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Laohu Valley
The Laohu Valley Reserve (LVR) is a nature reserve located near Philippolis in the Free State and near Vanderkloof Dam in the Northern Cape of South Africa. It is a roughly 350-square-kilometre private reserve. It has been created with the aims of nurturing captive-born South China tigers (''Panthera tigris tigris'') in South Africa and eventually releasing them into the wild in China, making it the only reserve in Africa to have wild, free-roaming tigers. It is also aimed to restore South African biodiversity in the parts of the reserve not populated by tigers. History The Laohu Valley Reserve was created in 2002 out of 17 defunct sheep farms, and efforts to return the overgrazed land to natural status are ongoing. The South China tigers at LVR for rewinding are kept confined to a tiger-proof camp complex of roughly 1.8 square kilometers, with other areas of the reserve being used to protect native South African species. The word "laohu" is a Chinese term for tiger. Wildlife c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South China Tiger
The South China tiger is a population of the '' Panthera tigris tigris'' subspecies that is native to southern China. The population mainly inhabited the Fujian, Guangdong, Hunan and Jiangxi provinces. It has been listed as Critically Endangered on the China's Red List of Vertebrates and is possibly extinct in the wild since no wild individual has been recorded since the late 1980s. In the late 1990s, continued survival was considered unlikely because of low prey density, widespread habitat degradation and fragmentation, and other human pressures. In the fur trade, it used to be called Amoy tiger. Taxonomy The scientific name ''Felis tigris'' var. ''amoyensis'' was proposed by Max Hilzheimer in 1905 who described five tiger skulls from Hankou in southern China that differed slightly in shape from Bengal tiger skulls. Analysis of South China tiger skulls showed that they differ in shape from tiger skulls of other regions. Because of this phenomenon the South China t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecosystem
An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Energy enters the system through photosynthesis and is incorporated into plant tissue. By feeding on plants and on one another, animals play an important role in the movement of matter and energy through the system. They also influence the quantity of plant and microbial biomass present. By breaking down dead organic matter, decomposers release carbon back to the atmosphere and facilitate nutrient cycling by converting nutrients stored in dead biomass back to a form that can be readily used by plants and microbes. Ecosystems are controlled by external and internal factors. External factors such as climate, parent material which forms the soil and topography, control the overall structure of an ecosystem but are not themselves influenced by the ecosyst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Woodland
A woodland () is, in the broad sense, land covered with trees, or in a narrow sense, synonymous with wood (or in the U.S., the '' plurale tantum'' woods), a low-density forest forming open habitats with plenty of sunlight and limited shade (see differences between British, American, and Australian English explained below). Woodlands may support an understory of shrubs and herbaceous plants including grasses. Woodland may form a transition to shrubland under drier conditions or during early stages of primary or secondary succession. Higher-density areas of trees with a largely closed canopy that provides extensive and nearly continuous shade are often referred to as forests. Extensive efforts by conservationist groups have been made to preserve woodlands from urbanization and agriculture. For example, the woodlands of Northwest Indiana have been preserved as part of the Indiana Dunes. Definitions United Kingdom ''Woodland'' is used in British woodland management t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acacia Karoo
''Vachellia karroo'', commonly known as the sweet thorn, common acacia, Karoo thorn, Cape gum or cockspur thorn, is a species of ''Vachellia'', native to southern Africa from southern Angola east to Mozambique, and south to South Africa. It is a shrub or small to medium-sized tree which grows to height of 12m. It is difficult to tell apart from ''Vachellia nilotica'' subsp. ''adstringens'' without examining the seed pods. The Botanical Society of South Africa has accepted a name change to ''Vachellia karroo''. Common names in various languages include ''doringboom'', ''soetdoring'', ''cassie'', ''piquants blancs'', ''cassie piquants blancs'', ''deo-babool'', ''doorn boom'', ''kaludai'', ''kikar'', ''mormati'', ''pahari kikar'', ''umga'' and ''udai vel''. Identification It is a shrub or small to medium-sized tree which grows to height of 12m. ''Vachellia karroo'' has a rounded crown, branching fairly low down on the trunk. It is variable in shape and size, reaching a maxim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shrub
A shrub (often also called a bush) is a small-to-medium-sized perennial woody plant. Unlike herbaceous plants, shrubs have persistent woody stems above the ground. Shrubs can be either deciduous or evergreen. They are distinguished from trees by their multiple stems and shorter height, less than tall. Small shrubs, less than 2 m (6.6 ft) tall are sometimes termed as subshrubs. Many botanical groups have species that are shrubs, and others that are trees and herbaceous plants instead. Some definitions state that a shrub is less than and a tree is over 6 m. Others use as the cut-off point for classification. Many species of tree may not reach this mature height because of hostile less than ideal growing conditions, and resemble a shrub-sized plant. However, such species have the potential to grow taller under the ideal growing conditions for that plant. In terms of longevity, most shrubs fit in a class between perennials and trees; some may only last about fiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolerite
Diabase (), also called dolerite () or microgabbro, is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine-grained to aphanitic chilled margins which may contain tachylite (dark mafic glass). ''Diabase'' is the preferred name in North America, while ''dolerite'' is the preferred name in the rest of the English-speaking world, where sometimes the name ''diabase'' refers to altered dolerites and basalts. Some geologists prefer to avoid confusion by using the name ''microgabbro''. The name ''diabase'' comes from the French ', and ultimately from the Greek - meaning "act of crossing over, transition". Petrography Diabase normally has a fine but visible texture of euhedral lath-shaped plagioclase crystals (62%) set in a finer matrix of clinopyroxene, typically augite (20–29%), with minor olivine (3% up to 12% in olivine diabase), magnetite (2%), and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karoo
The Karoo ( ; from the Afrikaans borrowing of the South Khoekhoe !Orakobab or Khoemana word ''ǃ’Aukarob'' "Hardveld") is a semi- desert natural region of South Africa. No exact definition of what constitutes the Karoo is available, so its extent is also not precisely defined. The Karoo is partly defined by its topography, geology and climate, and above all, its low rainfall, arid air, cloudless skies, and extremes of heat and cold.Potgieter, D.J. & du Plessis, T.C. (1972) ''Standard Encyclopaedia of Southern Africa''. Vol. 6. pp. 306–307. Nasou, Cape Town.''Reader’s Digest Illustrated Guide to Southern Africa''. (5th Ed. 1993). pp. 78–89. Reader’s Digest Association of South Africa Pty. Ltd., Cape Town. The Karoo also hosted a well-preserved ecosystem hundreds of million years ago which is now represented by many fossils. The ǃ’Aukarob formed an almost impenetrable barrier to the interior from Cape Town, and the early adventurers, explorers, hunters, and traveler ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grassland
A grassland is an area where the vegetation is dominated by grasses (Poaceae). However, sedge (Cyperaceae) and rush ( Juncaceae) can also be found along with variable proportions of legumes, like clover, and other herbs. Grasslands occur naturally on all continents except Antarctica and are found in most ecoregions of the Earth. Furthermore, grasslands are one of the largest biomes on earth and dominate the landscape worldwide. There are different types of grasslands: natural grasslands, semi-natural grasslands, and agricultural grasslands. They cover 31–69% of the Earth's land area. Definitions Included among the variety of definitions for grasslands are: * "...any plant community, including harvested forages, in which grasses and/or legumes make up the dominant vegetation." * "...terrestrial ecosystems dominated by herbaceous and shrub vegetation, and maintained by fire, grazing, drought and/or freezing temperatures." (Pilot Assessment of Global Ecosystems, 2000) * " ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rainfall
Rain is water droplets that have condensed from atmospheric water vapor and then fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. It provides water for hydroelectric power plants, crop irrigation, and suitable conditions for many types of ecosystems. The major cause of rain production is moisture moving along three-dimensional zones of temperature and moisture contrasts known as weather fronts. If enough moisture and upward motion is present, precipitation falls from convective clouds (those with strong upward vertical motion) such as cumulonimbus (thunder clouds) which can organize into narrow rainbands. In mountainous areas, heavy precipitation is possible where upslope flow is maximized within windward sides of the terrain at elevation which forces moist air to condense and fall out as rainfall along the sides of mountains. On the leeward side of mountains, desert climates ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madonna In Snow
Madonna Louise Ciccone (; ; born August 16, 1958) is an American singer-songwriter and actress. Widely dubbed the " Queen of Pop", Madonna has been noted for her continual reinvention and versatility in music production, songwriting, and visual presentation. She has pushed the boundaries of artistic expression in mainstream music, while continuing to maintain control over every aspect of her career. Her works, which incorporate social, political, sexual, and religious themes, have generated both controversy and critical acclaim. A prominent cultural figure crossing both the 20th and 21st centuries, Madonna remains one of the most "well-documented figures of the modern age", with a broad amount of scholarly reviews and literature works on her, as well as an academic mini subdiscipline devoted to her named Madonna studies. At 20 years old, Madonna moved to New York City in 1978 to pursue a career in modern dance. After performing as a drummer, guitarist, and vocalist in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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