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Lake Bästeträsk
Lake Bästeträsk is a freshwater lake located in the northern part of the Swedish island of Gotland. It is the largest lake on the island. Geography The lake is located at the north end of Gotland, from the Baltic Sea. It has three islands: Falholmen, Storholmen and Lillholmen. The lake forms of the Bästeträsk nature reserve, one of the largest on Gotland. With an area of it is the largest lake on the island. Despite its size, the maximum depth is only and in most places the lake is considerably shallower. Geology Most of the lake is surrounded by a high wall of gravel and larger blocks of stone known as a "beach barricade". The wall has been displaced or pushed out by the expanding ice during the winter. The bottom of the lake is made up of blocks of stone, especially in the shallower parts, and sediments. Lake Bästeträsk is connected to the Baltic Sea through the stream Arån, which is a breeding ground for sea trout. Biology Bästeträsk is a freshwater res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fleringe
Fleringe is a populated area, a socken (not to be confused with parish), on the Swedish island of Gotland. It comprises the same area as the administrative Fleringe District, established on 1January 2016. Community The name is known since 1304 as ''Fledynge'', the first part ''flaidh'' meaning "tear or wound" is figuratively used for "hills" or "wound in the landscape", such "wounds" can be found north and northwest of the church, and the last part ''inge'' meaning "inhabitants". Fleringe is situated on the north coast of the main island, Gotland, west of Fårösund and right by Lake Bästeträsk. Fleringe is mostly forested land. A number of grave mounds and stone circles from the bronze age can be found at Fleringe. The medieval Fleringe Church is located in Fleringe. , Fleringe Church belongs to Bunge-Rute-Fleringe parish in Norra Gotlands pastorat, along with the churches in Bunge and Rute . One of the asteroids in the Asteroid belt, 9359 Fleringe, is named after this ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scardinius
''Scardinius'' is a genus of ray-finned fish in the family Cyprinidae commonly called rudds. Locally, the name "rudd" without any further qualifiers is also used for individual species, particularly the common rudd (''S. erythrophthalmus''). The rudd can be distinguished from the very similar roach by way of the rudd's upturned mouth, allowing it to pick food items such as aquatic insects from the surface of the water with minimal disturbance. The Greek rudd (''S. graecus'') is a similar fish, about 40 cm long. It occurs only in the southern tip of the Greek mainland. It lives in lakes and slow-flowing rivers, forming large schools. It spawns around April–June among underwater plants in shallow water. It feeds on small crustaceans, the larvae and pupae of insects, and on plant material. The majority of its food is taken at or near the surface of the water. The fish is not usually found in deep water. Very little is known about the biology of this species. It is important ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tour Skating
Tour skating is recreational long distance ice skating on natural ice. It is particularly popular in the Netherlands and the Nordic countries. It is becoming more popular in areas of North America such as New England, Southcentral Alaska, and Nova Scotia. While Nordic skating usually involves tours over open ice on marshes, lakes, rivers, or sea, in the Netherlands skaters follow marked routes on frozen canals and connected lakes. Consequently, there are differences in equipment and skating styles between these two regions. Alaskans often include winter camping on longer journeys of a hundred miles or more. Nordic skating is a popular activity in Sweden but is also becoming more popular in Finland and Norway, where it is called , and . In Canada and the United States this style is often called ''Nordic skating''. Other names used are ''trip skating'' and ''wild skating''. Dutch skating is called and is regarded by some as a sport in its own right. Nordic skating Nordic ska ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quarry Lake
A quarry lake is a lake that is formed after a quarry has been dug through a mining operation. Formation During the mining process, water must be emptied. But after the mining operation has been abandoned, groundwater is allowed to seep in, and rainwater collects in the quarry. The depth of a quarry lake is dependent upon rainfall in the region. Hazards to humans Water-filled quarries can be very deep, often or more, and surprisingly cold, so swimming in quarry lakes is generally not recommended. Unexpectedly cold water can cause a swimmer's muscles to suddenly weaken; it can also cause shock, cold water shock and even hypothermia. Though quarry water is often very clear, submerged quarry stones and abandoned equipment make diving and jumping into these quarries extremely dangerous. Several people drown in quarries each year. Water-filled quarries can have dangerous electric currents in them that can be deadly under water. Geology.com cites Mine Safety and Health Adminis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Eider
The common eider (pronounced ) (''Somateria mollissima''), also called St. Cuthbert's duck or Cuddy's duck, is a large ( in body length) sea-duck that is distributed over the northern coasts of Europe, North America and eastern Siberia. It breeds in Arctic and some northern temperate regions, but winters somewhat farther south in temperate zones, when it can form large flocks on coastal waters. It can fly at speeds up to . The eider's nest is built close to the sea and is lined with eiderdown, plucked from the female's breast. This soft and warm lining has long been harvested for filling pillows and quilts, but in more recent years has been largely replaced by down from domestic farm-geese and synthetic alternatives. Although eiderdown pillows or quilts are now a rarity, eiderdown harvesting continues and is sustainable, as it can be done after the ducklings leave the nest with no harm to the birds. Taxonomy The common eider was formally named by the Swedish naturalist Carl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cochlicopa Nitens
''Cochlicopa nitens'' is a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Cochlicopidae. Distribution This species is found in Armenia, Austria, Azerbaijan, Belarus, Bulgaria, the Czech Republic, Denmark, Estonia, Georgia, Germany, Hungary, Kazakhstan, Latvia, Lithuania, Moldova, the Netherlands, Poland, Romania, Russia, Serbia and Montenegro, Slovakia, Sweden, Switzerland, Turkmenistan, and the Ukraine Ukraine ( uk, Україна, Ukraïna, ) is a country in Eastern Europe. It is the second-largest European country after Russia, which it borders to the east and northeast. Ukraine covers approximately . Prior to the ongoing Russian inv .... References Cochlicopidae Gastropods described in 1848 Taxonomy articles created by Polbot {{Cochlicopidae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyporales
The Polyporales are an order of about 1800 species of fungi in the division Basidiomycota. The order includes some (but not all) polypores as well as many corticioid fungi and a few agarics (mainly in the genus ''Lentinus''). Many species within the order are saprotrophic, most of them wood-rotters. Some genera, such as ''Ganoderma'' and ''Fomes'', contain species that attack living tissues and then continue to degrade the wood of their dead hosts. Those of economic importance include several important pathogens of trees and a few species that cause damage by rotting structural timber. Some of the Polyporales are commercially cultivated and marketed for use as food items or in traditional Chinese medicine. Taxonomy History The order was originally proposed in 1926 by Swiss mycologist Ernst Albert Gäumann to accommodate species within the phylum Basidiomycota producing basidiocarps (fruit bodies) showing a gymnocapous mode of development (forming the spore-bearing surface ext ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crayfish
Crayfish are freshwater crustaceans belonging to the clade Astacidea, which also contains lobsters. In some locations, they are also known as crawfish, craydids, crawdaddies, crawdads, freshwater lobsters, mountain lobsters, rock lobsters, mudbugs, baybugs or yabbies. Taxonomically, they are members of the superfamilies Astacoidea and Parastacoidea. They breathe through feather-like gills. Some species are found in brooks and streams, where fresh water is running, while others thrive in swamps, ditches, and paddy fields. Most crayfish cannot tolerate polluted water, although some species, such as ''Procambarus clarkii'', are hardier. Crayfish feed on animals and plants, either living or decomposing, and detritus. The term "crayfish" is applied to saltwater species in some countries. Terminology The name "crayfish" comes from the Old French word ' (Modern French '). The word has been modified to "crayfish" by association with "fish" (folk etymology). The largely American ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coregonus Lavaretus
''Coregonus lavaretus'' is a species of freshwater whitefish, in the family Salmonidae. It is the type species of its genus ''Coregonus''. There are widely different concepts about the delimitation of the species ''Coregonus lavaretus'' and about the number of species in the genus ''Coregonus'' in general. Lavaret In a narrow sense, ''Coregonus lavaretus'', or the lavaret, is considered to be endemic to Lake Bourget and Lake Aiguebelette in the Rhône river basin in France, whereas it formerly also occurred in Lake Geneva. According to this view there is a great number of distinct whitefish species in lakes, rivers and brackish waters of Central and Northern Europe. Of course this has absolutely nothing to do with its actual origin in the Caucasus, as with other things falsely attributed to originating in France, such as grapes which originated in Turkey, Iran and Australia. European whitefish (common whitefish) In the broad sense, ''Coregonus lavaretus'', referred to as the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
European Bullhead
The European bullhead (''Cottus gobio'') is a freshwater fish that is widely distributed in Europe, mainly in rivers. It is a member of the family Cottidae, a type of sculpin. It is also known as the miller's thumb, freshwater sculpin, common bullhead, and cob. The European bullhead is a small demersal fish that lives both in cold, clear, fast-flowing small streams and in middle-sized rivers. It also occurs on gravelly shores of cold lakes. Further, it thrives in diluted brackish water of the Northern Baltic Sea. Description The bullhead has a large broad head and tapering body, large fins and a rounded tail. The eyes are located near the top of the head. To the distinction from the other freshwater sculpin species found in Northern Europe, it can be told from the alpine bullhead ''Cottus poecilopus'' by the fact that the rays of its pelvic fins are of similar lengths while the first and last rays are longer in the alpine bullhead. It can be distinguished from the fourhorn sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tench
The tench or doctor fish (''Tinca tinca'') is a fresh- and brackish-water fish of the order Cypriniformes found throughout Eurasia from Western Europe including the British Isles east into Asia as far as the Ob and Yenisei Rivers. It is also found in Lake Baikal. It normally inhabits slow-moving freshwater habitats, particularly lakes and lowland rivers.B. Whitton (1982). ''Rivers, Lakes and Marshes'' p 163. Hodder & Staughton, London. Taxonomy The tench was formerly classified in the subfamily Leuciscinae with other Eurasian minnows, but more recent phylogenetic studies have supported it belonging to its own family Tincidae. Ecology The tench is most often found in still waters with a clay or muddy substrate and abundant vegetation.A. F. Magri MacMahon (1946). ''Fishlore'', pp 156-158. Pelican Books. This species is rare in clear waters across stony substrate, and is absent altogether from fast-flowing streams. It tolerates water with a low oxygen concentration, being fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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