Description of the variations in time and space, as well as in the size and density of populations, and the factors that cause such variations.

##Atomized branch##

PopulationBiologyAtomized

PopulationBiology element in structured format.

A controlled vocabulary is recommended.

Class: [PopulationBiologyAtomizedClass] (https://github.com/tdwg/PlinianCore/wiki/PopulationBiologyAtomizedClass)

AncillaryData

Ancillary information of the PopulationBiologyAtomized element.

Class: [AncillaryDataClass] (https://github.com/tdwg/PlinianCore/wiki/AncillaryDataClass)

##Unstructured branch##

PopulationBiologyUnstructured

PopulationBiology element in text block format.

Class: [NormalString] (https://github.com/tdwg/PlinianCore/wiki/NormalString)

AncillaryData

Ancillary information of the PopulationBiologyUnstructured element.

Class: [AncillaryDataClass] (https://github.com/tdwg/PlinianCore/wiki/AncillaryDataClass)

Image	Description
	Complex Type
	Sequence structure
	Choice structure
	Obligatory element
	Optional element
	minOccurs=0 maxOccurs=unbounded
	minOccurs=1 maxOccurs=unbounded