Temperate broadleaf and mixed forest


Temperate broadleaf and mixed forest
Temperate mixed forest in Yunnan, southwest China.

Mixed forests are a temperate and humid biome. The typical structure of these forests includes four layers. The uppermost layer is the canopy composed of tall mature trees ranging from 33 to 66 m (100 to 200 feet) high. Below the canopy is the three-layered, shade-tolerant understory that is roughly 9 to 15 m (30 to 50 feet) shorter than the canopy. The top layer of the understory is the sub-canopy which is composed of smaller mature trees, saplings, and suppressed juvenile canopy layer trees awaiting an opening in the canopy. Below the sub-canopy is the shrub layer, composed of low growing woody plants. Typically the lowest growing (and most diverse) layer is the ground cover or herbaceous layer.

Contents

Trees

Characteristic dominant broadleaf trees in this biome include oaks (Quercus spp.), beeches (Fagus spp.), maples (Acer sap.), and birches (Betula spp.).[1] The term "mixed forest" comes from the inclusion of coniferous trees as a canopy component of these forests. Typical coniferous trees include: Pines (Pinus spp.), firs (Abies spp.), and spruces (Picea spp.). In some areas of this biome the conifers may be a more important canopy species than the broadleaf species.

Climate

Temperate broadleaf and mixed forests occur in areas with distinct warm and cool season, which give it a moderate annual average temperature (3 to 15.6 °C). These forests occur in relatively warm and rainy climates, sometimes also with a distinct dry season. A dry season occurs in the winter in East Asia and in summer on the wet fringe of the Mediterranean climate zones. Other areas have a fairly even distribution of rainfall; annual rainfall is typically over 600 millimetres (24 inches) and often over 1500 millimetres (60 inches). Temperatures are typically moderate except in parts of Asia such as Ussuriland where temperate forests can occur despite very harsh conditions with very cold winters.

Temperate broadleaf and mixed forest ecoregions

Oceania

Chatham Islands temperate forests New Zealand
Eastern Australian temperate forests Australia
Fiordland temperate forests New Zealand
Nelson Coast temperate forests New Zealand
Northland temperate forests New Zealand
Northland temperate kauri forests New Zealand
Stewart Island/Rakiura temperate forests New Zealand
Richmond temperate forests New Zealand
Southeast Australia temperate forests Australia
Southland temperate forests New Zealand
Tasmanian Central Highland forests Australia
Tasmanian temperate forests Australia
Tasmanian temperate rain forests Australia
Westland temperate forests New Zealand


Eurasia

Indomalaya Temperate broadleaf and mixed forestsv · Eastern Himalayan broadleaf forests
Bhutan, India, Nepal
Northern Triangle temperate forests Burma
Western Himalayan broadleaf forests India, Nepal, Pakistan
Palearctic Temperate broadleaf and mixed forestsv · Appenine deciduous montane forests
Italy
Atlantic mixed forests Belgium, Denmark, France, Germany. Netherlands
Azores temperate mixed forests Portugal
Balkan mixed forests Bulgaria, Greece, Macedonia, Romania, Serbia (Kosovo), Turkey
Baltic mixed forests Denmark, Germany, Poland, Sweden
Cantabrian mixed forests Portugal, Spain
Caspian Hyrcanian mixed forests Azerbaijan, Iran
Caucasus mixed forests Armenia, Azerbaijan, Georgia, Russia, Turkey
Celtic broadleaf forests Ireland, United Kingdom
Central Anatolian deciduous forests Turkey
Central China loess plateau mixed forests China
Central European mixed forests Austria, Belarus, Czech Republic, Germany, Lithuania, Moldova, Poland
Central Korean deciduous forests North Korea, South Korea
Changbai Mountains mixed forests China, North Korea
Changjiang Plain evergreen forests China
Crimean Submediterranean forest complex Russia, Ukraine
Daba Mountains evergreen forests China
Dinaric Mountains mixed forests Albania, Bosnia and Herzegovina, Croatia, Italy, Montenegro, Serbia, Slovenia
East European forest steppe Bulgaria, Moldova, Romania, Russia, Ukraine
Eastern Anatolian deciduous forests Turkey
English Lowlands beech forests United Kingdom
Euxine-Colchic deciduous forests Georgia, Turkey
Hokkaido deciduous forests Japan
Huang He Plain mixed forests China
Madeira evergreen forests Portugal
Manchurian mixed forests China, North Korea, Russia, South Korea
Nihonkai evergreen forests Japan
Nihonkai montane deciduous forests Japan
North Atlantic moist mixed forests Ireland, United Kingdom
Northeast China Plain deciduous forests China
Pannonian mixed forests Austria, Bosnia and Herzegovina, Croatia, Czech Republic, Hungary, Romania, Serbia, Slovakia, Slovenia, Ukraine
Po Basin mixed forests Italy
Pyrenees conifer and mixed forests Andorra, France, Spain
Qin Ling Mountains deciduous forests China
Rodope montane mixed forests Bulgaria, Greece, Macedonia, Serbia
Sarmatic mixed forests Belarus, Estonia, Finland, Latvia, Lithuania, Norway, Russia, Sweden
Sichuan Basin evergreen broadleaf forests China
South Sakhalin-Kurile mixed forests Russia
Southern Korea evergreen forests South Korea
Taiheiyo evergreen forests Japan
Taiheiyo montane deciduous forests Japan
Tarim Basin deciduous forests and steppe China
Ussuri broadleaf and mixed forests Russia
West Siberian broadleaf and mixed forests Russia
Western European broadleaf forests Austria, Czech Republic, France, Germany, Switzerland
Zagros Mountains forest steppe Iran

Americas

Nearctic Temperate broadleaf and mixed forestsv · Allegheny Highlands forests
United States
Appalachian mixed mesophytic forests United States
Appalachian-Blue Ridge forests United States
California mixed evergreen forest United States
Central U.S. hardwood forests United States
East Central Texas forests United States
Eastern forest-boreal transition Canada, United States
Eastern Great Lakes lowland forests Canada, United States
Gulf of St. Lawrence lowland forests Canada
Lac Saint-Jean and Saguenay valley forests Canada
Mississippi lowland forests United States
New England-Acadian forests Canada, United States
Northeastern coastal forests United States
Ozark Mountain forests United States
Southeastern mixed forests United States
Southern Great Lakes forests United States
Upper Midwest forest-savanna transition United States
Western Great Lakes forests Canada, United States
Willamette Valley forests United States
Neotropic Temperate broadleaf and mixed forestsv · Juan Fernandez Islands temperate forests
Chile
Magellanic subpolar forests Argentina, Chile
Polylepis forests Bolivia, Peru
San Felix-San Ambrosio Islands temperate forests (Desventuradas Islands) Chile
Valdivian temperate rain forests Argentina, Chile

See also

External links

References

  1. ^ World Wildlife Fund: Temperate Broadleaf and Mixed Forest Ecoregions

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