Wiki article on this topic: A woodland or wood is a low-density forest forming open habitats with plenty of sunlight and limited shade. Woodlands may support an understory of shrubs and herbaceous plants including grasses. Woodland may form a transition to shrubland under drier conditions or during early stages of primary or secondary succession. Higher density areas of trees with a largely closed canopy that provides extensive and nearly continuous shade are referred to as forests.
Extensive efforts by conservationist groups have been made to preserve woodlands from urbanization and agriculture: the woodlands of Northwest Indiana being an example, having been preserved as part of the Indiana Dunes.
Woodland is used in British woodland management to mean tree-covered areas which arose naturally and which are then managed, while forest is usually used in the British Isles to describe plantations, usually more extensive, or hunting Forests, which are a land use with a legal definition and may not be wooded at all. The term ancient woodland is used in British nature conservation to refer to any wooded land that has existed since 1600, and often for thousands of years, since the last Ice Age.
Woodlot is a closely related American term which refers to a stand of trees generally used for firewood. While woodlots often technically have closed canopies, they are so small that light penetration from the edge makes them ecologically closer to woodland than forest.
In Australia, a woodland is defined as an area with sparse cover of trees, and an open woodland has very sparse cover. Woodlands are also subdivided into tall woodlands, or low woodlands, if their trees are over 30 m or under 10 m high respectively. This contrasts with forests, which have greater than 30% cover by trees.
Sudden oak death , an oak disease, results from Phytophthora ramorum, a pathogen that thrives in moist, humid conditions. This causal agent attacks the phloem and cambium of oaks, allowing beetle and fungi infestation. It has killed millions of tanoaks since it was discovered in the mid-1990s. SOD does not affect white oaks and drier areas like foothill woodlands, but affects forests and more moist conditions like live oak woodlands and forests, which have been significantly impacted.
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