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Invasive Species In The British Isles
Islands, such as the British Isles, can be adversely affected by the introduction of non-native species. Often an island will have several distinct species not present on the nearest mainland, and vice versa. The native flora and fauna of islands which have been isolated for a longer period of time such as New Zealand or Hawaii (which have been isolated for millions of years) are more vulnerable than islands such as Great Britain and Ireland, which became isolated more recently (8,000 years ago at the end of the Last Glacial Period). Many species have been introduced to Britain during historical times. Some species such as the midwife toad (''Alytes''), rainbow trout (''Oncorhynchus mykiss''), sweet chestnut ('' Castanea sativa'') and horseradish (''Armoracia rusticana'') have been introduced with few adverse consequences. However, others such as the grey squirrel (''Sciurus carolinensis''), signal crayfish (''Pacifastacus leniusculus''), and Japanese knotweed (''Fallopia japo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gray Squirrel (Sciurus Carolinensis) In Boston Public Garden September 2010
Gray squirrel or grey squirrel may refer to several species of squirrel indigenous to North America: *The eastern gray squirrel (''Sciurus carolinensis''), from the eastern United States and southeastern Canada; introduced into the United Kingdom, Ireland, western North America, Italy, and South Africa *The western gray squirrel (''Sciurus griseus''), from the western United States *The Arizona gray squirrel (''Sciurus arizonensis''), from the southwestern United States and adjacent Mexico *The Mexican gray squirrel The Mexican gray squirrel (or red-bellied squirrel) (''Sciurus aureogaster'') is a tree squirrel in the genus ''Sciurus'' native to Guatemala and eastern and southern Mexico. It has been introduced to the Florida Keys. The alternate name should ... (''Sciurus aureogaster''), from southern Mexico and Guatemala; introduced into the Florida Keys {{Animal common name Sciurus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rose-ringed Parakeet
The rose-ringed parakeet (''Psittacula krameri''), also known as the ring-necked parakeet (more commonly known as the Indian ringneck parrot), is a medium-sized parrot in the genus Psittacula, of the family Psittacidae. It has disjunct native ranges in Africa and the Indian Subcontinent, and is now introduced into many other parts of the world where feral populations have established themselves and are bred for the exotic pet trade. One of the few parrot species that have successfully adapted to living in disturbed habitats, it has withstood the onslaught of urbanisation and deforestation. As a popular pet species, escaped birds have colonised a number of cities around the world, including populations in Northern and Western Europe. These parakeets have also proven themselves capable of living in a variety of climates outside their native range, and are able to survive low winter temperatures in Northern Europe. The species is listed as least concern by the International Union fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norfolk
Norfolk () is a ceremonial and non-metropolitan county in East Anglia in England. It borders Lincolnshire to the north-west, Cambridgeshire to the west and south-west, and Suffolk to the south. Its northern and eastern boundaries are the North Sea, with The Wash to the north-west. The county town is the city of Norwich. With an area of and a population of 859,400, Norfolk is a largely rural county with a population density of 401 per square mile (155 per km2). Of the county's population, 40% live in four major built up areas: Norwich (213,000), Great Yarmouth (63,000), King's Lynn (46,000) and Thetford (25,000). The Broads is a network of rivers and lakes in the east of the county, extending south into Suffolk. The area is protected by the Broads Authority and has similar status to a national park. History The area that was to become Norfolk was settled in pre-Roman times, (there were Palaeolithic settlers as early as 950,000 years ago) with camps along the highe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Devon
Devon ( , historically known as Devonshire , ) is a ceremonial and non-metropolitan county in South West England. The most populous settlement in Devon is the city of Plymouth, followed by Devon's county town, the city of Exeter. Devon is a coastal county with cliffs and sandy beaches. Home to the largest open space in southern England, Dartmoor (), the county is predominately rural and has a relatively low population density for an English county. The county is bordered by Somerset to the north east, Dorset to the east, and Cornwall to the west. The county is split into the non-metropolitan districts of East Devon, Mid Devon, North Devon, South Hams, Teignbridge, Torridge, West Devon, Exeter, and the unitary authority areas of Plymouth, and Torbay. Combined as a ceremonial county, Devon's area is and its population is about 1.2 million. Devon derives its name from Dumnonia (the shift from ''m'' to ''v'' is a typical Celtic consonant shift). During the Briti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hampshire
Hampshire (, ; abbreviated to Hants) is a ceremonial county, ceremonial and non-metropolitan county, non-metropolitan counties of England, county in western South East England on the coast of the English Channel. Home to two major English cities on its south coast, Southampton and Portsmouth, Hampshire is the 9th-most populous county in England. The county town of Hampshire is Winchester, located in the north of the county. The county is bordered by Dorset to the south-west, Wiltshire to the north-west, Berkshire to the north, Surrey to the north-east, and West Sussex to the south east. The county is geographically diverse, with upland rising to and mostly south-flowing rivers. There are areas of downland and marsh, and two national parks: the New Forest National Park, New Forest and part of the South Downs National Park, South Downs, which together cover 45 per cent of Hampshire. Settled about 14,000 years ago, Hampshire's recorded history dates to Roman Britain, when its chi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sussex
Sussex (), from the Old English (), is a historic county in South East England that was formerly an independent medieval Anglo-Saxon kingdom. It is bounded to the west by Hampshire, north by Surrey, northeast by Kent, south by the English Channel, and divided for many purposes into the ceremonial counties of West Sussex and East Sussex. Brighton and Hove, though part of East Sussex, was made a unitary authority in 1997, and as such, is administered independently of the rest of East Sussex. Brighton and Hove was granted city status in 2000. Until then, Chichester was Sussex's only city. The Brighton and Hove built-up area is the 15th largest conurbation in the UK and Brighton and Hove is the most populous city or town in Sussex. Crawley, Worthing and Eastbourne are major towns, each with a population over 100,000. Sussex has three main geographic sub-regions, each oriented approximately east to west. In the southwest is the fertile and densely populated coastal plain. Nort ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coypu
The nutria (''Myocastor coypus''), also known as the coypu, is a large, herbivorous, semiaquatic rodent. Classified for a long time as the only member of the family Myocastoridae, ''Myocastor'' is now included within Echimyidae, the family of the spiny rats. The nutria lives in burrows alongside stretches of water, and feeds on river plant stems. Originally native to subtropical and temperate South America, it has since been introduced to North America, Europe, Asia, and Africa, primarily by fur farmers. Although it is still hunted and trapped for its fur in some regions, its destructive burrowing and feeding habits often bring it into conflict with humans, and it is considered an invasive species. Nutria also transmit various diseases to humans and animals mainly through water contamination. Etymology The genus name ''Myocastor'' derives from the two Ancient Greek words (), meaning "rat, mouse", and (), meaning "beaver". Literally, therefore, the name ''Myocastor'' means ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crayfish Plague
Crayfish plague (''Aphanomyces astaci'') is a water mold that infects crayfish, most notably the European ''Astacus'' which dies within a few weeks of being infected. When experimentally tested, species from Australia, New Guinea and Japan were also found to be susceptible to the infection. History Crayfish plague first arrived in Europe in Italy in 1859, either with imported crayfish from North America, or in ballast water discharge. After its original introduction in Italy in 1860, it spread quickly through Europe and was discovered in Sweden in 1907, in Spain in 1972, in Norway in 1971, in Great Britain in 1981, in Turkey in 1984 and in Ireland in 1987. In 1959, to bolster dwindling stocks of native crayfish, the signal crayfish was introduced to Sweden. The signal crayfish was known to be resistant, and it was not recognised at that time that it was a carrier of the disease. After 150 years of contact, no resistance has been discovered in native European crayfish. This spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squirrel Pox
''Squirrelpox virus (SQPV)'' is a virus that causes the fatal disease squirrelpox in United Kingdom red squirrels. The virus is often carried by grey squirrels from North America, which rarely die from the disease. Elsewhere in the Red Squirrel's European range, either the grey squirrel does not occur or it lacks the poxvirus. Overview Grey squirrels very rarely die from this disease as their population has developed immunity having been exposed to the virus for many years; however, they are still carriers of the infection and can spread the disease to red squirrels. In sharp contrast, there are no known red squirrels that have developed immunity to the disease, and the mortality rate for untreated infected squirrels in the wild appears to be 100%, most dying within 4–5 days of being infected. There has been some more recent anecdotal evidence on resistance to Squirrel pox in the red population including the finding of a healthy red squirrel with antibodies to the virus in Cum ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kingston Parakeets
Feral parakeets in Great Britain are feral parakeets, wild-living, non-native parakeets that are an introduced species into Great Britain. The population mainly consists of rose-ringed parakeet, ring-necked parakeets (''Psittacula krameri''), a non-migratory species of bird native to Africa and the Indian Subcontinent, with a few, small breeding populations of Monk parakeet#UK_feral_Monk_parakeet_anchor, monk parakeets, and other occasional escaped cage birds. The origins of these birds are subject of speculation, but they are generally thought to have bred from birds that escaped from captivity or were released. The British rose-ringed parakeet or ring-necked parakeet population is mostly concentrated in suburban areas of London and the Home Counties of South-East England, and for this reason the birds are sometimes known as "Kingston parakeets" or "Twickenham parakeets", after the London suburbs of Kingston upon Thames and Twickenham. The parakeets breed rapidly and have spread ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Berkshire
Berkshire ( ; in the 17th century sometimes spelt phonetically as Barkeshire; abbreviated Berks.) is a historic county in South East England. One of the home counties, Berkshire was recognised by Queen Elizabeth II as the Royal County of Berkshire in 1957 because of the presence of Windsor Castle, and letters patent were issued in 1974. Berkshire is a county of historic origin, a ceremonial county and a non-metropolitan county without a county council. The county town is Reading. The River Thames formed the historic northern boundary, from Buscot in the west to Old Windsor in the east. The historic county, therefore, includes territory that is now administered by the Vale of White Horse and parts of South Oxfordshire in Oxfordshire, but excludes Caversham, Slough and five less populous settlements in the east of the Royal Borough of Windsor and Maidenhead. All the changes mentioned, apart from the change to Caversham, took place in 1974. The towns of Abingdon, Didcot, Far ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Surrey
Surrey () is a ceremonial and non-metropolitan county in South East England, bordering Greater London to the south west. Surrey has a large rural area, and several significant urban areas which form part of the Greater London Built-up Area. With a population of approximately 1.2 million people, Surrey is the 12th-most populous county in England. The most populated town in Surrey is Woking, followed by Guildford. The county is divided into eleven districts with borough status. Between 1893 and 2020, Surrey County Council was headquartered at County Hall, Kingston-upon-Thames (now part of Greater London) but is now based at Woodhatch Place, Reigate. In the 20th century several alterations were made to Surrey's borders, with territory ceded to Greater London upon its creation and some gained from the abolition of Middlesex. Surrey is bordered by Greater London to the north east, Kent to the east, Berkshire to the north west, West Sussex to the south, East Sussex to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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