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Range of light usable for photosynthesis
Photosynthetically active radiation (PAR) designates the spectral range (wave band) of solar radiation from 400 to 700 nanometers that photosynthetic
Photosynthetically active radiation
Photosynthetically_active_radiation
incoming solar radiation in the photosynthetically active radiation spectral region that is absorbed by a photosynthetic organism, typically describing
Fraction of absorbed photosynthetically active radiation
Fraction_of_absorbed_photosynthetically_active_radiation
Scientific study of light's effect on living organisms
photosynthetic cells, there is a limited range of wavelengths that plants can use to perform photosynthesis. This range is called "Photosynthetically
Photobiology
Ecological metric
that is absorbed, and on what kind of light is used (see Photosynthetically active radiation). It takes eight (or perhaps ten or more) photons to use
Photosynthetic_efficiency
Lighting to aid plant growth
generation of light sources. LED lights produce the highest photosynthetically active radiation (PAR) of any light. LED grow lights are usually composed
Grow_light
Chinese American atmospheric and environmental scientist
techniques for measuring canopy absorbed photosynthetically active radiation (APAR) and surface UV-B radiation. In response to the challenges in determining
Zhanqing_Li
Species of sea anemone
Individuals that live in microhabitats that are deficient in photosynthetically active radiation (PAR), such as under docks or in caves, lack symbionts and
Aggregating_anemone
Biological process to convert light into chemical energy
2O, leaf temperature, barometric pressure, leaf area, and photosynthetically active radiation (PAR), it becomes possible to estimate, "A" or carbon assimilation
Photosynthesis
Obsolete unit with conflicting definitions
rather than the energy in one mole of photons. As such, photosynthetically active radiation (PAR) was formerly often reported in microeinsteins per second
Einstein_(unit)
Region of change in vegetation reflectance
photosynthesis. For a more detailed explanation and a graph of the photosynthetically active radiation (PAR) spectral region, see Normalized difference vegetation
Red_edge
Part of a sea, lake, or river that is close to the shore
lakes, the littoral zone is the nearshore habitat where photosynthetically active radiation penetrates to the lake bottom in sufficient quantities to
Littoral_zone
Metric quantifying vegetation density
discussed below. Live green plants absorb solar radiation in the photosynthetically active radiation (PAR) spectral region, which they use as a source
Normalized difference vegetation index
Normalized_difference_vegetation_index
green cover, chlorophyll content, green biomass and absorbed photosynthetically active radiation (APAR). VIs have been historically classified based on a
Vegetation_index
Topics referred to by the same term
a signal fly in the family Platystomatidae Photosynthetically active radiation, a range of solar radiation Post-anesthesia recovery, part of a hospital
Par
Plant sensing and development response
in all plants: they are sessile by nature and access to photosynthetically active radiation is essential for plant nutrition and growth. In addition
Shade_avoidance
Topics referred to by the same term
coefficient (the rate of attenuation of irradiance) for photosynthetically active radiation This disambiguation page lists articles associated with the
KPAR
Known extent to which a planet is suitable for life
Further research—including a consideration of the amount of photosynthetically active radiation—suggested that tidally locked planets in red dwarf systems
Planetary_habitability
Phenomenon where corals expel algae tissue
or reduced water temperatures increased solar irradiance (photosynthetically active radiation and ultraviolet light) increased sedimentation (due to silt
Coral_bleaching
Brief increase in solar irradiance
depends on its duration, size, shape and the intensity of photosynthetically active radiation (PAR), which in turn is set by canopy structure and solar
Sunfleck
Synthesis of organic compounds from carbon dioxide by biological organisms
(the latter covaries to an extent with light, specifically photosynthetically active radiation (PAR), the source of energy for photosynthesis). While plants
Primary_production
Small-scale cultivation of plants
horticulture Introduced species Invasive species Permaculture Photosynthetically active radiation Plant nutrition Plug (horticulture) Tropical horticulture
Horticulture
Alteration of the DNA of a somatic cell that is inherited by its daughter cells
homologous recombination in Arabidopsis is dependent on photosynthetically active radiation". Proc Natl Acad Sci U S A. 97 (24): 13425–9. Bibcode:2000PNAS
Somatic_recombination
Ecosystem in saltwater environment
composition, zooplankton biomass, water-column structure, photosynthetically active radiation, transparency, chlorophyll-a, nitrate, and primary production
Marine_ecosystem
Instruments measuring photosynthetic rates
Modern photosynthetic systems may also be designed to measure leaf temperature, chamber air temperature, PAR (photosynthetically active radiation), and
Photosynthesis_system
Marine aquarium that displays live corals and other marine animals
temperature (measured in kelvins), color rendering index (CRI), photosynthetically active radiation (PAR) and lumens. Power output available to the hobbyist
Reef_aquarium
Graph of the rate of biological effectiveness plotted against wavelength of light
visible and near-visible light. Erythemal action spectrum Photosynthetically active radiation Photosynthesis Absorption spectrum Chlorophyll a Gorton HL
Action_spectrum
Agricultural practice of grazing animals in woodland
silvopastures provide shade, which reduces the intensity of photosynthetically active radiation (PAR) compared to open pastures, while still allowing more
Silvopasture
diffuse radiation in the open, without canopy or other sky obstruction. Usually calculations are performed for either photosynthetically active radiation (400-700
Hemispherical_photography
American scientist
published studies on the accurate measurement of photosynthetically active radiation, solar and net radiation, air temperature, and canopy light interception
Bruce_Bugbee
include the circumsolar irradiance, illuminance components, photosynthetically active radiation (PAR) components, and irradiance calculations in the UV,
Simple Model of the Atmospheric Radiative Transfer of Sunshine
Simple_Model_of_the_Atmospheric_Radiative_Transfer_of_Sunshine
Range of light at the extreme red end of the visible spectrum
professor Keith J. McCree lobbied for a standard definition of photosynthetically active radiation (PAR: λ=400–700 nm) which did not include FR. More recently
Far-red_light
Unusually warm temperature event in the ocean
discovered that higher temperatures and elevated levels of photosynthetically active radiation (PAR) had a detrimental impact on its reproductive physiology
Marine_heatwave
How deeply visible light penetrates through water
all visible light. The light attenuation coefficient of photosynthetically active radiation (PAR) refers to the decrease in all visible light (400–700 nm)
Water_clarity
Preparation of soil by mechanical agitation
Draper et al.'s (1985) mounds received 5 times the amount of photosynthetically active radiation (PAR) summed over all sampled microsites throughout the first
Tillage
Genus of green algae
nutrient supply and recycling, gas transfer and exchange, PAR (Photosynthetically Active Radiation) delivery, cultural integrity, environmental control, land
Scenedesmus
Use of plastic materials in agriculture
stabilization to cool soil and prevent insects, elimination of photosynthetically active radiation to prevent weed growth, IR opacity, antidrip/antifog, and
Plasticulture
Species of coral
growth and survival. Results from a study of the effects of Photosynthetically Active Radiation (PAR) treatments on S. glaucum stated that the soft coral
Sarcophyton_glaucum
increased amounts of photosynthetically active radiation to penetrate the coral skeleton. Greater amounts of photosynthetically active radiation in coral skeletons
Resilience_of_coral_reefs
Species of lichen-forming fungus
synthesis—under controlled conditions, thalli exposed only to photosynthetically active radiation (PAR) regenerated 12% of their parietin, while those exposed
Xanthoria_parietina
Form and structure of a phylum
light). The photosynthetically usable light range of the solar spectrum is generally referred to as PAR (photosynthetically active radiation), but some
Cyanobacterial_morphology
Instrument for measuring solar irradiance
spectrum, or of certain portions such as UV, IR or PAR (photosynthetically active radiation), needs to be calculated. This is done by using diodes with
Pyranometer
Marine flowering plants
a reduced cuticle, an epidermis which lacks stomata and is the main photosynthetic tissue. The rhizome or underground stem is important in anchoring. The
Seagrass
Method to derive a plant or embryo from a single somatic cell
photosynthesis (Pn) response to vapour pressure deficit (VPD) and photosynthetically active radiation (PAR) showed that emblings had 15% greater Pn at VPD of less
Somatic_embryogenesis
Species of lichen
helps screen harmful ultraviolet (UV) radiation while also reducing transmittance of photosynthetically active radiation to underlying cells. The concentration
Nephroma_arcticum
Ground features formed by uprooted trees
mound.[citation needed] Mounds receive the highest amount of photosynthetically active radiation (PAR) and pits the lowest amount. Pits also have much higher
Pit-and-mound_topography
Application of biomedical engineering to measurement of biological systems
CO2 exchange of the leaves, CO2 concentration in the air, photosynthetically active radiation, Air vapor deficit, etc. The package for the device includes
Bioinstrumentation
Opto-isolator Outgoing longwave radiation PASS device Photometer Photon upconversion Photosynthetically active radiation Photothermal therapy Planetary
Index_of_infrared_articles
Possible factors for life around red dwarf stars
further research, including a consideration of the amount of photosynthetically active radiation, has suggested that tidally locked planets in red dwarf systems
Habitability of red dwarf systems
Habitability_of_red_dwarf_systems
Ecological concept
pressure deficit, soil moisture, light intensity and levels of photosynthetically active radiation (PAR) all change at edges. One study estimated that the amount
Edge_effects
Species of alga
concentrations are much lower at this stage as the cells need photosynthetically active radiation for energy and growth. Cells in the green stage also have
Chlamydomonas_nivalis
Study of light interaction with water and submerged materials
the total visible light available for plants in terms of photosynthetically active radiation (PAR) – called “Kd(PAR).” In other cases, Kd can describe
Ocean_optics
Species of succulent plant found in Mexico
come with a tradeoff, as the wax limits the absorptance of photosynthetically active radiation, which puts it at a disadvantage with competing species.
Dudleya_brittonii
JAXA project of long-term observation of Earth
optical instrument, it will collect data related to the carbon cycle and radiation budget, such as measurements of clouds, aerosols, ocean color, vegetation
Global Change Observation Mission
Global_Change_Observation_Mission
Species of eucalyptus
Further research has explored reflectance of ultraviolet and photosynthetically active radiation. The species was first formally described by the nineteenth
Eucalyptus_urnigera
Practice of controlling forests for timber production
et al.'s (1985) mounds received five times the amount of photosynthetically active radiation (PAR) summed over all sampled microsites throughout the first
Silviculture
Overview article
homologous recombination in Arabidopsis is dependent on photosynthetically active radiation". Proceedings of the National Academy of Sciences. 97 (24):
Transgenerational epigenetic inheritance in plants
Transgenerational_epigenetic_inheritance_in_plants
Quotient of leaf area to leaf dry mass
drought stress. Hemispherical photography Leaf Area Index Photosynthetically active radiation Plant growth analysis Vile, D.; Garnier, E; Shipley, B; Laurent
Specific_leaf_area
Physical process by which matter takes up a photon's energy and stores it
In physics, absorption of electromagnetic radiation is how matter (typically electrons bound in atoms) takes up a photon's energy—and so transforms electromagnetic
Absorption (electromagnetic radiation)
Absorption_(electromagnetic_radiation)
American geographer
"PARduino: a simple and inexpensive device for logging photosynthetically active radiation". Tree Physiology. 34 (6): 640–645. doi:10.1093/treephys/tpu044
Holly_Barnard
Chemical process produced by soil and the organisms within it
to also measure soil temperature, soil moisture and PAR (photosynthetically active radiation). These variables are normally recorded in the measuring
Soil_respiration
high turbidity of the estuary, which limits the ability of photosynthetically active radiation (PAR) to penetrate beyond the top few centimeters of the
Ecology of the San Francisco Estuary
Ecology_of_the_San_Francisco_Estuary
designing horticultural lighting systems to provide sufficient photosynthetically active radiation (PAR). Building information modeling (BIM) involves the generation
List of file formats for luminaire radiometric data
List_of_file_formats_for_luminaire_radiometric_data
Daily total of photosynthetic light per area
Daily light integral (DLI) describes the number of photosynthetically active photons (individual particles of light in the 400-700 nm range) that are
Daily_light_integral
Genus of lichen-forming fungi
demonstrated in C. islandica, where melanins absorb both UV-B and photosynthetically active radiation. The synthesis of these compounds appears to be influenced
Cetraria
Balance between production and consumption of organic matter in lakes
scale, GPP rates are most affected by the diel cycle of photosynthetically active radiation while ER is largely affected by changes in water temperature
Lake_metabolism
Species of lichen
occur in Antarctica. This lichen experiences high fluxes of photosynthetically active radiation, desiccation, and cold temperatures. The Net Assimilation
Buellia_frigida
Species of moss
distinct zones. The lower portion contains chloroplasts and is photosynthetically active, while the upper (distal) portion is entirely chloroplast-free
Bryum_argenteum
German research vessel
filtration, bongo nets and a multinet, and a sediment trap. Photosynthetic active radiation (PAR) is also measured on the mast top and on top of the CTD
Eugen_Seibold
Genus of algae
All Syracosphaera species occupy the photic zone where photosynthetically active radiation is sufficient to sustain photosynthesis, however heterococcolith
Syracosphaera
Species of tree
physiological (closing stomata) means. Leaves absorb light in the photosynthetically active radiation (PAR) spectrum at wavelengths between 400 nm and 700 nm with
Simarouba_amara
Australian icebreaking research vessel
sensor Ice and wave radar Long wave infrared radiation sensors (port and starboard) Photosynthetic active radiation (PAR) sensors (port and starboard) Relative
RSV_Nuyina
American marine biologist (1962–2018)
and irradiance. Alongside seawater temperature, they measure photosynthetic active radiation, salinity and nutrient composition. This allowed them to build
Ruth_Gates
Unicellular algae responsible for the formation of chalk
includes sunshade protection from ultraviolet (UV) light and photosynthetic active radiation (PAR) (1) and energy dissipation under high-light conditions
Coccolithophore
cannot process them swiftly enough. Light – Light, also called photosynthetic Active Radiation (PAR) is the energy source for green plant growth. PAR powers
Theoretical production ecology
Theoretical_production_ecology
Ethernet; RS232 x x x N/A N/A N/A N/A N/A N/A Photosynthetically Active Radiation; Total Solar Radiation 65.53 32.18 6.50 2xAA (2.1-3.6 V) 5.1-21 μA 1
List_of_wireless_sensor_nodes
Satellite-borne sensor designed to collect global ocean biological data
concentration, colored dissolved organic matter (CDOM) index, photosynthetically active radiation (PAR), and normalized fluorescence line height (NFLH). In
SeaWiFS
Solar thermal collector systems
the solar spectrum. Water allows so-called "PAR" light (Photosynthetically active radiation, the light that plants use to grow) to pass, while "NIR"
Optical overheating protection
Optical_overheating_protection
Protective shell of a type of eukaryotic organism
including sunshade protection from ultraviolet light (UV) and photosynthetic active radiation (PAR) and energy dissipation under high-light conditions. (C)
Protist_shell
Professor at the University of Alberta
connection with Primary Productivity (PP), Leaf Area Index (LAI), Photosynthetic Active Radiation (PAR) and biodiversity, particularly in tropical secondary
Arturo_Sanchez-Azofeifa
Period of major evolutionary diversification of animal life
The Cambrian explosion (also known as the Cambrian radiation or Cambrian diversification) is an interval of time beginning approximately 538.8 million
Cambrian_explosion
Chemical element with atomic number 8 (O)
lower stratosphere, which shields the biosphere from ionizing ultraviolet radiation. However, ozone present at the surface is a corrosive byproduct of smog
Oxygen
Protists that live in saltwater or brackish water
including sunshade protection from ultraviolet light (UV) and photosynthetic active radiation (PAR) and energy dissipation under high-light conditions. (C)
Marine_protists
Edible seaweed
Oxidation as a Potential Protective Function Against High Photosynthetically Active and UV Radiation in Gametophytes of Alaria esculenta (Alariales, Phaeophyceae)
Alaria_esculenta
Biochemical process
day and night and photosynthetic efficiency is very low. Some biennial and annual species, e.g., winter cereals and winter-active herbaceous weeds, keep
Photoprotection
Physical phenomenon
The second mechanism shows up in photosynthetically active sub-cell complexes in suspension (e.g. photosynthetic reaction centers). There, the electric
Photoacoustic_effect
Emission of light by a substance that has absorbed light
substance that has absorbed light or other electromagnetic radiation. When exposed to ultraviolet radiation, many substances will glow (fluoresce) with colored
Fluorescence
Assessments of possible life on Mars
Crater on Mars. Currently, the surface of Mars is bathed with ionizing radiation, and Martian soil is rich in perchlorates toxic to microorganisms. Therefore
Life_on_Mars
Phylum of photosynthesising prokaryotes
discovery and study of non-photosynthetic lineages related to typical photosynthetic cyanobacteria (Cyanophyceae) is still very active. The treatment of these
Cyanobacteria
anoxygenic photosynthetic organisms at the photic zone could have led to the ability to strip electrons from H2S more efficiently under ultraviolet radiation. There
Evolution_of_photosynthesis
Grapevine structure above ground
color. Prior to the winter dormancy, the vine will stop being photosynthetically active which will contribute to a natural break down of chlorophyll and
Canopy_(grape)
Data acquisition method for earth sciences
electromagnetic radiation by sensors. The radiation can be naturally sourced (passive remote sensing), or produced by machines (active remote sensing)
Remote_sensing_in_geology
Chemical reaction
splitting is the basis of the hydrogen fuel cell. Water splitting using solar radiation has not been commercialized. Electrolysis of water is the decomposition
Water_splitting
Earth history, 1.8 to 0.8 billion years ago
advances may have been important precursors to the large-scale evolutionary radiation of macroscopic complex life later in the Ediacaran Avalon Explosion and
Boring_Billion
Scientific projections regarding the far future
creatures would become active during the polar night and aestivate during the polar day due to the intense heat and radiation. Much of the land would
Timeline_of_the_far_future
Eukaryotes other than animals, plants or fungi
depths of shallow water environments. Mirroring the animal radiation, there was a radiation of phytoplanktonic protists (acritarchs) around 520–510 Ma
Protist
Diverse group of photosynthetic organisms
AL-ghee; sing.: alga /ˈælɡə/ ) are any of a large and diverse group of photosynthetic organisms. It excludes the land plants (embryophytes). Such organisms
Algae
Type of autonomous underwater vehicle
designed specifically for gliders. These include: Fluorometers Photosynthetically Available Radiation (PAR) sensors Dissolved Oxygen optodes Acoustic Doppler
Underwater_glider
Life arising from non-living matter
especially for simple early lifeforms with little ability to repair radiation damage. Radiation levels from a young Sun were likely greater, and, with no ozone
Abiogenesis
Atmospheric phenomenon
intercept light with a larger leaf area than having photosynthetic systems compromised. Damage from UVB radiation is more likely to be significant on species
Ozone_depletion
Communities of living organisms on the soil surface in arid and semi-arid ecosystems
precipitation transforming from a dry, dead-looking crust to an actively photosynthetic community. It will change its appearance to be vibrant and alive
Biological_soil_crust
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