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Halimeda Opuntia
''Halimeda opuntia'', sometimes known as the watercress alga, is a species of calcareous green seaweed in the order Bryopsidales. It is native to reefs in the Indo-Pacific region, the Atlantic Ocean and the Mediterranean Sea. Description ''Halimeda opuntia'' forms thick, frequently-branched clumps of calcified, leaf-like segments up to high. The segments are flat and kidney- or fan-shaped, up to high and broad. They have a distinct central rib and a smooth, sinuous, or lobe-shaped, upper margin. Rhizoids grow where the segments touch the substrate. The plants are often crammed closely together forming a dense mat of herbage in which the individual plants are not easily discernible. Distribution and habitat ''Halimeda opuntia'' is found in the Indo-Pacific Ocean, the Atlantic Ocean, the Mediterranean Sea, and the Caribbean Sea and around the coasts of Florida and the Bahamas. It grows in grooves, depressions and cracks in rocks and between coral heads in moderately protected ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nembrotha Cristata
''Nembrotha cristata'' is a species of colourful sea slug, a polycerid nudibranch, a marine gastropod mollusk in the family Polyceridae.Bouchet, P. (2015)''Nembrotha cristata'' Bergh, 1877.In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2015-09-06 This species of sea slug is black with green markings; adults are around 50 mm in length, and they live on rock or coral reefs in the tropical Indo-West Pacific Ocean. Description ''Nembrotha cristata'' is a large black nembrothine ("nembrothid" in much of the literature) that grows to at least 50 mm in length. Its body is covered with raised green nodules. The rhinophores and gills are black, edged in green. Other than the difference in colour, this species is similar in appearance to ''Nembrotha yonowae''. Distribution This nudibranch species was described from the Philippines. It occurs in the tropical Indo-West Pacific Ocean.Rudman, W.B., 1999 (January 21''Nembrotha cristata'' Bergh, 1877. n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timor Leste
East Timor (), also known as Timor-Leste (), officially the Democratic Republic of Timor-Leste, is an island country in Southeast Asia. It comprises the eastern half of the island of Timor, the exclave of Oecusse on the island's north-western half, and the minor islands of Atauro Island, Atauro and Jaco Island, Jaco. Australia is the country's southern neighbour, separated by the Timor Sea. The country's size is . Dili is its capital and largest city. East Timor came under Portugal, Portuguese influence in the sixteenth century, remaining a Portuguese Timor, Portuguese colony until 1975. Internal conflict preceded a unilateral declaration of independence and an Indonesian invasion of East Timor, Indonesian invasion and East Timor (province), annexation. Resistance continued throughout Indonesian rule, and in 1999 a United Nations Transitional Administration in East Timor, United Nations–sponsored act of self-determination led to Indonesia relinquishing control of the territ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Vincent Félix Lamouroux
Jean Vincent Félix Lamouroux (3 May 1779 – 26 March 1825) was a French biologist and naturalist, noted for his seminal work with algae. Biography Lamouroux was born in Agen in the Aquitaine of southwestern France, the son of Claude Lamouroux, an intellectual who made his livelihood in manufacturing, but who was also a musician, a one-term mayor of Agen, and a co-founder of the Academic Society of Agen. Jean Vincent Lamouroux studied botany at the Boudon de Saint-Amans school in Agen. Lamouroux was particularly interested in marine organisms such as algae and hydrozoans. In 1805 he published a dissertation on several species of ''Fucus'' before settling in Paris in 1807, after his father went into bankruptcy. In 1807, Lamouroux was appointed to the French Academy of Sciences and in 1808 he became assistant professor of natural history at the University of Caen, rising to full professorship by 1811. He joined the Linnean Society of Calvados and contributed to its publications, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corallina
''Corallina'' is a genus of red seaweeds with hard, abrasive calcareous skeletons in the family Corallinaceae. They are stiff, branched plants with articulations. Species # ''Corallina aberrans'' (Yendo) K.R.Hind & G.W.Saunders # '' Corallina abundans'' Me.Lemoine # '' Corallina arbuscula'' Postels & Ruprecht # '' Corallina armata'' J.D.Hooker & Harvey # '' Corallina bathybentha'' E.Y.Dawson # '' Corallina berteroi'' Montagne ex Kützing # '' Corallina bifurca'' Kützing # '' Corallina binangonensis'' Ishijima # '' Corallina confusa'' Yendo # ''Corallina cossmannii'' Me.Lemoine # '' Corallina crassisima'' (Yendo) K.Hind & G.W.Saunders # ''Corallina declinata'' (Yendo) K.Hind & G.W.Saunders # ''Corallina ferreyrae'' E.Y.Dawson, Acleto & Foldvik # '' Corallina goughensis'' Y.M.Chamberlain # '' Corallina hombronii'' (Montagne) Montagne ex Kützing # '' Corallina maxima'' (Yendo) K.R.Hind & G.W.Saunders # '' Corallina melobesioides'' (Segawa) Martone, S.C.Lindstrom, K.A.M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flabellaria
''Flabellaria'' is a genus in the Malpighiaceae, a family of about 75 genera of flowering plants in the order Malpighiales. ''Flabellaria'' includes one variable species, ''Flabellaria paniculata''. Etymology The genus name ''Flabellaria'' comes from the Latin word ''flabellum'' meaning small fan, referring to the shape of the samara. Synonyms * ''Triaspis flabellaria'' A.Juss. * ''Triopterys pinnata'' Poir. Fossil record This genus is known in the fossil record from the Cretaceous to the Eocene (age range: from 70.6 to 33.9 million years ago.). Description ''Flabellaria paniculata'', the only living species in this genus, can reach a length of . These plants are woody vine, with paniculate, lateral and terminal inflorescences up to 20 cm. long. Flowers are radially symmetrical, about 1 centimeter in diameter, with white and spatulate petals. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fucus
''Fucus'' is a genus of brown algae found in the intertidal zones of rocky seashores almost throughout the world. Description and life cycle The thallus is perennial with an irregular or disc-shaped holdfast or with haptera. The erect portion of the thallus is dichotomous or subpinnately branched, flattened and with a distinct midrib. Gas-filled pneumatocysts (air-vesicles) are present in pairs in some species, one on either side of the midrib. The erect portion of the thallus bears cryptostomata and caecostomata (sterile surface cavities). The base of the thallus is stipe-like due to abrasion of the tissue lateral to the midrib and it is attached to the rock by a holdfast. The gametangia develop in conceptacles embedded in receptacles in the apices of the final branches. They may be monoecious or dioecious. These algae have a relatively simple life cycle and produce only one type of thallus which grows to a maximum size of 2 m. Fertile cavities, the conceptacles, conta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calcareous
Calcareous () is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines. In zoology ''Calcareous'' is used as an adjectival term applied to anatomical structures which are made primarily of calcium carbonate, in animals such as gastropods, i.e., snails, specifically about such structures as the operculum, the clausilium, and the love dart. The term also applies to the calcium carbonate tests of often more or less microscopic Foraminifera. Not all tests are calcareous; diatoms and radiolaria have siliceous tests. The molluscs are calcareous, as are calcareous sponges ( Porifera), that have spicules which are made of calcium carbonate. In botany ''Calcareous grassland'' is a form of grassland characteristic of soils containing much calcium carbonate from underlying chalk or limestone rock. In medicine The term is used in pathology, for example i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seaweed
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 practic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bryopsidales
Bryopsidales is an order of green algae, in the class Ulvophyceae. Characteristics The thallus is filamentous and much branched and may be packed into a mass. It is coenocytic, having multi-nucleate cells consisting of cytoplasm contained within a cylindrical cell wall. There are no septae and the many discoid chloroplasts, nuclei and other organelles are free to move through the organism. The whole organism may consist of a single cell and in the genus ''Caulerpa'' this may be several metres across. In the genus '' Halimeda'', whole seabed meadows may consist of an individual, single-celled organism connected by filamentous threads running through the substrate. Reproduction Propagation is normally vegetative from small fragments which grow into new individuals. Under certain conditions sexual reproduction occurs in a process called holocarpy. Almost all of the cytoplasm in the thallus is converted into biflagellate gametes, which are discharged into the sea through papillae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhizoid
Rhizoids are protuberances that extend from the lower epidermal cells of bryophytes and algae. They are similar in structure and function to the root hairs of vascular land plants. Similar structures are formed by some fungi. Rhizoids may be unicellular or multicellular. Evolutionary development Plants originated in aquatic environments and gradually migrated to land during their long course of evolution. In water or near it, plants could absorb water from their surroundings, with no need for any special absorbing organ or tissue. Additionally, in the primitive states of plant development, tissue differentiation and division of labor was minimal, thus specialized water absorbing tissue was not required. The development of specialized tissues to absorb water efficiently and anchor themselves to the ground enabled the spread of plants to the land. Description Rhizoids absorb water mainly by capillary action, in which water moves up between threads of rhizoids and not through ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seaweed
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 practic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Favia Fragum
''Favia'' is a genus of reef-building stony corals in the family Mussidae. Members of the genus are massive or thickly encrusting colonial corals, either dome-shaped or flat, and a few are foliaceous. There is a great diversity of form even among individuals of the same species. The corallites project slightly above the surface of the coral and each has its own wall. In most species, the corallites are plocoid and in some, monocentric. The septa and costae linked to the corallite wall are well developed and covered by fine teeth. The polyps only extend and feed during the night. Each one has a small number of tapering tentacles which often have a darker coloured tip; these are called stinger tentacles, or sweeper tentacles. They use these to sweep the water to see if any other coral is in its area; if so, then they begin to sting the other coral. This is commonly known as coral war. Each coral is trying to make sure it has enough room around it so it can continue to grow and have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
