 Climate warming is expected to cause alpine tree liens to advance upwards towards higher altitudes. However, empirical studies have shown mixed results, with some areas showing no significant changes while others exhibiting more advanced tree liens. These differences suggest that different regions may respond differently to climate change. It is still unclear whether or not Himalayan tree liens will shift upwards along the same gradient of response seen in other mountain ranges. This article is authored by Ushikov, M. Babrowski, J. Bonner, and others.