Your Second Donation Begins the Process of Helping Save Lives! The first donation is used only after a second donation is completed. Only then can we begin to use your plasma to produce life-saving therapies to help treat a variety of diseases and conditions. FDA regulations state that the maximum frequency of donation is once in a two-day period, and no more than twice in a seven-day period. Donating plasma the second time will take much less time out of your day than your first visit to our donation center. We understand that your time is valuable and we strive to make your experience as pleasant and convenient as possible!
The definition for species evenness in my workbook is: Species evenness is a measure of the relative abundance of each species in an area. The more similar the population size of each species, the greater the species evenness.. Could someone clarify this a bit more please, as I don't fully understand the definition.
From Wikipedia, the free encyclopedia. Species evenness refers to how close in numbers each species in an environment is. Mathematically it is defined as a diversity index, a measure of biodiversity which quantifies how equal the community is numerically.