- Temperate broadleaf and mixed forests
Temperate broadleaf and mixed forests are a
temperateand humid biome. The typical structure of these forests include four layers. The upper most layer is the canopy which is composed of tall mature trees. Below the canopy is the three-layered, shade tolerant understory. The top layer of the understory is the sub-canopy which is composed of smaller mature trees, saplings, and suppressed juveniles canopy layer trees awaiting an opening in the canopy. Below the sub-canopy is the shrublayer, composed of low growing woody plants. Typically the lowest growing (and most diverse) layer is the ground cover or herbaceouslayer.
broadleaftrees in this biome include oaks (" Quercus" spp.), beeches (" Fagus" spp.), maples ("Acer" spp.), and birches (" Betula" spp.). [ [http://www.panda.org/about_wwf/where_we_work/ecoregions/about/habitat_types/selecting_terrestrial_ecoregions/habitat04.cfm World Wildlife Fund: Temperate Broadleaf and Mixed Forest Ecoregions] ] 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.
Temperate broadleaf and mixed forests occur in areas with distinct warm and cool season, which give it a moderate annual average temperature (5.5-15.6
Celsius). 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 Asiaand in summer on the wet fringe of the Mediterranean climatezones. 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 Ussurilandwhere temperate forests can occur despite extremely harsh conditions with very cold winters.
Temperate broadleaf and mixed forest ecoregions
Australasia temperate broadleaf and mixed forests
Temperate deciduous forest
Trees of the world
* [http://www.barrameda.com.ar/ecology/temperate-forest.htm Temperate forest]
* [http://www.panda.org/about_wwf/where_we_work/ecoregions/maps/index.cfm Map of the ecozones]
* [http://www.cas.vanderbilt.edu/bioimages/ecoframe-list.htm Index of North American Temperate Broadleaf & Mixed Forests ecoregions at bioimages.vanderbilt.edu]
* [http://forest.terraformers.ca/ Terraformers Canadian Forest Conservation Foundation]
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