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Schistidium Antarctici
''Schistidium antarctici'' is a species of moss found in Antarctica and subantarctic islands. It lives in compact clumps that are yellowish green at the top and brownish black at the bottom. It grows on both soil and rocks. In the Windmill Islands area of Wilkes Land, ''Schistidium antarctici'' is the most common bryophyte. If its habitat supplies ample moisture, it may form a "carpet-like" growth, but if its habitat is dry, it forms a short "cushion-like" growth. It fruits abundantly on Signy Island and elsewhere in Northern maritime Antarctica.Investment in Sexual Reproduction by Antarctic Mosses P. Convey and R. I. Lewis Smith Oikos, Vol. 68, No. 2 (Nov., 1993), pp. 293-302] Each capsule of the moss produces between 250,000 and 520,000 spores, each 9.3 μm in diameter and with a volume of 143 μm3 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jules Cardot
Jules Cardot (18 August 1860 – 22 November 1934) was a French people, French botany, botanist and bryology, bryologist considered in his time one of the world's leading experts on the mosses of Antarctica. He was the son-in-law of botanist Louis Alexandre Henri Joseph Piré, Louis Piré. His collection of herbarium specimens at his laboratories in Charleville, Marne, Charleville was heavily looted and damaged during World War I. The French Academy of Sciences awarded the 1893 "Prix Montague" to Cardot for his work on mosses. Cardot named 40 genera and 1200 species. Works *Cardot, J. Nouvelle contribution à la flore bryologique des îles atlantiques.' // Bull.Herb.Boissier.Sér.2., Geneva. Impr. Romanet. Vol. v (2). Feb. 1905 References 19th-century French botanists Bryologists 1860 births 1934 deaths 20th-century French botanists {{France-botanist-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moss
Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) '' sensu stricto''. Bryophyta (''sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and hornworts. Mosses typically form dense green clumps or mats, often in damp or shady locations. The individual plants are usually composed of simple leaves that are generally only one cell thick, attached to a stem that may be branched or unbranched and has only a limited role in conducting water and nutrients. Although some species have conducting tissues, these are generally poorly developed and structurally different from similar tissue found in vascular plants. Mosses do not have seeds and after fertilisation develop sporophytes with unbranched stalks topped with single capsules containing spores. They are typically tall, though some species are much larger. ''Dawsonia'', the tallest moss in the world, can grow to in height. There are a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctica
Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of . Most of Antarctica is covered by the Antarctic ice sheet, with an average thickness of . Antarctica is, on average, the coldest, driest, and windiest of the continents, and it has the highest average elevation. It is mainly a polar desert, with annual precipitation of over along the coast and far less inland. About 70% of the world's freshwater reserves are frozen in Antarctica, which, if melted, would raise global sea levels by almost . Antarctica holds the record for the lowest measured temperature on Earth, . The coastal regions can reach temperatures over in summer. Native species of animals include mites, nematodes, penguins, seals and tardigrades. Where vegetation o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Antarctic Data Centre
The Australian Antarctic Data Centre is a section of the Australian Antarctic Division, which forms part of the Australian Government, Commonwealth of Australia, in the Department of the Environment and Energy. AADC services form the backbone of data collection and data management in Australia's Antarctic Science Program. Services * Managing science data from Australia's Antarctic research (acquiring, indexing, storing, disseminating, linking and data mining) * Mapping Australia's areas of interest in the Antarctic region * Managing Australia's Antarctic state of the environment reporting * Fabricating, installing and managing Australia's Antarctic station tide gauges * Providing advice and education and a range of other products Purpose The AADC undertakes its role in alignment with the National Antarctic data management policy. Scientific data are key (and highly valuable) outputs of Australia's Antarctic Science Program and therefore should be managed for posterity. Ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Windmill Islands
The Windmill Islands are an Antarctic group of rocky islands and rocks about wide, paralleling the coast of Wilkes Land for immediately north of Vanderford Glacier along the east side of Vincennes Bay. Kirkby Shoal is a small shoal area with depths of less than extending about westwards and SSW, about from the summit of Shirley Island, Windmill Islands, and NW of Stonehocker Point, Clark Peninsula. The Windmill Islands were mapped from aerial photographs taken by USN Operation Highjump, 1946–47. So named by the US-ACAN because personnel of Operation Windmill, 1947–48, landed on Holl Island at the southwest end of the group to establish ground control for USN Operation Highjump photographs. The term "Operation Windmill" is a popular expression which developed after the expedition disbanded and refers to the extensive use of helicopters made by this group. The official title of this expedition was the 'Second Antarctic Development Project', U.S. Navy Task Force 39, 1947†... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilkes Land
Wilkes Land is a large district of land in eastern Antarctica, formally claimed by Australia as part of the Australian Antarctic Territory, though the validity of this claim has been placed for the period of the operation of the Antarctic Treaty, to which Australia is a signatory. Geography Wilkes Land fronts on the southern Indian Ocean between Queen Mary Coast and Adelie Land, extending from Cape Hordern in 100°31' E to Pourquoi Pas Point, in 136°11' E. The region extends as a sector about 2600 km towards the South Pole, with an estimated land area of 2,600,000 km², mostly glaciated. Subdivisions It is further subdivided in the following coastal areas which can also be thought of as sectors extending to the South Pole: # Knox Land: 100°31' E to 109°16' E # Budd Land: 109°16' E to 115°33' E # Sabrina Land: 115°33' E to 122°05' E # Banzare Land: 122°05' E to 130°10' E # Clarie Land: (Wilkes Coast) 130° ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bryophyte
The Bryophyta s.l. are a proposed taxonomic division containing three groups of non-vascular land plants (embryophytes): the liverworts, hornworts and mosses. Bryophyta s.s. consists of the mosses only. They are characteristically limited in size and prefer moist habitats although they can survive in drier environments. The bryophytes consist of about 20,000 plant species. Bryophytes produce enclosed reproductive structures (gametangia and sporangia), but they do not produce flowers or seeds. They reproduce sexually by spores and asexually by fragmentation or the production of gemmae. Though bryophytes were considered a paraphyletic group in recent years, almost all of the most recent phylogenetic evidence supports the monophyly of this group, as originally classified by Wilhelm Schimper in 1879. The term ''bryophyte'' comes . Terminology The term "Bryophyta" was first suggested by Braun in 1864. G.M. Smith placed this group between Algae and Pteridophyta. Features The d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Signy Island
Signy Island is a small subantarctic island in the South Orkney Islands of Antarctica. It was named by the Norwegian whaler Petter Sørlle (1884–1933) after his wife, Signy Therese. The island is about long and wide and rises to above sea level. Much of it is permanently covered with ice. The average temperature range is to about in winter (i.e. in July). The extremes extend to . It is separated from Coronation Island to the north by Normanna Strait, and from Moe Island to the southwest by Fyr Channel. On Signy Island, the British Antarctic Survey (BAS) maintains the Signy Research Station, a scientific station for research in biology. The base was opened on 18 March 1947, on the site of an earlier whaling station that had existed there in the 1920s. The station was staffed year-round until 1996; since that year it has been occupied only from November to April. It houses 10 people. Geography A number of locations on the island have been charted and individually named ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grimmiales
Grimmiales is an order of mosses in the subclass Dicranidae. It comprises four families: Grimmiaceae, Ptychomitriaceae Ptychomitriaceae is a family of mosses in the subclass Dicranidae The Dicranidae are a widespread and diverse subclass of mosses in class Bryopsida, with many species of dry or disturbed areas. They are distinguished by their spores; the peri ..., Seligeriaceae, and Saelaniaceae. References Moss orders {{bryophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
