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Climate Change and Invasive Species
Human-caused climate change and the rise in invasive species are directly linked through changing of ecosystems. This relationship is notable because climate change and invasive species are also considered by the USDA to be two of the top four causes of global biodiversity loss.
  • 503
  • 17 Nov 2022
Topic Review
Indian Remote Sensing Programme
India's remote sensing program was developed with the idea of applying space technologies for the benefit of human kind and the development of the country. The program involved the development of three principal capabilities. The first was to design, build and launch satellites to a sun synchronous orbit. The second was to establish and operate ground stations for spacecraft control, data transfer along with data processing and archival. The third was to use the data obtained for various applications on the ground.
  • 5.7K
  • 17 Nov 2022
Topic Review
List of Programs for Point Cloud Processing
This is an overview of programs for processing 3D point clouds from appropriate photos or surveys with laser scanners.
  • 999
  • 17 Nov 2022
Topic Review
Microplastic Pollution in Coastal Area of Black Sea
Plastic materials, degraded by physical and chemical processes, become micro- and nanoparticles. Microplastic pollution is a complex problem, as it is widespread and the exact harmful effects of long and short exposure are not known, although it certainly has considerable consequences for biota, the environment, and public health. The Black Sea is becoming a strategic area as a battle front and shipping route. This certainly influences the quality of the marine environment, and its microplastic pollution could degenerate into a much more unpleasant situation. Therefore, it is important to have a picture of this pollution in the Black Sea area to facilitate future efforts to understand the impact of this crisis.
  • 761
  • 17 Nov 2022
Topic Review
Exmoor Group
The Exmoor Group is a late Devonian to early Carboniferous lithostratigraphic group (a sequence of rock strata) in southwest England whose outcrop extends from Croyde in north Devon east across Exmoor to Minehead in west Somerset. Each of these divisions has been given different names by different authors in the past including those shown in brackets above. Some that had been classed as 'formations' (or even in one case as a 'group') are now 'members'.
  • 412
  • 16 Nov 2022
Topic Review
F-Ratio
In oceanic biogeochemistry, the f-ratio is the fraction of total primary production fuelled by nitrate (as opposed to that fuelled by other nitrogen compounds such as ammonium). The ratio was originally defined by Richard Eppley and Bruce Peterson in one of the first papers estimating global oceanic production. This fraction was originally believed significant because it appeared to directly relate to the sinking (export) flux of organic marine snow from the surface ocean by the biological pump. However, this interpretation relied on the assumption of a strong depth-partitioning of a parallel process, nitrification, that more recent measurements has questioned.
  • 580
  • 16 Nov 2022
Topic Review
Fossil Fuel Phase-Out
Fossil fuel phase-out is the gradual reduction of the use of fossil fuels to zero use. Current efforts in fossil fuel phase-out involve replacing fossil fuels with alternative energy sources in sectors such as transport, heating and industry.
  • 813
  • 16 Nov 2022
Topic Review
Pliosaurus
Pliosaurus (meaning 'more lizard') is an extinct genus of thalassophonean pliosaurid known from the Kimmeridgian and Tithonian stages (Late Jurassic) of Europe and South America. Their diet would have included fish, cephalopods, and marine reptiles. This genus has contained many species in the past but recent reviews found only six (P. brachydeirus, P. carpenteri, P. funkei, P. kevani, P. rossicus and P. westburyensis) to be valid, while the validity of two additional species awaits a petition to the International Code of Zoological Nomenclature. Currently, P. brachyspondylus and P. macromerus are considered dubious, while P. portentificus is considered undiagnostic. Most species of Pliosaurus reached 8 metres (26 ft) in length and 5 metric tons (5.5 short tons) in body mass, while P. rossicus and P. funkei may have reached or even exceeded 10 metres (33 ft) in length and 11 metric tons (12 short tons) in body mass, being the largest plesiosaurs of all time. Species of this genus are differentiated from other pliosaurids based on seven autapomorphies, including teeth that are triangular in cross section.
  • 751
  • 16 Nov 2022
Topic Review
Allosaurus
Allosaurus (/ˌæləˈsɔːrəs/) is a genus of large carnosaurian theropod dinosaur that lived 155 to 145 million years ago during the Late Jurassic epoch (Kimmeridgian to late Tithonian). The name "Allosaurus" means "different lizard" alluding to its unique (at the time of its discovery) concave vertebrae. It is derived from the Greek ἄλλος (allos) ("different, other") and σαῦρος (sauros) ("lizard / generic reptile"). The first fossil remains that could definitively be ascribed to this genus were described in 1877 by paleontologist Othniel Charles Marsh. As one of the first well-known theropod dinosaurs, it has long attracted attention outside of paleontological circles. Allosaurus was a large bipedal predator. Its skull was light, robust and equipped with dozens of sharp, serrated teeth. It averaged 8.5 meters (28 ft) in length for A. fragilis, with the largest specimens estimated as being 9.7 metres (32 ft) long. Relative to the large and powerful hindlimbs, its three-fingered forelimbs were small, and the body was balanced by a long and heavily muscled tail. It is classified as an allosaurid, a type of carnosaurian theropod dinosaur. The genus has a complicated taxonomy, and includes at least three valid species, the best known of which is A. fragilis. The bulk of Allosaurus remains have come from North America's Morrison Formation, with material also known from Portugal. It was known for over half of the 20th century as Antrodemus, but a study of the abundant remains from the Cleveland-Lloyd Dinosaur Quarry brought the name "Allosaurus" back to prominence and established it as one of the best-known dinosaurs. As the most abundant large predator in the Morrison Formation, Allosaurus was at the top of the food chain, probably preying on contemporaneous large herbivorous dinosaurs, and perhaps other predators. Potential prey included ornithopods, stegosaurids, and sauropods. Some paleontologists interpret Allosaurus as having had cooperative social behavior, and hunting in packs, while others believe individuals may have been aggressive toward each other, and that congregations of this genus are the result of lone individuals feeding on the same carcasses.
  • 2.3K
  • 16 Nov 2022
Topic Review
Strasburg, Virginia
Strasburg /ˈstrɑːzbɜːrɡ/ is a town in Shenandoah County, Virginia, United States , which was founded in 1761 by Peter Stover. It is the largest town by population in the county and is known for its grassroots art culture, pottery, antiques, and American Civil War history. Strasburg has blended the nostalgia of the past with the inspiration of the future. The population was 6,398 at the 2010 census.
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  • 16 Nov 2022
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