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Aspidostemon Antongilensis
''Aspidostemon'' is a genus of flowering plants belonging to the family Lauraceae. It occurs in Madagascar. Taxonomy The genus was described by Jens Gunter Rohwer & Hans Georg Richter in ''Jahrbuch für Botanische Systematik, Pflanzengeschichte und Pflanzengeographie'' 109 (1): 74 in 1987. The type species is ''Aspidostemon perrieri'' ( Danguy) Rohwer. The number of collections available is not large. The identification was done at the Missouri Botanical Garden. Description They are shrubs or trees up to 25 m high, hermaphrodites. The leaves are entire, elliptical or narrowly elliptical. The fruit is a berry-like drupe dispersed mostly by birds. ''Aspidostemon'' species are no exception among the Lauraceae; they are trees with small flowers, hard to detect and collect and often overlooked or ignored when plants easier to collect or with showier flowers are at hand. ''Aspidostemon'' is characterized by its opposite leaves, flowers with three or six stamens (compared to 9 in ''C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jens Gunter Rohwer
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Jens may refer to: * Jens (given name), a list of people with the name * Jens (surname), a list of people * Jens, Switzerland, a municipality * 1719 Jens, an asteroid See also * Jensen (other) * Jenssi Joensuu (; krl, Jovensuu; ) is a city and municipality in North Karelia, Finland, located on the northern shore of Lake Pyhäselkä (northern part of Lake Saimaa) at the mouth of the Pielinen River (''Pielisjoki''). It was founded in 1848. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Habitat
In ecology, the term habitat summarises the array of resources, physical and biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species habitat can be seen as the physical manifestation of its ecological niche. Thus "habitat" is a species-specific term, fundamentally different from concepts such as environment or vegetation assemblages, for which the term "habitat-type" is more appropriate. The physical factors may include (for example): soil, moisture, range of temperature, and light intensity. Biotic factors will include the availability of food and the presence or absence of predators. Every species has particular habitat requirements, with habitat generalist species able to thrive in a wide array of environmental conditions while habitat specialist species requiring a very limited set of factors to survive. The habitat of a species is not necessarily found in a geographical area, it can be the interior ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aspidostemon Apiculatus
''Aspidostemon'' is a genus of flowering plants belonging to the family Lauraceae. It occurs in Madagascar. Taxonomy The genus was described by Jens Gunter Rohwer & Hans Georg Richter in ''Jahrbuch für Botanische Systematik, Pflanzengeschichte und Pflanzengeographie'' 109 (1): 74 in 1987. The type species is ''Aspidostemon perrieri'' ( Danguy) Rohwer. The number of collections available is not large. The identification was done at the Missouri Botanical Garden. Description They are shrubs or trees up to 25 m high, hermaphrodites. The leaves are entire, elliptical or narrowly elliptical. The fruit is a berry-like drupe dispersed mostly by birds. ''Aspidostemon'' species are no exception among the Lauraceae; they are trees with small flowers, hard to detect and collect and often overlooked or ignored when plants easier to collect or with showier flowers are at hand. ''Aspidostemon'' is characterized by its opposite leaves, flowers with three or six stamens (compared to 9 in ''C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aspidostemon Antongilensis
''Aspidostemon'' is a genus of flowering plants belonging to the family Lauraceae. It occurs in Madagascar. Taxonomy The genus was described by Jens Gunter Rohwer & Hans Georg Richter in ''Jahrbuch für Botanische Systematik, Pflanzengeschichte und Pflanzengeographie'' 109 (1): 74 in 1987. The type species is ''Aspidostemon perrieri'' ( Danguy) Rohwer. The number of collections available is not large. The identification was done at the Missouri Botanical Garden. Description They are shrubs or trees up to 25 m high, hermaphrodites. The leaves are entire, elliptical or narrowly elliptical. The fruit is a berry-like drupe dispersed mostly by birds. ''Aspidostemon'' species are no exception among the Lauraceae; they are trees with small flowers, hard to detect and collect and often overlooked or ignored when plants easier to collect or with showier flowers are at hand. ''Aspidostemon'' is characterized by its opposite leaves, flowers with three or six stamens (compared to 9 in ''C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aspidostemon Andohahelensis
''Aspidostemon'' is a genus of flowering plants belonging to the family Lauraceae. It occurs in Madagascar. Taxonomy The genus was described by Jens Gunter Rohwer & Hans Georg Richter in ''Jahrbuch für Botanische Systematik, Pflanzengeschichte und Pflanzengeographie'' 109 (1): 74 in 1987. The type species is '' Aspidostemon perrieri'' ( Danguy) Rohwer. The number of collections available is not large. The identification was done at the Missouri Botanical Garden. Description They are shrubs or trees up to 25 m high, hermaphrodites. The leaves are entire, elliptical or narrowly elliptical. The fruit is a berry-like drupe dispersed mostly by birds. ''Aspidostemon'' species are no exception among the Lauraceae; they are trees with small flowers, hard to detect and collect and often overlooked or ignored when plants easier to collect or with showier flowers are at hand. ''Aspidostemon'' is characterized by its opposite leaves, flowers with three or six stamens (compared to 9 in '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammal
Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or hair, and three middle ear bones. These characteristics distinguish them from reptiles (including birds) from which they diverged in the Carboniferous, over 300 million years ago. Around 6,400 extant species of mammals have been described divided into 29 orders. The largest orders, in terms of number of species, are the rodents, bats, and Eulipotyphla (hedgehogs, moles, shrews, and others). The next three are the Primates (including humans, apes, monkeys, and others), the Artiodactyla ( cetaceans and even-toed ungulates), and the Carnivora (cats, dogs, seals, and others). In terms of cladistics, which reflects evolutionary history, mammals are the only living members of the Synapsida (synapsids); this clade, together with Saur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seed Dispersal
In Spermatophyte plants, seed dispersal is the movement, spread or transport of seeds away from the parent plant. Plants have limited mobility and rely upon a variety of dispersal vectors to transport their seeds, including both abiotic vectors, such as the wind, and living ( biotic) vectors such as birds. Seeds can be dispersed away from the parent plant individually or collectively, as well as dispersed in both space and time. The patterns of seed dispersal are determined in large part by the dispersal mechanism and this has important implications for the demographic and genetic structure of plant populations, as well as migration patterns and species interactions. There are five main modes of seed dispersal: gravity, wind, ballistic, water, and by animals. Some plants are serotinous and only disperse their seeds in response to an environmental stimulus. These modes are typically inferred based on adaptations, such as wings or fleshy fruit. However, this simplified view may ignor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biological Dispersal
Biological dispersal refers to both the movement of individuals (animals, plants, fungi, bacteria, etc.) from their birth site to their breeding site ('natal dispersal'), as well as the movement from one breeding site to another ('breeding dispersal'). Dispersal is also used to describe the movement of propagules such as seeds and spores. Technically, dispersal is defined as any movement that has the potential to lead to gene flow. The act of dispersal involves three phases: departure, transfer, settlement and there are different fitness costs and benefits associated with each of these phases. Through simply moving from one habitat patch to another, the dispersal of an individual has consequences not only for individual fitness, but also for population dynamics, population genetics, and species distribution. Understanding dispersal and the consequences both for evolutionary strategies at a species level, and for processes at an ecosystem level, requires understanding on th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lauroide
This glossary of botanical terms is a list of definitions of terms and concepts relevant to botany and plants in general. Terms of plant morphology are included here as well as at the more specific Glossary of plant morphology and Glossary of leaf morphology. For other related terms, see Glossary of phytopathology, Glossary of lichen terms, and List of Latin and Greek words commonly used in systematic names. A B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trunk (botany)
In botany, the trunk (or bole) is the plant stem, stem and main wooden axis of a tree, which is an important feature in tree identification, and which often differs markedly from the bottom of the trunk to the top, depending on the species. The trunk is the most important part of the tree for timber production. Occurrence Trunks occur both in "true" woody plants and non-woody plants such as palm (plant), palms and other Monocotyledon, monocots, though the internal physiology is different in each case. In all plants, trunks thicken over time due to the formation of secondary growth (or in monocots, pseudo-secondary growth). Trunks can be vulnerable to damage, including sunburn. Vocabulary Trunks which are cut down for making lumber are generally called logs; if they are cut to a specific length, called bolts. The term "log" is informally used in English language, English to describe any felled trunk not rooted in the ground, whose roots are detached. A tree stump, stump is the pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Loss Of Habitat
Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby reducing biodiversity and species abundance. Habitat destruction is the leading cause of biodiversity loss. Fragmentation and loss of habitat have become one of the most important topics of research in ecology as they are major threats to the survival of endangered species. Activities such as harvesting natural resources, industrial production and urbanization are human contributions to habitat destruction. Pressure from agriculture is the principal human cause. Some others include mining, logging, trawling, and urban sprawl. Habitat destruction is currently considered the primary cause of species extinction worldwide. Environmental factors can contribute to habitat destruction more indirectly. Geological processes, climate change, introdu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Timber Extraction
Logging is the process of cutting, processing, and moving trees to a location for transport. It may include skidding, on-site processing, and loading of trees or logs onto trucks or skeleton cars. Logging is the beginning of a supply chain that provides raw material for many products societies worldwide use for housing, construction, energy, and consumer paper products. Logging systems are also used to manage forests, reduce the risk of wildfires, and restore ecosystem functions, though their efficiency for these purposes has been challenged. In forestry, the term logging is sometimes used narrowly to describe the logistics of moving wood from the stump to somewhere outside the forest, usually a sawmill or a lumber yard. In common usage, however, the term may cover a range of forestry or silviculture activities. Illegal logging refers to the harvesting, transportation, purchase, or sale of timber in violation of laws. The harvesting procedure itself may be illegal, includin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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