Other uses Biological classification In biology , a species is one of the basic units of biological classification and a taxonomic rank . A species is often defined as a group of organisms capable of interbreeding .... Presence of specific locally adapted traits may further subdivide species into subspecies . The commonly used names for plant and animal taxa sometimes correspond to species for example, lion , walrus , and Camphor tree each refers to a species. In other cases common names do not for example, deer refers to a Family biology family of 34 species, including Eld s Deer , Red Deer and Elk Wapiti . The last two species were once considered a single species, illustrating how species boundaries may change with increased scientific knowledge. Species that are believed to have the same ancestors are grouped together, and this group is called a genus . A species can only belong to one genus that it was grouped ..., other similar properties are used. For plants similarities of flowers are used. All species are given ... part of a binomial name is the name of a biological genus generic name , the genus of the species ... is commonly called by its bionomial name, and is one of five species of the Boa genus. The first ... in italics. A usable definition of the word species and reliable methods of identifying particular species are essential for stating and testing biological theories and for measuring biodiversity . Traditionally, multiple examples of a proposed species must be studied for unifying characters before it can be regarded as a species. Extinct species known only from fossils are generally difficult to assign ... numbers of different species in the world, it is estimated that there are anywhere between 2 and 100 million different species. ref name SciDaily Cite web date 2003 05 26 title Just How Many Species ... 01 15 postscript None ref Biologists working definition A usable definition of the word species and reliable methods of identifying particular species is essential for stating and testing biological ... more details
In Species II a professor named Herman Cromwell, played by Peter Boyle , claims that the original species originated in the Large Magellanic Cloud called the Magellanic Galaxy The only other place ..., in case something from another planet came to visit so that their species could continue to infect other planets in a similar manner. Mankind s first interaction with this particular species occurred ... under the nickname Sil . Physical appearance and growth The Species appear to be sexually dimorphic ... bipedal humanoid forms and appear to be much more agile. Both genders of the Species have skeletal ... their heads which can be used to kill. However, it is unknown whether the Species is patriarchal ... in the movies. Most of the members of the Species seen are actually mutations from humans, but a pure .... In the film novelization of Species , the pure creature was actually a hybrid between the alien ... induced by the species was that of Sil . Sil grew into a visible fetus in a single day and then into a young ... of technological achievement The Species are currently at, however their mentioned mastery of black ..., the Species have not been shown to have space travel capabilities, however in a rejected Species .... In the movie novelization of Species II , the Species had once established a colony on Mars and consumed ... of Spaceflight space travel . However, a character speculates that the Species .... Species Films DEFAULTSORT Species Alien Species Category Species films Category Fictional life forms ... more details
Dominant species may mean Dominant species ecology , one of a small number of species which dominate in an ecological community Dominant Species novel Dominant Species novel by Michael E. Marks Dominant Species video game Dominant Species video game Dominant Species album Dominant Species album , an album by New Zealand singer King Kapisi Disambig ... more details
Wiktionary speciesSpecies is one of the basic units of biological classification. Species may also refer to Chemical species , a common name for atoms, molecules, molecular fragments, ions, etc. Species problem , a mixture of difficult, related questions that often come up when biologists identify species Combinatorial species , an abstract, systematic method for analysing discrete structures in terms of generating functions Counterpoint Species counterpoint Species counterpoint , a relationship between two or more voices in music Species film , a science fiction horror film Species II , the sequel Species III , a direct to video sequel Species The Awakening Species The Awakening , another direct to video sequel Species , the forms bread and wine of the Eucharist , especially in discussion of transubstantiation See also Specie disambiguation , an unrelated term used to refer to coins disambig cs Druh de Species es Especie desambiguaci n it Species hu Faj egy rtelm s t lap nl Species pt Esp cie desambigua o ro Specie dezambiguizare sk Druh sr fi Species sv Species ... more details
The Female of the Species may refer to The Female of the Species Kipling poem , first published in 1911 The Female of the Species play , a comic play written by Joanna Murray Smith and produced in the West End, London, in 2008 Female of the Species , a 1996 song by Space English band The Female of the Species Tales of Mystery and Suspense , an anthology edited by Joyce Carol Oates Female of the Species & Female of the Species Vol2, A 2cd compilation series from Law & Auder Records featuring female electronic musicians from around the world Disambig ... more details
Wildlife species may refer to A taxonomic species found in the wild Evolutionary Significant Unit , a grouping used in conservation which may refer to species, subspecies, or other groups disambig ... more details
Unreferenced date December 2009 File Kelp forest.jpg thumb Californian kelp forest In ecology , a foundation species is a dominant primary producer in an ecosystem both in terms of abundance and influence. Examples include kelp in kelp forest s and coral s in coral reef s. Keystone species are the engineers of an ecosystem. Ex beavers. See also Keystone species Indicator species Flagship species clear modelling ecosystems DEFAULTSORT Foundation Species Category Ecology Ecology stub ... more details
In wildlife conservation , Species of Concern is an informal term, not defined in the federal Endangered Species Act . The term commonly refers to species that are declining or appear to be in need of concentrated conservation actions. Many agencies and organizations maintain lists of these at risk species. External links http www.nmfs.noaa.gov pr species concern The National Marine Fisheries Species of Concern page Category Conservation in the United States Category United States federal environmental legislation Category United States Fish and Wildlife Service ... more details
Cleanup date April 2010 An Adventive species is one that has arrived in the geographical area specified from somewhere else by any means i.e. through imported plants , but is not self sustaining and whose numbers are only increased through non reproductive means, unlike a Naturalisation biology naturalised species . See also Naturalisation biology Introduced species Invasive species Weed DEFAULTSORT Adventive Species Category Introduced species Category Ecological processes Category Environmental issues with conservation Category Habitat ecology terminology Ecology stub ... more details
Wikify date December 2010 A Species affinis Affinis , abbreviations sp. aff. , Aff. , or Affin. is a species related to but not identical with the named species. ref cite web url http www.cactus art.biz note book Dictionary Dictionary S dictionary species affinis.htm title Species affinis Affinis work Dictionary of botanic terminology publisher cactus art.biz accessdate 2010 12 13 ref Reference reflist DEFAULTSORT Species Affinis Category Taxonomy Biology stub ... more details
Unreferenced date January 2009 Image JCBCP logo.png thumb Project logo showing the use of the Zanzibar Red Colobus as the flagship species for conservation in Zanzibar A flagship species is a species chosen to represent an environmentalism environmental cause, such as an ecosystem in need of conservation biology conservation . These species are chosen for their endangered species vulnerability , attractiveness or distinctiveness in order to engender support and acknowledgment from the public at large. Thus, the concept of a flagship species holds that by giving publicity to a few key species, the support given to those species will successfully leverage conservation of entire ecosystems and all species contained therein. Examples of flagship species include the Asiatic lion and the Bengal tiger of India, the giant panda of China , the golden lion tamarin of Brazil, the African elephant , the mountain gorilla of central Africa , and the orangutan of southeast Asia . See also Keystone species Indicator species Foundation species Charismatic megafauna Umbrella species References Principles of Environmental Science , By Cunninghan and Cunningham 2009, McGraw Hill modelling ecosystems expanded other Category Conservation ko it Specie bandiera fi Lippulaivalaji ... more details
Unreferenced date November 2008 Species sorting , also known as units of selection species selection , is a theory which states that evolution can proceed by the natural selection of traits found at the species level rather than the organismal or genetic level, for example traits such as population size and population structure are properties of populations. This is not to be confused with Georgy Gause Gause s competitive exclusion principle which states that each species will eventually have its own ecological niche as two species cannot occupy the same niche for an unlimited amount of time without extinction. One will be more competitive than the other species. Therefore, if two species with the same niche were left in the same area, eventually one of the species would evolve and participate in Niche differentiation resource partitioning . References Jablonski, D. 2008. Species selection theory and data. Annual Review of Ecology, evolution and systematics 39 501 524 Category Evolutionary biology Biology stub ... more details
A species complex is a group of closely related species, where the exact demarcation between species is often unclear or cryptic owing to their recent and usually still incomplete reproductive isolation . Ring species , superspecies and cryptic species complex are example of species complex. Such groups of species with complex relationship between species may occur in a line undergoing rapid speciation or where such speciaton recently have occurred, so that species separation mechanisms has yet to be fully developed. In such cases speciation may leave some species paraphyletic at the species level. Species complexes are more common among plants , but animal examples exist, such as the dog wolf coyote complex the genus Canis and the cobras genus Naja . Often such complexes only become evident when a new species is introduced into the system, breaking down existing species barriers. An example is the introduction of Spanish slug in Northern Europe , where interbreeding with the local black slug and red slug , traditionally considered clearly separate species that did not interbreed, shows these may actually be subspecies of the same species. ref da icon Engelke, S. 2006? Til Snegleforeningen Note to the Danish Slug society . http www.dansksnegleforening.dk Af 20Sabine 20Engelke.htm Article in Danish ref Examples of known species complexes Animals The wolf dog coyote dingo group, genus Canis The cobras, genus Naja Some species of the roundback slugs, genus Arion gastropod Arion The jellyfish genus Cyanea jellyfish Cyanea , with from 1 to 14 species, depending on author. References reflist speciation Category Speciation Category Evolutionary biology no Artskompleks ... more details
Sibling Species are species very similar in appearance, behavior and other characteristics while they are Reproductive isolation reproductively isolated . See also Sympatric speciation Category Evolutionary biology Category Population genetics Category Speciation de Zwillingsart es Especies gemelas it Sibling species ru stq Twillingstaxa ... more details
Unreferenced stub auto yes date December 2009 In evolutionary biology , a species flock is a diverse group of closely related species in an isolated area. A species flock may arise when a species penetrates a new geographical area and diversifies to occupy a variety of ecological niche s this process is known as adaptive radiation . The first species flock to be recognized as such was the 13 species of Darwin s finches on the Gal pagos Islands described by Charles Darwin . A species flock may also arise when a species acquires an adaptation that allows it to exploit a new ecological niche. For example, the Notothenioidei Antarctic notothenioid fishes are a species flock of 122 marine fishes that have an adaptation that allows them to survive in the freezing, ice laden waters of the Southern Ocean because of the presence of an antifreeze glycoprotein in their blood and body fluids. The cichlid s are a group of perciform fishes that contains a number of species flocks found in the lakes and rivers of central and southern Africa. DEFAULTSORT Species Flock Category Evolutionary biology Evolution stub de Artenschwarm ... more details
About an ecological term Common disambiguation Definitions Common species and uncommon species are designations used in ecology to describe the population status of a species. Commonness is closely related to abundance ecology abundance . Abundance refers to the frequency with which a species is found in controlled samples in contrast, species are defined as common or uncommon based on their overall presence in the environment. A species may be locally abundant without being common. However, common and uncommon are also sometimes used to describe levels of abundance, with a common species being less abundant than an abundant species, while an uncommon species is more abundant than a rare species. ref cite web url http www.npwrc.usgs.gov resource birds stcroix methods.htm work Birds of the St. Croix River Valley Minnesota and Wisconsin title Methods, Terminology, and Nomenclature author Northern Prairie Wildlife Research Center accessdate 2006 12 31 year 2006 ref Common species and conservation Common species are frequently regarded as being at low risk of extinction simply because they exist in large numbers, and hence their conservation status is often overlooked. While this is broadly logical, there are several cases of once common species being driven to extinction such as the Passenger Pigeon and the Rocky Mountain locust , which numbered in the billions and trillions respectively before their demise. Moreover, a small proportional decline in a common species results in the loss of a large number of individuals, and the contribution to ecosystem function that those individuals represented. A recent paper argued that because common species shape ecosystems, contribute disproportionately to ecosystem functioning, and can show rapid population declines, conservation should look more closely at how the trade off between species extinctions and the depletion of populations ... DOI 10.1016 j.tree.2007.11.001 ref . Notes references See also Rare species Abundance ecology Category ... more details
This page features extinct species , organisms that have become Extinction extinct . List of extinct animals List of extinct plants disambig ... more details
Conservation status A Vulnerable species is one which has been categorised by the International Union for Conservation of Nature IUCN as likely to become Endangered species Endangered unless the circumstances threatening its survival and reproduction improve. Vulnerability is mainly caused by habitat loss or destruction. Vulnerable species are monitored and are becoming threatened. However, some species listed as vulnerable may in fact be quite abundant in captivity, an example being the Venus Flytrap . fact date December 2010 See also IUCN Red List vulnerable species for a list ordered by taxonomic rank Category IUCN Red List vulnerable species for an alphabetical list External links http www.iucnredlist.org apps redlist search link 4cb7f72f 7bdda90f List of Vulnerable species as identified by the IUCN Red List of Threatened Species Category Vulnerable species Category Biota by conservation status Category IUCN Red List Category Environmental issues with conservation ar cs Zraniteln el es Especie vulnerable fr Esp ce vuln rable hi id Spesies rentan hu Sebezhet faj mr ja simple Vulnerable species sl Ranljiva vrsta fi Vaarantunut laji sv S rbar ta tr Hassas t rler uk zh ... more details
Expert subject Ecology date February 2009 Species richness is the number of different species in a given area. It is represented in equation form as math S math . Species richness is the fundamental unit in which to assess the Species homogeneity homogeneity of an environment. Typically, species richness ... and their resident species. The actual number of species calculated alone is largely an arbitrary number. These studies, therefore, often develop a rubric or measure for valuing the species richness number s or adopt one from previous studies on similar ecosystems. Factors affecting species richness There is a strong inverse correlation in many groups between species richness and latitude the farther from the equator , the fewer species can be found, even when compensating for the reduced surface ..., species richness decreases, indicating an effect of area, available energy, isolation and or zonation intermediate elevations can receive species from higher and lower . Latitude Latitudinal gradient See also Rapoport s rule and Latitudinal gradients in species diversity Species richness increases from high latitudes to low latitudes. The peak of the species richness is not at Equator . It is deduced ... north and south and this attests to the fact that species richness and biodiversity is highest here. Fact date September 2007 The gradient of species richness is asymmetrical about the equator. The level of species richness increase rapidly from the north region but decrease slowly from the equator to southern region. Area effect The latitudinal gradients of the species richness may result from ... to higher species richness at lower latitudes than normal. Productivity The latitudinal gradients of species ..., minerals and water as a result, even higher levels of species richness can be allowed at lower latitudes. However, there have been relevant studies showing that species richness and Productivity ecology ... blockquote In most ecosystems, changes in the number of species are the consequences of changes in major ... more details
Climax species , also called late Sere ecology seral , late successional , K selected or equilibrium species, are plant species that will remain essentially unchanged in terms of species composition for as long as a site remains undisturbed. They are the most Shade tolerance shade tolerant species of tree to establish in the process of Ecological succession forest succession . The seedling s of climax species can grow in the shade of the parent trees, ensuring their dominance indefinitely. A Disturbance ecology disturbance such as fire may kill the climax species, allowing pioneer species pioneer or earlier successional species to re establish for a time. They are the opposite of pioneer species , also known as ruderal species ruderal , fugitive, opportunistic or R selected species, in the sense that climax species are good competitors but poor colonizers, whereas pioneer species are good colonizers but poor competitors. Climax species dominate the climax community , when the pace of succession ... of opportunistic species. Through negative feedback , they adapt themselves to specific environmental conditions. Climax species, closely controlled by carrying capacity , follow K strategy K strategies , wherein species produce fewer numbers of potential offspring, but invest more heavily in securing ... niche . Climax species might be Semelparity and Iteroparity iteroparous , Efficient energy use ... mcshaffd eco sym 4SPEC98.html Relationships Among Species ref Disputed Term The idea of a climax species ... regime. But the idea of a dominant species is still widely used in Silviculture silvicultural programs .... Examples Picea glauca White spruce Picea glauca is an example of a climax species in the northern ... Reviews . Swaine, M. D. and T. C. Whitmore. On the definition of ecological species groups in tropical ... Springer . Buchanan, J. Robert. Turing instability in pioneer climax species interactions . October 2004. http dx.doi.org 10.1016 j.mbs.2004.10.010 Science Direct . DEFAULTSORT Climax Species Category ... more details
A species group is an informal taxonomic rank into which an assemblage of closely related species within ... ref ref name oxford http www.encyclopedia.com doc 1O8 speciesgroup.html Michael Allaby. species group ... etd 10272008 31295014212541 Molecular systematics of the Peromyscus boylii species group ref Use The use ... sufficient differentiation to be recognized as separate species but possess inadequate variation to be recognized as subgenera . Defining species groups is a convenient way of subdividing well defined genera with a large number of recognized species. The use of species groups have enabled systematists to consolidate polytypic polytypic speciesspecies into Biological classification nominal species which in turn can be grouped into the larger array of the species group. ref name etd Range In regards to whether or not members of a species group share a Range biology range , sources differ. A source from Iowa State University Department of Agronomy says that members of a species group usually ... of Zoology Oxford University Press 1999 describes a species group as complex of related species that exist ... crosses in which only certain pairs of species will produce Hybrid biology hybrids . ref name oxford The examples given below may support both uses of the term species group. Arthropod examples The Drosophilidae fruit fly subgenus Sophophora contains the Drosophila melanogaster species group Drosophila melanogaster species group which itself contains 12 subgroups. The Drosophila obscura species group Drosophila obscura species group belongs to the same subgenus and contains 6 subgroups ... in the Drosophila melanogaster species group journal PLoS Biol. volume 5 issue 6 pages e152 year ... of wasp s, only a few species have a scavenger scavenging Habit biology habit as opposed to a strictly ... of these are the three species belonging to the Vespula vulgaris species group which includes the common ... to the Gracilis species group . All of the species in this group are characterized by their long, narrow ... more details
Infobox journal title Mammalian Species cover discipline Mammalogy website http www.science.smith.edu departments Biology VHAYSSEN msi publisher American Society of Mammalogists country United States abbreviation Mamm. Species history 1969 present ISSN 0076 3519 eISSn 1545 1410 OCLC 46381503 LCCN 2004204506 CODEN MLNSBP JSTOR 00763519 Mammalian Species is a Peer review peer reviewed scientific journal published by the American Society of Mammalogists . The journal publishes accounts of 25 35 mammal species yearly. The articles summarize the current literature about each mammal and its systematics , genetics , fossil history, distribution, anatomy , physiology , behavior, ecology , and conservation is described. The journal was established in 1969. External links Official http www.science.smith.edu departments Biology VHAYSSEN msi biology journal stub Category Zoology journals Category Publications established in 1969 el Mammalian Species pl Mammalian Species ... more details
confusing date March 2011 refimprove date March 2011 In biological nomenclature , a type species is a species to which the name of a genus is permanently linked. It comes into play whenever taxon containing multiple species must be divided the type species automatically assigns the name of the original taxon to one of the resulting new taxons, reducing the potential for confusion. Under both the zoological and botanical nomenclature codes, every named genus or subdivision of a genus, whether or not currently ... have a type species, but in practice there is a backlog of untypified names. A similar concept is used for supregeneric groups the type genus . In zoology see also Types in zoology The term type species ... , which defines type species as the name bearing type of the name of a genus or subgenus a rank zoology genus group name is the type species . In the Glossary, type species is defined as The nominal species that is the name bearing type of a nominal genus or subgenus . The type species permanently ... species within that genus to which the genus is permanently linked i.e. the genus must include that species if it is to bear the name . The species name in turn is fixed, in theory, to a type specimen. For example, the type species for the land snail genus Monacha is Monacha cartusiana . That genus ... . The concept of the type species in zoology was introduced by Pierre Andr Latreille . ref name ... species, and can be indicated by the name of this species alone. ref ICBN Art 10.1 Vienna Code, 2005 ... that of a published species although that specific name might be currently regarded as a synonym , and thus only a species name is cited. As a result, despite the provisions of the code, it is not unusual to designate a genus type without regard as to whether that species itself has a type be in an holotype, lectotype or neotype . The term type species , although of no formal standing under the Code .... See also Type biology References Reflist DEFAULTSORT Type Species Category Taxonomy Type Category ... more details
Categories of the threatened species IUCN Red List . Threatened species are any species including ... Conservation Union IUCN is the foremost authority on threatened species, and treats threatened species not as a single category, but as a group of three categories, depending on the degree to which they are threatened Vulnerable species Endangered species Critically endangered speciesSpecies ... Threatened , Least Concern , and the no longer assigned category of Conservation Dependent . Species ... species are threatened species vulnerable is a category of threatened species and, as the more at risk categories of threatened species namely endangered and critically endangered must, by definition, also qualify as vulnerable species, all threatened species may also be considered vulnerable. Threatened species are also referred to as a red listed species, as they are listed in the IUCN Red List IUCN Red List of Threatened Species . Subspecies , populations and stocks may also be classified ... to endangered under the Endangered Species Act ESA . Under the Endangered Species Act in the United States , threatened is defined as any species which is likely to become an endangered species within ... the ESA. Within the U.S., state wildlife agencies have the authority under the ESA to manage species ... therefore are not included on the national list of endangered and threatened species. For example ... Minnesota Endangered & Threatened Species List ref Hi Australian definition The Commonwealth of Australia has legislation for categorising and protecting endangered species, namely the Environment ... doubt that the last member of the species has died , Extinct in the wild known only to survive in cultivation ... future , and Conservation dependent focus of a specific conservation program without which the species ... which gives further protection to certain species, for example Western Australia s Wildlife Conservation Act 1950 . Some species, such as Lewin s Rail Lewinia pectoralis , are not listed as threatened ... more details
Rquote right ... I was much struck how entirely vague and arbitrary is the distinction between species and varieties Charles Darwin On the Origin of Species p. 48 ref name darwin1859 cite book last Darwin first C. authorlink Charles Darwin year 1859 title On the origin of species by means of natural selection publisher Murray location London isbn 8420656070 ref The species problem is a mixture of difficult, related questions that often come up when biologist s identify species and when they define the word species . One common but sometimes difficult question is how best to decide just which particular species an organism belongs to. Another challenge is deciding when to recognize a new species. This is a question for the biologist who discovers organisms that appear to be different from those that belong to already described species. A related question arises when new data indicate that one previously described species actually may include two or more separately evolution evolving groups, each of which could possibly be recognized as a separate species. Many of the debates on species ... as on issues of language and cognitive cognition . This current meaning of the phrase species problem is quite different from what was meant by species problem during the 19th and early 20th centuries, as used by Darwin and others. ref cite book last Robson first G. C. year 1928 title The Species Problem ... and Boyd location Edinburgh ref For Darwin the species problem was the question of speciation how new species arose . Confusion on the meaning of SpeciesSpecies is one of several ranks in the hierarchical ... of classification includes, in addition to species the ranks of genus and Family biology family and others all the way up to Kingdom biology kingdom . Usually the rank of species is the basal rank , meaning that in the system of scientific classification species is the bottommost rank that includes no other ranks. However sometimes when one species, that is already named and described, is found ... more details
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