ENVS 3010 Lecture Notes - Lecture 15: Meta-Analysis, Statistical Power, Ecosystem Services
20 Dec 2017
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Document Summary
Experimental unit: experimental unit at which the independent application of the same treatment occurs. Each unit receives a different treatment (or treatment combinations) or have different ecological conditions for an observational study: plant, co2 chamber, rainout shelter, cage bucket. Number of replicates: the number of experimental units (units of replication) per treatment (or treatment combination). You need to know the unit of replication for an experiment to be able to tell the number of replicates. Sampling unit: the unit where measurements are taken on or observation are made from. Often differs from the experimental unit, but can be the same: the identification of sampling and experimental units are crucial for finding the correct number of replicates, insect, fish, plant. Pseudoreplication: misidentifying the units of replication, assuming that there are more replicates than there actually are, basing your number of replicates on your sample unit instead of the unit of replication, pseudoreplication needs to be avoided.
