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Bacidina Sorediata
''Bacidina sorediata'' is a species of foliicolous (leaf-dwelling) lichen in the family Ramalinaceae. Found in the Seychelles, it was described as new to science in 2011. It is characterized by its distinct sorediate thallus and pale yellow to orange apothecia. Taxonomy ''Bacidina sorediata'' was first scientifically described by lichenologists Mark Seaward and Robert Lücking as a new species in 2011. The species name ''sorediata'' is derived from the sorediate thallus, which is an unusual feature in the genus. The type specimen was found on Mahé island in the Seychelles on a path to Le Niol Road at an elevation of in January 1974. Description The ''Bacidina sorediata'' lichen has a foliicolous (leaf-dwelling) thallus, measuring across and 15–20 μm thick. The thallus appears due to the presence of minute, , granulose to microsquamulose patches. The lichen has a pale olive-green colour with yellowish-white soredia, which are initially separate but may become ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mark Seaward
Mark Richard David Seaward (born 10 August 1938) is a British ecologist and lichenologist. He was awarded the Acharius Medal in 2006 for lifetime contributions to lichenology. Life and career Seaward was born in Lincoln, England. He attended the University of Birmingham, graduating in 1959, and obtained an education diploma from the same institution a year later. While teaching at the Loughborough Training College, he obtained an MSc from the University of Nottingham in 1965. In 1967 he moved on to Trinity and All Saints College. Seaward earned a PhD from the University of Bradford in 1972. His thesis was about urban lichen ecology. He started employment at that university in 1974. In 1989 he was appointed as chair of Professor of Environmental Biology. He has continued as an honorary research professor since his retirement. Recognition The genus '' Seawardiella'' honours Seaward. Species that have been named after him include: '' Granulopyrenis seawardii'' ; ''Ramalina seawa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photosynthesis
Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities. Some of this chemical energy is stored in carbohydrate molecules, such as sugars and starches, which are synthesized from carbon dioxide and water – hence the name ''photosynthesis'', from the Greek ''phōs'' (), "light", and ''synthesis'' (), "putting together". Most plants, algae, and cyanobacteria perform photosynthesis; such organisms are called photoautotrophs. Photosynthesis is largely responsible for producing and maintaining the oxygen content of the Earth's atmosphere, and supplies most of the energy necessary for life on Earth. Although photosynthesis is performed differently by different species, the process always begins when energy from light is absorbed by proteins called reaction centers that contain green chlorophyll (and other colored) pigments/chromoph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichens Of Seychelles
A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.Introduction to Lichens – An Alliance between Kingdoms . University of California Museum of Paleontology. Lichens have properties different from those of their component organisms. They come in many colors, sizes, and forms and are sometimes plant-like, but are not s. They may have tiny, leafless branches (); flat leaf-like structures ( |
Bacidina
''Bacidina'' is a genus of lichens in the family Ramalinaceae. It was circumscribed by Czech lichenologist Antonín Vězda in 1990, with '' Bacidina phacodes'' assigned as the type species. Vězda included 11 species in ''Bacidina'', which was originally classified in the Lecideaceae. These species had previously been placed in genus '' Bacidia''. Species *'' Bacidina adastra'' *''Bacidina aeruginosa'' *'' Bacidina apiahica'' *''Bacidina arnoldiana'' *''Bacidina arvidssonii'' *''Bacidina assulata'' *'' Bacidina brandii'' *'' Bacidina brittoniana'' *'' Bacidina californica'' *''Bacidina caligans'' *''Bacidina canariensis'' *''Bacidina chloroticula'' *''Bacidina cinnamomea'' *''Bacidina circumpulla'' *''Bacidina clauzadei'' *''Bacidina contecta'' *''Bacidina convexa'' – Panama *''Bacidina crystallifera'' *''Bacidina defecta'' *'' Bacidina delicata'' *'' Bacidina dichroma'' *'' Bacidina digitalis'' *''Bacidina dissecta'' *''Bacidina egenula'' *'' Bacidin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archipelago
An archipelago ( ), sometimes called an island group or island chain, is a chain, cluster, or collection of islands, or sometimes a sea containing a small number of scattered islands. Examples of archipelagos include: the Indonesian Archipelago, the Aleutian Islands, the Lakshadweep Islands, the Galápagos Islands, the Japanese archipelago, the Philippine Archipelago, the Maldives, the Balearic Islands, the Åland Islands, The Bahamas, the Aegean Islands, the Hawaiian Islands, the Canary Islands, Malta, the Azores, the Canadian Arctic Archipelago, the British Isles, the islands of the Archipelago Sea, and Shetland. Archipelagos are sometimes defined by political boundaries. For example, while they are geopolitically divided, the San Juan Islands and Gulf Islands geologically form part of a larger Gulf Archipelago. Etymology The word ''archipelago'' is derived from the Ancient Greek ἄρχι-(''arkhi-'', "chief") and πέλαγος (''pélagos'', "sea") thr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacidina Scutellifera
''Bacidina'' is a genus of lichens in the family Ramalinaceae. It was circumscribed by Czech lichenologist Antonín Vězda in 1990, with ''Bacidina phacodes'' assigned as the type species. Vězda included 11 species in ''Bacidina'', which was originally classified in the Lecideaceae. These species had previously been placed in genus ''Bacidia''. Species *'' Bacidina adastra'' *'' Bacidina aeruginosa'' *'' Bacidina apiahica'' *'' Bacidina arnoldiana'' *'' Bacidina arvidssonii'' *''Bacidina assulata'' *'' Bacidina brandii'' *''Bacidina brittoniana'' *''Bacidina californica'' *''Bacidina caligans'' *''Bacidina canariensis'' *''Bacidina chloroticula'' *''Bacidina cinnamomea'' *''Bacidina circumpulla'' *''Bacidina clauzadei'' *''Bacidina contecta'' *''Bacidina convexa'' – Panama *''Bacidina crystallifera'' *''Bacidina defecta'' *''Bacidina delicata'' *'' Bacidina dichroma'' *'' Bacidina digitalis'' *''Bacidina dissecta'' *'' Bacidina egenula'' *'' Bacidina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacidina Defecta
''Bacidina'' is a genus of lichens in the family Ramalinaceae. It was circumscribed by Czech lichenologist Antonín Vězda in 1990, with '' Bacidina phacodes'' assigned as the type species. Vězda included 11 species in ''Bacidina'', which was originally classified in the Lecideaceae. These species had previously been placed in genus '' Bacidia''. Species *'' Bacidina adastra'' *''Bacidina aeruginosa'' *'' Bacidina apiahica'' *''Bacidina arnoldiana'' *''Bacidina arvidssonii'' *''Bacidina assulata'' *'' Bacidina brandii'' *'' Bacidina brittoniana'' *'' Bacidina californica'' *'' Bacidina caligans'' *'' Bacidina canariensis'' *'' Bacidina chloroticula'' *'' Bacidina cinnamomea'' *''Bacidina circumpulla'' *'' Bacidina clauzadei'' *''Bacidina contecta'' *'' Bacidina convexa'' – Panama *'' Bacidina crystallifera'' *'' Bacidina defecta'' *'' Bacidina delicata'' *'' Bacidina dichroma'' *'' Bacidina digitalis'' *''Bacidina dissecta'' *''Bacidina egenula'' *'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lichen Product
Lichen products, also known as lichen substances, are organic compounds produced by a lichen. Specifically, they are secondary metabolites. Lichen products are represented in several different chemical classes, including terpenoids, orcinol derivatives, chromones, xanthones, depsides, and depsidones. Over 800 lichen products of known chemical structure have been reported in the scientific literature, and most of these compound are exclusively found in lichens. Examples of lichen products include usnic acid (a dibenzofuran), atranorin (a depside), lichexanthone (a xanthone), salazinic acid (a depsidone), and isolichenan, an α-glucan. Many lichen products have biological activity, and research into these effects is ongoing. Lichen products accumulate on the outer walls of the fungal hyphae, and are quite stable. Crystal deposits can be visualised using scanning electron microscopy. For this reason, even very old herbarium specimens can be analysed. The amount of lichen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secondary Metabolism
Secondary metabolism (also called specialized metabolism) is a term for pathways and small molecule products of metabolism that are involved in ecological interactions, but are not absolutely required for the survival of the organism. These molecules are sometimes produced by specialized cells, such as laticifers in plants. Secondary metabolites commonly mediate antagonistic interactions, such as competition and predation, as well as mutualistic ones such as pollination and resource mutualisms. Examples of secondary metabolites include antibiotics, pigments and scents. The opposite of secondary metabolites are primary metabolites, which are considered to be essential to the normal growth or development of an organism. Secondary metabolites are produced by many microbes, plants, fungi and animals, usually living in crowded habitats, where chemical defense represents a better option than physical escape. It is very hard to distinguish primary and secondary metabolites due to ofte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
