Most people know that chimpanzees, some of the closest living relatives of human beings, are extremely intelligent. It’s less well-known that different communities of chimpanzees have unique cultures ― meaning they exhibit socially learned behavior that get passed from generation to generation.

And new research has found that human activity, including human-induced climate change, may be killing chimp cultures.

“What we mean by ‘culture’ is something you learn socially from your group members that you may not learn if you were born into a different chimpanzee group,” Ammie Kalan, a primatologist involved the study, told The Associated Press.

For example, New Scientist notes there’s one chimp community that uses moss like a sponge to soak up and drink water ― a behavior not seen in other groups.

In a study published Thursday in the journal Science, researchers looked at 31 behavioral traditions among 144 chimpanzee groups across Africa. They found that in areas with heavy human activity like logging or road building, the animals were less likely to exhibit these kinds of behaviors.