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Diel vertical migration refers to a pattern of movement that some organisms living in the ocean's photic zone undertake each day. The organisms that exhibit this pattern of behaviour range in size from microscopic plankton through to much larger nekton such as fish. Organisms generally undergo diel vertical migration in response to ecological gradients (resources, prey, predators) in the pelagic zone. A crab is an example of an organism. ...
The worlds oceans as seen from the South Pacific Ocean Oceans (from Okeanos in Greek, the ancient Greeks noticing the strong current that flowed off Gibraltar and assuming it was a great river) cover almost three quarters (71%) of the surface of the Earth, and nearly half of the...
The photic zone is the depth of the water, whether in a lake or an ocean, that is exposed to sufficient sunlight for photosynthesis to occur. ...
Behavior or behaviour refers to the actions or reactions of an object or organism, usually in relation to the environment. ...
This article or section does not cite its references or sources. ...
Nekton is the grouping of living organisms that live in the water column of the ocean and freshwater lakes. ...
The Guppy (Poecilia reticulata) is one of the most popular freshwater aquarium fish species in the world. ...
Ernst Haeckel coined the term oekologie in 1866. ...
Horizontal line (use sparingly)d grade for the grade or gradient of roads and other geographic features. ...
Diagram of the layers of the pelagic zone. ...
In the case of autotrophic phytoplankton, while light for photosynthesis declines exponentially from the ocean's surface, the availability of nutrients typically rises down the water column (because of transport by the biological pump). Consequently, some phytoplankton migrate down the water column at night to obtain nutrients, but return to the surface during daylight. Green (from chlorophyll) fronds of a maidenhair fern: a photoautotroph Flowchart to determine if a species is autotroph, heterotroph, or a subtype An autotroph (from the Greek autos = self and trophe = nutrition) is an organism that produces organic compounds from carbon dioxide as a carbon source, using either light or...
Diagrams of some typical phytoplankton Phytoplankton are the autotrophic component of the plankton that drift in the water column. ...
Prism splitting light Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific context, electromagnetic radiation of any wavelength [citation needed]. The elementary particle that defines light is the photon. ...
The leaf is the primary site of photosynthesis in plants. ...
It has been suggested that half-life be merged into this article or section. ...
A nutrient is either element or compound necessary for or contributing to an organisms metabolism, growth, or other functioning. ...
In oceanic biogeochemistry, the biological pump is the sum of a suite of biologically-mediated processes that transport carbon from the surface euphotic zone to the oceans interior. ...
Melbourne skyline at night Night or night-time is the period in which the sun is below the horizon. ...
Look up daylight in Wiktionary, the free dictionary. ...
By contrast, heterotrophic zooplankton and larger animals do not usually require light for growth (though some mixotrophs possess endosymbionts that do require light). However, in well-lit surface waters (or even the "twilight" conditions of the mesopelagic zone) where their prey are most abundant, they may be vulnerable to larger predators that hunt by sight. As a result, some undertake the opposite pattern of diel vertical migration, travelling to the surface during night to feed, then descending to darker, safer depths during the day. A heterotroph (Greek heteron = (an)other and trophe = nutrition) is an organism that requires organic substrates to get its carbon for growth and development. ...
Photomontage of plankton organisms Plankton is the aggregate community of weakly swimming but mostly drifting small organisms that inhabit the water column of the ocean, seas, and bodies of freshwater. ...
Phyla Subregnum Parazoa Porifera (sponges) Subregnum Agnotozoa Placozoa (trichoplax) Orthonectida (orthonectids) Rhombozoa (dicyemids) Subregnum Eumetazoa Radiata (unranked) (radial symmetry) Ctenophora (comb jellies) Cnidaria (coral, jellyfish, anemones) Bilateria (unranked) (bilateral symmetry) Acoelomorpha (basal) Myxozoa (slime animals) Superphylum Deuterostomia (blastopore becomes anus) Chordata (vertebrates, etc. ...
An endosymbiont is any organism that lives within the body or cells of another organism, i. ...
Diagram of the layers of the pelagic zone. ...
This snapping turtle is trying to make a meal of a Canada goose, but the goose is too wary. ...
The visual system is the part of the nervous system which allows organisms to see. ...
Aside from avoidance of predators, deeper waters are also cooler. During periods when food is relatively scarce (i.e. away from spring blooms), visits to these lower temperature waters slows the metabolism of organisms, allowing them to subsist on a lower dietry intake for longer. The (typically) sudden and strong bloom of phytoplankton in the spring in temperate and sub-polar oceans. ...
Metabolism (from Greek μεταβολισμός metabolismos) is the biochemical modification of chemical compounds in living organisms and cells. ...
It has been suggested that this article or section be merged into Nutrition. ...
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