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Erioderma Pedicellatum
''Erioderma pedicellatum'' is a medium-sized, foliose lichen in the family Pannariaceae, commonly called the boreal felt lichen. It grows on trees in damp boreal forests along the Atlantic coast in Canada, as well as in southcentral Alaska and in the Kamchatka Peninsula.Nelson, P, J Walton and C Roland. 2009. ''Erioderma pedicellatum'' (Hue) P.M.Jorg, new to the United States and western North America, discovered in Denali National Park and Preserve and Denali State Park, Alaska. Evansia 26: 19 – 23. Description ''Erioderma pedicellatum'' is a foliose cyanolichen with lobes 2–5 cm across, and occasionally reaching 12 cm in diameter. It has a distinctively fuzzy upper surface that is greyish-brown when dry, and slate-blue when moist. Its underside is white, and its edges usually curl upwards, giving it the appearance of having a white fringe. It differs from the two other North American species of '' Erioderma'' by lacking soredia, and by having small, reddish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auguste-Marie Hue
Father Auguste-Marie Hue (15 August 1840– 22 June 1917) was a French lichenologist. Biography Hue was born on 15 August 1840, in Saint-Saëns, Seine-Maritime. He was Ordination, ordained as a priest in 1865. From 1890 to 1915 he was a chaplain at the Petites Sœurs des Pauvres in Levallois-Perret. He studied the lichens collected by the Philippe Thomas#Career, scientific expedition to Tunisia, the reports of which were published by Narcisse Théophile Patouillard (1854–1926). He also studied the lichens brought back by the French Antarctic Expeditions (1903–1905 and 1908–1910), commanded by Jean-Baptiste Charcot (1867–1936). Father (1832–1900) sent him specimens collected in Louisiana. Hue has been credited for having introduced the lichen term in an 1906 publication. Hue died on 22 June 1917, in Levallois-Perret. n 1938, Carroll William Dodge and Gladys Elizabeth Baker published ''Huea'', which is a genus of lichenized fungi in the family Lecanoraceae and named in H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balsam Fir
''Abies balsamea'' or balsam fir is a North American fir, native to most of eastern and central Canada (Newfoundland west to central Alberta) and the northeastern United States (Minnesota east to Maine, and south in the Appalachian Mountains to West Virginia). Description Balsam fir is a small to medium-size evergreen tree typically tall, occasionally reaching a height of . The narrow conic crown consists of dense, dark-green leaves. The bark on young trees is smooth, grey, and with resin blisters (which tend to spray when ruptured), becoming rough and fissured or scaly on old trees. The leaves are flat and needle-like, long, dark green above often with a small patch of stomata near the tip, and two white stomatal bands below, and a slightly notched tip. They are arranged spirally on the shoot, but with the leaf bases twisted so that the leaves appear to be in two more-or-less horizontal rows on either side of the shoot. The needles become shorter and thicker the higher they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyanobacteria
Cyanobacteria (), also known as Cyanophyta, are a phylum of gram-negative bacteria that obtain energy via photosynthesis. The name ''cyanobacteria'' refers to their color (), which similarly forms the basis of cyanobacteria's common name, blue-green algae, although they are not usually scientifically classified as algae. They appear to have originated in a freshwater or terrestrial environment. Sericytochromatia, the proposed name of the paraphyletic and most basal group, is the ancestor of both the non-photosynthetic group Melainabacteria and the photosynthetic cyanobacteria, also called Oxyphotobacteria. Cyanobacteria use photosynthetic pigments, such as carotenoids, phycobilins, and various forms of chlorophyll, which absorb energy from light. Unlike heterotrophic prokaryotes, cyanobacteria have internal membranes. These are flattened sacs called thylakoids where photosynthesis is performed. Phototrophic eukaryotes such as green plants perform photosynthesis in plast ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scytonema
''Scytonema'' is a genus of photosynthetic cyanobacteria that contains over 100 species. It grows in filaments that form dark mats. Many species are aquatic and are either free-floating or grow attached to a submerged substrate, while others species grow on terrestrial rocks, wood, soil, or plants. ''Scytonema'' is a nitrogen fixer, and can provide fixed nitrogen to the leaves of plants on which it is growing. Some species of ''Scytonema'' form a symbiotic relationship with fungi to produce a lichen. Scyptolins are a type of elastase inhibitors isolated from some species of ''Scytonema''. A study comparing red macroalgae to ''Scytonema'' species showed their potential for cosmetical use, both for their antioxidant Antioxidants are compounds that inhibit oxidation, a chemical reaction that can produce free radicals. This can lead to polymerization and other chain reactions. They are frequently added to industrial products, such as fuels and lubricant ...s propertie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexual Reproduction
Sexual reproduction is a type of reproduction that involves a complex life cycle in which a gamete ( haploid reproductive cells, such as a sperm or egg cell) with a single set of chromosomes combines with another gamete to produce a zygote that develops into an organism composed of cells with two sets of chromosomes ( diploid). This is typical in animals, though the number of chromosome sets and how that number changes in sexual reproduction varies, especially among plants, fungi, and other eukaryotes. Sexual reproduction is the most common life cycle in multicellular eukaryotes, such as animals, fungi and plants. Sexual reproduction also occurs in some unicellular eukaryotes. Sexual reproduction does not occur in prokaryotes, unicellular organisms without cell nuclei, such bacteria and archaea. However, some process in bacteria may be considered analogous to sexual reproduction in that they incorporate new genetic information, including bacterial conjugation, transformatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clearcutting
Clearcutting, clearfelling or clearcut logging is a forestry/ logging practice in which most or all trees in an area are uniformly cut down. Along with shelterwood and seed tree harvests, it is used by foresters to create certain types of forest ecosystems and to promote select species that require an abundance of sunlight or grow in large, even-age stands. Logging companies and forest-worker unions in some countries support the practice for scientific, safety and economic reasons, while detractors consider it a form of deforestation that destroys natural habitats and contributes to climate change. Clearcutting is the most common and economically profitable method of logging. However, it also may create detrimental side effects, such as the loss of topsoil, the costs of which are intensely debated by economic, environmental and other interests. In addition to the purpose of harvesting wood, clearcutting is used to create land for farming. Ultimately, the effects of clearcutt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Old Growth Forests
An old-growth forestalso termed primary forest, virgin forest, late seral forest, primeval forest, or first-growth forestis a forest that has attained great age without significant disturbance, and thereby exhibits unique ecological features, and might be classified as a climax community. The Food and Agriculture Organization of the United Nations defines primary forests as naturally regenerated forests of native tree species where there are no clearly visible indications of human activity and the ecological processes are not significantly disturbed. More than one-third (34 percent) of the world's forests are primary forests. Old-growth features include diverse tree-related structures that provide diverse wildlife habitat that increases the biodiversity of the forested ecosystem. Virgin or first-growth forests are old-growth forests that have never been logged. The concept of diverse tree structure includes multi-layered canopies and canopy gaps, greatly varying tree height ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frullania Asagrayana
''Frullania asagrayana'' is a reddish-brown species of liverwort in the family Frullaniaceae that grows in eastern North America. Taxonomy and naming ''Frullania asagrayana'' was first described in 1842 by Camille Montagne, a French bryologist and mycologist, and named after the American botanist Asa Gray.Crandall-Stotler, Barbara, Raymond E. Stotler, and Patricia Geissler. (1987). A biosystematic study of the subspecies of ''Frullania tamarisci'' (L.). ''The Bryologist'' 90(4): 287–308. It remained a species under that name until 1966, when Japanese bryologist Shinji Hattori combined ''F. asagrayana'' and three other species of ''Frullania'' and made them all subspecies of ''Frullania tamarisci''. These four species looked similar, but lived in different parts of the world. They were ''F. tamarisci'' from Europe, ''F. asagrayana'' from eastern North America, ''F. nisquallensis'' from the northern Pacific coast of North America and Siberia, and ''F. moniliata'' from India ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marchantiophyta
The Marchantiophyta () are a division of non-vascular land plants commonly referred to as hepatics or liverworts. Like mosses and hornworts, they have a gametophyte-dominant life cycle, in which cells of the plant carry only a single set of genetic information. It is estimated that there are about 9000 species of liverworts. Some of the more familiar species grow as a flattened leafless thallus, but most species are leafy with a form very much like a flattened moss. Leafy species can be distinguished from the apparently similar mosses on the basis of a number of features, including their single-celled rhizoids. Leafy liverworts also differ from most (but not all) mosses in that their leaves never have a costa (present in many mosses) and may bear marginal cilia (very rare in mosses). Other differences are not universal for all mosses and liverworts, but the occurrence of leaves arranged in three ranks, the presence of deep lobes or segmented leaves, or a lack of clearly diff ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epiphyte
An epiphyte is an organism that grows on the surface of a plant and derives its moisture and nutrients from the air, rain, water (in marine environments) or from debris accumulating around it. The plants on which epiphytes grow are called phorophytes. Epiphytes take part in nutrient cycles and add to both the diversity and biomass of the ecosystem in which they occur, like any other organism. They are an important source of food for many species. Typically, the older parts of a plant will have more epiphytes growing on them. Epiphytes differ from parasites in that they grow on other plants for physical support and do not necessarily affect the host negatively. An organism that grows on another organism that is not a plant may be called an epibiont. Epiphytes are usually found in the temperate zone (e.g., many mosses, liverworts, lichens, and algae) or in the tropics (e.g., many ferns, cacti, orchids, and bromeliads). Epiphyte species make good houseplants due to their minimal wat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Betula Cordifolia
''Betula cordifolia'', the mountain paper birch (also known as mountain white birch or eastern paper birch) is a birch species native to Eastern Canada and the Northeastern United States. Until recently it was considered a variety of ''Betula papyrifera'' (paper birch), with which it shares many characteristics, and it was classified as ''B. papyrifera'' var.'' cordifolia'' (Regel) Fern.Farrar, J. L. (1995). ''Trees in Canada''. Markham: Fitzhenry and Whiteside Ltd. Description ''Betula cordifolia'' is a deciduous tree that reaches heights of about 60 feet or 25 m and a trunk diameter of about 30 inches or about 75 cm.Powell, G., Beardmore, T. ''New Brunswick Species of Concern: A field guide''. p.17–19. Retrieved from Mature bark is white or bronze-white, peeling in thin layers. The inner surface of the bark is copper-coloured and the young bark is shiny brown with pale brown lenticels. The leaves are alternate, ovate, 6–12 cm long, and double-toothe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
