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Isididae
Bamboo coral, family Keratoisididae (formerly Isididae) is a family of coral of the phylum Cnidaria. It is a commonly recognized inhabitant of the deep sea, due to the clearly articulated skeletons of the species. Deep water coral species such as this are especially affected by the practice of bottom trawling. These organisms may be an important environmental indicator in the study of long term climate change, as some specimens of bamboo coral have been discovered that are 4,000 years old. Bamboo corals were previously defined to be the family Isididae, based on their articulated skeletons with proteinaceous joints, but this family was shown to be paraphyletic after it was found in 2021 that this had evolved at least five separate times. As of 2023, the taxonomy of bamboo corals is being actively revised. Description Relatively little is known about bamboo coral. The skeletons of bamboo coral are made up of calcium carbonate in the form of tree-like branches alternating with j ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coral
Corals are colonial marine invertebrates within the subphylum Anthozoa of the phylum Cnidaria. They typically form compact Colony (biology), colonies of many identical individual polyp (zoology), polyps. Coral species include the important Coral reef, reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton. A coral "group" is a colony of very many cloning, genetically identical polyps. Each polyp is a sac-like animal typically only a few millimeters in diameter and a few centimeters in height. A set of tentacles surround a central mouth opening. Each polyp excretes an exoskeleton near the base. Over many generations, the colony thus creates a skeleton characteristic of the species which can measure up to several meters in size. Individual colonies grow by asexual reproduction of polyps. Corals also breed sexually by spawning: polyps of the same species release gametes simultaneously overnight, often around a full moon. Fertilized eggs form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanella
''Acanella'' is a genus of deep sea bamboo coral of the family Keratoisididae. Acanella are mainly studied and found in Hawaii, they are able to survive in high-flow sites and are preyed upon by nudibranch mollusks. It has a high fecundity Fecundity is defined in two ways; in human demography, it is the potential for reproduction of a recorded population as opposed to a sole organism, while in population biology, it is considered similar to fertility, the capability to produc ... and small size that allows high dispersal and recruitment; however, it has been classified as a vulnerable marine organism due to its vulnerability to bottom fishing gear. Species It contains the following species: *'' Acanella africana'' Kükenthal, 1915 *'' Acanella arbuscula'' (Johnson, 1862) *'' Acanella aurelia'' Saucier & France, 2017 *'' Acanella chiliensis'' Wright & Studer, 1889 *'' Acanella dispar'' Bayer, 1990 *'' Acanella furcata'' Thomson, 1929 *'' Acanella gregori'' (Gray, 1870) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isidella Tentaculum
''Isidella'' is a genus of deep-sea bamboo coral in the family Keratoisididae. Species According to the World Register of Marine Species, six species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ... are recognized: * '' Isidella elongata'' (Esper, 1788) * '' Isidella lofotensis'' Sars, 1868 * '' Isidella longiflora'' (Verrill, 1883) * '' Isidella tentaculum'' Etnoyer, 2008 * '' Isidella tenuis'' Cairns, 2018 * '' Isidella trichotoma'' Bayer, 1990 References Isididae Bioluminescent cnidarians Octocorallia genera {{Octocorallia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gorgonin
Gorgonin is a flexible scleroprotein which provides structural strength to gorgonian corals, a subset of the order Alcyonacea. Gorgonian corals have supporting skeletal axes made of gorgonin and/or calcite. Gorgonin makes up the joints of bamboo corals in the deep sea, and forms the central internal skeleton of sea fans. It frequently contains appreciable quantities of bromine, iodine, and tyrosine. Gorgonin is diagenetically stable and is deposited in discrete annual growth rings in Primnoa resedaeformis, and possibly other species. History The study of the chemistry of gorgonin, as a substance rather than a protein, was started by Balard in 1825, who reported on the occurrence of "iodogorgic acid". Several sources cite Valenciennes as having given the protein the name of "gorgonin" in an 1855 monograph. However, the monograph cited appears to contradict this, solely naming a newly-discovered substance in Gorgonians "cornéine" after its resemblance to substances extracte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keratoisis Melitensis (Goldfuss, 1826)
''Keratoisis'' is a genus of deep-sea bamboo coral Corals are colonial marine invertebrates within the subphylum Anthozoa of the phylum Cnidaria. They typically form compact Colony (biology), colonies of many identical individual polyp (zoology), polyps. Coral species include the important Coral ... in the family Keratosididae, containing the following species: References Isididae Bioluminescent cnidarians Octocorallia genera {{Octocorallia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Papahānaumokuākea Marine National Monument
The Papahānaumokuākea Marine National Monument (PMNM) (roughly ) is a World Heritage Site, World Heritage listed National monument (United States), U.S. national monument encompassing of ocean waters, including ten islands and atolls of the Northwestern Hawaiian Islands. It was created in June 2006 with and expanded in August 2016 by moving its border to the limit of the Exclusive economic zone of the United States, exclusive economic zone, making it one of the List of largest protected areas, world's largest protected areas. It is internationally known for its cultural and natural values as follows: The area has deep cosmological and traditional significance for living Native Hawaiians, Native Hawaiian culture, as an ancestral environment, as an embodiment of the Hawaiian kinship, Hawaiian concept of kinship between people and the natural world, and as the place where it is believed that life originates and to where the spirits return after death. On two of the islands, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Monument (United States)
In the United States, a national monument is a protected area that can be created from any land owned or controlled by the federal government by proclamation of the president of the United States or an act of Congress. National monuments protect a wide variety of natural and historic resources, including sites of geologic, marine, archaeological, and cultural importance. The Antiquities Act of 1906 gives presidents the power to proclaim national monuments by executive action. In contrast, national parks in the U.S. must be created by Congressional legislation. Some national monuments were first created by presidential action and later designated as national parks by congressional approval. The 138 national monuments are managed by several federal agencies: the National Park Service, United States Forest Service, United States Fish and Wildlife Service, the Bureau of Land Management, and the National Oceanic and Atmospheric Administration (in the case of marine national monu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northwestern Hawaiian Islands
The Northwestern Hawaiian Islands also known as the Leeward Hawaiian Islands, are a series of islands and atolls located northwest of Kauai and Niihau, Niihau in the Hawaiian Islands, Hawaiian island chain. Politically, these islands are part of Honolulu County, Hawaii, Honolulu County in the U.S. state of Hawaii, with the exception of Midway Atoll. Midway Atoll is a Territories of the United States, territory distinct from the State of Hawaii, and is classified as one of the United States Minor Outlying Islands. The United States Census Bureau designates this area, excluding Midway Atoll, as Census Tract 114.98 of Honolulu County. The total land area of these islands is 3.1075 square miles (8.048 km²). With the exception of Nihoa, all these islands lie north of the Tropic of Cancer, making them the only islands in Hawaii situated outside the tropics. The Northwestern Hawaiian Islands are part of the Papahānaumokuākea Marine National Monument, a globally significant marine cons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pisces V
''Pisces V'' is a type of crewed submersible ocean exploration device, powered by battery, and capable of operating to depths of , a depth that is optimum for use in the sea waters around the Hawaiian Islands. It is used by scientists to explore the deep sea around the underwater banks in the main Hawaiian Islands, as well as the underwater features and seamounts in the Northwestern Hawaiian Islands, specifically around Kamaʻehuakanaloa Seamount (formerly Loihi). In 1973, ''Pisces V'' took part in the rescue of Roger Mallinson and Roger Chapman, who were trapped on the seabed in ''Pisces V''s sister submersible '' Pisces III''. In August 2002, ''Pisces V'' and her sister ''Pisces IV'' discovered a World War II Japanese midget submarine outside of Pearl Harbor which had been sunk by the destroyer in the first American shots fired in World War II. In 2011, marine scientists from HURL celebrated the 1,000 dives of ''Pisces V'' and ''Pisces IV''. Uses The advantage of having ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon Dioxide
Carbon dioxide is a chemical compound with the chemical formula . It is made up of molecules that each have one carbon atom covalent bond, covalently double bonded to two oxygen atoms. It is found in a gas state at room temperature and at normally-encountered concentrations it is odorless. As the source of carbon in the carbon cycle, atmospheric is the primary carbon source for life on Earth. In the air, carbon dioxide is transparent to visible light but absorbs infrared, infrared radiation, acting as a greenhouse gas. Carbon dioxide is soluble in water and is found in groundwater, lakes, ice caps, and seawater. It is a trace gas Carbon dioxide in Earth's atmosphere, in Earth's atmosphere at 421 parts per million (ppm), or about 0.042% (as of May 2022) having risen from pre-industrial levels of 280 ppm or about 0.028%. Burning fossil fuels is the main cause of these increased concentrations, which are the primary cause of climate change.IPCC (2022Summary for pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genera
Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. '' Panthera leo'' (lion) and '' Panthera onca'' (jaguar) are two species within the genus '' Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demonstrate both monophyly and validity as a separate lineag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ocean Acidification
Ocean acidification is the ongoing decrease in the pH of the Earth's ocean. Between 1950 and 2020, the average pH of the ocean surface fell from approximately 8.15 to 8.05. Carbon dioxide emissions from human activities are the primary cause of ocean acidification, with Carbon dioxide in Earth's atmosphere, atmospheric carbon dioxide () levels exceeding 422 ppm (). from the atmosphere is absorbed by the oceans. This chemical reaction produces carbonic acid () which dissociates into a bicarbonate ion () and a hydrogen ion (). The presence of free hydrogen ions () lowers the pH of the ocean, increasing acidity (this does not mean that seawater is acidic yet; it is still alkaline, with a pH higher than 8). Marine biogenic calcification, Marine calcifying organisms, such as Mollusca, mollusks and corals, are especially vulnerable because they rely on calcium carbonate to build shells and skeletons. A change in pH by 0.1 represents a 26% increase in hydrogen ion concentration in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
