abundance class in a sentence

1. The " abundance class " also becomes unusable for stars with more carbon than oxygen in their atmospheres.
2. These bins are not mutually exclusive : a species with abundance 4, for example, could be considered as lying in the 2-4 abundance class or the 4-8 abundance class.
3. These bins are not mutually exclusive : a species with abundance 4, for example, could be considered as lying in the 2-4 abundance class or the 4-8 abundance class.
4. Species with an abundance of an exact power of 2 ( i . e . 2, 4, 8, 16, etc . ) are conventionally considered as having 50 % membership in the lower abundance class 50 % membership in the upper class.
5. For real datasets, the species abundances are binned into logarithmic categories, usually using base 2, which gives bins of abundance 0-1, abundance 1-2, abundance 2-4, abundance 4-8, etc . Such abundance classes are called " octaves "; early developers of this concept included F . W . Preston and histograms showing number of species as a function of abundance octave are known as Preston diagrams.
6. It's difficult to find abundance class in a sentence.