Above the timber line refers to an elevation above which trees cannot grow due to harsh weather conditions. This regional phenomenon is known as the alpine zone. Synonyms for above the timber line are high alpine zone, subnival zone, mountain heights, timberline, high altitude ecosystem, alpine tundra and high altitude vegetation zone. These synonyms are commonly used to refer to regions where the vegetation is mainly grasses, dwarf scrub, and non-woody plants. The alpine zone is often a harsh environment, characterized by low temperatures, high winds, and limited water availability. Despite these challenges, the region plays a critical role in numerous industries such as tourism, conservation and scientific research.