forest margin的用法和樣例：
例句
- In population composition,heliophytes increased and shade-tolerant decreased with forest fragmentation.
種群的變化趨勢是陰濕或喜陰濕的蕨種的種群趨于減少，而林緣和林窗陽(yáng)性或喜陽(yáng)性的蕨種的種群趨于增大。 - Betula ermanii and Alnus mandshurica predominated in the colonizing woody species on forest boundaries.
林緣入侵物種主要由岳樺和東北赤楊組成。
