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Laminaria Pallida
''Laminaria pallida'', the split-fan kelp, is a species of large brown seaweed of the class Phaeophyceae found from Danger Point on the south coast of South Africa to Port Nolloth, Tristan da Cunha and Gough islands in the Atlantic and Île Saint-Paul in the Indian Ocean. Description The large thallus is up to 10m long, with a single smooth broad blade which splits into several parallel longitudinal straps. The holdfast is multiply branched, and the stipe is usually solid, fairly stiff, round in section and tapers gradually toward the blade. In specimens with hollow stipes the stipe narrows towards the base. Distribution Danger Point on the south coast of South Africa to Port Nolloth in Namibia, Tristan da Cunha and Gough islands in the Atlantic and St Paul Island in the Indian Oacean. Type locality: Table Bay Table Bay (Afrikaans: ''Tafelbaai'') is a natural bay on the Atlantic Ocean overlooked by Cape Town (founded 1652 by Van Riebeeck) and is at the northern end o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phaeophyceae
Brown algae (singular: alga), comprising the class Phaeophyceae, are a large group of multicellular algae, including many seaweeds located in colder waters within the Northern Hemisphere. Brown algae are the major seaweeds of the temperate and polar regions. They are dominant on rocky shores throughout cooler areas of the world. Most brown algae live in marine environments, where they play an important role both as food and as a potential habitat. For instance, '' Macrocystis'', a kelp of the order Laminariales, may reach in length and forms prominent underwater kelp forests. Kelp forests like these contain a high level of biodiversity. Another example is ''Sargassum'', which creates unique floating mats of seaweed in the tropical waters of the Sargasso Sea that serve as the habitats for many species. Many brown algae, such as members of the order Fucales, commonly grow along rocky seashores. Some members of the class, such as kelps, are used by humans as food. Between 1,500 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Danger Point
Danger Point is a coastal feature and cliff face in Devon, on the south coast of England. It is about southeast of the city of Exeter and about east of Exmouth and lies between the towns of Budleigh Salterton and Sidmouth. Geology and littoral ecology There are two rock sequences along the coast at Budleigh Salterton, the Pebble Beds and the "Otter Sandstone Formation". In the cliff face it is very apparent that both dip eastward. The "Budleigh Salterton Pebble Beds" are overlain by the sandstones that form the cliffs at Danger Point. Both sediments are markedly red, which indicates that they were formed in a desert in the hot dry climate of in the Triassic The Triassic ( ) is a geologic period and system which spans 50.6 million years from the end of the Permian Period 251.902 million years ago ( Mya), to the beginning of the Jurassic Period 201.36 Mya. The Triassic is the first and shortest per ... Period about 225 million years ago. The coastal path, south of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Port Nolloth
Port Nolloth is a town and small domestic seaport in the Namaqualand region on the northwestern coast of South Africa, northwest of Springbok. It is the seat of the Richtersveld Local Municipality. The port was previously a transshipment point for copper from the Okiep mines, and diamonds from the Namaqua coast. Since the 1970s the principal seagoing activities have been fishing and small-vessel tourism. Today the town is a sleepy commercial hub with a number of holiday homes and a caravan park at the adjacent McDougalls Bay. It is also a gateway to the Richtersveld National Park, located to the north along the Orange River. History The bay upon which the port sits was known by the indigenous Namaqua people as ''Aukwatowa'' ("Where the water took away the old man"). Its location was marked by Portuguese explorer Bartolomeu Dias on his epic voyage around the Cape of Good Hope in 1487. It was the last landfall he sighted before a wild storm blew his ship off course and ou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tristan Da Cunha
Tristan da Cunha (), colloquially Tristan, is a remote group of volcanic islands in the South Atlantic Ocean. It is the most remote inhabited archipelago in the world, lying approximately from Cape Town in South Africa, from Saint Helena and from the Falkland Islands. The territory consists of the inhabited island, Tristan da Cunha, which has a diameter of roughly and an area of ; the wildlife reserves of Gough Island and Inaccessible Island; and the smaller, uninhabited Nightingale Islands. , the main island has 250 permanent inhabitants, who all carry British Overseas Territories citizenship. The other islands are uninhabited, except for the South African personnel of a weather station on Gough Island. Tristan da Cunha is a British Overseas Territory with its own constitution. There is no airstrip on the main island; the only way of travelling in and out of Tristan is by boat, a six-day trip from South Africa. History Discovery The uninhabited islands were fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gough Island
upright=1.3, Map of Gough island Gough Island ( ), also known historically as Gonçalo Álvares, is a rugged volcanic island in the South Atlantic Ocean. It is a dependency of Tristan da Cunha and part of the British overseas territory of Saint Helena, Ascension and Tristan da Cunha. It is about south-east of the Tristan da Cunha archipelago (which includes Nightingale Island and Inaccessible Island), north-east from South Georgia Island, west from Cape Town, and over from the nearest point of South America. Gough Island is uninhabited, except for the personnel of a weather station (usually six people) that the South African National Antarctic Programme has maintained, with British permission, continually on the island since 1956. It is one of the most remote places with a constant human presence. It is part of the UNESCO World Heritage Site of "Gough and Inaccessible Island". It is one of the most important seabird colonies in the world. Name The island was first name ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Île Saint-Paul
Île Saint-Paul (Saint Paul Island) is an island forming part of the French Southern and Antarctic Lands (''Terres australes et antarctiques françaises'', TAAF) in the Indian Ocean, with an area of . The island is located about south of the larger Île Amsterdam (), northeast of the Kerguelen Islands, and southeast of Réunion. It is an important breeding site for seabirds. A scientific research cabin on the island is used for scientific or ecological short campaigns, but there is no permanent population. It is under the authority of a senior administrator on Réunion. Geography Île Saint-Paul is a volcanic island with triangular in shape that measures no more than at its widest point. It is the top of an active volcano; the volcano last erupted in 1793 (from its SW Flank), and is rocky with steep cliffs on the east side. The thin stretch of rock that used to close off the crater collapsed in 1780, admitting the sea through a channel; the entrance is only a few meters d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thallus
Thallus (plural: thalli), from Latinized Greek (), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms were previously known as the thallophytes, a polyphyletic group of distantly related organisms. An organism or structure resembling a thallus is called thalloid, thallodal, thalliform, thalline, or thallose. A thallus usually names the entire body of a multicellular non-moving organism in which there is no organization of the tissues into organs. Even though thalli do not have organized and distinct parts ( leaves, roots, and stems) as do the vascular plants, they may have analogous structures that resemble their vascular "equivalents". The analogous structures have similar function or macroscopic structure, but different microscopic structure; for example, no thallus has vascular tissue. In exceptional cases such as the Lemnoide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holdfast (biology)
A holdfast is a root-like structure that anchors aquatic sessile organisms, such as seaweed, other sessile algae, stalked crinoids, benthic cnidarians, and sponges, to the substrate. Holdfasts vary in shape and form depending on both the species and the substrate type. The holdfasts of organisms that live in muddy substrates often have complex tangles of root-like growths. These projections are called haptera and similar structures of the same name are found on lichens. The holdfasts of organisms that live in sandy substrates are bulb-like and very flexible, such as those of sea pens, thus permitting the organism to pull the entire body into the substrate when the holdfast is contracted. The holdfasts of organisms that live on smooth surfaces (such as the surface of a boulder) have flattened bases which adhere to the surface. The organism derives no nutrition from this intimate contact with the substrate, as the process of liberating nutrients from the substrate requires ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stipe (botany)
In botany, a stipe is a stalk that supports some other structure. The precise meaning is different depending on which taxonomic group is being described. file:Helicteres-Yucatán-Flowers.jpg, The long stipe of a '' Helicteres'' flower. file:Helicteres-Yucatán-Fruits.jpg, remains as each flower forms a fruit. In the case of ferns, the stipe is only the petiole from the rootstock to the beginning of the leaf tissue, or lamina. The continuation of the structure within the lamina is then termed a rachis. In flowering plants, the term is often used in reference to a stalk that sometimes supports a flower's ovary. In orchids, the stipe or caudicle is the stalk-like support of the pollinia. It is a non-viscid band or strap connecting the pollinia with the viscidium (the viscid part of the rostellum or beak). A stipe is also a structure found in organisms that are studied by botanists but that are no longer classified as plants. It may be the stem-like part of the thallus of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Table Bay
Table Bay (Afrikaans: ''Tafelbaai'') is a natural bay on the Atlantic Ocean overlooked by Cape Town (founded 1652 by Van Riebeeck) and is at the northern end of the Cape Peninsula, which stretches south to the Cape of Good Hope. It was named because it is dominated by the flat-topped Table Mountain. History Bartolomeu Dias was the first European to explore this region in 1486. The bay, although famous for centuries as a haven for ships, is actually a rather poor natural harbour and is exposed to storm waves from the northwest. Many sailing ships seeking refuge in the bay during the 17th and 18th centuries were driven ashore by winter storms. The Dutch colonists nevertheless persisted with their efforts on the shores of Table Bay, because good natural harbours along this coastline are almost non-existent. The best of them, Saldanha Bay, lacked fresh water. Simon's Bay was well protected from westerly winter storms and swells, but more exposed to summer southeasterliy sto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laminaria Pallida, Namibia (6875066070)
''Laminaria'' is a genus of brown seaweed in the order Laminariales (kelp), comprising 31 species native to the north Atlantic and northern Pacific Oceans. This economically important genus is characterized by long, leathery laminae and relatively large size. Some species are called Devil's apron, due to their shape, or sea colander, due to the perforations present on the lamina. Others are referred to as ''tangle''. ''Laminaria'' form a habitat for many fish and invertebrates. The life cycle of ''Laminaria'' has heteromorphic alternation of generations which differs from '' Fucus''. At meiosis the male and female zoospores are produced separately, then germinate into male and female gametophytes. The female egg matures in the oogonium until the male sperm fertilizes it. Life-Cycle: The most apparent form of ''Laminaria'' is its sporophyte phase, a structure composed of the holdfast, the stipe, and the blades. While it spends its time predominately in the sporophyte phase ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecklonia Maxima
''Ecklonia maxima'', or sea bamboo, is a species of kelp native to the southern oceans. It is typically found along the southern Atlantic coast of Africa, from the very south of South Africa to northern Namibia. In these areas the species dominates the shallow, temperate water, reaching a depth of up to in the offshore kelp forests. The kelp anchors itself by attaching itself to a rock or other kelp via its holdfast. From this root-like structure a single long stipe rises to the surface waters, where a large pneumatocyst keeps a tangle of blades at the surface to aid photosynthesis. The species is of economic importance as it is harvested for both an agricultural supplement and as food for farmed abalone Abalone ( or ; via Spanish , from Rumsen ''aulón'') is a common name for any of a group of small to very large marine gastropod molluscs in the family Haliotidae. Other common names are ear shells, sea ears, and, rarely, muttonfish or m .... References ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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