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Margaritifera Margaritifera Durrovensis
The Nore pearl mussel (''Margaritifera durrovensis'') is a critically endangered species of freshwater pearl mussel, an aquatic bivalve mollusc in the family Margaritiferidae. The species is endemic to Ireland and was first identified by R.A. Phillips in 1926, who later declared it a new species in Volume 18 of the Proceedings of the Malacological Society. This designation was controversial, and the taxonomic status of the Nore pearl mussel remains inconclusive. It is often described as a rare ecophenotype of ''M. margaritifera''. The European Union's Habitats Directive on the conservation of natural habitats and wild fauna placed ''Margaritifera durrovensis'' on Annex II and Annex V as a separate taxon. Distribution The species is native to the Three Sisters - the rivers Barrow, Suir and Nore, the latter of which being the mussel's namesake. However, specimens have not been found outside of the River Nore since 1993. Unlike ''M. margaritifera'', which can tolerate acidic co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Molluscan Studies
The ''Journal of Molluscan Studies'' is the peer-reviewed scientific journal of the Malacological Society of London, covering research in malacology.About the journal accessed 6 December 2010. Previous names of this journal include ''Proceedings of the Malacological Society'', and ''Proceedings of the Malacological Society of London'' (abbreviated as ''Proc. Malacol. Soc. Lond.''). Abstracting and indexing The journal is abstracted and indexed by ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Three Sisters (Ireland)
The Three Sisters ( ga, An Triúr Deirfiúr) are three rivers in Ireland: the River Barrow, the River Nore and the River Suir. The Suir and Nore rise in the same mountainous area in County Tipperary, near the Devil's Bit, while the Barrow rises in the Slieve Bloom Mountains in County Laois. The Nore flows into the Barrow about 17 km before the Suir and Barrow join to form an estuary called Waterford Harbour east of the city of Waterford. The rivers fan out to drain a large portion of the southern part of the island, including Counties Tipperary, Carlow, Kilkenny, Wexford and Waterford, among others. The lengths of the three rivers of the Three Sisters are the Barrow - 192 km (119 mi), the Suir - 185 km (115 mi) and the Nore - 140 km (87 mi). The combined catchment area of the Three Sisters is 9,207 km2, made up of the Suir's (3,610 km2), the Barrow's (3,067 km2) and the Nore's (2,530 km2).South Eastern River Basin Distric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bivalves Described In 1928
Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bivalves have no head and they lack some usual molluscan organs, like the radula and the odontophore. They include the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as the scallops and file shells, can swim. The shipworms bore into wood, clay, or stone and live inside these substances. The shell of a bivalve is composed of calcium c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Bivalves
Freshwater bivalves are one kind of freshwater mollusc, along with freshwater snails. They are bivalves that live in fresh water as opposed to salt water, which is the main habitat type for bivalves. The majority of species of bivalve molluscs live in the sea, but in addition, a number of different families live in fresh water (and in some cases, also in brackish water). These families belong to two different evolutionary lineages (freshwater mussels and freshwater clams), and the two groups are not closely related. Freshwater bivalves have a simple morphology that varies among taxa, and are distributed around most regions of the world. Species in the two groups vary greatly in size. Some pea clams (''Pisidium'' species) have an adult size of only 3 mm. In contrast, one of the largest species of freshwater bivalves is the swan mussel, in the family Unionidae; it can grow to a length of 20 cm, and usually lives in lakes or slow rivers. Freshwater pearl mussels are econo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Margaritifera
''Margaritifera'' is a genus of freshwater mussels, Aquatic animal, aquatic bivalve molluscs in the family Margaritiferidae, the freshwater pearl mussels. MolluscaBase eds. (2021). MolluscaBase. Margaritifera Schumacher, 1815. Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=571966 on 2021-06-22 Species Species within the genus ''Margaritifera'' include: * ''Margaritifera auricularia'' or ''Pseudunio auricularia'' * ''Margaritifera falcata'' (Augustus Addison Gould, Gould, 1850) * ''Margaritifera hembeli'' (Conrad, 1838) * ''Margaritifera margaritifera'' (Carl Linnaeus, Linnaeus, 10th edition of Systema Naturae, 1758) — Freshwater pearl mussel (includes ''Margaritifera margaritifera durrovensis'' Phillips, 1928) * ''Margaritifera marrianae'' R. I. Johnson, 1983 The following fossil species are known from the mid-Cretaceous of Mongolia, being formerly classified in the genus ''Unio (bivalve), Unio'': * †''Margaritifera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Parks And Wildlife Service (Ireland)
The National Parks and Wildlife Service () manages the Irish State's nature conservation responsibilities. As well as managing the national parks, the activities of the NPWS include the designation and protection of Natural Heritage Areas, Special Areas of Conservation and Special Protection Areas. History The Service was established as part of the Department of the Environment, Heritage and Local Government after the abolition of Dúchas in 2003. Dúchas's responsibilities had included the management of Ireland's six national parks and wildlife. In 2011 built and natural heritage came into the remit of the Department of Arts, Heritage and the Gaeltacht as part of a reorganisation of Irish departments. It was transferred again in 2020 to the Department of Housing, Local Government and Heritage The Department of Housing, Local Government and Heritage ( ga, An Roinn Tithíochta, Rialtais Áitiúil agus Oidhreachta) is a department of the Government of Ireland. It is led by the M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intensive Farming
Intensive agriculture, also known as intensive farming (as opposed to extensive farming), conventional, or industrial agriculture, is a type of agriculture, both of crop plants and of animals, with higher levels of input and output per unit of agricultural land area. It is characterized by a low fallow ratio, higher use of inputs such as capital and labour, and higher crop yields per unit land area. Most commercial agriculture is intensive in one or more ways. Forms that rely heavily on industrial methods are often called industrial agriculture, which is characterised by innovations designed to increase yield. Techniques include planting multiple crops per year, reducing the frequency of fallow years, and improving cultivars. It also involves increased use of fertilizers, plant growth regulators, pesticides, antibiotics for livestock and mechanised agriculture, controlled by increased and more detailed analysis of growing conditions, including weather, soil, water, weeds, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcareous
Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines. In zoology ''Calcareous'' is used as an adjectival term applied to anatomical structures which are made primarily of calcium carbonate, in animals such as gastropods, i.e., snails, specifically about such structures as the operculum, the clausilium, and the love dart. The term also applies to the calcium carbonate tests of often more or less microscopic Foraminifera. Not all tests are calcareous; diatoms and radiolaria have siliceous tests. The molluscs are calcareous, as are calcareous sponges ( Porifera), that have spicules which are made of calcium carbonate. In botany ''Calcareous grassland'' is a form of grassland characteristic of soils containing much calcium carbonate from underlying chalk or limestone rock. In medicine The term is used in pathology, for example i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Nore
The River Nore ( ga, An Fheoir ) is one of the principal rivers (along with the River Suir and River Barrow) in the South-East Region of Ireland. The river drains approximately of Leinster and Munster, that encompasses parts of three counties (Tipperary, Laois, Kilkenny). Along with the River Suir and River Barrow, it is one of the constituent rivers of the group known as the Three Sisters. Starting in the Devil's Bit Mountain, County Tipperary, the river flows generally southeast, and then south, before its confluence with the River Barrow at Ringwood, and the Barrow railway bridge at Drumdowney, County Kilkenny, which empties into the Celtic Sea at Waterford Harbour, Waterford. The long term average flow rate of the River Nore is 42.9 cubic metres per second (m3/s) The river is home to the only known extant population of the critically endangered Nore freshwater pearl mussel, and much of its length is listed as a Special Area of Conservation.River Barrow and River Nore ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Suir
The River Suir ( ; ga, an tSiúr or ''Abhainn na Siúire'' ) is a river in Ireland that flows into the Atlantic Ocean through Waterford after a distance of . The catchment area of the Suir is 3,610 km2.South Eastern River Basin District Management System. Page 38 Its long term average flow rate is 76.9 cubic metres per second (m3/s), about twice the flow of either the (37.4 m3/s) or the (42.9 m3/s) before these join, but a little less than the Barrow's ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Barrow
The Barrow ( ga, An Bhearú) is a river in Ireland. It is one of The Three Sisters; the other two being the River Suir and the River Nore. The Barrow is the longest of the three rivers, and at 192 km (120 mi), the second-longest river in Ireland, behind the River Shannon. The catchment area of the River Barrow is 3,067 km2 before River Nore joins it a little over 20 km before its mouth.South Eastern River Basin District Management System. Page 38 The river's long term average flow rate, again before it is joined by River Nore, is 37.4 cubic metres per second. At the merger with the River Suir, its catchment area is ca. 5,500 km2 and its discharge over 80 m3/s. Cours ...
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