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Global 200

 
Wikipedia: Global 200

The Global 200 is the list of ecoregions identified by the World Wildlife Fund (WWF) as priorities for conservation. According to the 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 (Dinerstein et al. 1995, TNC 1997)."

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.

Contents

Background

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

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 biogeographical realms (formerly called kingdoms, and which the WWF 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

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 ecozone. 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

Tropical and subtropical moist broadleaf forests

Afrotropic

Australasia

Indomalaya

Neotropic

  • Greater Antillean moist forests
    • NT0120 Cuban moist forests
    • NT0127 Hispaniolan moist forests
    • NT0131 Jamaican moist forests
    • NT0155 Puerto Rican moist forests
  • Talamancan-Isthmian Pacific forests
  • Choco - Darien moist forests
    • NT0115 Choco-Darien moist forests
  • Northern Andean montane forests
    • NT0145 Northwestern Andean montane forests
  • Coastal Venezuela montane forests
    • NT0147 Orinoco Delta swamp forests
    • NT0169 Tepuis
    • NT0171 Trinidad and Tobago moist forests
  • Guianan moist forests
    • NT0125 Guianan moist forests
  • Napo moist forests
    • NT0142 Napo moist forests
  • Rio Negro - Jurua moist forests
    • NT0132 Japura-Solimoes-Negro moist forests
    • NT0133 Jurua-Purus moist forests
    • NT0158 Rio Negro campinarana
  • Guayana Highlands moist forests
    • NT0124 Guayanan Highlands moist forests
  • Central Andean yungas
    • NT0105 Bolivian Yungas
    • NT0153 Peruvian Yungas
  • Southwestern Amazonian moist forests
    • NT0166 Southwest Amazon moist forests
  • Atlantic forests

Oceania

Tropical and subtropical dry broadleaf forests

Afrotropic

Australasia

Indomalaya

Neotropic

Oceania

Tropical and subtropical coniferous forests

Nearctic

Neotropic

Temperate broadleaf and mixed forests

Australasia

  • Eastern Australia temperate forests
    • AA0402 Eastern Australian temperate forests
  • Tasmanian temperate rain forests
  • New Zealand temperate forests
    • AA0403 Fiordland temperate forests
    • AA0404 Nelson Coast temperate forests
    • AA0405 Northland temperate forests
    • AA0406 Northland temperate kauri forests
    • AA0407 Rakiura Island temperate forests
    • AA0410 Southland temperate forests
    • AA0414 Westland temperate forests

Indomalaya

Nearctic

Palearctic

  • Southwest China temperate forests
    • PA0417 Daba Mountains evergreen forests
    • PA0434 Qin Ling Mountains deciduous forests
    • PA0437 Sichuan Basin evergreen broadleaf forests
  • Russian Far East temperate forests
    • PA0426 Manchurian mixed forests
    • PA0443 Ussuri broadleaf and mixed forests

Temperate coniferous forests

Nearctic

Neotropic

Palearctic

Boreal forests/taiga

Nearctic

  • Muskwa / Slave Lake boreal forests
    • NA0610 Muskwa-Slave Lake forests
  • Canadian Boreal Forests
    • NA0606 Canadian taiga

Palearctic

  • Ural Mountains taiga
    • PA0610 Urals montane tundra and taiga
  • East Siberian taiga
  • Kamchatka taiga and grasslands
    • PA0603 Kamchatka-Kurile meadows and sparse forests
    • PA0604 Kamchatka-Kurile taiga

Tropical and subtropical grasslands, savannas, and shrublands

Afrotropic

Australasia

  • Northern Australia and Trans-Fly savannas
    • AA0701 Arnhem Land tropical savanna
    • AA0702 Brigalow tropical savanna
    • AA0703 Cape York tropical savanna
    • AA0704 Carpentaria tropical savanna
    • AA0705 Einasleigh upland savanna
    • AA0706 Kimberly tropical savanna
    • AA0708 Trans Fly savanna and grasslands

Indomalaya

Neotropic

  • Llanos savannas
  • Cerrado woodlands and savannas

Temperate grasslands, savannas, and shrublands

Australasia

  • Central Range subalpine grasslands
    • AA0802 Central Range sub-alpine grasslands

Nearctic

  • Northern prairie
    • NA0810 Northern mixed grasslands
    • NA0811 Northern short grasslands
    • NA0812 Northern tall grasslands

Neotropic

Palearctic

  • Daurian steppe
    • PA0804 Daurian forest steppe

Flooded grasslands and savannas

Afrotropic

Indomalaya

  • Rann of Kutch flooded grasslands
    • IM0901 Rann of Kutch seasonal salt marsh

Neotropic

Montane grasslands and shrublands

Afrotropic

Indomalaya

  • Kinabalu montane shrublands
    • IM1001 Kinabalu montane alpine meadows

Neotropic

Palearctic

Tundra

Nearctic

  • Alaskan North Slope coastal tundra (Canada, United States)
    • NA1103 Arctic coastal tundra
    • NA1104 Arctic foothills tundra
    • NA1108 Brooks-British Range tundra
  • Canadian low arctic tundra (Canada)
    • NA1114 Low Arctic tundra
    • NA1116 Ogilvie-MacKenzie alpine tundra
    • NA1118 Torngat Mountain tundra

Palearctic

Mediterranean forests, woodlands, and scrub

Afrotropic

  • Fynbos
    • AT1202 Lowland fynbos and renosterveld
    • AT1203 Montane fynbos and renosterveld

Australasia

  • Southwestern Australia forests and scrub
    • AA1201 Coolgardie woodlands
    • AA1202 Esperance mallee
    • AA1209 Southwest Australia savanna
    • AA1210 Southwest Australia woodlands
  • Southern Australia mallee and woodlands
    • AA1203 Eyre and York mallee
    • AA1206 Mount Lofty woodlands
    • AA1208 Naracoorte woodlands

Nearctic

Neotropic

Palearctic

Deserts and xeric shrublands

Afrotropic

Australasia

Nearctic

Neotropic

Palearctic

Mangroves

Afrotropic

  • East African mangroves
    • AT1402 East African mangroves
  • Gulf of Guinea mangroves
    • AT1403 Guinean mangroves
  • Madagascar mangroves
    • AT1404 Madagascar mangroves

Australasia

Indomalaya

  • Greater Sundas mangroves
    • IM1405 Sunda shelf mangroves
  • Sundarbans mangroves

Neartic

  • Northwest Mexican coast mangroves
    • NA1401 Northwest Mexican coast mangroves

Neotropic

  • Guianan - Amazon mangroves
    • NT1401 Alvarado mangroves
    • NT1402 Amapa mangroves
    • NT1406 Belizean reef mangroves
    • NT1411 Guianan mangroves
    • NT1427 Pará mangroves
  • Panama Bight mangroves
    • NT1405 Belizean coast mangroves
    • NT1414 Gulf of Panama mangroves

Global 200: Freshwater ecoregions

Large rivers

Afrotropic

Indomalaya

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

Nearctic

Neotropic

Palearctic

Large river headwaters

Afrotropic

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

Nearctic

  • Mississippi piedmont rivers and streams (United States)

Neotropic

  • 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

Afrotropic

Indomalaya

Palearctic

Small rivers

Afrotropic

  • 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

Indomalaya

Nearctic

  • 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

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

Palearctic

  • 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

Afrotropic

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

Neotropic

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

Palearctic

Small lakes

Afrotropic

  • Cameroon crater lakes (Cameroon)

Australasia

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

Indomalaya

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

Neotropic

  • Mexican highland lakes (Mexico)

Xeric basins

Australasia

  • Central Australian freshwater (Australia)

Nearctic

Palearctic

  • Anatolian freshwater (Syria, Turkey)

Global 200 Marine ecoregions

Polar

Antarctic Ocean

  • Antarctic Peninsula & Weddell Sea

Arctic Ocean

  • Bering Sea (Canada, Russia, United States)
  • Barents-Kara Sea (Norway, Russia)

Temperate shelfs and seas

Mediterranean

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

North Temperate Atlantic

  • Northeast Atlantic Shelf Marine (Belgium, Denmark, Estonia, Finland, France, Germany, Ireland, Latvia, Lithuania, Netherlands, Norway, Poland, Russia, Sweden, United Kingdom)
  • Grand Banks (Canada, St. Pierre and Miquelon (France), United States)
  • Chesapeake Bay (United States)

North Temperate Indo-Pacific

Southern Ocean

  • Patagonian Southwest Atlantic (Argentina, Brazil, Chile, Uruguay)
  • Southern Australian Marine (Australia)
  • New Zealand Marine (New Zealand)

Temperate upwelling

North Temperate Indo-Pacific

South Temperate Atlantic

South Temperate Indo-Pacific

Tropical upwelling

Central Indo-Pacific

  • Western Australian Marine (Australia)

Eastern Indo-Pacific

Eastern Tropical Atlantic

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

Tropical coral

Central Indo-Pacific

  • Nansei Shoto (Japan)
  • Sulu-Sulawesi Seas (Indonesia, Malaysia, Philippines)
  • Bismarck-Solomon Seas (Indonesia, Papua New Guinea, Solomon Islands)
  • Banda-Flores Sea (Indonesia)
  • New Caledonia Barrier Reef (New Caledonia)
  • Great Barrier Reef (Australia)
  • Lord Howe-Norfolk Islands Marine (Australia)
  • Palau Marine (Palau)
  • Andaman Sea (Andaman and Nicobar Islands (India), Indonesia, Malaysia, Myanmar, Thailand)

Eastern Indo-Pacific

  • Tahitian Marine (Cook Islands, French Polynesia)
  • Hawaiian Marine (Hawaii)
  • Rapa Nui (Easter Island)
  • Fiji Barrier Reef (Fiji)

Western Indo-Pacific

  • 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

  • Mesoamerican Reef (Belize, Guatemala, Honduras, Mexico)
  • Greater Antillean Marine (Bahamas, Cayman Islands, Cuba, Dominican Republic, Haiti, Jamaica, Puerto Rico, Turks and Caicos Islands, United States)
  • Southern Caribbean Sea (Aruba, Colombia, Netherlands Antilles, Panama, Trinidad and Tobago, Venezuela)
  • Northeast Brazil Shelf Marine (Brazil)

Priority Places (19)

  • Amazon - World’s largest tropical rain forest and river basin
  • Amur-Heilong - Refuge for the world’s great cats
  • The Arctic - Protecting Arctic Environments
  • Borneo and Sumatra - Priceless forests harbor untold species
  • Chihuahuan Desert - Protecting the balance of a desert
  • Coastal East Africa - Improving livelihoods by conserving nature
  • Congo Basin - Protecting Africa’s tropical forests
  • Coral Triangle - Home to the world’s most abundant variety of corals and sea life
  • Eastern Himalayas - Empowering communities to protect sacred lands
  • The Galápagos - The world’s most treasured islands
  • Gulf of California - Protecting the world’s aquarium
  • Madagascar - Safeguarding one of Earth’s most captivating islands
  • Mekong - Protecting the river of life from source to sea
  • Mesoamerican Reef - The Atlantic Ocean’s largest coral reef
  • Namibia - Empowering communities to manage their natural resources
  • Northern Great Plains - Restoring the great American prairie
  • U.S. Southeast Rivers and Streams - Safeguarding America's richest source of freshwater
  • Southern Chile - A land of ancient forests and abundant oceans
  • Yangtze - Sustaining a valley of life

See also

External links

Gallery


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