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species
species
species 1. A group of organisms that resemble each other more than they resemble members of other groups and cannot be subdivided into two or more species. The precise definition of what constitutes a species differs depending on which species concept is applied. According to the
biological species concept, a species comprises a group of individuals that can usually breed among themselves and produce fertile offspring. However, many other species concepts have been proposed, including the
phylogenetic species concept and various
typological species concepts. Typically, a species consists of numerous local populations distributed over a geographical range. Within a species, groups of individuals become reproductively isolated because of geographical or behavioural factors (see
isolating mechanism), and over time may evolve different characteristics and form a new and distinct species.
2. A rank, or category, used in the
classification of organisms. Similar species are grouped into a genus, and a single species may be subdivided into
subspecies or
races. See also
binomial nomenclature.
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 "Rocky Mountain News (Denver, CO)")
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SPECIES OFF ENDANGERED LIST - FROM EXTINCTION BABBITT EMBARRASSED BY AGENCY'S BLUNDER.(News/National/International)
Newspaper article from: Rocky Mountain News (Denver, CO); 7/17/1998; 635 words
; ...Secretary Bruce Babbitt announced in May that 29 endangered species had recovered so well they could come off the endangered species list - proof, he said, ``the Endangered Species Act works.'' It turns out five of those species hadn't...
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Endangered Species Act's silver anniversary.
Newspaper article from: Knight Ridder/Tribune News Service; 12/7/1998; ; 700+ words
; ...silver anniversary of the Endangered Species Act. Twenty-five years ago on that...halt the loss of plant and animal species wherever humanly possible. Over the last quarter century, the Endangered Species Act has had an effect more profound...
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Species and distribution of Penaeoid shrimps in Thailand.(Report)
Magazine article from: Journal of Shellfish Research; 12/1/2007; ; 700+ words
; ABSTRACT Species and distribution of Penaeoid shrimps in...Andaman Sea coast. Identification of species was based on the morphological characters...the current literature. A total of 50 species from 13 genera and 3 families of Penaeoidea...
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Different arbuscular mycorrhizal fungal species are potential determinants of plant community structure.
Magazine article from: Ecology; 9/1/1998; ; 700+ words
; ...structure, i.e., the diversity of plant species, their spatial distribution, and their...approximately]80% of all terrestrial plant species form this symbiosis (Smith and Read 1997...affecting the relative abundance of plant species and plant-species diversity (Grime...
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Species, subspecies, and races.
Magazine article from: Social Research; 6/22/1998; ; 700+ words
; The human species can be looked at from two quite different...fundamentally different from all other species. How do we protect ourselves from such...law, new drugs must be tested on other species before they can be tested on human beings...
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Ecological species groups of South Carolina's Jocassee Gorges, southern Appalachian Mountains1
Magazine article from: Journal of the Torrey Botanical Society; 7/1/2004; ; 700+ words
; ...Clemson, SC 29634-0331 ). Ecological species groups of South Carolina's Jocassee...131: 220-231. 2004.-Ecological species groups, consisting of assemblages of co-occurring plant species exhibiting similar environmental affinities...
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Species replacement during early secondary succession: the abrupt decline of a winter annual.
Magazine article from: Ecology; 3/1/1997; ; 700+ words
; ...numerous studies have described changes in species composition through time and have sought...the conditions under which they effect species replacement (Drury and Nisbet 1973...Walker et al. 1986, Halpern 1989) and species interactions (e.g., exploitative...
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Species Intelligibilis: From Perception to Knowledge.
Magazine article from: The Review of Metaphysics; 12/1/1995; ; 700+ words
; ...development of the doctrine of intelligible species extending from classical thought through...and the elimination of the intelligible species in modern non-Aristotelian speculators...developments. Doctrines concerning sensible species are for the most part excluded, since...
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Species Invasions: Insights into Ecology, Evolution, and Biogeography
Magazine article from: Journal of the Torrey Botanical Society; 4/1/2006; ; 700+ words
; Species Invasions: Insights into Ecology, Evolution...reviewed and popular literature on invasive species has expanded exponentially over the last...problems related to non-native invasive species (NNIS). Indeed, these problems are...
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Species distributions in interdunal swale communities: The effects of soil waterlogging
Magazine article from: The American Midland Naturalist; 1/1/2001; ; 700+ words
; ...soil waterlogging in determining plant species distributions among interdunal swales...field and greenhouse experiments. Most species exhibited significant responses to experimental...distributions in the field. In general dune species such as Ammophila breviligulata and Solidago...
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Endangered Species Act
Book article from: Water:Science and Issues
Endangered Species Act The Endangered Species Act (ESA) has been described as the most comprehensive legislation for the preservation of endangered species ever enacted by any nation. It is also one of the United States...
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Endangered Species
Encyclopedia entry from: The Gale Encyclopedia of Science
Endangered Species Human causes of extinction and endangerme Why are endangered species important? Resources An endangered species of plant, animal, or microorganism is at risk of imminent extinction or extirpation in all or most of its range...
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Species
Book article from: Biology
Species There is little agreement among scientists about the definition of the word "species." However, most biologists would agree that a species is a detectable, naturally occurring group of individuals or populations that is on an evolutionary...
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Specie Payments, Suspension and Resumption of
Dictionary entry from: Dictionary of American History
SPECIE PAYMENTS, SUSPENSION AND RESUMPTION OF SPECIE PAYMENTS, SUSPENSION AND RESUMPTION OF. Under a system of specie payments, it is required by law or custom that fiduciary money, usually in the form of bank notes or government paper money...
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Species Extinction
Encyclopedia entry from: Encyclopedia of Public Health
SPECIES EXTINCTION Evolution is the interplay of...reason, they assume the status of separate species or subspecies. Historically, processes...exactly what the causes of extinction are. Species extinction could arise from a combination...
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