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Concept
Laurel forest
Summary
Laurel forest, also called laurisilva or laurissilva, is a type of subtropical forest found in areas with high humidity and relatively stable, mild temperatures. The forest is characterized by broadleaf tree species with evergreen, glossy and elongated leaves, known as "laurophyll" or "lauroid". Plants from the laurel family (Lauraceae) may or may not be present, depending on the location.
Laurel and laurophyll forests have a patchy distribution in warm temperate regions, often occupying topographic refugia where the moisture from the ocean condenses so that it falls as rain or fog and soils have high moisture levels. They have a mild climate, seldom exposed to fires or frosts and are found in relatively acidic soils. Primary productivity is high, but can be limited by mild summer drought. The canopies are evergreen, dominated by species with glossy- or leathery-leaves, and with moderate tree diversity. Insects are the most important herbivores, but birds and bats are the predominant seed-dispersers and pollinators. Decomposers such as invertebrates, fungi, and microbes on the forest floor are critical to nutrient cycling.
These conditions of temperature and moisture occur in four different geographical regions:
Along the eastern margin of continents at latitudes of 25° to 35°.
Along the western continental coasts between 35° and 50° latitude.
On islands between 25° and 35° or 40° latitude.
In humid montane regions of the tropics.
Some laurel forests are a type of cloud forest. Cloud forests are found on mountain slopes where the dense moisture from the sea or ocean is precipitated as warm moist air masses blowing off the ocean are forced upwards by the terrain, which cools the air mass to the dew point. The moisture in the air condenses as rain or fog, creating a habitat characterized by cool, moist conditions in the air and soil. The resulting climate is wet and mild, with the annual oscillation of the temperature moderated by the proximity of the ocean.
Laurel forests are characterized by evergreen and hardwood trees, reaching up to in height.
Official source
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