Is a measure of spatial restriction of phylogenetic diversity. In other words, PE is a relative measure of endemism that represents the degree to which lineages or branches of the tree of life (calculated in my) are restricted spatially.
Phylogenetic diversity (PD) describes the breadth of evolutionary history that is represented among the organisms found in a particular area. It can capture both the diversity of ecological functions that are represented, and perhaps more importantly for human well-being, the evolutionary potential of a community to respond to future stressors.
Although species richness is a commonly used measure of biodiversity, it fails to capture the reality that species without close relatives contribute more uniqueness than do species with many close relatives. Phylogenetic diversity is used as a general te.
Although species richness is a commonly used measure of biodiversity, it fails to capture the reality that species without close relatives contribute more uniqueness than do species with many close relatives. Phylogenetic diversity is used as a general term for a range of measures that consider the total length of all the branches linking a set of species on their phylogeny (“evolutionary tree”) and so reflect species’ evolutionary uniqueness. One of the first such measures is simply the sum of the branch lengths.
The capacity of a single genotype to exhibit a range of phenotypes in response to variation in the environment (Whitman & Agrawal, 2009).
An ability to alter growth form to suit current conditions without genetic change.
A distinct variant of a phenotypic characteristic of an organism; it may be either inherited or determined environmentally, but typically occurs as a combination of the two.
A distinct variant of a phenotypic characteristic of an organism; it may be either inherited or determined environmentally, but typically occurs as a combination of the two (Lawrence, 2005).
The characteristics of an individual resulting from interaction between its genotype (genetic constitution) and its environment (IUCN, 2012a).These characteristics often include behavior, physiology (oxygen consumption, heart rate), life history (e.g. body size, age, offspring number), or morphology (e.g. body proportions).