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"aphotic" Definitions
  1. being the deep zone of an ocean or lake receiving too little light to permit photosynthesis

60 Sentences With "aphotic"

How to use aphotic in a sentence? Find typical usage patterns (collocations)/phrases/context for "aphotic" and check conjugation/comparative form for "aphotic". Mastering all the usages of "aphotic" from sentence examples published by news publications.

Weep in transported ecstasy as his aphotic pelage incandesces anew beneath the featherweight legions of efflugent minutiae.
In 2016, best warehouse booths I had a chance to play at were probably at Aphotic and Unter events.
The need for a nearly aphotic space to preserve fabrics was deemed unnecessary since all 140 outfits came directly from the archives of Comme des Garçons, instead of private collectors or the museum.
Preorders for Aphotic Gloom are now live, via Proesthetic and tickets for the 'Curse of the Dead' tour are on sale now—don't fuck up your chance to see one of the sickest metal tours of 2016!
With the release of a new EP, Aphotic Gloom, rapidly approaching and a new singer (Adam Clemens, who joined earlier this year following prior stints in Wolvhammer and Veil of Maya) to break in, it makes perfect sense that beloved Ohio black/thrashers Skeletonwitch will be hitting the road hard all year.
In the ocean, the aphotic zone is sometimes referred to as the dark ocean. Depending on how it is defined, the aphotic zone of the ocean begins between depths of about to and extends to the ocean floor. The depth at which the aphotic zone begins in the ocean depends on many factors. In clear, tropical water sunlight can penetrate deeper and so the aphotic zone starts at greater depths.
The layers of the pelagic zone. All but the epipelagic zone make up the aphotic zone. The aphotic zone (aphotic from Greek prefix + "without light") is the portion of a lake or ocean where there is little or no sunlight. It is formally defined as the depths beyond which less than 1 percent of sunlight penetrates.
Zones which vary by the amount of light they receive include the photic and aphotic zones. Much of the aphotic zone's energy is supplied by the open ocean in the form of detritus.
Fluorescence can occur in organisms in the aphotic zone as a byproduct of that same organism's bioluminescence. Some fluorescence in the aphotic zone is merely a byproduct of the organism's tissue biochemistry and does not have a functional purpose. However, some cases of functional and adaptive significance of fluorescence in the aphotic zone of the deep ocean is an active area of research.
Around the poles, the angle of the sunlight means it does not penetrate as deeply so the aphotic zone is shallower. If the water is turbid, suspended material can block light from penetrating resulting in a shallower aphotic zone. Temperatures can range from roughly to . The aphotic zone is further divided into the mesopelagic zone, the bathyal zone, the abyssal zone, and the hadal zone.
The profundal zone is often part of the aphotic zone. Sediment in the profundal zone primarily comprises silt and mud.
Flow chart of nitrification in the deep ocean (aphotic zone) and ammonium regeneration in the upper ocean surface (photic zone).
The aphotic zone underlies the photic zone, which is that portion of a lake or ocean directly affected by sunlight.
Hydrothermal vents are the primary source of energy in what is known as the aphotic zone (depths exceeding 200 m). The pelagic part of the photic zone is known as the epipelagic. The pelagic part of the aphotic zone can be further divided into vertical regions according to temperature. The mesopelagic is the uppermost region.
Though photosynthesis cannot occur in the aphotic zone, it is not unusual to find an abundance of phytoplankton there. Convective mixing due to cooling surface water sinking can increase the concentration of phytoplankton in the aphotic zone and lead to under-estimations of primary production in the euphotic zone during convective mixing events. Unusual and unique creatures dwell in this expanse of pitch black water, such as the gulper eel, the giant squid, the anglerfish, and the vampire squid. Some life in the aphotic zone does not rely on sunlight at all.
The Aphotic Season is the second studio album by October Sky, released worldwide on June 18, 2012 with Rocksector Records, a Manchester-based record label.
Above the aphotic zone is the photic zone, which consists of the euphotic zone and the disphotic zone. The euphotic zone is the layer of water in which there is enough light for net photosynthesis to occur. The disphotic zone, also known as the twilight zone, is the layer of water with enough light for predators to see but not enough for the rate of photosynthesis to be greater than the rate of respiration. The depth at which less than one percent of sunlight reaches begins the aphotic zone. While most of the ocean’s biomass lives in the photic zone, the majority of the ocean’s water lies in the aphotic zone.
In relation to lake zonation, the pelagic and benthic zones are considered to lie within the photic region, while the profundal zone is in the aphotic region.
In the ocean, this leads to a vertical separation of nitrification from primary production, and confines it to the aphotic zone. This leads to the situation whereby any nitrate in the water column must be from the aphotic zone, and must have originated from organic material transported there by sinking. Primary production fuelled by nitrate is, therefore, making use of a "fresh" nutrient source rather than a regenerated one. Production by nitrate is thus referred to as new production.
In the ocean, this leads to a vertical separation of nitrification from primary production, and confines it to the aphotic zone. This leads to the situation whereby any nitrate in the water column must be from the aphotic zone, and must have originated from organic material transported there by sinking. Primary production fuelled by nitrate is, therefore, making use of a "fresh" nutrient source rather than a regenerated one. Production by nitrate is thus referred to as new production.
To date, October Sky have released two full-length albums - Hell Isn't My Home (2008) and The Aphotic Season (2012), and three EPs - October Sky EP (2006), Green and Beautiful EP (2010), Rise (2015).
For information on animals that live in the deeper areas of the oceans see aphotic zone. Generally, these include life forms that tolerate cool temperatures and low oxygen levels, but this depends on the depth of the water.
In the deep ocean, marine snow is a continuous shower of mostly organic detritus falling from the upper layers of the water column. It is a significant means of exporting energy from the light-rich photic zone to the aphotic zone below which is referred to as the biological pump. Export production is the amount of organic matter produced in the ocean by primary production that is not recycled (remineralised) before it sinks into the aphotic zone. Because of the role of export production in the ocean's biological pump, it is typically measured in units of carbon (e.g.
The album has received relatively good reviews in the European countries. According to PlanetMosh.com, a heavy metal webzine in the United Kingdom, The Aphotic Season was given 8/10. It was also compared to the sound of Thirty Seconds to Mars and early Muse.
It is estimated to be 8600–8700 years old.Wisshak, M. and Ruggeberg, A. (2006). Colonisation and bioerosion of experimental substrates by benthic foraminiferans from euphotic to aphotic depths (Kosterfjord, SW Sweden). Facies 52: 1–17. The Tisler Reef contains the world’s only known yellow L. pertusa.
The average temperature of the inner cave wall is reported to be about . Sulfur springs discharge into the cave passages causing corrosion of limestone. The spring waters display floating mucus-like biofilms. These are thick orange microbial mats ( thick) with patches of yellow biofilms extending from the aphotic deep cave orifice.
Novodina americana is a species of starfish found of the coast of Greenland. A 2018 study of deep-water starfish species found that N. americana was both bioluminescent and, unexpectedly for an inhabitant of the aphotic zone, to have eyes that have among the highest resolutions found this far among starfish.
Bioluminescence is more abundant than sunlight in this zone. Most food in this zone comes from dead organisms sinking to the bottom of the lake or ocean from overlying waters. The depth of the aphotic zone can be greatly affected by such things as turbidity and the season of the year.
The benthic zones are aphotic and correspond to the three deepest zones of the deep-sea. The bathyal zone covers the continental slope down to about . The abyssal zone covers the abyssal plains between 4,000 and 6,000 m. Lastly, the hadal zone corresponds to the hadalpelagic zone, which is found in oceanic trenches.
Rock cut inside Borra Caves Formations of rocks inside Borra Caves The caves are deep and totally aphotic. There is an area in the caves with limited light penetration. The stalactites seen in the caves are about in length while the stalagmites are long and columns are in height and in width. The height of the cave is and the length is about .
Spelling plagues columnist, Spokesman-ReviewMunroe, Mary (22 June 1976). Report from Washington, Virgin Islands Daily News (Washington News Bureau) The correct words spelled by Kneale also included: fatigue, conceit, opalescent, carafe, egalitarian, supernumerary, persiflage, literati, aphotic, bellipotent, physiolatry, demulcent, hagiology, and sauerbraten. A record 87 contestants participated this year, up from 79 in 1975 and 80 in 1974.(9 June 1976).
This is known as Beer's law. Once light has penetrated the surface, it may also be scattered by particles suspended in the water column. This scattering decreases the total amount of light as depth increases. Lakes are divided into photic and aphotic regions, the prior receiving sunlight and latter being below the depths of light penetration, making it void of photosynthetic capacity.
A white flatfish, a shrimp and a jellyfish were seen by the American crew of the bathyscaphe Trieste when it dove to the bottom in 1960.Seven Miles Down: The Story of The Bathyscaph Trieste. , Rolex Deep Sea Special, January 2006. In general, the deep sea is considered to start at the aphotic zone, the point where sunlight loses its power of transference through the water.
Narwhals, being black, hunt in large pods in the aphotic zone, but their underbelly still remains white to remain camouflaged when something is looking directly up or down at them. They have no dorsal fin to prevent collision with pack ice. Physeterids and Kogiids consist of sperm whales. Sperm whales consist the largest and smallest odontocetes, and spend a large portion of their life hunting squid.
Shortly after the return of their UK tour at the end of 2011, October Sky recorded 7 songs with producer Luc Tellier. On April 2, 2012. October Sky announced the release of the forthcoming album called The Aphotic Season which has been available June 18, 2012 worldwide. Later that year, the band released the second single of that album called Green And Beautiful on October 30th, 2012.
The transformation rate depends on the concentrations of all relevant reactive species, together with their corresponding second-order rate constants for a given pesticide. These constants are known for hydroxyl radical and molecular oxygen. In the absence of such rate constants, quantitative structure–activity relationships(QSARs) may allow their estimation for a specific pesticide from its chemical structure. The relevance of "dark" (aphotic) abiotic transformations varies by pesticide.
Deepsea lizardfish are typical inhabitants of the deep ocean floor. They are found circumglobally, in tropical and temperate latitudes (65° N to 40° S) at depths of 600–3,500 m in the aphotic zone, where water temperatures range between 4 and 3 °C. The energy-poor ecosystem dictates low population densities. Along the Mid- Atlantic Bight, a density of 0-8 fish per 25 x 103 m2 has been reported.
The oxygen minimum layer exists somewhere between a depth of 700m and 1000m deep depending on the place in the ocean. This area is also where nutrients are most abundant. The bathypelagic and abyssopelagic zones are aphotic, meaning that no light penetrates this area of the ocean. These zones make up about 75% of the inhabitable ocean space. The epipelagic zone (0–200m) is the area where light penetrates the water and photosynthesis occurs.
Consequently, the significance of new production lies in its connection to sinking material. At equilibrium, the export flux of organic material sinking into the aphotic zone is balanced by the upward flux of nitrate. By measuring how much nitrate is consumed by primary production, relative to that of regenerated ammonium, one should be able to estimate the export flux indirectly. As an aside, the f-ratio can also reveal important aspects of local ecosystem function.
Is nitrification really confined to the aphotic zone? A fundamental assumption in this interpretation of the f-ratio is the spatial separation of primary production and nitrification. Indeed, in their original paper, Eppley & Peterson noted that: "To relate new production to export requires that nitrification in the euphotic zone be negligible". However, subsequent observational work on the distribution of nitrification has found that nitrification can occur at shallower depths, and even within the photic zone.
Cyclothone are found mostly in the open ocean at tropical to temperate latitudes. Within the water column, they reside in the mesopelagic zone (also sometimes called the Ocean Twilight Zone). Cyclothone fishes are found in the aphotic zone and have limited access to light (and light dependent food sources). Some species of this genus, such as Cyclothone signata, are believed to migrate towards the surface, although they do not appear to do so in a diel vertical migration pattern.
The saccopharyngiformes are a derived lineage of unusual eels within the order Anguilliformes, and includes families Cyematidae, Monognathidae, Eurypharyngidae, Saccopharyngidae, and the proposed family Neocyematidae. Most of the fish in this group are deep-dwelling and rarely seen, typically known from only a handful of specimens. Species include recognizable fish such as pelican eels, bobtail eels, and gulper eels. Some can live deep in the ocean, well into the aphotic zone, from approximately 500-1800 meters deep.
Another adaptive use of fluorescence is to generate orange and red light from the ambient blue light of the photic zone to aid vision. Red light can only be seen across short distances due to attenuation of red light wavelengths by water. Many fish species that fluoresce are small, group- living, or benthic/aphotic, and have conspicuous patterning. This patterning is caused by fluorescent tissue and is visible to other members of the species, however the patterning is invisible at other visual spectra.
However, due to its capacity for photosynthesis, the photic zone has the greatest biodiversity and biomass of all oceanic zones. Nearly all primary production in the ocean occurs here. Any life forms present in the aphotic zone must either be capable of movement upwards through the water column into the photic zone for feeding, or must rely on material sinking from above, or must find another source of energy and nutrition, such as occurs in chemosynthetic archaea found near hydrothermal vents and cold seeps.
Siphonophorae is an order of marine animals from the phylum Hydrozoa that consist of a specialized medusoid and polyp zooid. Some siphonophores, including the genus Erenna that live in the aphotic zone between depths of 1600 m and 2300 m, exhibit yellow to red fluorescence in the photophores of their tentacle-like tentilla. This fluorescence occurs as a by-product of bioluminescence from these same photophores. The siphonophores exhibit the fluorescence in a flicking pattern that is used as a lure to attract prey.
The vampire squid is an extreme example of a deep sea cephalopod, thought to reside at aphotic (lightless) depths from or more. Within this region of the world's oceans is a discrete habitat known as the oxygen minimum zone. Within the zone, the saturation of oxygen is too low to support aerobic metabolism in most complex organisms. Nonetheless, the vampire squid is able to live and breathe normally in the minimum zone at oxygen saturations as low as 3%, an ability that few other animals possess.
October Sky is a Canadian rock band from Montreal, Canada. Formed in 2000, the group currently consists of lead vocalist and guitarist Karl Raymond and drummer Alex Racine. The style of their early music, including their debut album Hell Isn't My Home, has been described as progressive, but they started to add several electronic elements to their sound on subsequent albums. The Aphotic Season was the first step in that new direction but their latest EP Rise marked a major shift in their sound.
In such areas the euphotic zone may be only a few tens of meters deep or less. The dysphotic zone, where light intensity is considerably less than 1% of surface irradiance, extends from the base of the euphotic zone to about 1000 meters. Extending from the bottom of the photic zone down to the seabed is the aphotic zone, a region of perpetual darkness. Since the average depth of the ocean is about 4300 meters, the photic zone represents only a tiny fraction of the ocean’s total volume.
Because the water filters out the wavelengths and intensity of water reaching certain depths, different proteins, because of the wavelengths and intensities of light they are capable of absorbing, are better suited to different depths. Theoretically, some fish eyes can detect light as deep as 1000 m. At these depths of the aphotic zone, the only sources of light are organisms themselves, giving off light through chemical reactions in a process called bioluminescence. Fluorescence is simply defined as the absorption of electromagnetic radiation at one wavelength and its reemission at another, lower energy wavelength.
Living almost exclusively in the aphotic zone where little to no sunlight penetrates, the Portuguese dogfish is relatively common and the dominant shark species in deeper waters. The large, squalene-rich liver of this shark allows it to maintain neutral buoyancy and hover with minimal effort; males contain more squalene in their livers than females. A tracking study in the Porcupine Seabight has found that the Portuguese dogfish has an average swimming speed of , and does not remain in any particular area for long. This species may be preyed upon by larger fishes and sharks.
Light zonation is the concept of how the amount of sunlight penetration into water influences the structure of a body of water. These zones define various levels of productivity within an aquatic ecosystems such as a lake. For instance, the depth of the water column which sunlight is able to penetrate and where most plant life is able to grow is known as the photic or euphotic zone. The rest of the water column which is deeper and does not receive sufficient amounts of sunlight for plant growth is known as the aphotic zone.
Automicrite deposits are found in different environments, as lakes, tidal flats, or the aphotic zone of marine slopes and basins. However, the environment where automicrite is most common is in carbonate mud mounds, a type of carbonate platform. In this kind of carbonate platform, common in the geological past but nearly absent today, automicrite deposits made carbonate structures of many tens to hundreds of metres of relief called "mud mounds". Automicritic mud mounds seemed to form more easily in areas of low sedimentation rate of siliciclastic extrabasinal sediment.
These factories are characterised by abiotic precipitation and biotically induced precipitation. The typical environmental settings where "mud-mound factories" are found in the Phanerozoic are dysphotic or aphotic, nutrient-rich waters that are low in oxygen but not anoxic. These conditions often prevail in the thermocline, for example at intermediate water depths below the ocean's mixed layer. The most important component of these platforms is fine-grained carbonate that precipitates in situ (automicrite) by a complex interplay of biotic and abiotic reactions with microbes and decaying organic tissue.
Fish such as the fairy wrasse that have developed visual sensitivity to longer wavelengths are able to display red fluorescent signals that give a high contrast to the blue environment and are conspicuous to conspecifics in short ranges, yet are relatively invisible to other common fish that have reduced sensitivities to long wavelengths. Thus, fluorescence can be used as adaptive signaling and intra-species communication in reef fish. Additionally, it is suggested that fluorescent tissues that surround an organism's eyes are used to convert blue light from the photic zone or green bioluminescence in the aphotic zone into red light to aid vision.
Fig. 2. Example of the level of chlorophyll fluorescence at different water depths. Light attenuation factors have been shown to be quite predictive of the DCM depth, since the phytoplankton present in the region require sufficient sunlight for growth, resulting in a DCM that is generally found in the euphotic zone. However, if the phytoplankton population has adapted to lower light environments, the DCM can also be located in the aphotic zone. The high chlorophyll concentration at the DCM is due to the high number of phytoplankton that have adapted to functioning in low light conditions.
Some systems use other names. The off shore areas may be called the pelagic zone, the photic zone may be called the limnetic zone and the aphotic zone may be called the profundal zone. Inland from the littoral zone one can also frequently identify a riparian zone which has plants still affected by the presence of the lake—this can include effects from windfalls, spring flooding, and winter ice damage. The production of the lake as a whole is the result of production from plants growing in the littoral zone, combined with production from plankton growing in the open water.
The demersal zone is the part of the sea or ocean (or deep lake) consisting of the part of the water column near to (and significantly affected by) the seabed and the benthos. The demersal zone is just above the benthic zone and forms a layer of the larger profundal zone. Being just above the ocean floor, the demersal zone is variable in depth and can be part of the photic zone where light can penetrate and photosynthetic organisms grow, or the aphotic zone, which begins between depths of roughly and extends to the ocean depths, where no light penetrates.
Regions below the epipelagic are divided into further zones, beginning with the mesopelagic which spans from 200 to 1000 meters below sea level, where so little light penetrates that primary production becomes impossible. Below this zone the deep sea begins, consisting of the aphotic bathypelagic, abyssopelagic and hadopelagic. Food consists of falling organic matter known as 'marine snow' and carcasses derived from the productive zone above, and is scarce both in terms of spatial and temporal distribution. Instead of relying on gas for their buoyancy, many deep-sea species have jelly-like flesh consisting mostly of glycosaminoglycans, which provides them with very low density.
The mesopelagic zone (Greek μέσον, middle), also known as the middle pelagic or twilight zone, is the part of the pelagic zone that lies between the photic epipelagic and the aphotic bathypelagic zones. It is defined by light, and begins at the depth where only 1% of incident light reaches and ends where there is no light; the depths of this zone are between approximately 200 to 1000 meters (~660 to 3300 feet) below the ocean surface. It hosts a diverse biological community that includes bristlemouths, blobfish, bioluminescent jellyfish, giant squid, and a myriad of other unique organisms adapted to live in a low-light environment. It has long captivated the imagination of scientists, artists and writers; deep sea creatures are prominent in popular culture, particularly as horror movie villains.
As fish stocks dwindle in the upper ocean, deep-sea fisheries are increasingly being targeted for exploitation. Because deep sea fish are long-lived and slow growing, these deep-sea fisheries are not thought to be sustainable in the long term given current management practices. Changes in primary production in the photic zone are expected to alter the standing stocks in the food-limited aphotic zone. Hydrocarbon exploration in deep water occasionally results in significant environmental degradation resulting mainly from accumulation of contaminated drill cuttings, but also from oil spills. While the oil gusher involved in the Deepwater Horizon oil spill in the Gulf of Mexico originates from a wellhead only 1500 meters below the ocean surface, it nevertheless illustrates the kind of environmental disaster that can result from mishaps related to offshore drilling for oil and gas.

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