Species Diversity and Relationships amongst Interacting Plant Species

Methods: In order to better understand species diversity and relationships amongst potentially interacting species, a study was conducted on 14th October 2014 and 21st October 2014 at the Saywell Woodlot located at York University’s Keele campus (43° 46' 9.228"N, 79° 30' 29.556’’W). Beginning with laying a 100ft transect from the edge of the woodlot (closest to The Pond Rd) at a relatively straight line, to the centre of the woodlot, 25 adult trees were chosen using simple random sampling. Each tree was measured for tree diameter at breast height (ft), plant abundance within a 1.0m radius surrounding the tree, number of unique recognizable taxonomic units (rtus) as well as the type of landscape, canopy coverage and soil pH. To maintain consistency, only deciduous trees located 2-3ft perpendicular to the transect were observed and measured. An adult tree was classified as approximately 12.0ft or taller. This experiment was repeated once more the following week (10/21/14) for a total replication of 50 trees. In order to prevent measuring the same trees, the replication numbers 25-30 were measured from edge of the woodlot closest to Shoreham Dr.

研究方法：为深入阐明潜在互作物种间的物种多样性与种间关联，本研究于2014年10月14日及2014年10月21日，在约克大学基尔校区（York University’s Keele campus）的塞维尔林地（Saywell Woodlot）（地理坐标：43° 46' 9.228"N，79° 30' 29.556’’W）开展。本研究首先从紧邻庞德路（The Pond Rd）的林地边缘出发，沿相对笔直的方向布设一条长100英尺的样带至林地中心；采用简单随机抽样法选取25棵成年树木。对每棵树木测定其胸径（tree diameter at breast height，单位：英尺）、树木周边1.0米半径范围内的植物多度、独特可识别分类单元（unique recognizable taxonomic units，缩写rtus）的数量，以及景观类型、冠层覆盖率与土壤pH值。为保证测量一致性，仅对样带垂直两侧2~3英尺范围内的落叶乔木进行观测与测定。成年树木的判定标准为树高约12.0英尺及以上。本次实验于次周（2014年10月21日）重复开展一次，共计完成50棵树木的取样测定。为避免重复测量同一树木，本次重复实验选取的25~30号树木均从紧邻肖勒姆路（Shoreham Dr）的林地边缘处开展测定。