Parameter: Fv_Fm

Short Description: Fv to Fm ratio
Short Name: Fv_Fm
Official Name: Fv_Fm
Units: dimensionless
No Data Value: nd

Description

The difference between maximum fluorescence and minimum fluorescence is Fv, or variable fluorescence. Fv/Fm is a normalized ratio created by dividing variable fluorescence by maximum fluorescence.


DatasetPI-Supplied DescriptionPI-Supplied Name
Temperature and pCO2 effects on survivability of 25 genotypes of Acropora cervicornis coral at Mote Marine Laboratory in Nov-Dec 2019Difference in maximum quantum yield (Fv/Fm) between pre and post exposure Change_in_Fv_Fm
Temperature and pCO2 effects on survivability of 25 genotypes of Acropora cervicornis coral at Mote Marine Laboratory in Nov-Dec 2019Maximum quantum yield (Fv/Fm) after exposure to treatments Post_Exposure_Fv_Fm
Temperature and pCO2 effects on survivability of 25 genotypes of Acropora cervicornis coral at Mote Marine Laboratory in Nov-Dec 2019Maximum quantum yield (Fv/Fm) prior to exposure to treatments Pre_Exposure_Fv_Fm
Coral pulse amplitude modulation (PAM) throughout a heat temperature study conducted in aquaria at Brewer’s Bay, St. Thomas, The U.S. Virgin Islands in June of 2017Quantum yield (Fv/Fm) Yield
Cell abundance, forward scatter, chlorophyll, growth rate, and FvFm.0 measurements from reciprocal transplant assaysDay 0 Maximum quantum yield of photochemistry in PSII, measured in a dark-adapted state (dimensionless). This parameter characterizes the efficiency of primary photosynthetic reactions. FvFm_0
Data from custom instrument (CLASS) measured on R/V Endeavor cruise (EN614) in May 2018Variable Fluorescence Green Laser FvFm_G
Data from custom instrument (CLASS) measured on R/V Endeavor cruise (EN614) in May 2018Variable Fluorescence Green Laser corrected FvFm_Gc
Physiology measurements on collected coral pairs from Kaneohe Bay, Oahu, HI between July and December 2019Photochemical efficiency Yield
Hemiaulus-Richelia physiological response to different nitrogen sourcesFRR variable fluorescence (Fv/Fm) or PSII photosynthetic efficiency Fv_Fm
Diatom growth rates from samples collected on the Gould cruise LMG1411 in the Western Antarctica Peninsula from 2014 (Polar Transcriptomes project)Relative photosynthetic efficiency error propogation_error_FvFm
Diatom growth rates from samples collected on the Gould cruise LMG1411 in the Western Antarctica Peninsula from 2014 (Polar Transcriptomes project)Relative photosynthetic efficiency relative_FvFm
Diatom growth rates from samples collected on the Gould cruise LMG1411 in the Western Antarctica Peninsula from 2014 (Polar Transcriptomes project)Relative photosynthetic efficiency number of samples recorded sample_size_FvFm
Acropora cervicornis coral disease exposure experiment conducted on Summerland Key, FL from August to September of 2015 (Resilient Acerv project)Fv/Fm after inoculation: photochemical efficiency 3 days after inoculation occurred Fv2Fm_after_innoculation
Acropora cervicornis coral disease exposure experiment conducted on Summerland Key, FL from August to September of 2015 (Resilient Acerv project)Fv/Fm at inoculation: photochemical efficiency on the day of inoculation (prior to exposure) Fv2Fm_at_innoculation
Acropora cervicornis coral disease exposure experiment conducted on Summerland Key, FL from August to September of 2015 (Resilient Acerv project)Second Fv/Fm after inoculation: a repeat measurement of photochemical efficiency 3 days after inolculation occurred Second_Fv2Fm_data_after_innoculation
Maximum potential quantum efficiency of Photosystem II (Fv/Fm) for two coral species, Acropora hemprichii and Porites lobata, in response to thermal stressmeasurements of dark adapted maximum quantum yield of photosystem II of the algal symbionts (Fv/Fm) for each ramet (a unitless ratio) Fv_Fm
FvFm and fluorescence lifetime data collected from the R/V Melville MV1405 along the California Coastline during 2014maximum photosynthetic efficiency of photosystem II (quantum yield of photochemistry) corr_FvFm
Photophysiological responses of two dinoflagellate species used in natural high light exposure experiments (Protist Signaling project)Photosynthetic efficiency (variable fluorescence normalized to maximum fluorescence) FvFm
Photosynthetic efficiency data from light stress in phytoplankton and dinoflagellate grazing response experiments from July of 2015 to September of 2018Photosynthetic efficiency Fv/Fm (= variable fluorescence/maximum fluorescence) as measured using a Walz Water PAM fluorometer after 20 min dark acclimation at 15°C FvFm
Laboratory effective quantum yield data for Orbicella faveolata recruits inoculated with either Symbiodinium microadriaticum or S. minutum (McIlroy,J. Phycology, 2016) (SymBioSys project)Effective quantum yield (delta Fv/Fm’) Yield
Laboratory results for maximum quantum yield data for Orbicella faveolata recruits inoculated with either Symbiodinium microadriaticum or S. minutum (McIlroy,J. Phycology, 2016) (SymBioSys project)Maximum quantum yield (Fv/Fm: maximum quantum yield of PSII) of Orbicella faveolata recruits FvFm
Photosynthetic data collected from the R/V Oceanus OC1504A in the Oregon/California Coastal Upwelling Zone, between 34-44N and 120-124W in 2015.maximum quantum yield corrected for background fluorescence; Fv divided by Fm FvFm
Q incubation data from the R/V Melville (MV1405) cruise along the California coast during July 2014Maximum quantum yield FvFm
Niskin bottle sample data from R/V New Horizon NEMO cruise NH1417 in the Eastern Pacific between San Diego and Hawaii from August to September 2014 (Phyto response to N substrates project)Maximum Photochemical Efficiency (Fv/Fm) of Photosystem II (445-450nm) FRRF_FvFm_Color1
Niskin bottle sample data from R/V New Horizon NEMO cruise NH1417 in the Eastern Pacific between San Diego and Hawaii from August to September 2014 (Phyto response to N substrates project)Maximum Photochemical Efficiency (Fv/Fm) of Photosystem II (470nm) FRRF_FvFm_Color2
Niskin bottle sample data from R/V New Horizon NEMO cruise NH1417 in the Eastern Pacific between San Diego and Hawaii from August to September 2014 (Phyto response to N substrates project)Maximum Photochemical Efficiency (Fv/Fm) of Photosystem II (505nm) FRRF_FvFm_Color3
Niskin bottle sample data from R/V New Horizon NEMO cruise NH1417 in the Eastern Pacific between San Diego and Hawaii from August to September 2014 (Phyto response to N substrates project)Maximum Photochemical Efficiency (Fv/Fm) of Photosystem II (530nm) FRRF_FvFm_Color4
Response of Bathycoccus sp. to iron-limitation sampled aboard R/V Roger Revelle RR1813 in the Subarctic North Pacific near Station PAPA (50 N, 144.8 W) from August to September 2018Estimates of maximum photochemical yield of photosystem II Fv_Fm
Coral pulse amplitude modulation (PAM) fluorometry data from a heating experiment using samples collected from Nikko Bay and Rebotel Reef in Palau in the spring of 2018Maximum quantum yield of photosystem II measured by PAM fluorometer (relative units) Fv_Fm
Quantification of photosynthetic capacity of cells using a laser induction of chlorophyll autofluorescenceFv/Fm. Maximum quantum yield of photochemistry in PSII(dimensionless). This parameter characterizes the efficiency of primary photosynthetic reactions. Fv_Fm
Physiological responses of the coral host and associated endosymbionts measured during two experiments testing the effects of acute and chronic thermal stress on the scleractinian coral, Stylophora pistillatameasurements of dark adapted maximum quantum yield of photosystem II of the algal symbionts (Fv/Fm) for each ramet FvFm
Measurements of fluorescence of photosystem II in Plocamium cartilagineum under various and pCO2 and temperature conditionsEffective (or Optimal if dark-adapted) quantum yield. Calculated as Yield = (Fm - F)/Fm Yield
Photosystem II (PSII) photochemical efficiency (Yield PSII) recorded at noon (ΔF/Fm') and at dusk (Fv/Fm) on random coral colonies of Orbicella faveolata from Varadero and Rosario reefs, Colombia, May 2017minimal Chl a fluorescence yield F
Photosystem II (PSII) photochemical efficiency (Yield PSII) recorded at noon (ΔF/Fm') and at dusk (Fv/Fm) on random coral colonies of Orbicella faveolata from Varadero and Rosario reefs, Colombia, May 2017maximal Chl a fluorescence yield (= Fm when measured at dusk and Fm' when measured at noon) Fm_prime
Photosystem II (PSII) photochemical efficiency (Yield PSII) recorded at noon (ΔF/Fm') and at dusk (Fv/Fm) on random coral colonies of Orbicella faveolata from Varadero and Rosario reefs, Colombia, May 2017maximum or effective photochemical efficiency of Photosystem II when measurement takes place at dusk (Fv/Fm) or at noon (?F/Fm') respectively Yield_PSII
Photosystem II (PSII) photochemical efficiency (Yield PSII) recorded at noon (ΔF/Fm') and at dusk (Fv/Fm) on corals from the species Orbicella faveolata, transplanted from Varadero and Rosario reefs, Colombia, May 2017minimal Chl a fluorescence yield F
Photosystem II (PSII) photochemical efficiency (Yield PSII) recorded at noon (ΔF/Fm') and at dusk (Fv/Fm) on corals from the species Orbicella faveolata, transplanted from Varadero and Rosario reefs, Colombia, May 2017maximal Chl a fluorescence yield (= Fm when measured at dusk and Fm' when measured at noon) Fm_prime
Photosystem II (PSII) photochemical efficiency (Yield PSII) recorded at noon (ΔF/Fm') and at dusk (Fv/Fm) on corals from the species Orbicella faveolata, transplanted from Varadero and Rosario reefs, Colombia, May 2017maximum or effective photochemical efficiency of Photosystem II when measurement takes place at dusk (Fv/Fm) or at noon (?F/Fm') respectively Yield_PSII
Coral physiology data (Fv/Fm) on four collected coral species from six sites in the Red Sea from 2018 to 2020measurement of dark-adapted maximum quantum yield of photosystem II of the algal symbionts (Fv/Fm) for each ramet FvFm
Series 1A: Two-stressor effects on Tp-1335: Experiments to investigate the combined effect of light and temperature changes on the growth rate of Thalassiosira pseudonana CCMPQY=F_v/F_m where F_v is the maximal variable fluorescence and F_m is the maximal fluorescence intensity QY
Series 1B: Four follow-up experiments on the combined effect of light and temperature changes on the growth rate (mu) of Thalassiosira pseudonana CCMP 1335 conducted to supplement series 1A experimentsthe quantum yield: QY=Fv/Fm; where Fv is the maximal variable fluorescence and Fm is the maximal fluorescence intensity QY
Series 1B-3: Multiple stressor experiments on T. pseudonana (CCMP1335) – computed data from the LC3 protocol for samples at 4 temperatures, 15-26CThe first measurement of the instantenous photosystem II quantum yield following exposure to actinic light at 10 micro-mol photons·m-2·sec-1 for 60 seconds (L1 indicates the first measurement in the "light" phase) QY_L1
Series 1B-3: Multiple stressor experiments on T. pseudonana (CCMP1335) – computed data from the LC3 protocol for samples at 4 temperatures, 15-26CThe second measurement of the instantenous photosystem II quantum yield following exposure to actinic light at 20 micro-mol photons·m-2·sec-1 for 60 seconds (L1 indicates the first measurement in the "light" phase) QY_L2
Series 1B-3: Multiple stressor experiments on T. pseudonana (CCMP1335) – computed data from the LC3 protocol for samples at 4 temperatures, 15-26CThe third measurement of the instantenous photosystem II quantum yield following exposure to actinic light at 50 micro-mol photons·m-2·sec-1 for 60 seconds (L1 indicates the first measurement in the "light" phase) QY_L3
Series 1B-3: Multiple stressor experiments on T. pseudonana (CCMP1335) – computed data from the LC3 protocol for samples at 4 temperatures, 15-26CThe fourth measurement of the instantenous photosystem II quantum yield following exposure to actinic light at 100 micro-mol photons·m-2·sec-1 for 60 seconds (L1 indicates the first measurement in the "light" phase) QY_L4
Series 1B-3: Multiple stressor experiments on T. pseudonana (CCMP1335) – computed data from the LC3 protocol for samples at 4 temperatures, 15-26CThe fifth measurement of the instantenous photosystem II quantum yield following exposure to actinic light at 300 micro-mol photons·m-2·sec-1 for 60 seconds (L1 indicates the first measurement in the "light" phase) QY_L5
Series 1B-3: Multiple stressor experiments on T. pseudonana (CCMP1335) – computed data from the LC3 protocol for samples at 4 temperatures, 15-26CThe sixth measurement of the instantenous photosystem II quantum yield following exposure to actinic light at 500 micro-mol photons·m-2·sec-1 for 60 seconds (L1 indicates the first measurement in the "light" phase) QY_L6
Series 1B-3: Multiple stressor experiments on T. pseudonana (CCMP1335) – computed data from the LC3 protocol for samples at 4 temperatures, 15-26CThe seventh measurement of the instantenous photosystem II quantum yield following exposure to actinic light at 1000 micro-mol photons·m-2·sec-1 for 60 seconds (L1 indicates the first measurement in the "light" phase) QY_L7
Series 1B-3: Multiple stressor experiments on T. pseudonana (CCMP1335) – computed data from the LC3 protocol for samples at 4 temperatures, 15-26CThe maximum Quantum yield. A measure of the Photosystem II efficiency. In a dark-adapted sample this is equivalent to Fv/Fm. In a light-adapted sample it is equivalent to Fv’/Fm’. QY_max
Series 2A-2: Multiple stressor experiments on T. pseudonana (CCMP1014) – photophysiologyThe first measurement of the instantenous photosystem II quantum yield following exposure to actinic light at 10 micro-mol photons·m-2·sec-1 for 60 seconds (L1 indicates the first measurement in the "light" phase) QY_L1