The disoovery of the Ursilor (Bear\u27s) Cave (Apuseni Mountains, Romania) in the 70th was followed by climatic and biological studies, before its opening as a show cave. Twenty years later these researches were undertaken again The tourism has impacted on the populations of two endemic cave beetles: Pholeuon leptoderum and Drirneotus n. sp. The first one became extremely rare in the tourist part of the cave. Drimeotus has adapted different dynamics during the year in the two parts of the cave; near the tourist path the populations evolves depending on the affluence of the tourists in the summer months, and in the protected part has kept the same pattern as in the early studies
