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Mire Tmc 819 Lignes
A peatland is a type of wetland whose soils consist of organic matter from decaying plants, forming layers of peat. Peatlands arise because of incomplete decomposition of organic matter, usually litter from vegetation, due to water-logging and subsequent anoxia. Peatlands are unusual landforms that derive mostly from biological rather than physical processes, and can take on characteristic shapes and surface patterning. The formation of peatlands is primarily controlled by climatic conditions such as precipitation and temperature, although terrain relief is a major factor as waterlogging occurs more easily on flatter ground and in basins. Peat formation typically initiates as a paludification of a mineral soil forests, terrestrialisation of lakes, or primary peat formation on bare soils on previously glaciated areas. A peatland that is actively forming peat is called a ''mire''. All types of mires share the common characteristic of being saturated with water, at least season ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palm Oil
Palm oil is an edible vegetable oil derived from the mesocarp (reddish pulp) of the fruit of oil palms. The oil is used in food manufacturing, in beauty products, and as biofuel. Palm oil accounted for about 36% of global oils produced from oil crops in 2014. Palm oils are easier to stabilize and maintain quality of flavor and consistency in ultra-processed foods, so they are frequently favored by food manufacturers. Globally, humans consumed an average of of palm oil per person in 2015. Demand has also increased for other uses, such as cosmetics and biofuels, encouraging the growth of palm oil plantations in tropical countries. The mass production of palm oil in the tropics has attracted the concern of environmental and human rights groups. The palm oil industry is a significant contributor to deforestation in the tropics where palms are grown and has been cited as a factor in social problems due to allegations of human rights violations among growers. In 2018, a repor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hummock
In geology, a hummock is a small knoll or mound above ground.Bates, Robert L. and Julia A. Jackson, ed. (1984). "hummock." Dictionary of Geological Terms, 3rd Ed. New York: Anchor Books. p. 241. They are typically less than in height and tend to appear in groups or fields. Large landslide avalanches that typically occur in volcanic areas are responsible for formation of hummocks. From the initiation of the landslide to the final formation, hummocks can be characterized by their evolution, spatial distribution, and internal structure. As the movement of landslide begins, the extension faulting results in formation of hummocks with smaller ones at the front of the landslide and larger ones in the back. The size of the hummocks is dependent on their position in the initial mass. As this mass spreads, the hummocks further modify to break up or merge to form larger structures. It is difficult to make generalizations about hummocks because of the diversity in their morphology and se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyperus Papyrus
''Cyperus papyrus'', better known by the common names papyrus, papyrus sedge, paper reed, Indian matting plant, or Nile grass, is a species of aquatic plant, aquatic flowering plant belonging to the sedge family Cyperaceae. It is a Hardiness (plants), tender herbaceous perennial, forming tall stands of reed-like swamp vegetation in shallow water. In nature, it grows in full sun, in flooded swamps, and on lake margins throughout Africa (where it is native), Madagascar, and the Mediterranean region. It has been introduced to tropical regions worldwide, such as the Indian subcontinent, South America, and the Caribbean. Along with its close relatives, papyrus sedge has a very long history of use by humans, notably by the Ancient Egyptians (as it is the source of papyrus paper, one of the first types of paper ever made). Parts of the plant can be eaten, and the highly buoyant stems can be made into boats. It is now often cultivated as an ornamental plant. Description This tall, robu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marsh
In ecology, a marsh is a wetland that is dominated by herbaceous plants rather than by woody plants.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p More in general, the word can be used for any low-lying and seasonally waterlogged terrain. In Europe and in agricultural literature low-lying meadows that require draining and embanked polderlands are also referred to as marshes or marshland. Marshes can often be found at the edges of lakes and streams, where they form a transition between the aquatic and terrestrial ecosystems. They are often dominated by grasses, rushes or reeds. If woody plants are present they tend to be low-growing shrubs, and the marsh is sometimes called a carr. This form of vegetation is what differentiates marshes from other types of wetland such as swamps, which are dominated by trees, and mires, which are wetlands that have accumulated deposits of acidic peat. Marshes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peat Swamp Forest
Peat swamp forests are tropical and subtropical moist broadleaf forests, tropical moist forests where waterlogged soil prevents dead leaves and wood from fully decomposing. Over time, this creates a thick layer of acidic peat. Large areas of these forests are being logged at high rates. Peat swamp forests are typically surrounded by lowland rain forests on better-drained soils, and by brackish or salt-water mangrove, mangrove forests near the coast. They are a kind of Mire, peatland, which store and accumulate vast amounts of carbon as soil organic matter—much more than forests on mineral soil (i.e. non-peatland) contain. Peat formation is a natural carbon sink; because the decomposition of the organic matter is slower than its production rate, the surplus accumulates as peat. Their stability has important implications for climate change; they are among the largest near-surface reserves of terrestrial organic carbon. Tropical peat swamp forests, which have ecological importan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swamp
A swamp is a forested wetland.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p. Swamps are considered to be transition zones because both land and water play a role in creating this environment. Swamps vary in size and are located all around the world. The water of a swamp may be fresh water, brackish water, or seawater. Freshwater swamps form along large rivers or lakes where they are critically dependent upon rainwater and seasonal flooding to maintain natural water level fluctuations.Hughes, F.M.R. (ed.). 2003. The Flooded Forest: Guidance for policy makers and river managers in Europe on the restoration of floodplain forests. FLOBAR2, Department of Geography, University of Cambridge, Cambridge, UK. 96 p. Saltwater swamps are found along tropical and subtropical coastlines. Some swamps have hammock (ecology), hammocks, or dry-land protrusions, covered by aquatic vegetation, or vegetation that tolerate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swedish University Of Agricultural Sciences
The Swedish University of Agricultural Sciences, or Swedish Agricultural University (, SLU) is a public research university in Sweden. Although its main campus and head office is located in Ultuna, Uppsala, the university has several campuses in different parts of Sweden; the other main facilities being Alnarp in Lomma Municipality, Skara, and Umeå. Unlike other state-owned universities in Sweden, SLU is funded through the budget for the Ministry of Enterprise and Innovation (previously the Ministry for Rural Affairs). In 2020, the university had 3,155 full-time staff, 4,216 full-time students, 559 research students and 191 professors. SLU is a founding member of the Euroleague for Life Sciences (ELLS), established in 2001. __TOC__ History The university was formed in 1977 by combining three existing separate colleges for veterinary medicine, forestry and agriculture, as well as some smaller units into one organisation in order to improve the efficiency by sharing re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ombrotrophic
Ombrotrophic ("cloud-fed"), from Ancient Greek ὄμβρος (''ómvros'') meaning "rain" and τροφή (''trofí'') meaning "food"), refers to Soil, soils or vegetation which receive all of their water and nutrients from precipitation, rather than from streams or springs. Such environments are hydrology, hydrologically isolated from the surrounding landscape, and since rain is acidic and very low in Plant nutrition, nutrients, they are home to organisms tolerant of acidic, low-nutrient environments. The vegetation of ombrotrophic peatlands is often bog, dominated by ''Sphagnum'' mosses. The hydrology of these environments are directly related to their climate, as precipitation is the water and nutrient source, and temperatures dictate how quickly water evaporates from these systems. Ombrotrophic circumstances may occur even in landscapes composed of limestone or other nutrient-rich substrates – for example, in high-rainfall areas, limestone boulders may be capped by acidic o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Floating Mat
A floating mat () is a layer of mosses and other, especially stoloniferous, plants that grows out from the shore across the surface of a lake or pond. This type of habitat is protected and is designated in the European Habitats Directive as "LRT No. 7140 Transition and Floating Mat Bogs". Landscapes with floating mats are characterized as quagmires. Floating mats are not always capable of bearing weight. There is a risk of drowning when walking on them. Formation The formation of floating mats is a process of sedimentation in water bodies. In bog ponds, floating mats of peat moss form as water levels fall and nutrient (plant), nutrients accumulate. In eutrophic waters, the formation of floating mats is caused by underwater peat that floats to the surface and is colonised by plants. The vegetative mats are held together by their root systems. Phragmites, Reeds or juncus, rushes growing by the lakeshore can eventually cut these mats off, which results in a floating island. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrosere
A hydrosere is a plant succession which occurs in an area of fresh water such as in oxbow lakes and kettle lakes. In time, an area of open freshwater will naturally dry out, ultimately becoming woodland. During this change, a range of different landtypes such as swamp and marsh will succeed each other. The succession from open water to climax woodland takes centuries or millennia. Some intermediate stages will last a shorter time than others. For example, swamp may change to marsh within a decade or less. How long it takes will depend largely on the amount of siltation occurring in the area of open water. Stages Hydrosere is the primary succession sequence which develops in aquatic environments such as lakes and ponds. It results in conversion of water body and its community into a land community. The early changes are allogenic as inorganic particles such as sand and clay are washed from catchment areas and begin filling the basin of the water body. Later, remains of dead pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minerotrophic
Minerotrophic refers to environments that receive nutrients primarily through groundwater that flows through mineral-rich soils or rock,Environment Canada (2014). Ontario wetland evaluation system: Northern Manual, 1st edition, version 3.2. Queen’s printer for Ontario. or surface water flowing over land. Minerotrophic, “minerogenous”, and “geogenous” are now often used interchangeably, although the latter two terms refer primarily to hydrological systems, while the former refers to nutrient dynamics. The hydrologic process behind minerotrophic wetlands results in water that has acquired dissolved chemicals which raise the nutrient levels and reduce the acidity. This in turn affects vegetation assemblages and diversity in the wetland in question.Brinson, M. M. (1993). A Hydrogeomorphic Classification for Wetlands. ''Environmental Laboratory (U.S.) & Engineer Research and Development Center (U.S.).'' Retrieved from https://erdc-library.erdc.dren.mil/jspui/bitstream/11681/6483 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
