DNA Study Reveals Genetic Split Between North Carolina’s Mountain and Coastal Black Bears

Recent DNA testing of black bears living in North Carolina’s mountain ranges and along its coast has revealed pronounced disparities in genetic health and variability, suggesting the coastal group could be more susceptible to environmental stresses.

Carried out by wildlife biologists together with geneticists, the study collected samples from bears in each habitat and examined genetic‑diversity markers. Bears from the Appalachian highlands possessed a wide array of genetic characteristics, whereas their Atlantic‑coast counterparts exhibited diminished variability, a condition commonly associated with reduced adaptive potential.

Because genetic diversity acts as a shield against disease, habitat alteration and other pressures, the detected fragility in coastal bears may threaten their long‑term survival. Conservation experts point out that isolated or small groups often experience inbreeding, which can lower reproductive rates and raise vulnerability to disease.

These results emerge while North Carolina’s black bear population is broadly viewed as stable, though wildlife managers remain uneasy about habitat fragmentation from development and roadways. By identifying genetic shortcomings, the research offers a scientific foundation for focused actions—like creating habitat corridors or facilitating managed gene flow—to strengthen the coastal bears’ resilience.

State wildlife officials say the findings will guide upcoming monitoring and recovery strategies. As bears continue to move through a human‑altered landscape, preserving genetic health will be crucial to keep both mountain and coastal populations viable for future generations.