Data for Woodland survey 2

In the woodlot, the percent coverage of the canopy and distance to nearest sapling was measured for adult elm trees. Elm trees were selected at random from an area of approximately one hectare. A tree was determined to be adult at about three times the height of a human. The distances between saplings and adults were rounded to the nearest tenth of a meter. Canopy coverage was estimated by viewing the sky from the base of the tree through a square formed by my thumbs and index fingers. These two variables were recorded for ten adult elm trees.

本研究在小片林地中，针对成年榆树开展了两项指标的测量：冠层覆盖百分率以及与最近幼树的距离。榆树样本从约1公顷的研究区域内随机选取。当树木高度约为人类身高的三倍时，即判定为成年树。幼树与成年树之间的距离被四舍五入至0.1米。冠层覆盖百分率通过如下方式估算：从树木基部透过由双手拇指与食指围成的正方形区域观测天空。最终为10株成年榆树记录了上述两项变量数据。