A rare species is an organism which is very uncommon or scarce. This designation may be applied to either a plant or animal taxon, and may be distinct from the term "endangered" or "threatened species". An endangered species is a population of an organism which is at risk of becoming Extinct because it is either few in numbers or threatened by changing environmental or predation Threatened species are any species (including Animals Plants fungi, etc Designation of a rare species may be made by an official body such as a national government, state or province. However, the term is used more commonly without reference to a specific criteria. The IUCN does not normally make such designations but may use the term in its scientific discussions. [1]
The concept of rarity is established from having a very small number of organisms worldwide, usually a number less than 10,000; however, the concept is also influenced by having a very narrow endemic range and/or fragmented habitat. Endemism is the Ecological state of being unique to a place Endemic species are not naturally found elsewhere Habitat fragmentation is a process of environmental change important in Evolution and Conservation biology. [2]
A species may be endangered or vulnerable, but not considered rare if, for example, it has a large, dispersed population but its numbers are declining rapidly or predicted to so. Rare species are generally considered threatened simply because the inability of small population sizes to recover from stochastic events, and the potential for a rapid decline in population. Populations with small population size behave differently to larger populations
Examples of rare species
- Acarospora admissa, lichen
- Baker's larkspur
- Giant Panda, mammal
- Golden lion tamarin, mammal
- Hickman's potentilla, wildflower
- Mason's Lilaeopsis
- Red Panda, mammal
- San Bruno elfin butterfly
- San Francisco garter snake
- Showy Indian clover, trifolium amoenum
- Soft bird's beak, plant
- Spring vetchling, Lathyrus sphaericus, endemic to Kullaberg Nature Preserve and one other location in Sweden. Lichens (ˈlaɪkən or /lɪtʃən/ are symbiotic associations of a Fungus (the mycobiont with a photosynthetic partner (the photobiont also known as Baker's larkspur ( Delphinium bakeri) is a perennial Herb in the buttercup family (Ranunculaceae The Giant Panda ( Ailuropoda melanoleuca, "black-and-white cat-foot" is a Mammal classified in the Bear family ( Ursidae) native to The Golden Lion Tamarin ( Leontopithecus rosalia, Portuguese Mico-leão Dourado) also known as Golden Marmoset, is a small New World monkey Hickman's potentilla ( Potentilla hickmanii) is an endangered perennial Herb of the rose family The Red Panda, Firefox, Fire Cat, or Lesser Panda, "or Ailurus fulgens ("shining cat" is a mostly herbivorous Mammal The San Bruno elfin butterfly ( Callophrys mossii bayensis or Incisalia mossii bayensis) is a U ( Thamnophis sirtalis tetrataenia) is a slender multi-colored Colubrid Snake. Trifolium amoenum, known by the common name Showy Indian clover is an Endangered annual Herb that subsists in grassland areas of the Trifolium amoenum, known by the common name Showy Indian clover is an Endangered annual Herb that subsists in grassland areas of the Kullaberg is a Nature reserve situated on a Peninsula of land protruding into the Kattegat in Höganäs Municipality near the town of
- Weeping elm, tree
- Snow leopard, mammal
See also
References
- ^ Categories & Criteria (version 3.1) IUCN, 2001.
- ^ R. The Camperdown Elm Ulmus glabra ' Camperdownii' is a Cultivar which cannot reproduce from seed The snow leopard ( Uncia uncia) sometimes known as the ounce, is a large cat native to the mountain ranges of Central Asia from Afghanistan Northern This article is about a conservation biology topic For other uses of BAP see BAP (disambiguation. In Population dynamics, depensation is the effect on a Population (or stock) whereby due to certain causes a decrease in the breeding population (mature Recovery Plan is a program in the USA to develop protocols for protecting and enhancing rare and Endangered species populations Common species and uncommon species are designations used in Ecology to describe the population status of a species Abundance is an ecological concept referring to the relative representation of a species in a particular Ecosystem. MacNally and G. W. Brown, Reptiles and Habitat Fragmentation in the Box-ironbush Forests of Central Victoria, Australia: Predicting Compositional Change and Faunal Nested-ness, Oecologia 128:116-125 (2001)
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