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Matsalu National Park
Matsalu National Park (previously Matsalu Nature Reserve, et, Matsalu rahvuspark, often just Matsalu) is a nature reserve and national park situated in Lääne and Pärnu Counties, Estonia. Matsalu National Park spans an area of , comprising Matsalu Bay, the Kasari River delta, the village of Matsalu and surrounding areas. Matsalu Bay is one of the most important wetland bird areas in Europe, due to its prime position on the East Atlantic Flyway. Large numbers of migratory birds use Matsalu as a staging area. Every spring over two million waterfowl pass Matsalu, of which around 1.6 million are long-tailed ducks. Matsalu National Park is a home for a number of endangered species, many of which are listed in the Estonian IUCN Red List, including the white-tailed eagle of the highest conservation category, a lot of bird species of the second and third protection categories, 22 strongly protected plant species, the natterjack toad, and ten species of mammals of the second conser ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Estonia
Estonia, formally the Republic of Estonia, is a country by the Baltic Sea in Northern Europe. It is bordered to the north by the Gulf of Finland across from Finland, to the west by the sea across from Sweden, to the south by Latvia, and to the east by Lake Peipus and Russia. The territory of Estonia consists of the mainland, the larger islands of Saaremaa and Hiiumaa, and over 2,200 other islands and islets on the eastern coast of the Baltic Sea, covering a total area of . The capital city Tallinn and Tartu are the two largest urban areas of the country. The Estonian language is the autochthonous and the official language of Estonia; it is the first language of the majority of its population, as well as the world's second most spoken Finnic language. The land of what is now modern Estonia has been inhabited by '' Homo sapiens'' since at least 9,000 BC. The medieval indigenous population of Estonia was one of the last " pagan" civilisations in Europe to adopt Ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natterjack Toad
The natterjack toad (''Epidalea calamita'') is a toad native to sandy and heathland areas of Europe. Adults are 60–70 mm in length, and are distinguished from common toads by a yellow line down the middle of the back and parallel paratoid glands. They have relatively short legs, which gives them a distinctive gait, contrasting with the hopping movement of many other toad species. Natterjacks have a very loud and distinctive mating call amplified by the single vocal sac found under the chin of the male. Life history Natterjacks live for up to 15 years, and feed mainly on insects, especially beetles. At night, they move around open terrain with sparse vegetation, and their tracks can often be seen in loose sand. They move considerable distances each night, enabling the species to colonize new habitats very quickly. Reproduction The natterjack toad spawns between the end of April and July, laying strings of eggs in shallow, warm pools. Because the natterjack toad is oft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fish
Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of living fish species are ray-finned fish, belonging to the class Actinopterygii, with around 99% of those being teleosts. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods. Mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drainage Basin
A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the '' drainage divide'', made up of a succession of elevated features, such as ridges and hills. A basin may consist of smaller basins that merge at river confluences, forming a hierarchical pattern. Other terms for a drainage basin are catchment area, catchment basin, drainage area, river basin, water basin, and impluvium. In North America, they are commonly called a watershed, though in other English-speaking places, "watershed" is used only in its original sense, that of a drainage divide. In a closed drainage basin, or endorheic basin, the water converges to a single point inside the basin, known as a sink, which may be a permanent lake, a dry lake, or a point where surface water is lost underground. Drainage basins are similar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alluvial Plain
An alluvial plain is a largely flat landform created by the deposition of sediment over a long period of time by one or more rivers coming from highland regions, from which alluvial soil forms. A floodplain is part of the process, being the smaller area over which the rivers flood at a particular period of time, whereas the alluvial plain is the larger area representing the region over which the floodplains have shifted over geological time. As the highlands erode due to weathering and water flow, the sediment from the hills is transported to the lower plain. Various creeks will carry the water further to a river, lake, bay, or ocean. As the sediments are deposited during flood conditions in the floodplain of a creek, the elevation of the floodplain will be raised. As this reduces the channel floodwater capacity, the creek will, over time, seek new, lower paths, forming a meander (a curving sinuous path). The leftover higher locations, typically natural levees at the margins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dredging
Dredging is the excavation of material from a water environment. Possible reasons for dredging include improving existing water features; reshaping land and water features to alter drainage, navigability, and commercial use; constructing dams, dikes, and other controls for streams and shorelines; and recovering valuable mineral deposits or marine life having commercial value. In all but a few situations the excavation is undertaken by a specialist floating plant, known as a dredger. Dredging is carried out in many different locations and for many different purposes, but the main objectives are usually to recover material of value or use, or to create a greater depth of water. Dredges have been classified as suction or mechanical. Dredging has significant environmental impacts: it can disturb marine sediments, leading to both short- and long-term water pollution, destroy important seabed ecosystems, and can release human-sourced toxins captured in the sediment. Description ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Matsalu Keemu Bird Tower
Matsalu (german: Matzal) is a village in Lääneranna Parish, Pärnu County in western Estonia, surrounding the old Matsalu Manor. The Estonian company which owns the manor house was managed from the late 1990s till the late 2010s by a Swedish American, C. J. Stefan Ridderstedt of Stockholm (1945-2020). in Postimees
''Postimees'' () is an Estonian daily newspaper established on 5 June 1857, by Johann Voldemar Jannsen. In 1891, it became the first daily newspaper in Estonia. Its current editor-in-chief is Priit Hõbemägi. The paper has approximately 250 ... 2007-01-13
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Per Mil
Per mille (from Latin , "in each thousand") is an expression that means parts per thousand. Other recognised spellings include per mil, per mill, permil, permill, or permille. The associated sign is written , which looks like a percent sign with an extra zero or o in the divisor. The term occurs so rarely in English that major dictionaries do not agree on the spelling and some major dictionaries such as '' Macmillan'' do not even contain an entry. The term is more common in other European languages where it is used to express fractions smaller than 1%. One common usage is blood alcohol content, which is usually expressed as a percentage in English-speaking countries. Per mille should not be confused with parts per million (ppm). Computer systems The code point for the glyph is included in the General Punctuation block of Unicode characters: .Unicode.General Punctuation. 2014. Accessed 5 Aug 2014. It may be typed using , , , or according to operating system. Note that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Salinity
Salinity () is the saltiness or amount of salt dissolved in a body of water, called saline water (see also soil salinity). It is usually measured in g/L or g/kg (grams of salt per liter/kilogram of water; the latter is dimensionless and equal to ‰). Salinity is an important factor in determining many aspects of the chemistry of natural waters and of biological processes within it, and is a thermodynamic state variable that, along with temperature and pressure, governs physical characteristics like the density and heat capacity of the water. A contour line of constant salinity is called an ''isohaline'', or sometimes ''isohale''. Definitions Salinity in rivers, lakes, and the ocean is conceptually simple, but technically challenging to define and measure precisely. Conceptually the salinity is the quantity of dissolved salt content of the water. Salts are compounds like sodium chloride, magnesium sulfate, potassium nitrate, and sodium bicarbonate which dissolve into ions. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brackish Water
Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuaries, or it may occur in brackish fossil aquifers. The word comes from the Middle Dutch root '' brak''. Certain human activities can produce brackish water, in particular civil engineering projects such as dikes and the flooding of coastal marshland to produce brackish water pools for freshwater prawn farming. Brackish water is also the primary waste product of the salinity gradient power process. Because brackish water is hostile to the growth of most terrestrial plant species, without appropriate management it is damaging to the environment (see article on shrimp farms). Technically, brackish water contains between 0.5 and 30 grams of salt per litre—more often expressed as 0.5 to 30 parts per thousand (‰), which is a specific gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Väinameri
The Väinameri ( Estonian for ''Strait Sea'' or ''Sea of Straits'') or Väinameri Sea is a strait and sub- bay of the Baltic Sea, located between the West Estonian Archipelago and the Estonian mainland, within western Estonia. It is the northern section of the Gulf of Riga, extending north to the eastern Baltic Sea. The area of the Väinameri Sea is about . The Väinameri Sea is home to the Väinameri Conservation area The Väinameri Conservation Area (Estonian: ''Väinamere hoiuala'') is a protected area in Estonia. The Väinameri Conservation Area was established in 2007 to protect the ''Väinameri Conservation Area'' and the surrounding coastal area. The .... References Gulf of Riga Straits of the Baltic Sea Straits of Estonia Saaremaa {{Latvia-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wooded Meadow
Wooded meadows (also named ''wood-meadows'', ''park meadows'', etc.) are ecosystems in temperate forest regions. They are sparse natural stands with a regularly mown herbaceous layer. While frequent throughout Europe during the Medieval period and before, wooded meadows have largely disappeared. Wooded meadows originated from the practices of hunter-gatherer communities. They were important in terms of social organization around a natural resource and determined much of the community's interactions with the natural world. In the early 20th century, wooded meadows were used for fruit cultivation in Sweden, however their prevalence has decreased substantially due to changes in land management and a movement toward more intensive types of agroecosystems. The more typical, calcicolous wooded meadows are common around the Baltic Sea. Wooded meadows have high species richness. In some of the current Estonian wooded meadows, world record species densities have been recorded (up to 76 s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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