biological diversity

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Related to biological diversity: Convention on Biological Diversity

biological diversity



the number of species in a given habitat. Scientists have variously estimated that there are from 3 to 30 million extant species, of which 2.5 million have been classified, including 900,000 insects, 41,000 vertebrates, and 250,000 plants; the remainder are invertebrates, fungi, algae, and microorganisms. Although other species remain to be discovered, many are becoming extinct through deforestation, pollution, and human settlement. Much of this diversity is found in the world's tropical areas, particularly in the forestforest,
a dense growth of trees, together with other plants, covering a large area of land. The science concerned with the study, preservation, and management of forests is forestry.
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 regions. A habitat in equilibrium has a balance between the number of species present and its resources. Diversity is affected by resources, productivity, and climate. The more pristine a diverse habitat, the better chance it has to survive a change or threat—either natural or human—because that change can be balanced by an adjustment elsewhere in the community; damaged habitats may be destroyed by breaking the food chain with removal of a single species. Thus, biological diversity helps prevent extinction of species and helps preserve the balance of nature. At the 1992 United Nations Conference on Environment and DevelopmentUnited Nations Conference on Environment and Development
(UNCED) or Earth Summit,
an 11-day meeting held in June, 1992, in Rio de Janeiro, Brazil, to discuss the global conflict between economic development and environmental protection.
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, more than 150 nations signed a treaty intended to protect the planet's biological diversity. See also ecologyecology,
study of the relationships of organisms to their physical environment and to one another. The study of an individual organism or a single species is termed autecology; the study of groups of organisms is called synecology.
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See E. O. Wilson, ed., Biological Diversity (1988); N. Eldredge, Life in the Balance (1998).

References in periodicals archive ?
In a related matter, the Center for Biological Diversity has criticized the U.
For the first time in history, bioprospectors are expected to compensate source countries, thanks to the Convention on Biological Diversity (CBD), signed at the 1992 United Nations Conference on Environment and Development in Brazil.
The Center for Biological Diversity calls the area where the wolves live "severely grazed" and "where carcasses of cattle killed by non-wolf causes dot the landscape, tempting wolves and acclimating them to scavenging near grazing cows.
The renamed Center for Biological Diversity is based in Tucson, Arizona, has a $1.
Conceived as a practical tool for translating the principles of Agenda 21 into reality, the Convention recognizes that biological diversity is about more than plants, animals and micro-organisms and their ecosystems -- it is about people and their need for food security, medicines, fresh air and water, shelter, and a clean and healthy environment in which to live.
The protocol was adopted in January 2000 based on the Convention on Biological Diversity.
The major research issues he addresses include the role of ecological science in decision making, the factors that govern the assembly of ecosystems and determine their response to various stressors, the functioning of the earth's climate system and its role in the determination of the distribution of life on earth, population size control factors, the population level consequences of species' life-history adaptation, the role of the fragmentation of the landscape in the persistence of species on the landscape, the role of biological diversity in ecosystem processes, and the ecological principles that need to be considered in the design of strategies intended to protect biological diversity.
The diverse conservation groups - led by the Center for Biological Diversity, including California Trout, Center for Native Ecosystems (Colorado), Conservation Northwest (Washington), Friends of the Clearwater (Idaho), Restore the North Woods (Maine), Save the Manatee Club (Florida), and Arkansas Fly Fishers, as well as PennFuture - filed a petition under the Administrative Procedure Act to better protect endangered species from many current dangerous threats, particularly global warming, by fully implementing science-based recovery plans and actions.
We don't think it's too late,'' said Ileene Anderson, an ecologist with the Center for Biological Diversity, one of the groups filing the lawsuit.
Underlining that Turkey was rich of biological diversity and endemic plant species, Eker said 3,905 of the 12,000 endemic plant species were in Turkey, "Turkey should be aware of this richness and preserve this for the whole humanity.
recent studies suggest that we have overlooked the critical role [prairie dog and ground squirrel populations] may play in encouraging biological diversity, and have overestimated the impact they have on our own economic interests.
The Center for Biological Diversity and others have concluded that addressing climate change on the federal level--and greatly reducing the level of greenhouse gas emissions--must be implemented quickly to avoid the greatest risk of species' extinction across the country.

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