Species richness — is the number of species in a given area. It is represented in equation form as S.Typically, species richness is used in conservation studies to determine the sensitivity of ecosystems and their resident species. The actual number of species… … Wikipedia
evenness — the distribution of abundance such as biomass or individuals among the species within an assemblage … Dictionary of ichthyology
Rank abundance curve — A rank abundance curve is a chart used by ecologists to display indicators of biodiversity specifically species richness and species evenness. This is achieved using the relative abundances of different species in a sample. Rank abundance curves… … Wikipedia
Shannon index — The Shannon index, also known as the Shannon Weaver Index and sometimes referred to as the Shannon Wiener Index [Krebs, Charles (1989) Ecological Methodology. HarperCollins, New York.] ), H^{prime}, is one of several diversity indices used to… … Wikipedia
Diversity index — A diversity index is a statistic which is intended to measure the local members of a set consisting of various types of objects. Diversity indices can be used in many fields of study to assess the diversity of any population in which each member… … Wikipedia
Measurement of biodiversity — Main article: Biodiversity Polar bears on the sea ice of the Arctic Ocean, near the north pole. A variety of objective measures have been created in order to empirically measure biodiversity. Each measure of biodiversity relates to a particular… … Wikipedia
Artengleichheit — Das Maß der Artengleichheit (engl. evenness) (auch: Spezies respektive Artengleichverteilung) bezieht sich darauf, wie nahe sich in Zahlen Arten in der Umwelt sind. Mathematisch ist dieses als Ungleichheitsmaß definiert, ein Maß der Biodiversität … Deutsch Wikipedia
Niche apportionment models — Mechanistic models for niche apportionment are biological models used to explain relative species abundance distributions. These models describe how species break up resource pool in multi dimensional space, determining the distribution of… … Wikipedia
Pedodiversity — can be generally defined as the variation of soil properties (usually characterised by soil classes) within an area. Pedodiversity studies were first started by analyzing soil series–area relationships (Beckett and Bie, 1978). According to Guo et … Wikipedia
Ecological effects of biodiversity — The diversity of species and genes in ecological communities affects the functioning of these communities. These ecological effects of biodiversity in turn affect both climate change through enhanced greenhouse gases, aerosols and loss of land… … Wikipedia
