Artsrigdom
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Global artsrigdom for pattedyr (2015)
Artsrigdom er antallet af forskellige arter repræsenteret i et økologisk samfund, landskab eller region.[1] Artsrigdom er simpelthen antallet af arter, og den tager ikke højde for arternes overflod eller deres relative forekomst. Artsrigdom betragtes engang synonymt med artsdiversiteten, men den formelle metriske artsdiversitet tager højde for både artsrigdom og evenness (jævnhed).
Antal arter er et simpel udbredt mål for naturarealers biodiversitet. Den mest kendte form for biodiversitet er artsdiversitet eller artsrigdom, altså mangfoldigheden af dyre- og plantearter på et givent område.[2]
Se også
Referencer
- ^ Colwell, Robert K. (2009). "Biodiversity: Concepts, Patterns and Measurement". I Simon A. Levin ((red.)). The Princeton Guide to Ecology. Princeton: Princeton University Press. pp. 257–263.
- ^ Biodiversitet | faktalink hentet 14 august 2020
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Abeille-bee.svg
Forfatter/Opretter: Emmanuel Boutet, Licens: CC BY-SA 2.5
A black bee (Apis mellifera mellifera.
Forfatter/Opretter: Emmanuel Boutet, Licens: CC BY-SA 2.5
A black bee (Apis mellifera mellifera.
Global Mammal Richness Grids, 2015 Release, All Mammals (28871815285).jpg
Forfatter/Opretter: SEDACMaps, Licens: CC BY 2.0
The Global Mammal Richness Grids represent the number of species at a 1-km grid cell resolution. The grid cell values denote the number of species in a particular family or International Union of Conservation Networks (IUCN) Redlist threat category. This map represents the richness grid of All Mammals and is part of the Gridded Species Distribution collection, which consists of the global distribution of amphibians and mammals. Species are grouped by class, family and by three major threat categories: critically endangered, endangered, and vulnerable. See more information at <a href="http://dx.doi.org/10.7927/H4RR1W66" rel="nofollow">dx.doi.org/10.7927/H4RR1W66</a>.
Forfatter/Opretter: SEDACMaps, Licens: CC BY 2.0
The Global Mammal Richness Grids represent the number of species at a 1-km grid cell resolution. The grid cell values denote the number of species in a particular family or International Union of Conservation Networks (IUCN) Redlist threat category. This map represents the richness grid of All Mammals and is part of the Gridded Species Distribution collection, which consists of the global distribution of amphibians and mammals. Species are grouped by class, family and by three major threat categories: critically endangered, endangered, and vulnerable. See more information at <a href="http://dx.doi.org/10.7927/H4RR1W66" rel="nofollow">dx.doi.org/10.7927/H4RR1W66</a>.