Ecology2050 Grassland Dataset #1

Hypothesis: It is predicted that the more abundance of species in a square-meter area, the less rich that area will be, due to it being a hotspot for certain species of plants to thrive and outcompete other plant species.
Predictions: The higher the number of individual plants in a square-meter area, the less rich in plant species that area will be. The more abundant a species is, the higher the % of the area it will cover, and the less grass will be present.   
A one meter-square quadrat was laid down on a grassland. An estimate by eye and calculations of the number of individual plants, the number of different species of plants, the % of plant cover, and the % of grass cover were each taken in that square-meter area.
The data was collected in the Danby Grassland, an open field, on a sunny late afternoon with a light breeze. There were no roads in the immediate area and was located next to a woodlot.

假说：据推测，一平方米区域内的植物物种丰度越高，该区域的物种丰富度反而越低，原因是该区域会成为特定植物物种繁盛并排挤其他植物物种的热点区域。
预测结果：一平方米区域内的单株植物数量越多，该区域的植物物种丰富度越低。某一物种的丰度越高，其占据的区域百分比也就越高，同时区域内的草本植物占比则越低。
研究人员在一片草地上布设了一个1平方米的样方（quadrat），并在该区域内通过目视估算与计算，分别统计了单株植物数量、植物物种种类数、植物总盖度百分比以及草本植物盖度百分比。
数据采集于丹比草地（Danby Grassland）——一片开阔田野，采集时间为晴朗的傍晚时分，当时有微风。该区域紧邻一片小片林地，附近并无道路。