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Lake Cadagno
__NOTOC__ Lake Cadagno (Italian: ''Lago di Cadagno'') is a meromictic lake in the Piora valley (canton of Ticino), Switzerland. As one of a few meromictic lakes in Europe, it is the object of numerous scientific studies. The Piora valley - located in the Saint-Gotthard Massif (central Swiss Alps) in the Southern part of Switzerland near Airolo at an altitude of 1921 m above sea level - is a landlocked alpine valley whose scientific value has been recognized for more than two centuries. In the past, the lake was used as a reservoir. Lake Cadagno is a rare example of crenogenic meromixis. Its waters show a permanent stratification due to a natural geological phenomenon. The lower abounds with dissolved mineral salts (sulphate, magnesium, calcium, carbonate) originating from sublacustrine springs, whereas the separate upper layer is permanently oxygenated. Anaerobic phototrophic bacteria – among them ''Chromatium okenii''—thrive between the two layers where they find the ideal co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piora Valley
''Piora'' is a genus of Papuasian plants in the tribe Astereae within the family Asteraceae. ;Species The only known species is ''Piora ericoides'', native to the island of New Guinea New Guinea (; Hiri Motu: ''Niu Gini''; id, Papua, or , historically ) is the world's second-largest island with an area of . Located in Oceania in the southwestern Pacific Ocean, the island is separated from Australia by the wide Torr .... References Monotypic Asteraceae genera Astereae[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eutrophication
Eutrophication is the process by which an entire body of water, or parts of it, becomes progressively enriched with minerals and nutrients, particularly nitrogen and phosphorus. It has also been defined as "nutrient-induced increase in phytoplankton productivity". Water bodies with very low nutrient levels are termed oligotrophic and those with moderate nutrient levels are termed mesotrophic. Advanced eutrophication may also be referred to as dystrophic and hypertrophic conditions. Eutrophication can affect freshwater or salt water systems. In freshwater ecosystems it is almost always caused by excess phosphorus. In coastal waters on the other hand, the main contributing nutrient is more likely to be nitrogen, or nitrogen and phosphorus together. This depends on the location and other factors. When occurring naturally, eutrophication is a very slow process in which nutrients, especially phosphorus compounds and organic matter, accumulate in water bodies. These nutrients deriv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lakes Of Ticino
A lake is an area filled with water, localized in a basin, surrounded by land, and distinct from any river or other outlet that serves to feed or drain the lake. Lakes lie on land and are not part of the ocean, although, like the much larger oceans, they do form part of the Earth's water cycle. Lakes are distinct from lagoons, which are generally coastal parts of the ocean. Lakes are typically larger and deeper than ponds, which also lie on land, though there are no official or scientific definitions. Lakes can be contrasted with rivers or streams, which usually flow in a channel on land. Most lakes are fed and drained by rivers and streams. Natural lakes are generally found in mountainous areas, rift zones, and areas with ongoing glaciation. Other lakes are found in endorheic basins or along the courses of mature rivers, where a river channel has widened into a basin. Some parts of the world have many lakes formed by the chaotic drainage patterns left over from the last ic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Mountain Lakes Of Switzerland
This is a list of high-altitude lakes in Switzerland. It includes all significant lakes, natural or artificial, with an area over 4 hectares and a height over 800 metres above sea level. This height approximately corresponds to the transition between the foothill zone and the montane zone, in the Alps and in the Jura Mountains. Lakes can be found up to elevations of almost 3000 metres, where is the climatic snow line in the Alps. For each lake, the culminating point of the drainage basin is indicated, along with the river basin of which it is part. For a list of artificial lakes only, see List of dams and reservoirs in Switzerland. For a general list of lakes, see List of lakes of Switzerland. Distribution of mountain lakes by canton Main list See also * List of glaciers in Switzerland * List of mountains of Switzerland * List of lakes of Switzerland Notes and references External linksMountain lakes (MySwitzerland.com) {{Portal bar, Geography, Mountains, Switzerlan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Organic Letters
''Organic Letters'' is a biweekly peer-reviewed scientific journal covering research in organic chemistry. It was established in 1999 and is published by the American Chemical Society. In 2014, the journal moved to a hybrid open access publishing model. The founding editor-in-chief was Amos Smith. Since 2019, Erick M. Carreira serves as the editor-in-chief. The journal is abstracted and indexed in: the Science Citation Index Expanded, Scopus, Academic Search Premier, BIOSIS Previews, Chemical Abstracts Service, EMBASE, and MEDLINE MEDLINE (Medical Literature Analysis and Retrieval System Online, or MEDLARS Online) is a bibliographic database of life sciences and biomedical information. It includes bibliographic information for articles from academic journals covering medic .... References External links * American Chemical Society academic journals Biweekly journals Organic chemistry journals Publications established in 1999 English-language journals {{chem-journ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sediments
Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sand and silt can be carried in suspension in river water and on reaching the sea bed deposited by sedimentation; if buried, they may eventually become sandstone and siltstone (sedimentary rocks) through lithification. Sediments are most often transported by water (fluvial processes), but also wind (aeolian processes) and glaciers. Beach sands and river channel deposits are examples of fluvial transport and deposition, though sediment also often settles out of slow-moving or standing water in lakes and oceans. Desert sand dunes and loess are examples of aeolian transport and deposition. Glacial moraine deposits and till are ice-transported sediments. Classification Sediment can be classified based on its grain size, grain shape, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botryococcene
''Botryococcus braunii'' is a green, pyramid-shaped planktonic microalga that is of potentially great importance in the field of biotechnology. Colonies held together by a lipid biofilm matrix can be found in temperate or tropical oligotrophic lakes and estuaries, and will bloom when in the presence of elevated levels of dissolved inorganic phosphorus. The species is notable for its ability to produce high amounts of hydrocarbons, especially oils in the form of Triterpenes, that are typically around 30–40% of their dry weight. Compared to other green alge species it has a relatively thick cell wall that is accumulated from previous cellular divisions; making extraction of cytoplasmic components rather difficult. Much of the useful hydrocarbon oil is outside of the cell. Optimal growth environment ''Botryococcus braunii'' has been shown to grow best at a temperature of 23 °C, a light intensity of 60 W/m2, with a light period of 12 hours per day, and a salinity of 0.15 molar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chromatium Okenii
''Chromatium okenii'' is a Gram-negative bacterium found in water. It belongs to the Purple sulfur bacteria.George M. Garrity: ''Bergey's Manual of Systematic Bacteriology''. 2. Auflage. Springer, New York, 2005, Volume 2: ''The Proteobacteria, Part B: The Gammaproteobacteria'' These bacteria are capable of photosynthesis and use Hydrogen sulfide (H2S) as an electron donor for CO2 reduction and so do not produce oxygen. This type of photosynthesis is called anoxygenic photosynthesis. ''Chromatium okenii'' is anaerobic Anaerobic means "living, active, occurring, or existing in the absence of free oxygen", as opposed to aerobic which means "living, active, or occurring only in the presence of oxygen." Anaerobic may also refer to: * Anaerobic adhesive, a bonding a ... and the cells are slightly curved or straight rods. References External links ''Chromatium''J.P. Euzéby: List of Prokaryotic names with Standing in Nomenclature Chromatiales Bacteria described in 1838 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ticino
Ticino (), sometimes Tessin (), officially the Republic and Canton of Ticino or less formally the Canton of Ticino,, informally ''Canton Ticino'' ; lmo, Canton Tesin ; german: Kanton Tessin ; french: Canton du Tessin ; rm, Chantun dal Tessin . is one of the 26 cantons forming the Swiss Confederation. It is composed of eight districts and its capital city is Bellinzona. It is also traditionally divided into the Sopraceneri and the Sottoceneri, respectively north and south of Monte Ceneri. Red and blue are the colours of its flag. Ticino is the southernmost canton of Switzerland. It is one of the three large southern Alpine cantons, along with Valais and the Grisons. However, unlike all other cantons, it lies almost entirely south of the Alps, and has no natural access to the Swiss Plateau. Through the main crest of the Gotthard and adjacent mountain ranges, it borders the canton of Valais to the northwest, the canton of Uri to the north and the canton of Grisons to the northea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Airolo
Airolo (''Airöö'' in Lombard, in rm, italic=yes, ) is a municipality in the district of Leventina in the canton of Ticino in Switzerland. Geography Airolo is located in Leventina valley and the Lepontine Alps, on the southern flank of the St. Gotthard Pass. Both the Gotthard rail tunnel, on the important Gotthard railway linking northern and southern Europe, and the Gotthard road tunnel, on the A2 motorway, have their southern portal in Airolo. It is the largest municipality in the canton of Ticino, and consists of the village of Airolo and the hamlets of Valle, Madrano, Brugnasco, Nante and Fontana. The municipalities of Airolo and Quinto are considering a merger some time in the future into a new municipality which will be known as Airolo-Quinto.Amtliches Ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saint-Gotthard Massif
The Gotthard Massif or Saint-Gotthard Massif (german: Gotthardmassiv or ; it, Massiccio del San Gottardo; rm, Massiv dal Gottard) is a mountain range in the Alps in Switzerland, located at the border of four cantons: Valais, Ticino, Uri and Graubünden. It is delimited by the Nufenen Pass on the west, by the Furka Pass and the Oberalp Pass on the north and by the Lukmanier Pass on the east. The eponymous Gotthard Pass, lying at the heart of the massif, is the main route from north to south (excluding tunnels). The region of the Gotthard lies at the heart of the Swiss Alps, often referred to as the "water tower of Europe". Three major rivers take their source in the Gotthard Massif: the Reuss, Rhine and Ticino. A fourth river, the Rhône, takes its source in very close proximity of the massif, just north of the Furka Pass. A trekking itinerary, the Vier-Quellen-Weg ("four springs trail"), crosses the Gotthard Massif. Peaks The highest peaks of the massif are Pizzo RotondoKarl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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