Percent light penetration: Soil Heterogeneity and Plant Diversity in an Oak Savanna

This experiment was established in field D in August of 1991. There are 30, 2m x 2m plots. These plots are in prairie openings in unmanipulated natural vegetation. They were placed in a haphazard manner, being about 20m apart within an opening. Each plot was divided into 16, 0.5m x 0.5m subplots. Percent cover estimates of vegetation are done in September for each of the sixteen subplots in each of the 30 plots.

本实验于1991年8月在D地块设立。共设置30个2米×2米的样方（plot），所有样方均布设于未受人为干扰的天然植被覆盖的草原开阔地带内。样方以随机方式布设，同一开阔地带内的样方彼此间距约20米。每个样方均被划分为16个0.5米×0.5米的小样方（subplot）。研究人员于9月对30个样方中每个样方的全部16个小样方逐一开展植被盖度百分比估算工作。