Biology 3445F Lecture Notes - Lecture 2: Normal Distribution, Central Tendency, Standard Deviation
Document Summary
Not all species will be observed in a sampling scheme. Species richness counts are highly sensitive to: number of individuals sampled, number, size, and spatial arrangements of samples. Diversity index values have no intrinsic meaning, but can be used to compare across different communities: many assumptions e. g. random sampling. Data: spreadsheets, manipulations, stats packages, basic parametric analyses (single and multiple variables, common non-parametric analyses e. g. ordinations. Regulation of independent variables capacity to manipulate and/or control variables. Matching of sites attempt to minimize inter-site differences accounts for variation. Scope (range of manipulations) (e. g. range of taxonomic groups considered) Realism natural communities, or natural phenomenon/perturbation. Generality whether results apply to many communities. Dichotomy: the influence of a particular variable but at the cost of realism and generality by doing a manipulative lab ex. we gain control and the ability to make definitive statements about. Experimental considerations a good statistical design should be able to satisfy the following criteria:
