusetts Coastal Pine Barrens Partnership, one of 55 Regional Conservation Partnerships  (RCPs) in the Northeastern United States. We believe that forming partnerships is the only way we can save the 40 natural communities that comprise this globally rare coastal pine barrens ecoregion.

Link to the Massachusetts Coastal Pine Barrens Partnership website.



Anna posing with some of our pitch pine seedlings to publicize the "Adopt a Pitch Pine" event

SEMPBA volunteers are involved in research projects ranging from saltwater intrusion into Plymouth's ground water, initiatives to engage citizens in regional climate change mitigation and preparation, and a variety of citizen science projects at The Center at the beautiful the Center Hill Preserve. Volunteers participate in the Massachusetts Department of Marine Fisheries Spawning Horseshoe Crab survey each spring. We beleive in fun with a purpose and encourage you to join us!

Find out how you can become involved. Click here.

Education and outreach in a beautiful setting!


SEMPBA offers trainings and workshops to advance conservation within the Coastal Pine Barrens Ecoregion. Our Climate and Nature Center (above), located at the beautiful Center Hill Preserve, boasts at least eight natural communities— from beach to forest and in between—making it a wonderful nature education site. We invite schools, conservation groups, nature lovers and visitors of all types to enjoy the preserve. When you do, stop by SEMPBA's Climate and Nature Center to learn more about our unique ecoregion. What you discover may inspire you—the way it has inspired SEMPBA volunteers—to do all you can to save our Coastal Pine Barrens!

More about The Center at the Center Hill Preserve here.

The SEMPBA office is located at the beautiful Center Hill Preserve
158 Center Hill Road in Plymouth, MA


What's new?


The Horseshoe Crab: Against All Odds

An art exhibition exploring horseshoe crabs

Plymouth Center for the Arts

11 North Street, Plymouth, MA

Exhibition Dates:   June 12, 2024 – July 7, 2024

Entry Deadline: April 15, 2024

More information at www.horseshoecrabs.info

Online Submission Form and upload images here 

Download 'Call for Artists"



Municipal Vulnerability Preparedness:

Subterranean Resilience: Predicting, Assessing and Mitigating Saltwater Intrusion is a first-of-its-kind evaluation of the community’s susceptibility to saltwater intrusion, undertaken by researchers from the UMass-Amherst School of Earth and Sustainability, and a dozen local non-profit environmental and civic organizations who undertook a parallel program to raise awareness of climate resiliency issues regarding water quality. The grant also allowed for the creation of two legacy elements: the establishment of a community water testing station, and the creation of ‘One Water,’ an ongoing digital chronicle of local water-related projects and programs (https://onewater.livingobservatory.org).

Find out more here

Compiled by Irina Kadis and Denise Stowell. Photographs courtesy of Salicicola.org and Alexey Zinovjev & Irina Kadis

Click here to access the plant guide.

This native plant guide was funded in part by a Landscape Scale Restoration grant through the U.S. Department of Agriculture, Forest Service. This institution is an equal opportunity provider.