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Haliotis Sorenseni
The white abalone, scientific name ''Haliotis sorenseni'', is a species of large sea snail, a marine gastropod mollusk in the family Haliotidae, the abalones.Rosenberg, G. (2014). Haliotis sorenseni. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=445362 on 2014-10-29 The white abalone is an endangered species in the United States; it may now have the smallest population of all eight of the abalone species on the west coast of North America. Distribution Historically the white abalone ranged from Point Conception, California to Baja California, Mexico, and was found especially on the offshore islands. In the most northerly part of the California range, white abalone were reported as being more common along the mainland coast. However, in the middle portion of the California range, they were noted to occur more frequently at the offshore islands, especially San Clemente and Santa Catalina Islands. At the more sou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coralline Algae
Coralline algae are red algae in the order Corallinales. They are characterized by a thallus that is hard because of calcareous deposits contained within the cell walls. The colors of these algae are most typically pink, or some other shade of red, but some species can be purple, yellow, blue, white, or gray-green. Coralline algae play an important role in the ecology of coral reefs. Sea urchins, parrot fish, and limpets and chitons (both mollusks) feed on coralline algae. In the temperate Mediterranean Sea, coralline algae are the main builders of a typical algal reef, the ''Coralligène'' ("coralligenous"). Many are typically encrusting and rock-like, found in marine waters all over the world. Only one species lives in freshwater. Unattached specimens ( maerl, rhodoliths) may form relatively smooth compact balls to warty or fruticose thalli. A close look at almost any intertidal rocky shore or coral reef will reveal an abundance of pink to pinkish-grey patches, distributed throu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isla Natividad
Isla Natividad is an island in the Pacific Ocean 6 km west off Punta Eugenia, the northwestern headland of the Mexican state of Baja California Sur. 200 meters off its northwestern end lies Roca María at , with an area of 0.074 km2. Isla Natividad is separated from the mainland at Punta Eugenia by Canal de Dewey (Dewey's Channel), and from Cedros Island (Baja California), which is 15 km to the north, by Canal de Keller (Canal Kellett). The island is part of Bahía Tortugas ''delegación'' of Mulegé municipality. It is 8.655 km2 in area. At the 2001 census, the island had a population of 384, centered in Natividad, a community of abalone, lobster, and clam fishermen, at the southeastern end (). Connection to the mainland is facilitated by an airstrip. There is a lighthouse in the northern part. Geography and ecology It has steep rocky shores fringed by rocks and kelp except for a small sandy beach towards the mainland. The island is barren and hilly wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palmaria Mollis
Palmaria may refer to: * Palmaria (island), an island in the Ligurian Sea, Italy *Palmaria (artillery), an Italian-made self-propelled howitzer * ''Palmaria'' (alga), a genus of red algae **''Palmaria palmata ''Palmaria palmata'', also called dulse, dillisk or dilsk (from Irish/Scottish Gaelic '/'), red dulse, sea lettuce flakes, or creathnach, is a red alga (Rhodophyta) previously referred to as ''Rhodymenia palmata''. It grows on the northern coast ...'', a species of red algae {{disamb nl:Palmaria (geslacht) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macrocystis Pyrifera
''Macrocystis'' is a monospecific genus of kelp (large brown algae). This genus contains the largest of all the phaeophyceae or brown algae. ''Macrocystis'' has pneumatocysts at the base of its blades. Sporophytes are perennial and the individual may live for up to three years; stipes/fronds within a whole individual undergo senescence, where each frond may persist for approximately 100 days. The genus is found widely in subtropical, temperate, and sub-Antarctic oceans of the Southern Hemisphere (e.g. Chile, New Zealand, Australia, Falkland Islands, Auckland Islands, etc.) and in the northeast Pacific from Baja California to Sitka, Alaska. ''Macrocystis'' is often a major component of temperate kelp forests. Description ''Macrocystis'' is a monospecific genus, the sole species is ''M. pyrifera''. Some individuals are so huge that the thallus may grow to up to 60 m (200 ft).C. van den Hoek, D.G. Mann and H.M. Jahns (1995) Algae An Introduction to Phycology'. Cambridg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chondracanthus Exasperatus
''Chondracanthus exasperatus'', commonly called Turkish towel, is a species of seaweed in the family Gigartinaceae. The specific epithet ' ( lit. 'roughened') refers to the bumpy texture of the blades (leaf-like structures). This texture also leads to the common name which evokes the luxurious feel of a towel from a Turkish bath. The rough, papillae-strewn blade surface even makes it difficult to measure the temperature using infrared thermometers. Description It is a perennial species. Like many species in Gigartinaceae, the appearance of ''C. exasperatus'' can vary depending upon grown conditions. It can be confused with '' Chondracanthus spinosus'' and '' Gigartina binghamiae'', and it might take RFLP analysis to be sure of the species. In addition, the names of the species in the genera '' Gigartina'' and '' Chondracanthus'' have been adjusted several times since 1961. It is also similar to '' Mastocarpus'' species, known as Turkish washcloths, but is smaller, with branch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Algae
Red algae, or Rhodophyta (, ; ), are one of the oldest groups of eukaryotic algae. The Rhodophyta also comprises one of the largest phyla of algae, containing over 7,000 currently recognized species with taxonomic revisions ongoing. The majority of species (6,793) are found in the Florideophyceae (class), and mostly consist of multicellular, marine algae, including many notable seaweeds. Red algae are abundant in marine habitats but relatively rare in freshwaters. Approximately 5% of red algae species occur in freshwater environments, with greater concentrations found in warmer areas. Except for two coastal cave dwelling species in the asexual class Cyanidiophyceae, there are no terrestrial species, which may be due to an evolutionary bottleneck in which the last common ancestor lost about 25% of its core genes and much of its evolutionary plasticity. The red algae form a distinct group characterized by having eukaryotic cells without flagella and centrioles, chloroplasts that l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Agarum Fimbriatum
Agarum (also transliterated as Agaru or Akarum, cuneiform: ''a-kà-rum'' or ''a-ga-rum'') is a bronze-age Near Eastern proper name, probably a toponym for a region or island in the Eastern Arabia and Persian Gulf. Agarum has been generally identified with Kuwait's Failaka Island, known as ´KR to the Arameans and as Ikaros during the Hellenistic times. Failaka's Ekara temple is another probable location.Glassner 1988, pp. 240-243. Agarum is sometimes identified with the mediaeval city of Haǧar, in the general region of Al-Ahsa Oasis in Saudi Arabia and Bahrain Island in Bahrain. The name Agarum is attested in the earlier half of the 2nd millennium BCE, mentioned in inscriptions of the ancient Dilmun civilization (modern-day Bahrain). Agarum was associated with Inzak, the chief deity of Dilmunite pantheon. Several Dilmunite kings styled themselves as "servants of the Inzak of Agarum"; such kings included Rimum (c. 18th century BCE), Yagli-El (c. 18th and 17th centuries BCE), an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laminaria Farlowii
''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] |
Herbivore
A herbivore is an animal anatomically and physiologically adapted to eating plant material, for example foliage or marine algae, for the main component of its diet. As a result of their plant diet, herbivorous animals typically have mouthparts adapted to rasping or grinding. Horses and other herbivores have wide flat teeth that are adapted to grinding grass, tree bark, and other tough plant material. A large percentage of herbivores have mutualistic gut flora that help them digest plant matter, which is more difficult to digest than animal prey. This flora is made up of cellulose-digesting protozoans or bacteria. Etymology Herbivore is the anglicized form of a modern Latin coinage, ''herbivora'', cited in Charles Lyell's 1830 ''Principles of Geology''.J.A. Simpson and E.S.C. Weiner, eds. (2000) ''The Oxford English Dictionary'', vol. 8, p. 155. Richard Owen employed the anglicized term in an 1854 work on fossil teeth and skeletons. ''Herbivora'' is derived from Latin ''herba' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Algae
Algae (; singular alga ) is an informal term for a large and diverse group of photosynthetic eukaryotic organisms. It is a polyphyletic grouping that includes species from multiple distinct clades. Included organisms range from unicellular microalgae, such as ''Chlorella,'' ''Prototheca'' and the diatoms, to multicellular forms, such as the giant kelp, a large brown alga which may grow up to in length. Most are aquatic and autotrophic (they generate food internally) and lack many of the distinct cell and tissue types, such as stomata, xylem and phloem that are found in land plants. The largest and most complex marine algae are called seaweeds, while the most complex freshwater forms are the ''Charophyta'', a division of green algae which includes, for example, ''Spirogyra'' and stoneworts. No definition of algae is generally accepted. One definition is that algae "have chlorophyll ''a'' as their primary photosynthetic pigment and lack a sterile covering of cells around thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macroalgae
Seaweed, or macroalgae, refers to thousands of species of macroscopic, multicellular, marine algae. The term includes some types of ''Rhodophyta'' (red), ''Phaeophyta'' (brown) and ''Chlorophyta'' (green) macroalgae. Seaweed species such as kelps provide essential nursery habitat for fisheries and other marine species and thus protect food sources; other species, such as planktonic algae, play a vital role in capturing carbon, producing at least 50% of Earth's oxygen. Natural seaweed ecosystems are sometimes under threat from human activity. For example, mechanical dredging of kelp destroys the resource and dependent fisheries. Other forces also threaten some seaweed ecosystems; a wasting disease in predators of purple urchins has led to a urchin population surge which destroyed large kelp forest regions off the coast of California. Humans have a long history of cultivating seaweeds for their uses. In recent years, seaweed farming has become a global agricultural practice, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Selenizone
A selenizone (from the Greek "selene" meaning "moon", and "zone" meaning "girdle") is an anatomical structure that exists in the shells of some families of living sea snails: the slit shells, the little slit shells and the abalones, which are marine gastropod mollusks from ancient lineages. It is a spiral band of crescentric growth lines or threads (lunulae) on the shell surface due to the semicircular end of a notch or slit on the outer lip. A structure of the same type exists in several fossil groups of mollusks, including all the fossil families of slit shells, as well as three superfamilies of what may have been gastropods, but may possibly have been monoplacophorans or paragastropods instead. The function of the holes and slits in living sea snails is to allow for exhalant water circulation, which is important for respiration and other functions. It has also been suggested that the selenizone may serve to reinforce the shell against catastrophic breakage during predati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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