Treeline (noun)

1. The line of trees separating a lower region from an area of tundra or alpine meadow.
2. The upper limit of tree growth in a particular area, often influenced by climate or altitude.

Origin:

Early 20th century: from tree + line.

Examples:

1. The treeline marked the boundary between the forested lowlands and the barren mountain peaks.
2. The treeline was located at an altitude of approximately 3,000 meters.
3. The treeline provided a clear visual indication of the shift in climate and vegetation.
4. The treeline was a popular spot for hikers and mountain climbers, offering a stunning view of the surrounding landscape.
5. The treeline was a dynamic boundary, shifting and advancing over time in response to changing environmental conditions.