Conservation biology
216216
225360233
2008-07-13T07:52:12Z
Geronimo20
332930
update template
:''"Conservation Biology" redirects here. For the [[scientific journal]], see ''[[Conservation Biology (journal)]].
{{Portalpar|Sustainable development|Sustainable development.svg}}
'''Conservation biology''', or '''conservation ecology''', is the science of analyzing and protecting Earth's [[biodiversity|biological diversity]]. Conservation biology is an interdisciplinary subject drawing on biological, physical and social sciences, economics, and the practice of natural-resource management. The rapid decline of biological systems around the world means that conservation biology is often referred to as a "Discipline with a deadline"<ref>[[EO Wilson|Wilson, E.O]]. 2002. The Future of Life. Knopf</ref>. Conservation ecology addresses [[population dynamics]] issues associated with the small population sizes of [[rare species]] (e.g., [[minimum viable population]]s). The term "conservation biology" refers to the Conservation biology is the scientific study of the phenomena that affect the maintenance, loss, and restoration of [[biodiversity|biological diversity]] and the application of science to the conservation of [[gene]]s, [[population]]s, [[species]], and [[ecosystem]]s. For the history of biodiversity conservation and volunteer activity, see [[conservation movement]].
In the 19th century actions in the [[United Kingdom]], the [[United States]] and certain other western countries emphasized the protection of habitat areas pursuant to visions of such people as [[John Muir]] and [[Theodore Roosevelt]]. Not until the mid 20th century did efforts arise to target individual species for conservation, notably efforts in big cat conservation in [[South America]] led by the [[New York Zoological Society]].<ref>A.R. Rabinowitz, ''Jaguar: One Man's Battle to Establish the World's First Jaguar Preserve'', Arbor House, New York, N.Y. (1986)</ref> By the 1970s, led primarily by work in the United States under the [[Endangered Species Act]]<ref>U.S. Endangered Species Act (7 U.S.C. § 136, 16 U.S.C. § 1531 et seq.) of 1973, Washington DC, U.S. Government Printing Office</ref> along with [[Biodiversity Action Plan]]s developed in [[Australia]], [[Sweden]], the [[United Kingdom]], hundreds of specific species protection plans ensued. The [[Society for Conservation Biology]] is a global community of conservation professionals dedicated to advancing the science and practice of conserving Earth's biological diversity.
==Threats to biological diversity==
Presently the Earth is undergoing the [[Holocene Mass Extinction]], an era of unprecedented number of [[species]] [[extinction]]s.<ref>J.H.Lawton and R.M.May, ''Extinction rates'', [[Oxford University]] Press, Oxford, UK</ref> Human influence over the Earth's [[ecosystem]]s has been so extensive within the last 10,000 years, that scientists have difficulty estimating the total number of species lost in this era;<ref name="Ehrlich">Paul Ehrlich and Anne Ehrlich, ''Extinction'', Random House, New York (1981) ISBN 0-394-51312-6</ref> that is to say the rates of deforestation, reef destruction, wetlands filling and other human acts are proceeding much faster than human assessment of the Earth's species. The matter of ongoing species loss is made more complex by the fact that most of the Earth's species have not been described or evaluated for endangerment. The IUCN has found that 23 percent of [[vertebrate]]s, 53 percent of [[invertebrate]]s and 70 percent of plants that have been evaluated are designated as endangered or threatened.<ref name = "IUCN">[http://www.iucnredlist.org/info/tables/table1 IUCN Red-list statistics (2006)]</ref> (The IUCN does not disaggregate endangered from critically endangered or threatened for the purpose of these statistics.)
Historically the main threat to biodiversity has been a set of threats generated from the [[overpopulation]] of humans: mass [[agriculture]], [[deforestation]], [[overgrazing]], [[slash-and-burn]], urban development, [[pesticide]] use.<ref name="Ehrlich">Paul Ehrlich and Anne Ehrlich, ''Extinction'', Random House, New York (1981) ISBN 0-394-51312-6</ref>
Worldwide, the effects of [[global warming]] add a potentially catastrophic threat to global biological diversity; a 2004 study by [[Chris Thomas]], [[Lee Hannah]], et al. estimated that 15 to 37 percent of all species would become extinct by 2050.<ref>* Chris D. Thomas, Alison Cameron, et al. [http://www.nature.com/nature/journal/v427/n6970/abs/nature02121.html Extinction risk from climate change] Nature 427, 145-148 (8 January 2004) | doi: 10.1038/nature02121
* [http://news.nationalgeographic.com/news/2004/01/0107_040107_extinction.html By 2050 Warming to Doom Million Species, Study Says]</ref>
==Importance of biological diversity==
:''See also: [[Biodiversity#Benefits of biodiversity|Benefits of biodiversity]]
Biologist Bruce Walsh of the [[University of Arizona]] states three reasons for scientific interest in the preservation of species; [[Genetics|genetic]] or [[medical]] resources,<ref>[http://biology.about.com/library/weekly/aa011504a.htm Why preserve endangered species]</ref><ref>[http://www.earthisland.org/tpp/esfactsheet.htm Endangered Tibetan species with medical uses]</ref> ecosystem stability, and [[ethics]].<ref name="Walsh">Walsh, Bruce. [http://nitro.biosci.arizona.edu/courses/EEB105/lectures/extinction/extinction.html Extinction]. Bioscience at University of Arizona. URL accessed [[July 26]] [[2006]].</ref>, and today the scientific community "stress[es] the importance" of maintaining biodiversity<ref name="CREOcare">Committee on Recently Extinct Organisms. "[http://creo.amnh.org/care.html Why Care About Species That Have Gone Extinct?]". URL accessed [[July 30]] [[2006]].</ref>.
Biodiversity provides many [[ecosystem services]] that are often not readily visible. It plays an essential part in regulating the chemistry of our [[atmosphere]], pollinating [[crop]]s and generating [[water supply]]. Biodiversity is directly involved in recycling [[nutrient]]s and providing fertile soils. Experiments with controlled environments have shown that humans cannot easily build ecosystems to support human needs; for example [[insect]] [[pollination]] cannot be mimicked by man-made construction. The total value of ecosystem services may amount to trillions of dollars in [[ecosystem services]] per annum to mankind.<ref>[http://earthtrends.wri.org/features/view_feature.php?fid=15&theme=5 World Resources Institute: ''Valuing ecosystem services'' (1998)]</ref><ref>[http://books.nap.edu/openbook.php?record_id=9589&page=114 National Academic Press: ''Perspectives on Biodiversity: Valuing Its Role in an Everchanging World'' (1999)]</ref><ref>[http://www.ecotrust.org/press/katoomba_backgrounder.html Valuation of Ecosystem services : A Backgrounder]</ref><ref>[http://essp.csumb.edu/esse/ Ecosystem Services: Estimated value in trillions]</ref> For example, one segment of [[North America]]n forests has been assigned an annual value of 250 billion dollars;<ref>[http://www.eurekalert.org/pub_releases/2006-09/cfc-ccw091806.php Canadian Forest Congress: ''Carbon capture, water filtration, other boreal forest ecoservices worth estimated $250 billion/year'']</ref> as another example, [[honey-bee]] pollination, a small segment of ecosystem services, is estimated to provide between 10 and 18 billion dollars of value per annum.<ref>[http://apis.ifas.ufl.edu/apis92/apnov92.htm APIS, Volume 10, Number 11, November 1992, M.T. Sanford: Estimated value of honey bee pollination]</ref> The value of ecosystem services on one [[New Zealand]] island has been imputed to be as great as the [[GDP]] of that region.<ref>[http://www.ew.govt.nz/enviroinfo/profile/economy/ecoservices.htm Regional council, Waikato: ''The hidden economy'']</ref>
==History==
Conservation biologists trace the ethics that guide their work back to early spiritual philosophies, including the Tao, Shinto, Hindu, Islamic and Buddhist traditions.<ref name="Primack 2004">{{cite book|last = Primack | first =
Richard B. | title = A Primer of Conservation Biology, 3rd ed. | publisher = Sinauer Associates | date= 2004 | pages = 320pp. | isbn = 0-87893-728-5 (pbk)}}</ref> In the West, origins of concern for the destruction of the natural environment by man can be traced to Plato;<ref>Plato, ''The Republic'', Penguin Classics, ISBN 9780140449143</ref>{{Or|date=November 2007}} however, modern roots of conservation biology can be found in the late 18th century [[Age of Enlightenment|Enlightenment]] period particularly in [[England]] and [[Scotland]].<ref>David Evans, ''A History of Nature Conservation in Britain'', Routledge, UK ISBN 9780415144919 (1997)</ref><ref name="Cloyd">Cloyd, E.L., James Burnett, Lord Monboddo (1972)</ref> A number of thinkers, among them notably [[Lord Monboddo]],<ref name="Cloyd">Cloyd, E.L., James Burnett, Lord Monboddo (1972)</ref> described the importance of "preserving nature"; much of this early emphasis had its origins in [[Christian]] [[theology]]. By the early 1800s biogeography was ignited through efforts of [[Von Humboldt]], DeCandolle, [[Lyell]] and [[Charles Darwin|Darwin]];<ref>[http://web2.uwindsor.ca/courses/biology/macisaac/55-437/intro.htm Short history of biogeography and conservation biology]</ref> their efforts, while important in relating species to their environments, fell short of actual conservation.
The term ''conservation'' came into use in the late 19th century and referred to the management, mainly for economic reasons, of such [[natural resources]] as [[timber]], fish, game, topsoil, [[pasture]]land, and minerals, and also to the preservation of forests (see forestry), wildlife (see wildlife refuge), parkland, [[wilderness]], and [[Drainage basin|watershed]]s. Western Europe was the source of much 19th century progress for conservation biology, particularly the British Empire; however, the [[United States]] began making sizable contributions to this field starting with thinking of [[Thoreau]] and taking form in the [[United States Congress]] passing the Forest Act of 1891, [[John Muir]]'s work and the founding of the [[Sierra Club]] in 1895, founding of the [[New York Zoological Society]] in 1895 and establishment of a series of national forests and preserves by [[Theodore Roosevelt]] from 1901 to 1909.<ref>[http://www.runet.edu/~wkovarik/envhist/5progressive.html Environmental timeline 1890-1920]</ref>
In the early 20th century the New York Zoological Society was instrumental in developing concepts of establishing preserves for particular species and conducting the necessary conservation studies to determine the suitability of specific locations that are most appropriate as conservation priorities; the work of Henry Fairfield Osborn Jr., [[Archie Carr]] and [[Archie Carr III]] is notable in this era.<ref>Carr, Archie (Marjorie Carr Ed.), ''A Naturalist in Florida'' ISBN 0-300-05589-7</ref><ref>[http://www.wku.edu/~smithch/chronob/OSBO1887.h Henry Fairfield Osborn Jr. Biographical summary]</ref>
By the early 1970s national and international governmental agencies became more active in the conservation of biodiversity. Notably the United Nations acted to conserve sites of outstanding cultural or natural importance to the common heritage of mankind. The programme was adopted by the General Conference of [[UNESCO]] in 1972. As of 2006, a total of 830 sites are listed: 644 cultural, 162 natural. The first country to pursue aggressive biological conservation through national legislation was the [[USA]], which passed back to back legislation in the [[Endangered Species Act]]<ref>[http://www.law.cornell.edu/uscode/html/uscode16/usc_sec_16_00001531----000-.html U.S. Endangered Species Act of 1966 with subsequent amendments]</ref> (1966) and [[National Environmental Policy Act]] (1970),<ref>[http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=browse_usc&docid=Cite:+42USC4321 42 USC 4321 National Environmental Policy Act (2000): full text of the law]</ref> which together injected major funding and protection measures to large scale habitat protection and [[threatened]] species research.
In 1980 a significant development was the emergence of the [[urban wildlife|urban conservation]] movement. A local organisation was established in [[Birmingham]], [[UK]], a development followed in rapid succession in cities across the UK, then overseas. Although perceived as a grass-roots movement, its early development was driven by a burgeoning of academic research into urban wildlife. Initially perceived as radical, the urban movement's view of conservation being inextricably linked with other human activity has now become mainstream in conservation thought. Considerable research effort is now directed at urban conservation biology.
By 1992 most of the countries of the world had become committed to the principles of conservation of biological diversity with the [[Convention on Biological Diversity]];<ref>[http://www.biodiv.org/convention/default.shtml Convention on Biological Diversity Official Page]</ref> subsequently many countries began programmes of [[Biodiversity Action Plan]]s to identify and conserve threatened species within their borders, as well as protect associated habitats.
The late 1990s saw increasing professionalism in the sector, with the maturing of organisations such as the [[Institute of Ecology and Environmental Management]] and, more recently, the [[Society for the Environment]].
Since 2000 the concept of [[landscape scale conservation]] has risen to prominence, with less emphasis being given to single-species or even single-habitat focused actions. Instead an ecosystem approach is advocated by most mainstream conservationist, although concerns have been expressed by those working to protect some high-profile species.
The science of ecology has clarified the workings of the [[biosphere]]; i.e., the complex interrelationships among humans, other species, and the physical environment; moreover, the [[overpopulation|burgeoning human population]], and associated [[agriculture]], [[industry]] and its ensuing pollution have demonstrated how easily ecological relationships can be disrupted.<ref>Al Gore, ''Earth in the Balance: Ecology and the Human Spirit'', (1992) 407 pages</ref>
==See also==
* [[Applied ecology]]
* [[Bird observatory]]
* [[Biodiversity]]
* [[Endangered species]]
* [[Environmentalism]]
* [[Ex-situ conservation]]
* [[Extinction]]
* [[Gene pool]]
* [[Genetic erosion]]
* [[Genetic pollution]]
* [[Habitat fragmentation]]
* [[Holocene Mass Extinction]]
* [[In-situ conservation]]
* [[IUCN Red List]]
* [[List of conservation topics]]
* [[Natural history]]
* [[Regional Red List]]
* [[Society for Conservation Biology]]
* [[Wildlife]]
* [[Wildlife conservation]]
* [[Wildlife disease]]
* [[Wildlife management]]
* [[World Conservation Monitoring Centre]]
==References==
{{reflist|2}}
==Further reading==
===Textbooks===
*Groom, M.J., Meffe, G.K. and Carroll, C.R. (2006) ''Principles of Conservation Biology (3rd ed.)''. Sinauer Associates, Sunderland, MA. ISBN 0-87893-518-5
*Norse, Elliott A. and Larry B. Crowder. (2006) '' Marine Conservation Biology: The science of maintaining the sea's biodiversity''. Island Press, Washington, D.C. ISBN 1-55963-662-9
*Primack, Richard B. (2004) ''A Primer of Conservation Biology''. Sinauer Associates, Sunderland, MA. ISBN 0-87893-728-5
*Primack, Richard B. (2006) ''Essentials of Conservation Biology''. Sinauer Associates, Sunderland, MA. ISBN 0-87893-720-X
===Periodicals===
*''[[Conservation Biology (journal)|Conservation Biology]]'', a [[peer-reviewed]] [[journal]] of the [[Society for Conservation Biology]]
*''[http://www.conbio.org/CIP/ Conservation]'', a quarterly magazine published by the Society for Conservation Biology
===Training Manuals===
*Kapoor-Vijay, P and White,J (1992) '' Conservation Biology: A Training Manual for Biological Diversity and Genetic Resources ''. The Commonwealth Science Council, The Commonwealth Secretariat, London,UK. ISBN 0-85092-392-1
==External links==
*[http://www.consbio.org/ Conservation Biology Institute (CBI)]
*[http://www.conservationandscience.org Conservation and Research for Endangered Species (CRES)]
*[http://cbc.amnh.org/ The Center for Biodiversity and Conservation] - (American Museum of Natural History)
*{{sep entry|conservation-biology|Conservation Biology|Sahotra Sarkar}}
{{fisheries and fishing}}
[[Category:Conservation biology| ]] [[Category: Conservation]]
[[ar:علم أحياء الانحفاظ]]
[[ca:Biologia de la conservació]]
[[da:Bevaringsøkologi]]
[[de:Naturschutzbiologie]]
[[es:Biología de la conservación]]
[[fr:Biologie de la conservation]]
[[hu:Természetvédelmi biológia]]
[[ja:保全生態学]]
[[pt:Biologia da conservação]]
[[sl:Varstvena biologija]]