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Topic is one of the core types in Freebase. Topics contain a set of default properties that are generally useful when describing a topic: display name, alias, article, image and webpage.
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| x name | x image | x Also known as | x article | x Subjects |
| Acid rain |
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Acid rain is rain or any other form of precipitation that is unusually acidic, i.e. elevated levels of hydrogen ions (low pH). It has harmful effects on plants, aquatic animals, and infrastructure. Acid rain is mostly caused by emissions of...
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| Kalmia latifolia |
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Kalmia latifolia, commonly called Mountain-laurel or Spoonwood, is a flowering plant in the family Ericaceae, native to the eastern United States, from southern Maine south to northern Florida, and west to Indiana and Louisiana. Mountain-laurel is...
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| Sandstone |
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Sandstone (sometimes known as arenite) is a sedimentary rock composed mainly of sand-sized minerals or rock grains. Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand,...
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| Tree |
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A tree is a perennial woody plant. It is most often defined as a woody plant that has many secondary branches supported clear of the ground on a single main stem or trunk with clear apical dominance. A minimum height specification at maturity is...
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| Sand |
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sand |
Sand is a naturally occurring granular material composed of finely divided rock and mineral particles.
As the term is used by geologists, sand particles range in diameter from 0.0625 (or ⁄16 mm, or 62.5 micrometers) to 2 millimeters. An individual...
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| Shale |
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Shale is a fine-grained, clastic sedimentary rock composed of flakes of clay minerals and tiny fragments of other minerals, especially quartz and calcite. The ratio of clay to other minerals is variable. Shale is characterized by thin laminae or...
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| Moraine |
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A moraine is any glacially formed accumulation of unconsolidated glacial debris (soil and rock) which can occur in currently glaciated and formerly glaciated regions, such as those areas acted upon by a past ice age. This debris may have been...
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| Till |
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Till is unsorted glacial sediment. Glacial drift is a general term for the coarsely graded and extremely heterogeneous sediments of glacial origin. Glacial till is that part of glacial drift which was deposited directly by the glacier. It may vary...
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| Shrub |
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A shrub or bush is a horticultural rather than a strict botanical category of woody plant, distinguished from a tree by its multiple stems and lower height, usually less than 5–6 m (15–20 ft) tall. A large number of plants can be either shrubs or...
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| Vine |
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The term vine may refer to a climbing or trailing plant. The word, derived from Latin vīnea, in the original sense referred to the grapevines (Vitis). The modern extended sense is mostly restricted to North American English, which uses "grapevine"...
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| Northern Red Oak |
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The Northern Red Oak or Champion Oak, Quercus rubra (syn. Quercus borealis), is an oak in the red oak group (Quercus section Lobatae). It is a native of North America, in the northeastern United States and southeast Canada. It grows from the north...
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| Logging |
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Logging is the process in which certain trees are cut down for forest management and timber.
In forestry the term logging is sometimes used in a narrow sense concerning the logistics of moving wood from the stump to somewhere outside the forest,...
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| Sugar Maple |
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Acer saccharum (Sugar Maple) is a species of maple native to the hardwood forests of northeastern North America, from Nova Scotia west to southern Ontario, and south to Georgia and Texas.
It is a deciduous tree normally reaching heights of 25–35 m ...
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| Red Maple |
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Acer rubrum (Red Maple, also known as Swamp or Soft Maple), is one of the most common and widespread deciduous trees of eastern North America. It ranges from the Lake of the Woods on the border between Ontario and Minnesota, east to Newfoundland,...
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| Pasture |
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Pasture is land with vegetation cover used for grazing of livestock as part of a farm, or in ranching or other unenclosed pastoral systems or used by wild animals for grazing or browsing. Prior to the advent of factory farming, pasture was the...
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| Bar |
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A shoal, sandbar (or just bar in context), or gravebar is a somewhat linear landform within or extending into a body of water, typically composed of sand, silt or small pebbles. A spit or sandspit is a type of shoal. Shoals are characteristically...
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| Liriodendron tulipifera |
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Liriodendron tulipifera, commonly known as the American tulip tree, tulip poplar or yellow poplar, is the Western Hemisphere representative of the two-species Liriodendron genus and the tallest eastern hardwood. It is native to eastern North America...
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| Eastern White Pine |
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Eastern white pine (Pinus strobus) is a large pine native to eastern North America, occurring from Newfoundland west to Minnesota and southeastern Manitoba, and south along the Appalachian Mountains to the northern edge of Georgia. It is...
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| American Beech |
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The Fagus grandifolia also known as American Beech is a species of beech native to eastern North America, from Nova Scotia west to southern Ontario in southeastern Canada, west to Wisconsin and south to eastern Texas and northern Florida in the...
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| Non-vascular plant |
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Non-vascular plants is a general term for those plants without a vascular system (xylem and phloem). Although non-vascular plants lack these particular tissues, a number of non-vascular plants possess tissues specialized for internal transport of...
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| Mudflat |
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Mudflats (also mud flats, tidal flats, tide flats, etc.) are coastal wetlands that form when mud is deposited by tides or rivers. They are found in sheltered areas such as bays, bayous, lagoons, and estuaries. Mudflats may be viewed geologically as...
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| Liana |
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A liana is any of various long-stemmed, usually woody vines that are rooted in the soil at ground level and use trees, as well as other means of vertical support, to climb up to the canopy in order to get access to well-lit areas of the forest....
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| Balsam Fir |
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The balsam fir (Abies balsamea) is a North American fir, native to most of eastern and central Canada (Newfoundland west to central Alberta) and the northeastern United States (Minnesota east to Maine, and south in the Appalachian Mountains to West...
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| Forb |
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Forbs are herbaceous flowering plants that are not graminoids (grasses, sedges and rushes). The term is frequently used in vegetation ecology, especially in relation to grasslands. Forbs represent a guild of plant species with broadly similar growth...
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| Sphagnum |
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Sphagnum is a genus of between 151-350 species of mosses commonly called peat moss, due to its prevalence in peat bogs and mires. A distinction is made between sphagnum moss, the live moss growing on top of a peat bog on one hand, and sphagnum peat...
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| Subshrub |
A subshrub (Latin suffrutex) is a short woody plant. It is distinguished from a shrub by its ground-hugging stems and lower height, with overwintering perennial woody growth typically less than 10–20 cm tall, or by being only weakly woody and/or...
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| Loam |
Loam is soil composed of sand, silt, and clay in relatively even concentration (about 40-40-20% concentration respectively), considered ideal for gardening and agricultural uses. Loam soils generally contain more nutrients and humus than sandy soils...
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| Downy Serviceberry |
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Amelanchier arborea (Downy Serviceberry; syn. Mespilus arborea F. Michx.), is native to eastern North America from the Gulf Coast north to Thunder Bay in Ontario and Lake St. John in Quebec, and west to Texas and Minnesota.
Amelanchier arborea is...
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| Eastern Hemlock |
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Tsuga canadensis, also known as Eastern or Canadian Hemlock, and in the French-speaking regions of Canada as Pruche du Canada, is a coniferous tree native to eastern North America. It ranges from northeastern Minnesota eastward through southern...
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| Red Spruce |
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Picea rubens (red spruce) is a species of spruce native to eastern North America. Specifically, its habitat ranges from eastern Quebec to Nova Scotia, and from New England south in the Adirondack Mountains and Appalachians to western North Carolina....
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| White Spruce |
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Picea glauca (White Spruce) is a species of spruce native to the north of North America, from central Alaska east to Newfoundland, and south to northern Montana, Michigan, Maine and Wisconsin; there is also an isolated population in the Black Hills...
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| Yellow Birch |
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Betula alleghaniensis (Yellow Birch), is a species of birch native to eastern North America, from Nova Scotia, New Brunswick, and southern Québec west to Minnesota, and south in the Appalachian Mountains to northern Georgia.
It is a medium-sized...
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| Sweet Birch |
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Black Birch |
Betula lenta (Sweet Birch, also known as Black Birch, Cherry Birch, Mahogany Birch, or Spice Birch) is a species of birch native to eastern North America, from southern Maine west to southernmost Ontario and southern Michigan, and south in the...
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| Mahogany Birch | ||||
| Cherry Birch | ||||
| Spice Birch | ||||
| Beaked Hazel |
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Corylus cornuta (Beaked Hazel) is a deciduous shrubby hazel found in most of North America, from southern Canada south to Georgia and California. It grows in dry woodlands and forest edges and can reach 4 - 8 m tall with stems 10 - 25 cm thick with...
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| ISO 639-3 |
ISO 639-3:2007, Codes for the representation of names of languages — Part 3: Alpha-3 code for comprehensive coverage of languages, is an international standard for language codes in the ISO 639 series. The standard describes three‐letter codes for...
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| Black Cherry |
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Cherries, sweet, raw |
Prunus serotina, commonly called Black Cherry, Wild Black Cherry, Rum Cherry, or Mountain Black Cherry, is a woody plant species belonging to the genus Prunus. This cherry is native to eastern North America from southern Quebec and Ontario south to...
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| Shagbark Hickory |
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The Shagbark Hickory (Carya ovata) is a common hickory in the eastern United States and southeast Canada. It is a large deciduous tree, growing up to 27 m tall, and will live up to 200 years. Mature Shagbarks are easy to recognize because, as their...
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| Woodland and scrub communities in the British National Vegetation Classification system |
This article gives an overview of the woodland and scrub communities in the British National Vegetation Classification system.
The woodland and scrub communities of the NVC were described in Volume 1 of British Plant Communities, first published in...
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| Fraser Fir |
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Abies fraseri (Fraser fir) is a species of fir native to the mountains of the eastern United States. It is closely related to Abies balsamea (balsam fir), of which it has occasionally been treated as a subspecies (as A. balsamea subsp. fraseri ...
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| Balsam woolly adelgid |
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Balsam woolly adelgids (Adelges piceae) are small wingless insects that infest and kill firs, especially Balsam Fir and Fraser Fir. They are an invasive species from Europe introduced to the United States around 1900.
Because they are not native,...
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| Mires in the British National Vegetation Classification system |
This article gives an overview of the mire communities in the British National Vegetation Classification system.
The mire communities of the NVC were described in Volume 2 of British Plant Communities, first published in 1991, along with the heath...
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| Heaths in the British National Vegetation Classification system |
This article gives an overview of the heath communities in the British National Vegetation Classification system.
The heath communities of the NVC were described, along with the mire communities, in Volume 2 of British Plant Communities, first...
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| Mesotrophic grasslands in the British National Vegetation Classification system |
This article gives an overview of the mesotrophic grassland communities in the British National Vegetation Classification system.
The mesotrophic grassland communities of the NVC were described in Volume 3 of British Plant Communities, first...
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| Calcicolous grasslands in the British National Vegetation Classification system |
This article gives an overview of the calcicolous grassland communities in the British National Vegetation Classification system.
The calcicolous grassland communities of the NVC were described in Volume 3 of British Plant Communities, first...
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| Calcifugous grasslands and montane communities in the British National Vegetation Classification system |
Calcifugous grasslands and montane communities are botanical groupings in the British National Vegetation Classification system.
The calcifugous grasslands and montane communities of the NVC were described in Volume 3 of British Plant Communities,...
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| Aquatic communities in the British National Vegetation Classification system |
This article gives an overview of the aquatic communities in the British National Vegetation Classification system.
The aquatic communities of the NVC were described in Volume 4 of British Plant Communities, first published in 1995, along with the...
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| Maritime cliff communities in the British National Vegetation Classification system |
This article gives an overview of the maritime cliff communities in the British National Vegetation Classification system.
The maritime cliff communities of the NVC were described in Volume 5 of British Plant Communities, first published in 2000,...
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| Vegetation of open habitats in the British National Vegetation Classification system |
This article gives an overview of the open habitat communities in the British National Vegetation Classification system.
The open habitat communities of the NVC were described in Volume 5 of British Plant Communities, first published in 2000, along...
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| Tilia americana |
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American Linden |
Tilia americana is a species of Tilia, native to eastern North America, from southeast Manitoba east to New Brunswick, southwest to northeast Texas, and southeast to South Carolina, and west along the Niobrara River to Cherry County, Nebraska....
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| Basswood | ||||
| Lime-Tree | ||||
| Bitternut Hickory |
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The Bitternut Hickory (Carya cordiformis) is a common hickory native to the eastern United States and southeast Canada, from Minnesota, southern Ontario and Vermont south to eastern Texas and northern Florida.
It is a large deciduous tree, growing...
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| Taxus canadensis |
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Taxus canadensis (Canadian Yew) is a conifer native to central and eastern North America, thriving in swampy woods, ravines, riverbanks and on lake shores. Locally called simply "Yew", this species is also referred to as American Yew or Ground...
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| Mountain Holly |
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Ilex mucronata (Mountain Holly or Catberry) is a species of holly native to eastern North America, from Newfoundland west to Minnesota, and south to Maryland and West Virginia.
It was formerly treated in its own monotypic genus as Nemopanthus...
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| Ostrya virginiana |
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Ostrya virginiana (American Hophornbeam), is a species of Ostrya native to eastern North America, from Nova Scotia west to southern Manitoba and eastern Wyoming, southeast to northern Florida and southwest to eastern Texas and northeastern Mexico ....
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| Rhododendron maximum |
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Rhododendron maximum, also called Great Rhododendron, Great Laurel, Rose Bay, American Rhododendron or Big Rhododendron, is a species of Rhododendron native to eastern North America, from Nova Scotia south to northern Alabama.
R. maximum is an...
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| Hamamelis virginiana |
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American witch-hazel |
Hamamelis virginiana is a species of Witch-hazel native to eastern North America, from Nova Scotia west to Minnesota, and south to central Florida to eastern Texas.
It is a deciduous large shrub growing to 6 m (rarely to 10 m) tall, with a dense...
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| Boreal forest of Canada |
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Canada's boreal forest comprises about one third of the circumpolar boreal forest that rings the northern hemisphere, mostly north of the 50th parallel. Other countries with boreal forest include Russia, which contains the majority, and the...
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| Graminoid |
Graminoid is a term for a group of flowering plants that includes grasses (of the family Poaceae, also known as Gramineae) and grass-like plants such as sedges (of the family Cyperaceae) and rushes (family Juncaceae).
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| Northern Hardwood Forest |
Class defined in Allegheny Portage Railroad National Historical Site Vegetation Classification System. "This association is characterized by the dominance of sugar maple(Acer saccharum) covering at least 25% relative cover...
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| Allegheny Portage Railroad National Historical Site Vegetation Classification System |
Detailed local descriptions for 16 vegetation associations were written based on plot data, photographs of each plot, thematic accuracy assessment data, and the ecologists’ field observations at Allegheny Portage Railroad National Historic Site....
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| Sugar Maple - Yellow Birch - Black Cherry Forest | Acer saccharum - Betula alleghaniensis - Prunus serotina Forest | |||
