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Imuta-ike
is a freshwater caldera lake in Satsumasendai, Kagoshima Prefecture, Japan. It forms part of Imutaike Prefectural Natural Park. Its plant communities were designated a Natural Monument of Japan in 1921 and sixty hectares of wetlands were designated a Ramsar Site in 2005. Geography Imuta-ike is surrounded by mountains; Funamidake (), San-o-dake (), Katagi-yama (), Tōmigashiro (), Ī-moriyama (, known due to its beauty also as Imuta-fuji), and there is no incoming large river. The outgoing water flows into Sendai River and Hiwagi River. Imuta-ike is in the last stage of the lake-pond formation cycle and is shrinking with the deposition of sediment. The colour of the pond is brown, 14 on the Forel-Ule scale, and its pH is 6.8; the water of the pond contains organic substances.Masaaki Tanaka ''Nihon Koshoushi 2 '' 2004, University of Nagoya Press , There are many cherry trees around the pond. About one third of its area, to the northwest, is wetland; dotted by floating islands ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ramsar Sites In Japan
The Ramsar Convention on Wetlands of International Importance Especially as Waterfowl Habitat is an international treaty for the conservation and sustainable use of wetlands. Adopted in 1971, it entered into force in 1975 and as of April 2022 had 172 contracting parties. Japan was the twenty-fourth party to accede, on 17 October 1980. Kushiro-shitsugen was the first of Japan's fifty-three Ramsar sites as of April 2022, with a total surface area of . Designated sites See also * Ramsar Convention * List of Ramsar sites worldwide * List of national parks of Japan * Wildlife Protection Areas in Japan in Japan are established by the Ministry of the Environment and, for areas of more local importance, by the Prefectural Governments in order "to protect and promote the reproduction of birds and mammals" in accordance with the 2002 (superseding ... References External links {{Commons category, Ramsar sites in Japan Ramsar - Japan Protected areas of Japan Environment ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imutaike Prefectural Natural Park
is a Prefectural Natural Park in central Kagoshima Prefecture, Japan. Established in 1953, the park spans the municipalities of Aira, Satsuma, and Satsumasendai is a city located in Kagoshima Prefecture, Japan. The modern city of Satsumasendai was established on October 12, 2004, from the merger of the city of Sendai, the towns of Hiwaki, Iriki, Kedōin and Tōgō, and the Koshikijima Islands (which .... See also * National Parks of Japan * Ramsar Sites in Japan References Parks and gardens in Kagoshima Prefecture Protected areas established in 1953 1953 establishments in Japan {{Japan-protected-area-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caldera Lake
A volcanic crater lake is a lake in a crater that was formed by explosive activity or a collapse during a volcanic eruption. Formation Lakes in calderas fill large craters formed by the collapse of a volcano during an eruption. Lakes in maars fill medium-sized craters where an eruption deposited debris around a vent. Crater lakes form as the created depression, within the crater rim, is filled by water. The water may come from precipitation, groundwater circulation (often hydrothermal fluids in the case of volcanic craters) or melted ice. Its level rises until an equilibrium is reached between the rates of incoming and outgoing water. Sources of water loss singly or together may include evaporation, subsurface seepage, and, in places, surface leakage or overflow when the lake level reaches the lowest point on its rim. At such a saddle location, the upper portion of the lake is contained only by its adjacent natural volcanic dam; continued leakage through or surface outflow acr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kagoshima Prefecture
is a prefecture of Japan located on the island of Kyushu and the Ryukyu Islands. Kagoshima Prefecture has a population of 1,599,779 (1 January 2020) and has a geographic area of 9,187 km2 (3,547 sq mi). Kagoshima Prefecture borders Kumamoto Prefecture to the north and Miyazaki Prefecture to the northeast. Kagoshima is the capital and largest city of Kagoshima Prefecture, with other major cities including Kirishima, Kanoya, and Satsumasendai. Kagoshima Prefecture is located at the southernmost point of Kyūshū and includes the Satsunan Islands group of the Ryukyu Islands. Kagoshima Prefecture's mainland territory extends from the Ariake Sea to Shibushi Bay on the Pacific Ocean coast, and is characterized by two large peninsulas created by Kagoshima Bay. Kagoshima Prefecture formed the core of the Satsuma Domain, ruled from Kagoshima Castle, one of the most important Japanese domains of the Edo period and the Meiji Restoration. History Kagoshima Prefecture correspo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brasenia
''Brasenia'', commonly known as ''watershield'', is a genus belonging to the family Cabombaceae, consisting of one species, ''Brasenia schreberi''. It is widely distributed in North America, the West Indies, northern South America (Venezuela, Guyana), eastern Asia (China, Japan, Korea, Primorye), Australia, the Indian Subcontinent, and parts of Africa. ''Brasenia'' is a perennial aquatic plant with floating, peltate leaves and rhizomatous stems. It is identified by its bright green leaves, small purple flowers that bloom from June through September, and a thick mucilage that covers all of the underwater organs, including the underside of the leaves, stems, and developing buds. This mucilage may be an anti-herbivore defence trait, perhaps to deter snail grazing. It grows in shallow water of lakes, rivers and beaver ponds, particularly those with somewhat acidic water. Characteristics ''Brasenia'' exhibits wind pollination. The flowers have a two-day blooming period. On the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is gone. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a Volcanic crater, crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur each century, the formation of a caldera is a rare event, occurring only a few times per century. Only seven caldera-forming collapses are known to have occurred between 1911 and 2016. More recently, a caldera collapse occurred at Kīlauea, Hawaii in 2018. Etymology The term ''caldera'' comes from Spanish language, S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lava Domes
In volcanology, a lava dome is a circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. Dome-building eruptions are common, particularly in convergent plate boundary settings. Around 6% of eruptions on Earth are lava dome forming. The geochemistry of lava domes can vary from basalt (e.g. Semeru, 1946) to rhyolite (e.g. Chaiten, 2010) although the majority are of intermediate composition (such as Santiaguito, dacite-andesite, present day) The characteristic dome shape is attributed to high viscosity that prevents the lava from flowing very far. This high viscosity can be obtained in two ways: by high levels of silica in the magma, or by degassing of fluid magma. Since viscous basaltic and andesitic domes weather fast and easily break apart by further input of fluid lava, most of the preserved domes have high silica content and consist of rhyolite or dacite. Existence of lava domes has been suggested for some domed structures on the Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
20090830 Imutaike Kagoshima-ken Japan
9 (nine) is the natural number following and preceding . Evolution of the Arabic digit In the beginning, various Indians wrote a digit 9 similar in shape to the modern closing question mark without the bottom dot. The Kshatrapa, Andhra and Gupta started curving the bottom vertical line coming up with a -look-alike. The Nagari continued the bottom stroke to make a circle and enclose the 3-look-alike, in much the same way that the sign @ encircles a lowercase ''a''. As time went on, the enclosing circle became bigger and its line continued beyond the circle downwards, as the 3-look-alike became smaller. Soon, all that was left of the 3-look-alike was a squiggle. The Arabs simply connected that squiggle to the downward stroke at the middle and subsequent European change was purely cosmetic. While the shape of the glyph for the digit 9 has an ascender in most modern typefaces, in typefaces with text figures the character usually has a descender, as, for example, in . The mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Libellula Angelina
''Libellula angelina'', also known as bekko tombo, is a species of dragonfly in the family Libellulidae, native to China and Japan. It is under threat by rapid loss of the ponds and other small water bodies it uses as habitat, and is currently classified as critically endangered by the IUCN. Description The bekko tombo is a golden to rusty-brown dragonfly, with a dark stripe down the centre of the abdomen and a distinctive pattern of dark markings on its wings. Like other members of the family Libellulidae, this dragonfly has a relatively short, broad abdomen, and its body is distinctly shorter than its wingspan. Distribution and habitat The bekko tombo occurs in central and northern China, Japan (Honshu, Shikoku, Kyushu and offshore islands) and Korea. It inhabits old and stable ponds with moderate plant growth in lowland hill areas. It requires clear, open water in which the nymphs crawl around in the bottom sediments. Ecology The bekko tombo is univoltine. It has a larval pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Odonata
Odonata is an order of flying insects that includes the dragonflies and damselflies. Members of the group first appeared during the Triassic, though members of their total group, Odonatoptera, first appeared in Late Carboniferous. The two common groups are distinguished with dragonflies, placed in the suborder Epiprocta, usually being larger, with eyes together and wings up or out at rest, while damselflies, suborder Zygoptera, are usually smaller with eyes placed apart and wings along body at rest. All Odonata have aquatic larvae called naiads (nymphs), and all of them, larvae and adults, are carnivorous. The adults can land, but rarely walk. Their legs are specialised for catching prey. They are almost entirely insectivorous. Etymology and terminology Fabricius coined the term ''Odonata'' in 1793 from the Ancient Greek ( Ionic form of ) 'tooth'. One hypothesis is that it was because their maxillae are notably toothed. Most insects also have toothed mandibles. The wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oryzias Latipes
The Japanese rice fish (''Oryzias latipes''), also known as the medaka, is a member of genus ''Oryzias'' (ricefish), the only genus in the subfamily Oryziinae. This small (up to about ) native of East Asia is a denizen of rice paddies, marshes, ponds, slow-moving streams and tide pools. It is euryhaline, occurring in both brackish and freshwater. It became popular as an aquarium fish because of its hardiness and pleasant coloration: its coloration varies from creamy-white to yellowish in the wild to white, creamy-yellow, or orange in aquarium-bred individuals. Bright yellow, red or green transgenic populations, similar to GloFish, have also been developed, but are banned from sale in the EU. The medaka has been a popular pet since the 17th century in Japan. After fertilization, the female carries her eggs attached anterior to the anal fin for a period before depositing them on plants or similar things. Ecology Medaka live in small ponds, shallow rivers, and rice fields. They ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
