|
Magnolia Sharpii
''Magnolia sharpii'' is a tree species of ''Magnolia'' from Chiapas, Mexico. It grows in wet tropical habitats. Description ''Magnolia sharpii'' is a large tree, growing up to 25 meters tall with a trunk more than 50 cm in diameter. Range and habitat ''Magnolia sharpii'' is endemic to the Central Highlands of Chiapas, where it is known from scattered localities between 1,950 and 2,940 meters elevation. The species' estimated extent of occurrence (EOO) is 2,228 km2. Its typical habitat is on steep slopes or in ravines in cloud forests and humid oak and pine–oak forests. It favors mature closed-canopy forests dominated by oaks which sustain a cool and moist forest floor environment. It is shade-tolerant but intolerant of prolonged drought. Conservation and threats The species has a small, scattered population, and is threatened by severe deforestation across much of its range. It favors undisturbed forests which are becoming rarer across its range. Its conservation status i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IUCN Red List Of Threatened Species
The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biological species. It uses a set of precise criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. With its strong scientific base, the IUCN Red List is recognized as the most authoritative guide to the status of biological diversity. A series of Regional Red Lists are produced by countries or organizations, which assess the risk of extinction to species within a political management unit. The aim of the International Union for Conservation of Nature, IUCN Red List is to convey the urgency of conservation issues to the public and policy makers, as well as help the international community to reduce species extinction. According to International Unio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene is preceded by the Oligocene and is followed by the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, the Arabian Peninsula collided with Eurasia, severing the connection between the Mediterranean and Indian Ocean, and allowing a faunal interchange to occur between Eurasia and Africa, including the dispersal of proboscideans into Eurasia. During the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cloud Forest Flora Of Mexico
In meteorology, a cloud is an aerosol consisting of a visible mass of miniature liquid drop (liquid), droplets, ice crystals, frozen crystals, or other particulates, particles suspended in the atmosphere of a planetary body or similar space. Water or various other chemicals may compose the droplets and crystals. On Earth, clouds are formed as a result of saturation of the air when it is cooled to its dew point, or when it gains sufficient moisture (usually in the form of water vapor) from an adjacent source to raise the dew point to the ambient temperature. They are seen in the Earth's homosphere, which includes the troposphere, stratosphere, and mesosphere. Nephology is the science of clouds, which is undertaken in the cloud physics branch of meteorology. There are two methods of naming clouds in their respective layers of the homosphere, Latin and common name. Genus types in the troposphere, the atmospheric layer closest to Earth's surface, have Latin names because of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flora Of Chiapas
Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous) native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' gut flora'' or '' skin flora''. Etymology The word "flora" comes from the Latin name of Flora, the goddess of plants, flowers, and fertility in Roman mythology. The technical term "flora" is then derived from a metonymy of this goddess at the end of the sixteenth century. It was first used in poetry to denote the natural vegetation of an area, but soon also assumed the meaning of a work cataloguing such vegetation. Moreover, "Flora" was used to refer to the flowers of an artificial garden in the seventeenth century. The distinction between vegetation (the general appearance of a community) and flora (the taxonomic composition of a community) was first made by Jules Thurmann (1849). Prior to this, the two terms were used indiscriminately.Thurmann, J. (1849). ''Essai de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moss
Mosses are small, non-vascular flowerless plants in the taxonomic division Bryophyta (, ) '' sensu stricto''. Bryophyta (''sensu lato'', Schimp. 1879) may also refer to the parent group bryophytes, which comprise liverworts, mosses, and hornworts. Mosses typically form dense green clumps or mats, often in damp or shady locations. The individual plants are usually composed of simple leaves that are generally only one cell thick, attached to a stem that may be branched or unbranched and has only a limited role in conducting water and nutrients. Although some species have conducting tissues, these are generally poorly developed and structurally different from similar tissue found in vascular plants. Mosses do not have seeds and after fertilisation develop sporophytes with unbranched stalks topped with single capsules containing spores. They are typically tall, though some species are much larger. ''Dawsonia'', the tallest moss in the world, can grow to in height. There are a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bryology
Bryology (from Greek , a moss, a liverwort) is the branch of botany concerned with the scientific study of bryophytes (mosses, liverworts, and hornworts). Bryologists are people who have an active interest in observing, recording, classifying or researching bryophytes. The field is often studied along with lichenology due to the similar appearance and ecological niche of the two organisms, even though bryophytes and lichens are not classified in the same kingdom. History Bryophytes were first studied in detail in the 18th century. The German botanist Johann Jacob Dillenius (1687–1747) was a professor at Oxford and in 1717 produced the work "Reproduction of the ferns and mosses." The beginning of bryology really belongs to the work of Johannes Hedwig, who clarified the reproductive system of mosses (1792, ''Fundamentum historiae naturalist muscorum'') and arranged a taxonomy. Research Areas of research include bryophyte taxonomy, bryophytes as bioindicators, DNA sequencing, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Botany
Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek word (''botanē'') meaning " pasture", " herbs" "grass", or " fodder"; is in turn derived from (), "to feed" or "to graze". Traditionally, botany has also included the study of fungi and algae by mycologists and phycologists respectively, with the study of these three groups of organisms remaining within the sphere of interest of the International Botanical Congress. Nowadays, botanists (in the strict sense) study approximately 410,000 species of land plants of which some 391,000 species are vascular plants (including approximately 369,000 species of flowering plants), and approximately 20,000 are bryophytes. Botany originated in prehistory as herbalism with the efforts of early humans to identify – and later cultivate – ed ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aaron John Sharp
Aaron John Sharp (July 29, 1904 – November 16, 1997), known professionally as Jack Sharp, was an American botanist and bryologist, considered an expert on mosses. Early life Sharp was raised on a dairy farm near East Liberty, Ohio. He attended Ohio Wesleyan University and earned his degree in botany in 1927. After receiving his undergraduate degree, Sharp was introduced to bryology by George Elwood Nichols while taking his classes at the University of Michigan Biological Station. Sharp earned his M.S. from the University of Oklahoma while studying under Paul Sears in 1929. Career In 1929, Sharp moved to Knoxville, Tennessee and began teaching at the University of Tennessee. Although he was accepted into the Ph.D program at Yale University, financial troubles led him to complete his doctorate at Ohio State University in 1938. Sharp became a full professor at the University of Tennessee in 1946, and between 1951 and 1961, he was head of the Department of Botany. Sharp se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endangered Species
An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and invasive species. The International Union for Conservation of Nature (IUCN) Red List lists the global conservation status of many species, and various other agencies assess the status of species within particular areas. Many nations have laws that protect conservation-reliant species which, for example, forbid hunting, restrict land development, or create protected areas. Some endangered species are the target of extensive conservation efforts such as captive breeding and habitat restoration. Human activity is a significant cause in causing some species to become endangered. Conservation status The conservation status of a species indicates the likelihood that it will become extinct. Multiple factors are considered when assessing the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. 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. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Central American Pine–oak Forests
The Central American pine–oak forests is a tropical and subtropical coniferous forests ecoregion in the mountains of northern Central America and Chiapas state in southern Mexico. Setting The Central American pine–oak forests occupy an area of , extending along the mountainous spine of Central America, extending from the Sierra Madre de Chiapas and Chiapas Highlands in Mexico's Chiapas state through the highlands of Guatemala, El Salvador, and Honduras to central Nicaragua. The pine-oak forests lie between elevation. At lower elevations they transition to tropical moist forests on the Caribbean slope, and to tropical dry forests on the Pacific slope and interior valleys. Elevations above are often covered with cloud forest ecoregions, including the Sierra Madre de Chiapas moist forests in the Sierra Madre de Chiapas, the Chiapas montane forests along the northern slope of the Chiapas Highlands, and the Central American montane forests in high-elevation enclaves from sout ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiapas Montane Forests
The Chiapas montane forests is a tropical moist broadleaf forest ecoregion in southern Mexico and extending into western Guatemala. It includes the montane tropical forests on the northern and northeastern slopes of the Chiapas Highlands. Geography The Chiapas montane forests lie on the northern and northeastern slopes of the Chiapas highlands, between the lowland Petén–Veracruz moist forests to the north and east and the Central American pine–oak forests The Central American pine–oak forests is a tropical and subtropical coniferous forests ecoregion in the mountains of northern Central America and Chiapas state in southern Mexico. Setting The Central American pine–oak forests occupy an are ... in the higher mountains to the south. Climate The climate of the ecoregion is tropical and humid. The forests have a cooler climate than the adjacent lowlands, and average annual temperatures decrease with elevation. Flora The predominant plant community is mountain clou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
