树木线 meaning in English

forest line
timber line
tree line

So far as the north demarcation line of the forest zone is called the forest line , the north demarcation line of the forest - steppe zone should be called the tree line
相对于森林地带北界森林线，森林草原地带北界应为树木线。
Within the northwest territories , lynx are found below the treeline and are most numerous in the southwest and in the mackenzie delta
西北部的猞猁生活在树木线以下，而西南部的猞猁数量最多，此外，加拿大的马更些三角洲也有猞猁出没。