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Vorlage:Short description Vorlage:For

The Global 200 is the list of ecoregions identified by the World Wide Fund for Nature (WWF), the global conservation organization, as priorities for conservation. According to WWF, an ecoregion is defined as a "relatively large unit of land or water containing a characteristic set of natural communities that share a large majority of their species dynamics, and environmental conditions".[1][2][3] For example, based on their levels of endemism, Madagascar gets multiple listings, ancient Lake Baikal gets one, and the North American Great Lakes get none.

The WWF assigns a conservation status to each ecoregion in the Global 200: critical or endangered; vulnerable; and relatively stable or intact. Over half of the ecoregions in the Global 200 are rated endangered.

Background Bearbeiten

The WWF has identified 867 terrestrial ecoregions across the Earth's land surface, as well as freshwater and marine ecoregions. The goal of this classification system is to ensure that the full range of ecosystems will be represented in regional conservation and development strategies. Of these ecoregions, the WWF selected the Global 200 as the ecoregions most crucial to the conservation of global biodiversity. The Global 200 list actually contains 238 ecoregions, made up of 142 terrestrial, 53 freshwater, and 43 marine ecoregions.

Conservationists interested in preserving biodiversity have generally focused on the preservation of tropical moist broadleaf forests (commonly known as tropical rainforests) because it is estimated that they harbor one half of Earth's species. On the other hand, the WWF determined that a more comprehensive strategy for conserving global biodiversity should also consider the other half of species, as well as the ecosystems that support them.

Several habitats, such as Mediterranean forests, woodlands, and scrub biome, were determined to be more threatened than tropical rain forests, and therefore require concerted conservation action. WWF maintains that "although conservation action typically takes place at the country level, patterns of biodiversity and ecological processes (e.g., migration) do not conform to political boundaries", which is why ecoregion-based conservation strategies are deemed essential.

Classification Bearbeiten

Historically, zoologists and botanists have developed various classification systems that take into account the world's plant and animal communities. Two of the worldwide classification systems most commonly used today were summarized by Miklos Udvardy in 1975.

The Earth's land surface can be divided into eight biogeographic realms (formerly called kingdoms, and which the BBC calls ecozones) that represent the major terrestrial communities of animals and plants, and are a synthesis of previous systems of floristic provinces and faunal regions. The biome system classifies the world into ecosystem types (i.e. forests, grasslands, etc.) based on climate and vegetation. Each biogeographical realm contains multiple biomes, and biomes occur across several biogeographical realms. A system of biogeographical provinces was developed to identify specific geographic areas in each biogeographical realm that were of a consistent biome type, and shared distinct plant and animal communities. The WWF system represents a further refinement of the system of biomes (which the WWF calls "major habitat types"), biogeographical realms, and biogeographical provinces (the WWF scheme divides most biogeographical provinces into multiple smaller ecoregions).

Selection process Bearbeiten

Based on a comprehensive list of ecoregions, The Global 200 includes all major habitat types (biomes), all ecosystem types, and species from every major habitat type. It focuses on each major habitat type of every continent (such as tropical forests or coral reefs). It uses ecoregions as the unit of scale for comparison. WWF say ecoregions could be considered as conservation units at regional scale because they meet similar biological communities.

Some ecoregions were selected over other ecoregions of the same major habitat type (biome) or realm. Selection of the Global 200 relied on extensive studies of 19 terrestrial, freshwater, and marine major habitat types. Selection of the ecoregions was based on analyses of species richness, species endemism, unique higher taxa, unusual ecological or evolutionary phenomena, and global rarity of major habitat type.

Global 200 ecoregion list is most helpful to conservation efforts at a regional scale: local deforestation, destruction of swamp habitats, degradation of soils, etc. However, certain phenomena, such as bird or whale migration, depend on more complex parameters not used to define the current database, such as atmospheric currents and dynamic pelagic ecosystems. These would require gathering more information, and co-ordination of efforts between multiple ecoregions. However, the Global 200 ecoregions can help these efforts by identifying habitat sites and resting sites for migratory animals. It may also help identify the origin of invasive species, and offer insights for slowing down or stopping their intrusion.

Global 200: Terrestrial Bearbeiten

Tropical and subtropical moist broadleaf forests Bearbeiten

Afrotropical Bearbeiten

Australasia Bearbeiten

Indomalaya Bearbeiten

Neotropic Bearbeiten

Oceania Bearbeiten

Tropical and subtropical dry broadleaf forests Bearbeiten

Afrotropic Bearbeiten

Australasia Bearbeiten

Indomalaya Bearbeiten

Neotropic Bearbeiten

Oceania Bearbeiten

Tropical and subtropical coniferous forests Bearbeiten

Nearctic Bearbeiten

Neotropic Bearbeiten

Temperate broadleaf and mixed forests Bearbeiten

Australasia Bearbeiten

Indomalaya Bearbeiten

Nearctic Bearbeiten

Neotropic Bearbeiten

Palearctic Bearbeiten

Temperate coniferous forests Bearbeiten

Nearctic Bearbeiten

Palearctic Bearbeiten

Boreal forests/taiga Bearbeiten

Nearctic Bearbeiten

Palearctic Bearbeiten

Tropical and subtropical grasslands, savannas, and shrublands Bearbeiten

Afrotropic Bearbeiten

Australasia Bearbeiten

Indomalaya Bearbeiten

Neotropic Bearbeiten

  • Llanos savannas
  • Cerrado woodlands and savannas

Temperate grasslands, savannas, and shrublands Bearbeiten

Australasia Bearbeiten

Nearctic Bearbeiten

Neotropic Bearbeiten

Palearctic Bearbeiten

Flooded grasslands and savannas Bearbeiten

Afrotropic Bearbeiten

Indomalaya Bearbeiten

Neotropic Bearbeiten

Montane grasslands and shrublands Bearbeiten

Afrotropic Bearbeiten

Australasian Bearbeiten

Indomalaya Bearbeiten

Neotropic Bearbeiten

Palearctic Bearbeiten

Tundra Bearbeiten

Nearctic Bearbeiten

Palearctic Bearbeiten

Mediterranean forests, woodlands, and scrub Bearbeiten

Afrotropic Bearbeiten

Australasia Bearbeiten

Nearctic Bearbeiten

Neotropic Bearbeiten

Palearctic Bearbeiten

Deserts and xeric shrublands Bearbeiten

Afrotropic Bearbeiten

Australasia Bearbeiten

Nearctic Bearbeiten

Neotropic Bearbeiten

Palearctic Bearbeiten

Mangroves Bearbeiten

Afrotropic Bearbeiten

Australasia Bearbeiten

Indomalaya Bearbeiten

Nearctic Bearbeiten

Neotropic Bearbeiten

Global 200: Freshwater ecoregions Bearbeiten

Large rivers Bearbeiten

Afrotropic Bearbeiten

Indomalaya Bearbeiten

  • Mekong River (Cambodia, China, Laos, Myanmar, Thailand, Vietnam)

Nearctic Bearbeiten

Neotropic Bearbeiten

Palearctic Bearbeiten

Large river headwaters Bearbeiten

Afrotropic Bearbeiten

  • Congo basin piedmont rivers and streams (Angola, Cameroon, Central African Republic, Democratic Republic of Congo, Gabon, Republic of Congo, Sudan)

Nearctic Bearbeiten

Neotropic Bearbeiten

  • Upper Amazon rivers and streams (Bolivia, Brazil, Colombia, Ecuador, French Guiana (France), Guyana, Peru, Suriname, Venezuela)
  • Upper Paraná rivers and streams (Argentina, Brazil, Paraguay)
  • Brazilian Shield Amazonian rivers and streams (Bolivia, Brazil, Paraguay)

Large river deltas Bearbeiten

Afrotropic Bearbeiten

Indomalaya Bearbeiten

Palearctic Bearbeiten

Small rivers Bearbeiten

Afrotropic Bearbeiten

  • Upper Guinea rivers and streams (Côte d'Ivoire, Guinea, Liberia, Sierra Leone)
  • Madagascar freshwater (Madagascar)
  • Gulf of Guinea rivers and streams (Angola, Cameroon, Democratic Republic of Congo, Equatorial Guinea, Gabon, Nigeria, Republic of Congo)
  • Cape rivers and streams (South Africa)

Australasia Bearbeiten

Indomalaya Bearbeiten

Nearctic Bearbeiten

  • Southeastern rivers and streams (United States)
  • Pacific Northwest coastal rivers and streams (United States)
  • Gulf of Alaska coastal rivers and streams (Canada, United States)

Neotropic Bearbeiten

  • Guianan freshwater (Brazil, French Guiana, Guyana, Suriname, Venezuela)
  • Greater Antillean freshwater (Cuba, Dominican Republic, Haiti, Puerto Rico)

Palearctic Bearbeiten

  • Balkan rivers and streams (Albania, Bosnia and Herzogovina, Bulgaria, Croatia, Greece, Macedonia, Turkey, Yugoslavia)
  • Russian Far East rivers and wetlands (China, Mongolia, Russia)

Large lakes Bearbeiten

Afrotropic Bearbeiten

  • Rift Valley lakes (Burundi, Democratic Republic of Congo, Ethiopia, Kenya, Malawi, Mozambique, Rwanda, Tanzania, Uganda, Zambia)

Neotropic Bearbeiten

  • High Andean lakes (Argentina, Bolivia, Chile, Peru)

Palearctic Bearbeiten

Small lakes Bearbeiten

Afrotropic Bearbeiten

  • Cameroon crater lakes (Cameroon)

Australasia Bearbeiten

  • Lakes Kutubu and Sentani (Indonesia, Papua New Guinea)
  • Central Sulawesi lakes (Indonesia)

Indomalaya Bearbeiten

  • Philippines freshwater (Philippines)
  • Inle Lake (Myanmar)
  • Yunnan lakes and streams (China)

Neotropic Bearbeiten

  • Mexican highland lakes (Mexico)

Xeric basins Bearbeiten

Australasia Bearbeiten

  • Central Australian freshwater (Australia)

Nearctic Bearbeiten

Palearctic Bearbeiten

  • Anatolian freshwater (Syria, Turkey)

Global 200 Marine ecoregions Bearbeiten

Polar Bearbeiten

Antarctic Ocean Bearbeiten

Arctic Ocean Bearbeiten

Temperate shelves and seas Bearbeiten

Mediterranean Sea Bearbeiten

  • Mediterranean (Albania, Algeria, Bosnia and Herzegovina, Croatia, Cyprus, Egypt, France, Greece, Israel, Italy, Lebanon, Libya, Malta, Monaco, Morocco, Serbia & Montenegro, Slovenia, Spain, Syria, Tunisia, Turkey)

Temperate Northern Atlantic Bearbeiten

Temperate Northern Pacific Bearbeiten

Southern Ocean Bearbeiten

Temperate upwelling Bearbeiten

North Temperate Indo-Pacific Bearbeiten

South Temperate Atlantic Bearbeiten

South Temperate Indo-Pacific Bearbeiten

Tropical upwelling Bearbeiten

Central Indo-Pacific Bearbeiten

Eastern Indo-Pacific Bearbeiten

Eastern Tropical Atlantic Bearbeiten

  • Canary Current (Canary Islands, Gambia, Guinea-Bissau, Mauritania, Morocco, Senegal, Western Sahara)

Tropical coral Bearbeiten

Central Indo-Pacific Bearbeiten

Eastern Indo-Pacific Bearbeiten

Western Indo-Pacific Bearbeiten

  • Maldives, Chagos, and Lakshadweep atolls (Chagos Archipelago (United Kingdom), India, Maldives, Sri Lanka)
  • Red Sea (Djibouti, Egypt, Eritrea, Israel, Jordan, Saudi Arabia, Sudan, Yemen)
  • Arabian Sea (Djibouti, Iran, Oman, Pakistan, Qatar, Saudi Arabia, Somalia, United Arab Emirates, Yemen)
  • East African Marine (Kenya, Mozambique, Somalia, Tanzania)
  • West Madagascar Marine (Comoros, Madagascar, Mayotte and Iles Glorieuses (France), Seychelles)

Western Tropical Atlantic Bearbeiten

Global Priority Places Bearbeiten

WWF WWF has identified 35 global priority places around the world (terrestrial, freshwater and marine) as either being home to irreplaceable and threatened biodiversity, or representing an opportunity to conserve the largest and most intact representative of their ecosystem.[5]

  1. African Rift Lakes Region - Include the 3 largest lakes in Africa: Victoria, Tanganyika and Malawi, as well as lakes Turkana, Albert, Edward, Kivu and others.
  2. Altai-Sayan Montane Forests - One of the last remaining untouched areas of the world
  3. Amazon Guianas - World's largest tropical rain forest and river basin with a mosaic of mountains, coniferous forests, steppe and alpine meadows.
  4. Amur-Heilong - Refuge for Amur leopard and tiger.
  5. Arctic Seas & Associated Boreal/Tundra - Protecting Arctic Environments
  6. Atlantic Forests - Forest stretches from the Atlantic coast of Brazil, south along the Brazilian Atlantic coastline and inland into northeast Argentina and eastern Paraguay.
  7. Borneo and Sumatra - Priceless forests harbor untold species
  8. Cerrado-Pantanal
  9. Chihuahuan Desert - Protecting the balance of a desert
  10. Chocó–Darién
  11. Coastal East Africa - Improving livelihoods by conserving nature
  12. Congo Basin - Protecting Africa's tropical forests
  13. Coral Triangle - Home to the world's most abundant variety of corals and sea life
  14. Eastern Himalayas - Empowering communities to protect sacred lands
  15. Fynbos
  16. The Galápagos - The world's most treasured islands
  17. Greater Black Sea Basin
  18. Lake Baikal
  19. Madagascar - Safeguarding one of Earth's most captivating islands
  20. Mediterranean Sea
  21. Mekong Complex - Protecting the river of life from source to sea
  22. Miombo woodlands
  23. Namib-Karoo-Kaokoveld
  24. New Guinea & Offshore Islands
  25. Northern Great Plains
  26. Orinoco River & Flooded Forests
  27. Southeastern Rivers and Streams
  28. Southern Chile - A land of ancient forests and abundant oceans
  29. Southern Ocean
  30. Southwest Australia
  31. Southwest Pacific
  32. Sumatra
  33. West Africa Marine
  34. Western Ghats
  35. Yangtze Basin - Sustaining a valley of life

Gallery Bearbeiten

See also Bearbeiten

References Bearbeiten

Vorlage:Reflist

External links Bearbeiten

Vorlage:WWFN Vorlage:Biomes

Vorlage:Use British English Oxford spelling

[[Category:WWF ecoregions]] [[Category:Ecology lists]] [[Category:Environmental conservation]] [[Category:Lists of places]] [[Category:Top lists]]

  1. Olson, D. M. & E. Dinerstein. 1998. The Global 200: A representation approach to conserving the Earth’s most biologically valuable ecoregions. Conservation Biol. 12:502–515.[1] web.archive.org Fehler bei Vorlage * Parametername unbekannt (Vorlage:Webarchiv): "date"Vorlage:Webarchiv/Wartung/Parameter Fehler bei Vorlage:Webarchiv: Genau einer der Parameter 'wayback', 'webciteID', 'archive-today', 'archive-is' oder 'archiv-url' muss angegeben werden.Vorlage:Webarchiv/Wartung/Linktext_fehltVorlage:Webarchiv/Wartung/URL Fehler bei Vorlage:Webarchiv: enWP-Wert im Parameter 'url'..
  2. Olson, D. M., Dinerstein, E. 2002. The Global 200: Priority ecoregions for global conservation. Annals of the Missouri Botanical Garden 89(2):199-224, [2].
  3. The Nature Conservancy. 1997. Designing a geography of hope: guidelines for ecoregion-based conservation in The Nature Conservancy. The Nature Conservancy, Arlington, Virginia
  4. Congolian Coastal Forests - A Global Ecoregion. Archiviert vom Original am 11. Januar 2017; abgerufen am 10. Januar 2017.
  5. WWF's Strategic Plan for Conservation