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Oxyloma Patentissima
''Oxyloma patentissima'' is a species of land snail, a terrestrial pulmonate gastropod mollusk in the family Succineidae, the amber snails. van Bruggen A. C. & Appleton C. C. (1977). "Studies on the ecology and systematics of the terrestrial molluscs of the lake Sibaya area of Zululand, South Africa". ''Zoologische Verhandelingen'' 154: 3-48. page 21-23PDF Distribution The distribution of ''Oxyloma patentissima'' includes: * Lake Chad * Angola * Botswana * Zimbabwe, lake Chivero * southern Mozambique * South AfricaOberholzer G. & Van Eeden J. A. (1967). "The freshwater molluscs of the Kruger National Park". ''Koedoe - African Protected Area Conservation and Science'' 10(1): 1-42. PDF page 26, Fig. 20. Description The width of the shell is 5.1-5.3 mm; the height of the shell is 8.9-10.4 mm. Ecology ''Oxyloma patentissima'' lives only in very wet habitats. It is an amphibious species living around freshwater habitats such as streams and lakes, and also in mangroves. This ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gastropod Shell
The gastropod shell is part of the body of a Gastropoda, gastropod or snail, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the Aperture (mollusc), aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group. Shell layers The gastropod shell has three major layers secreted by the Mantle (mollusc), mantle. The calcareous central layer, tracum, is typically made of calcium carbonate precipitated into an organic matrix known as c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Non-marine Molluscs Of Zimbabwe
The list of non-marine molluscs of Zimbabwe is a list of freshwater and land species that form a part of the molluscan fauna of Zimbabwe (wildlife of Zimbabwe). Freshwater gastropods Ampullariidae * ''Lanistes ovum'' Peters, 1845 Viviparidae * '' Bellamya capillata'' (Frauenfeld, 1865) Thiaridae * ''Melanoides tuberculata'' (O. F. Müller, 1774) Planorbidae * ''Biomphalaria pfeifferi'' (Krauss, 1848) * ''Bulinus forskalii'' (Ehrenberg, 1831)G. Chingwena, S. Mukaratirwa, M. Chimbari, T. K. Kristensen & H. Madsen (2004). "Population dynamics and ecology of freshwater gastropods in the highveld and lowveld regions of Zimbabwe, with emphasis on schistosome and amphistome intermediate hosts". African Zoology 39(1): 55-62. * ''Bulinus globosus'' (Morelet, 1866) * ''Bulinus tropicus'' (Krauss, 1848) * ''Bulinus truncatus'' (Audouin, 1827) * '' Ceratophallus natalensis'' (F. Krauss, 1848) * '' Gyraulus costulatus'' (Krauss, 1848) * ''Physella acuta'' (Draparnaud, 1805) * ''Planorb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Snail
Freshwater snails are gastropod mollusks which live in fresh water. There are many different families. They are found throughout the world in various habitats, ranging from ephemeral pools to the largest lakes, and from small seeps and springs to major rivers. The great majority of freshwater gastropods have a shell, with very few exceptions. Some groups of snails that live in freshwater respire using gills, whereas other groups need to reach the surface to breathe air. In addition, some are amphibious and have both gills and a lung (e.g. ''Ampullariidae''). Most feed on algae, but many are detritivores and some are filter feeders. According to a 2008 review of the taxonomy, there are about 4,000 species of freshwater gastropods (3,795–3,972). At least 33–38 independent lineages of gastropods have successfully colonized freshwater environments. It is not possible to quantify the exact number of these lineages yet, because they have yet to be clarified within the Cerit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mangroves
A mangrove is a shrub or tree that grows in coastal saline or brackish water. The term is also used for tropical coastal vegetation consisting of such species. Mangroves are taxonomically diverse, as a result of convergent evolution in several plant families. They occur worldwide in the tropics and subtropics and even some temperate coastal areas, mainly between latitudes 30° N and 30° S, with the greatest mangrove area within 5° of the equator. Mangrove plant families first appeared during the Late Cretaceous to Paleocene epochs, and became widely distributed in part due to the movement of tectonic plates. The oldest known fossils of mangrove palm date to 75 million years ago. Mangroves are salt-tolerant trees, also called halophytes, and are adapted to live in harsh coastal conditions. They contain a complex salt filtration system and a complex root system to cope with saltwater immersion and wave action. They are adapted to the low-oxygen conditions of water ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Koedoe - African Protected Area Conservation And Science
''Koedoe'', subtitled ''African Protected Area Conservation and Science'', is a peer-reviewed open access scientific journal covering biology, ecology, and biodiversity conservation in Africa. It was established in 1958. Koedoe is Afrikaans for Kudu The kudus are two species of antelope of the genus '' Tragelaphus'': * Lesser kudu, ''Tragelaphus imberbis'', of eastern Africa * Greater kudu, ''Tragelaphus strepsiceros'', of eastern and southern Africa The two species look similar, th .... Abstracting and indexing For full information visit the journal website link http://koedoe.co.za/index.php/koedoe/pages/view/about#7 External links * Publications established in 1958 English-language journals Open access journals Ecology journals Conservation biology {{ecology-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Non-marine Molluscs Of South Africa
The list of non-marine molluscs of South Africa is a list of freshwater and land species that form a part of the molluscan fauna of South Africa. Freshwater gastropods Ampullariidae * ''Lanistes ovum'' Troschel, 1845 Pomatiopsidae * '' Tomichia cawstoni'' Connolly, 1939 – endemic * '' Tomichia natalensis'' Connolly, 1939 – endemic * '' Tomichia rogersi'' (Connolly, 1929) – endemic Thiaridae * ''Tarebia granifera'' (Lamarck, 1822) – non-indigenousAppleton C. C., Forbes A. T.& Demetriades N. T. (2009). "The occurrence, bionomics and potential impacts of the invasive freshwater snail ''Tarebia granifera'' (Lamarck, 1822) (Gastropoda: Thiaridae) in South Africa". ''Zoologische Mededelingen'' 83. http://www.zoologischemededelingen.nl/83/nr03/a04 * '' Thiara amarula'' (Linnaeus, 1758) * ''Melanoides tuberculata'' (O. F. Müller, 1774) Paludomidae * '' Cleopatra ferruginea'' (Lea & Lea, 1850) Lymnaeidae * ''Pseudosuccinea columella'' (Say, 1817) – non-indigenous * ''Ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Non-marine Molluscs Of Mozambique
The list of non-marine molluscs of Mozambique is a list of freshwater and land species that form a part of the molluscan fauna of Mozambique (wildlife of Mozambique). The terrestrial malacofauna of Mozambique is underreported and under-collected. As a result, on the whole exact data are scarce. For example, there are known 46 species of terrestrial gastropods from Cabo Delgado Province, north-eastern corner of Mozambique, 28 species of terrestrial gastropods from Gorongosa National Park including its surroundings. Freshwater gastropods Neritidae * ''Neritina natalensis'' Reeve, 1855 Paludomidae * '' Cleopatra ferruginea'' (I. & H. C. Lea, 1850) * '' Cleopatra hemmingi'' (Verdcourt, 1956) * '' Cleopatra nsendweensis'' Dupuis & Putzeys, 1902 – uncertain presence Viviparidae * '' Bellamya capillata'' (Frauenfeld, 1865) * ''Bellamya jeffreysi'' (Frauenfeld, 1865) * '' Bellamya robertsoni'' Frauenfeld, 1865 Bithyniidae * ''Gabbiella kisalensis'' (Pilsbry & Bequaert, 1927) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arch
An arch is a vertical curved structure that spans an elevated space and may or may not support the weight above it, or in case of a horizontal arch like an arch dam, the hydrostatic pressure against it. Arches may be synonymous with vaults, but a vault may be distinguished as a continuous arch forming a roof. Arches appeared as early as the 2nd millennium BC in Mesopotamian brick architecture, and their systematic use started with the ancient Romans, who were the first to apply the technique to a wide range of structures. Basic concepts An arch is a pure compression form. It can span a large area by resolving forces into compressive stresses, and thereby eliminating tensile stresses. This is sometimes denominated "arch action". As the forces in the arch are transferred to its base, the arch pushes outward at its base, denominated "thrust". As the rise, i. e. height, of the arch decreases the outward thrust increases. In order to preserve arch action and prevent collapse ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eichhornia Crassipes
''Pontederia crassipes'' (formerly ''Eichhornia crassipes''), commonly known as common water hyacinth is an aquatic plant native to South America, naturalized throughout the world, and often invasive species, invasive outside its native range.''Pontederia crassipes'' Kew Royal Botanic Gardens Plants of the World Online. Accessed April 19, 2022.''Eichhornia crassipes'' Kew Royal Botanic Gardens Plants of the World Online. Accessed April 19, 2022. June 15, 2016. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Chivero
Lake Chivero is a reservoir on the Manyame River in Zimbabwe. It was formerly called Lake McIlwaine in memory of Sir Robert McIlwaine, a former judge of the High Court and founder of Southern Rhodesia's (later Rhodesia's, now Zimbabwe's) soil and water conservation movement. Located southwest of Harare, it provides the main water supply for the city. The lake was constructed over two-and-a-half years and opened to the public in 1952. The dam wall is 400 metres long. The water is also used for irrigation purposes and commercial fishing. Some of the fishes that are found in the lake include common grass carp, tigerfish, black bream, Clarias gariepinus, yellowfish, and green-headed bream. The lake and hinterland are protected as part of Lake Chivero Recreational Park. The lake was designated a Ramsar wetland of international importance on 3 January 2013. Remembrance Island is a small island in the reservoir. See also *Lake Chivero Recreational Park Lake Chivero Recreational Park ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Chad
Lake Chad (french: Lac Tchad) is a historically large, shallow, endorheic lake in Central Africa, which has varied in size over the centuries. According to the ''Global Resource Information Database'' of the United Nations Environment Programme, it shrank by as much as 95% from about 1963 to 1998. The lowest area was in 1986, at , but "the 2007 (satellite) image shows significant improvement over previous years." Lake Chad is economically important, providing water to more than 30 million people living in the four countries surrounding it ( Chad, Cameroon, Niger, and Nigeria) on the central part of the Sahel. It is the largest lake in the Chad Basin. Geography and hydrology The freshwater lake is located in the Sahelian zone of West-central Africa. It is located in the interior basin which used to be occupied by a much larger ancient sea sometimes called Mega Chad. The lake is historically ranked as one of the largest lakes in Africa. Its surface area varies by season as well ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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