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Dataset Title:  Rates of photosynthesis and respiration by Ulva exposed to different average
and variability of pCO2 (Seaweed OA Resilience project)
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Institution:  BCO-DMO   (Dataset ID: bcodmo_dataset_732625)
Information:  Summary ? | License ? | ISO 19115 | Metadata | Background (external link) | Files | Make a graph
 
Variable ?   Optional
Constraint #1 ?
Optional
Constraint #2 ?
   Minimum ?
 
   Maximum ?
 
 Label (unitless) ?          "T2-P01.1"    "T4-P08.1"
 pCO2_avg (microatmospheres (µatm)) ?          248    962
 pCO2_sd (microatmospheres (µatm)) ?          36.22    1827.8
 Off1C (milligrams O2/liter/second (mg L-1 s-1)) ?          -0.0026844    -2.7471E-5
 OnC (milligrams O2/liter/second (mg L-1 s-1)) ?          -5.5738E-4    0.008294
 Off2C (milligrams O2/liter/second (mg L-1 s-1)) ?          -0.0020771    -3.3332E-4
 Off1A (milligrams O2/liter/second (mg L-1 s-1)) ?          -0.0035805    -2.8366E-4
 OnA (milligrams O2/liter/second (mg L-1 s-1)) ?          -1.71393E-4    0.0070203
 Off2A (milligrams O2/liter/second (mg L-1 s-1)) ?          -0.0015834    -2.3486E-4
 Fresh_Weight (grams) ?          0.0124    0.365
 DRespC (mol O2/g/min NA) ?          -3.375149402    -0.040398529
 PmaxC (mol O2/g/min NA) ?          -0.687557068    8.886336207
 LRespC (mol O2/g/min NA) ?          -3.103237052    -0.164494121
 DRespA (mol O2/g/min NA) ?          -3.323483911    -0.152730795
 PmaxA (mol O2/g/min NA) ?          -0.211422715    9.567512376
 LRespA (mol O2/g/min NA) ?          -1.657299919    -0.15860043
 
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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Label {
    String bcodmo_name "sample";
    String description "sample identifier formatted as: trial-culture pot.plant replicate numbers";
    String long_name "Label";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P02/current/ACYC/";
    String units "unitless";
  }
  pCO2_avg {
    Int16 _FillValue 32767;
    Int16 actual_range 248, 962;
    String bcodmo_name "pCO2";
    String description "Average pCO2 partial pressure in seawater tanks";
    String long_name "P CO2 Avg";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/PCO2C101/";
    String units "microatmospheres (µatm)";
  }
  pCO2_sd {
    Float32 _FillValue NaN;
    Float32 actual_range 36.22, 1827.8;
    String bcodmo_name "pCO2";
    Float64 colorBarMaximum 50.0;
    Float64 colorBarMinimum 0.0;
    String description "Variability of pCO2 partial pressure - standard deviation";
    String long_name "P CO2 Sd";
    String nerc_identifier "https://vocab.nerc.ac.uk/collection/P01/current/PCO2C101/";
    String units "microatmospheres (µatm)";
  }
  Off1C {
    Float32 _FillValue NaN;
    Float32 actual_range -0.0026844, -2.7471e-5;
    String bcodmo_name "respiration";
    String description "slope of oxygen exchange during first dark period in pCO2 culture seawater";
    String long_name "Off1 C";
    String units "milligrams O2/liter/second (mg L-1 s-1)";
  }
  OnC {
    Float32 _FillValue NaN;
    Float32 actual_range -5.5738e-4, 0.008294;
    String bcodmo_name "respiration";
    String description "slope of oxygen exchange during light period in pCO2 culture seawater";
    String long_name "On C";
    String units "milligrams O2/liter/second (mg L-1 s-1)";
  }
  Off2C {
    Float32 _FillValue NaN;
    Float32 actual_range -0.0020771, -3.3332e-4;
    String bcodmo_name "respiration";
    String description "slope of oxygen exchange during second dark period in pCO2 culture seawater";
    String long_name "Off2 C";
    String units "milligrams O2/liter/second (mg L-1 s-1)";
  }
  Off1A {
    Float32 _FillValue NaN;
    Float32 actual_range -0.0035805, -2.8366e-4;
    String bcodmo_name "respiration";
    String description "slope of oxygen exchange during first dark period in aerated standard seawater";
    String long_name "Off1 A";
    String units "milligrams O2/liter/second (mg L-1 s-1)";
  }
  OnA {
    Float32 _FillValue NaN;
    Float32 actual_range -1.71393e-4, 0.0070203;
    String bcodmo_name "respiration";
    String description "slope of oxygen exchange during light period in aerated standard seawater";
    String long_name "On A";
    String units "milligrams O2/liter/second (mg L-1 s-1)";
  }
  Off2A {
    Float32 _FillValue NaN;
    Float32 actual_range -0.0015834, -2.3486e-4;
    String bcodmo_name "respiration";
    String description "slope of oxygen exchange during second dark period in aerated standard seawater";
    String long_name "Off2 A";
    String units "milligrams O2/liter/second (mg L-1 s-1)";
  }
  Fresh_Weight {
    Float32 _FillValue NaN;
    Float32 actual_range 0.0124, 0.365;
    String bcodmo_name "mass";
    String description "Mass of tissue sample";
    String long_name "Fresh Weight";
    String units "grams";
  }
  DRespC {
    Float64 _FillValue NaN;
    Float64 actual_range -3.375149402, -0.040398529;
    String bcodmo_name "respiration";
    String description "Dark respiration rate during first dark period in pCO2 culture seawater";
    String long_name "DResp C";
    String units "mol O2/g/min  NA";
  }
  PmaxC {
    Float64 _FillValue NaN;
    Float64 actual_range -0.687557068, 8.886336207;
    String bcodmo_name "Pmax";
    String description "Maximum rate of photosynthesis in pCO2 culture seawater";
    String long_name "Pmax C";
    String units "mol O2/g/min  NA";
  }
  LRespC {
    Float64 _FillValue NaN;
    Float64 actual_range -3.103237052, -0.164494121;
    String bcodmo_name "respiration";
    String description "Estimated respiration in the light in pCO2 culture seawater";
    String long_name "LResp C";
    String units "mol O2/g/min  NA";
  }
  DRespA {
    Float64 _FillValue NaN;
    Float64 actual_range -3.323483911, -0.152730795;
    String bcodmo_name "respiration";
    String description "Dark respiration rate during first dark period in aerated standard seawater";
    String long_name "DResp A";
    String units "mol O2/g/min  NA";
  }
  PmaxA {
    Float64 _FillValue NaN;
    Float64 actual_range -0.211422715, 9.567512376;
    String bcodmo_name "Pmax";
    String description "Maximum rate of photosynthesis in aerated standard seawater";
    String long_name "Pmax A";
    String units "mol O2/g/min  NA";
  }
  LRespA {
    Float64 _FillValue NaN;
    Float64 actual_range -1.657299919, -0.15860043;
    String bcodmo_name "respiration";
    String description "Estimated respiration in the light in aerated standard seawater";
    String long_name "LResp A";
    String units "mol O2/g/min  NA";
  }
 }
  NC_GLOBAL {
    String access_formats ".htmlTable,.csv,.json,.mat,.nc,.tsv";
    String acquisition_description 
"Measurements of photosynthesis and respiration of Ulva lactuca occurred at the
end of 3 weeks of acclimation to various levels of ocean acidification at
15\\u00b0C. Small circular sections of U. lactuca thalli used for measurements
were sampled with a cork borer the evening before measurement and returned to
culture conditions overnight to allow for wound healing. Plant sections used
to estimate rates of photosynthesis and respiration from oxygen exchange
measurements were placed in small white, mesh threaded bags designed to fit
the diameter of the cuvette chamber so that the plant material was oriented
perpendicularly to the light source provided in the Qubit Systems Dissolved
Oxygen package. Prior to introducing plants to the cuvette chamber, oxygen
exchange between the stirred seawater and electrode system (i.e., oxygen
consumption by the electrode) was monitored to adjust for its effect on
subsequent measurements in the presence of plant material. Sections were
transferred to the cuvette containing a magnetic stirring bar and 3 ml of
seawater corresponding to the average pCO2 level in their particular culture
pot and placed in darkness for 10-15 minutes prior to beginning measurement.
Once measurements began, output of oxygen exchange was monitored until a
steady state of oxygen exchange was attained (typically within 10 minutes) in
either darkness or light. Photosynthesis and respiration were measured at
15\\u00b0C and ~550, and 0, \\u00b5mole photons m-2 s-1, respectively; the same
temperature and light conditions as in growth culture. Respiration was
measured both following a \\u226510 minute acclimation period in darkness prior
to light exposure (dark respiration) and again in darkness immediately
following exposure to the saturating light intensity (as an estimate of
respiration that occurs in the light). Following these measurements in
seawater at their culture pCO2 level, the seawater in the cuvette was replaced
with standard air-saturated seawater at 15\\u00b0C and the measurement process
described above was repeated for measurements of respiration in the dark and
\\u2018light\\u2019 and photosynthesis. After measurements of gas exchange, the
mass of plant tissue was measured on an analytical balance.
 
Note: Trial 1 was a pilot test of culture system and methodological procedures
so was not used for data collection.";
    String awards_0_award_nid "55177";
    String awards_0_award_number "OCE-1316198";
    String awards_0_data_url "http://www.nsf.gov/awardsearch/showAward?AWD_ID=1316198";
    String awards_0_funder_name "NSF Division of Ocean Sciences";
    String awards_0_funding_acronym "NSF OCE";
    String awards_0_funding_source_nid "355";
    String awards_0_program_manager "David L. Garrison";
    String awards_0_program_manager_nid "50534";
    String cdm_data_type "Other";
    String comment 
"Ulva_PS_Resp_Cult_AirSat - Ulva 
   Rates of photosynthesis and respiration exposed to different average and variability of pCO2  
   PI's: J. Kubler, S. Dudgeon (CSU-Northridge) 
   version: 2018-03-26";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_type "institution";
    String creator_url "https://www.bco-dmo.org/";
    String data_source "extract_data_as_tsv version 2.3  19 Dec 2019";
    String date_created "2018-03-28T20:40:42Z";
    String date_modified "2019-06-03T17:29:10Z";
    String defaultDataQuery "&time<now";
    String doi "10.1575/1912/bco-dmo.732625.1";
    String history 
"2022-09-27T14:34:35Z (local files)
2022-09-27T14:34:35Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_732625.html";
    String infoUrl "https://www.bco-dmo.org/dataset/732625";
    String institution "BCO-DMO";
    String instruments_0_acronym "Dissolved Oxygen Sensor";
    String instruments_0_dataset_instrument_description "Used to measure oxygen, photosynthesis, and respiration.http://www.qubitbiology.com/ox1lp-dissolved-oxygen/";
    String instruments_0_dataset_instrument_nid "732633";
    String instruments_0_description "An electronic device that measures the proportion of oxygen (O2) in the gas or liquid being analyzed";
    String instruments_0_instrument_name "Dissolved Oxygen Sensor";
    String instruments_0_instrument_nid "705";
    String instruments_0_supplied_name "Qubit Systems Dissolved Oxygen package (Q-box OX1LP)";
    String instruments_1_acronym "Scale";
    String instruments_1_dataset_instrument_nid "732631";
    String instruments_1_description "An instrument used to measure weight or mass.";
    String instruments_1_instrument_external_identifier "https://vocab.nerc.ac.uk/collection/L05/current/LAB13/";
    String instruments_1_instrument_name "Scale";
    String instruments_1_instrument_nid "714";
    String instruments_1_supplied_name "Mettler Toledo AG204 Delta Range Analytical Balance";
    String keywords "average, bco, bco-dmo, biological, carbon, carbon dioxide, chemical, co2, data, dataset, dioxide, dmo, dresp, DRespA, DRespC, erddap, fresh, Fresh_Weight, label, lresp, LRespA, LRespC, management, oceanography, off1, Off1A, Off1C, off2, Off2A, Off2C, office, OnA, OnC, pCO2_avg, pCO2_sd, pmax, PmaxA, PmaxC, preliminary, weight";
    String license "https://www.bco-dmo.org/dataset/732625/license";
    String metadata_source "https://www.bco-dmo.org/api/dataset/732625";
    String param_mapping "{'732625': {}}";
    String parameter_source "https://www.bco-dmo.org/mapserver/dataset/732625/parameters";
    String people_0_affiliation "California State University Northridge";
    String people_0_affiliation_acronym "CSU-Northridge";
    String people_0_person_name "Dr Janet  E Kubler";
    String people_0_person_nid "51681";
    String people_0_role "Principal Investigator";
    String people_0_role_type "originator";
    String people_1_affiliation "California State University Northridge";
    String people_1_affiliation_acronym "CSU-Northridge";
    String people_1_person_name "Dr Steve Dudgeon";
    String people_1_person_nid "51682";
    String people_1_role "Co-Principal Investigator";
    String people_1_role_type "originator";
    String people_2_affiliation "Woods Hole Oceanographic Institution";
    String people_2_affiliation_acronym "WHOI BCO-DMO";
    String people_2_person_name "Nancy Copley";
    String people_2_person_nid "50396";
    String people_2_role "BCO-DMO Data Manager";
    String people_2_role_type "related";
    String project "Seaweed OA Resilience";
    String projects_0_acronym "Seaweed OA Resilience";
    String projects_0_description "Benthic macroalgae contribute to intensely productive near shore  ecosystems and little is known about the potential effects of ocean  acidification on non-calcifying macroalgae. Kübler and Dudgeon will test  hypotheses about two macroalgae, Ulva spp. and Plocamium cartilagineum,  which, for different reasons, are hypothesized to be more productive  and undergo ecological expansions under predicted changes in ocean  chemistry. They have designed laboratory culture-based experiments to  quantify the scope for response to ocean acidification in Plocamium,  which relies solely on diffusive uptake of CO2, and populations of Ulva  spp., which have an inducible concentrating mechanism (CCM). The  investigators will culture these algae in media equilibrated at 8  different pCO2 levels ranging from 380 to 940 ppm to address three key  hypotheses. The first is that macroalgae (such as Plocamium  cartilagineum) that are not able to acquire inorganic carbon in changed  form will benefit, in terms of photosynthetic and growth rates, from  ocean acidification. There is little existing data to support this  common assumption. The second hypothesis is that enhanced growth of Ulva  sp. under OA will result from the energetic savings from down  regulating the CCM, rather than from enhanced photosynthesis per se.  Their approach will detect existing genetic variation for adaptive  plasticity. The third key hypothesis to be addressed in short-term  culture experiments is that there will be a significant interaction  between ocean acidification and nitrogen limited growth of Ulva spp.,  which are indicator species of eutrophication. Kübler and Dudgeon will  be able to quantify the individual effects of ocean acidification and  nitrogenous nutrient addition on Ulva spp. and also, the synergistic  effects, which will inevitably apply in many highly productive, shallow  coastal areas. The three hypotheses being addressed have been broadly  identified as urgent needs in our growing understanding of the impacts  of ocean acidification.";
    String projects_0_end_date "2016-05";
    String projects_0_geolocation "Temperate coastal waters of the USA (30 - 45 N latitude, -66 to -88 W and -117 to -125 W longitude)";
    String projects_0_name "Ocean Acidification: Scope for Resilience to Ocean Acidification in Macroalgae";
    String projects_0_project_nid "2275";
    String projects_0_start_date "2013-06";
    String publisher_name "Biological and Chemical Oceanographic Data Management Office (BCO-DMO)";
    String publisher_type "institution";
    String sourceUrl "(local files)";
    String standard_name_vocabulary "CF Standard Name Table v55";
    String summary "This dataset includes rates of photosynthesis and respiration by Ulva during culture experiments grown at 15 degrees C under various pCO2 levels, during May through July 2015.";
    String title "Rates of photosynthesis and respiration by Ulva exposed to different average and variability of pCO2 (Seaweed OA Resilience project)";
    String version "1";
    String xml_source "osprey2erddap.update_xml() v1.3";
  }
}

 

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