|
Mountain Cottontail
The mountain cottontail or Nuttall's cottontail (''Sylvilagus nuttallii'') is a species of rabbit found in western Canada and the United States. It is a medium- to small-sized rabbit with pale brown fur, white undersides, a two-colored tail, and black-tipped, rounded ears with densely-furred insides. It has notably rusty-colored legs and an orange nape. The mountain cottontail appears largely among coniferous forests in mountainous regions, including the slopes of the Rocky Mountains and the Cascade-Sierra Nevada mountain ranges, and adapts to a variety of elevations and vegetation. Its diet is made up of various grasses, shrubs, and sagebrush, as well as twigs, bark or fungi in lesser amounts or when foliage is scarce. The mountain cottontail was first described in 1837 by naturalist John Bachman and was given the specific name ''nuttallii'' after zoologist Thomas Nuttall. Marcus Ward Lyon Jr. later placed the species in the genus ''Sylvilagus'' in 1904. The species is closely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hanford Site
The Hanford Site is a decommissioned nuclear production complex operated by the United States federal government on the Columbia River in Benton County in the U.S. state of Washington. It has also been known as SiteW and the Hanford Nuclear Reservation. Established in 1943 as part of the Manhattan Project, the site was home to the Hanford Engineer Works and B Reactor, the first full-scale plutonium production reactor in the world. Plutonium manufactured at the site was used in the first atomic bomb, which was tested in the Trinity nuclear test, and in the Fat Man bomb used in the bombing of Nagasaki. During the Cold War, the project expanded to include nine nuclear reactors and five large plutonium processing complexes, which produced plutonium for most of the more than 60,000 weapons built for the U.S. nuclear arsenal. Nuclear technology developed rapidly during this period, and Hanford scientists produced major technological achievements. The town of Richland, e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fungus
A fungus (: fungi , , , or ; or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and mold (fungus), molds, as well as the more familiar mushrooms. These organisms are classified as one of the kingdom (biology)#Six kingdoms (1998), traditional eukaryotic kingdoms, along with Animalia, Plantae, and either Protista or Protozoa and Chromista. A characteristic that places fungi in a different kingdom from plants, bacteria, and some protists is chitin in their cell walls. Fungi, like animals, are heterotrophs; they acquire their food by absorbing dissolved molecules, typically by secreting digestive enzymes into their environment. Fungi do not photosynthesize. Growth is their means of motility, mobility, except for spores (a few of which are flagellated), which may travel through the air or water. Fungi are the principal decomposers in ecological systems. These and other differences place fungi in a single group of related o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sympatry
In biology, two closely related species or populations are considered sympatric when they exist in the same geographic area and thus frequently encounter each other. An initially interbreeding population that splits into two or more distinct species sharing a common range exemplifies sympatric speciation. Such speciation may be a product of reproductive isolation – which prevents hybrid offspring from being viable or able to reproduce, thereby reducing gene flow – that results in genetic divergence. Sympatric speciation may, but need not, arise through secondary contact, which refers to speciation or divergence in allopatry followed by range expansions leading to an area of sympatry. Sympatric species or taxa in secondary contact may or may not interbreed. Types of populations Four main types of population pairs exist in nature. Sympatric populations (or species) contrast with parapatric populations, which contact one another in adjacent but not shared ranges and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leporidae
Leporidae () is the family of rabbits and hares, containing over 70 species of extant mammals in all. The family name comes from "Lepus", hare in Latin. Together with the pikas, the Leporidae constitute the mammalian order Lagomorpha. Leporidae differ from pikas in that they have short, furry tails and elongated ears and hind legs. The common name "rabbit" usually applies to all genera in the family except ''Lepus'', while members of ''Lepus'' (almost half the species) usually are called hares. Like most common names, however, the distinction does not match current taxonomy completely; jackrabbits are members of ''Lepus'', and members of the genera '' Pronolagus'' and '' Caprolagus'' sometimes are called hares. Various countries across all continents except Antarctica and Australia have indigenous species of Leporidae. Furthermore, rabbits, most significantly the European rabbit, ''Oryctolagus cuniculus'', also have been introduced to most of Oceania and to many other islands, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern Cottontail
The eastern cottontail (''Sylvilagus floridanus'') is a New World cottontail rabbit, a member of the family Leporidae. It is the most common rabbit species in North America. Distribution The eastern cottontail can be found in meadows and shrubby areas in the eastern and south-central United States, southern Canada, eastern Mexico, Central America and northernmost South America. It is also found on the Caribbean island of Margarita. It is abundant in Midwest North America. Its range expanded north as forests were cleared by settlers.Godin, Alfred J. (1977). ''Wild mammals of New England''. Baltimore, MD: The Johns Hopkins University Press Originally, it was not found in New England, but it has been introduced and now competes for habitat there with the native New England cottontail. It has also been introduced into parts of Oregon, Washington, and British Columbia. In the 1950s and 1960s, the eastern cottontail was introduced to France and northern Italy, where it displayed a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Climate Change
Present-day climate change includes both global warming—the ongoing increase in Global surface temperature, global average temperature—and its wider effects on Earth's climate system. Climate variability and change, Climate change in a broader sense also includes previous long-term changes to Earth's climate. The current rise in global temperatures is Scientific consensus on climate change, driven by human activities, especially fossil fuel burning since the Industrial Revolution. Fossil fuel use, Deforestation and climate change, deforestation, and some Greenhouse gas emissions from agriculture, agricultural and Environmental impact of concrete, industrial practices release greenhouse gases. These gases greenhouse effect, absorb some of the heat that the Earth Thermal radiation, radiates after it warms from sunlight, warming the lower atmosphere. Carbon dioxide, the primary gas driving global warming, Carbon dioxide in Earth's atmosphere, has increased in concentratio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species Distribution
Species distribution, or species dispersion, is the manner in which a biological taxon is spatially arranged. The geographic limits of a particular taxon's distribution is its range, often represented as shaded areas on a map. Patterns of distribution change depending on the scale at which they are viewed, from the arrangement of individuals within a small family unit, to patterns within a population, or the distribution of the entire species as a whole (range). Species distribution is not to be confused with biological dispersal, dispersal, which is the movement of individuals away from their center of origin, region of origin or from a population center of high population density, density. Range In biology, the range of a species is the geographical area within which that species can be found. Within that range, distribution is the general structure of the species population, while dispersion is the variation in its population density. Range is often described with the foll ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subspecies
In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morphology), but that can successfully interbreed. Not all species have subspecies, but for those that do there must be at least two. Subspecies is abbreviated as subsp. or ssp. and the singular and plural forms are the same ("the subspecies is" or "the subspecies are"). In zoology, under the International Code of Zoological Nomenclature, the subspecies is the only taxonomic rank below that of species that can receive a name. In botany and mycology, under the International Code of Nomenclature for algae, fungi, and plants, other infraspecific name, infraspecific ranks, such as variety (botany), variety, may be named. In bacteriology and virology, under standard International Code of Nomenclature of Prokaryotes, bacterial nomenclature and virus clas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marsh Rabbit
The marsh rabbit (''Sylvilagus palustris'') is a small cottontail rabbit found in marshes and swamps of coastal regions of the Eastern and Southern United States. It is a strong swimmer and found only near regions of water. It is similar in appearance to the eastern cottontail (''Sylvilagus floridanus'') but is characterized by smaller ears, legs, and tail. Taxonomy and etymology The scientific name ''Sylvilagus palustris'' derives from a combination of the Latin words ''silva'' ("forest") and ''lagos'' ("hare"), plus ''palustris'' ("of the marsh").Archibald William Smith The marsh rabbit has commonly been associated with the group of swamp rabbits; however, this name is not a synonym and should not be confused with the larger swamp rabbit ''(Sylvilagus aquaticus)'' of Alabama through Texas. Marsh rabbits have also often been referred to as ''marsh hares''. Phylogeny In the subgenus ''Tapeti'' in the genus ''Sylvilagus'', marsh rabbits and swamp rabbits share a chromosomal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Swamp Rabbit
The swamp rabbit (''Sylvilagus aquaticus''), also known as the cane cutter, swamper, or cane jake, is a species of cottontail rabbit found in the swamps and wetlands of the southern United States. It is herbivorous, territorial, and nocturnal. The largest of the cottontail rabbits, it is similar in appearance to the eastern cottontail, but has distinctly smaller ears and orange-colored hind legs. Swamp rabbits are closely related to the marsh rabbit. The two species likely separated during the Pleistocene epoch. The swamp rabbit is most abundant in Alabama, Mississippi, and Louisiana, and also inhabits South Carolina, Arkansas, Tennessee, Texas, Oklahoma, Missouri, Kentucky, Illinois, Indiana, Georgia. Its habitat is largely dominated by regions near lowland water. Unlike other cottontail rabbits, the swamp rabbit is territorial and maintains a social order between higher- and lower-ranking males and females via displays of dominance, vocalizations, and occasional fighting. Thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desert Cottontail
The desert cottontail (''Sylvilagus audubonii''), also known as Audubon's cottontail, is a New World cottontail rabbit, and a member of the family Leporidae. Unlike the European rabbit (''Oryctolagus cuniculus''), they do not form social burrow systems, but compared with some other leporids, they are extremely tolerant of other individuals in their vicinity. Cottontails give birth to their kits in burrows vacated by other mammals. They sometimes cool off, or take refuge in scratched out shallow created depressions of their own making, using their front paws like a back hoe. They are not usually active in the middle of the day, but can be observed foraging in the early morning, and early evening. Cottontails are rarely found out of their burrows looking for food on windy days, because the wind interferes with their ability to hear approaching predators, their primary defense mechanism. Lifespan The lifespan of a cottontail that reaches adulthood averages less than two years, de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sylvilagus
Cottontail rabbits are in the ''Sylvilagus'' genus, which is in the family Leporidae. They are found in the Americas. Most ''Sylvilagus'' species have stub tails with white undersides that show when they retreat, giving them their characteristic name. However, this feature is not present in all ''Sylvilagus'', nor is it unique to the genus. However their fur ranges from brown to gray and changes throughout the year, depending on the season. The genus is widely distributed across North America, Central America, and northern and central South America, though most species are confined to particular regions. Most species live in nests called forms, and all have altricial young. They often live on the edges of fields, farms, and other open spaces far from highly populated areas. But sometimes they make their nests in yards and parks near more people. An adult female averages three litters per year, which can be born in any season. Occurrence and litter size depend on several factor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
