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Climate Change Across Seasons Experiment (CCASE) at the Hubbard Brook Experimental Forest: Branch Xylem Water Isotopic Composition

General Information
Data Package:
Local Identifier:knb-lter-hbr.271.8
Title:Climate Change Across Seasons Experiment (CCASE) at the Hubbard Brook Experimental Forest: Branch Xylem Water Isotopic Composition
Alternate Identifier:DOI PLACE HOLDER
Abstract:

Natural abundance stable isotopes of oxygen, hydrogen, and deuterium-excess in branch xylem water were measured within the Climate Change Across Seasons Experiment (CCASE) plots. There are six plots total (each 11 x 14 m). Two are warmed 5 degrees C throughout the growing season (Plots 3 and 4). Two others are warmed 5 degrees C in the growing season and have snow removed during winter to induce soil freezing and then warming cables turn on to create thaws; each soil freeze/thaw cycle includes 72-hours of soil freezing followed by 72-hours of thaw (Plots 5 and 6). Four kilometers (2.5 mi) of heating cable are buried in the soil to warm these four plots. Two additional plots serve as controls for our experiment (Plots 1 and 2). This data set includes natural abundance stable isotopes of oxygen, hydrogen, and deuterium-excess in branch xylem water from 2018.

These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.

Publication Date:2020-07-14

Time Period
Begin:
2018-06-01
End:
2018-08-31

People and Organizations
Contact:Hubbard Brook Ecosystem Study [  email ]
Creator:Templer, Pamela (Boston University)
Creator:Harrison, Jamie (Boston University)
Creator:Blagden, Megan (Boston University)
Creator:Green, Mark (Case Western Reserve University)
Creator:Salvucci, Guido (Boston University)

Data Entities
Data Table Name:
CCASE_Branch_Xylem_Water_Isotopes
Description:
CCASE Branch Xylem Water Isotopes
Detailed Metadata

Data Entities

Data Table

Data:https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/271/8/9f593f8516656cb8857d47c6f2f40f99
Name:CCASE_Branch_Xylem_Water_Isotopes
Description:CCASE Branch Xylem Water Isotopes
Number of Records:54
Number of Columns:11

Table Structure
Object Name:CCASE_Branch_Xylem_Water_Isotopes.csv
Size:3738 bytes
Authentication:c9d11da78a82ec738f72a97cca51d8ef Calculated By MD5
Text Format:
Number of Header Lines:1
Record Delimiter:\r\n
Orientation:column
Simple Delimited:
Field Delimiter:,
Quote Character:"

Table Column Descriptions
 
Column Name:Site  
Project  
Year  
CollectionDate  
CollectionMonth  
Treatment  
Plot  
TreeID  
delta_18O  
delta_2H  
deuterium_excess  
Definition:Site of experiment (Hubbard Brook Experimental Forest – HBEF)Climate Change Across Seasons Experiment (CCASE)Year of sample collection (2018)Date of sample collectionMonth of sample collectionTreatment type representing ambient soil temperatures (reference), warmed in the growing season (warming) or warmed in the growing season with soil freeze/thaw cycles in winter (warm_FTC)An integer representing plot numberAn integer representing the tree numberNatural abundance branch xylem water 18ONatural abundance branch xylem water 2HNatural abundance branch xylem water deuterium- excess calculated from delta_18O and delta_2H values (deuterium-excess = delta_2H - 8 * delta_18O)
Storage Type:string  
string  
date  
date  
string  
string  
string  
string  
float  
float  
float  
Measurement Type:nominalnominaldateTimedateTimenominalnominalnominalnominalratioratioratio
Measurement Values Domain:
DefinitionSite of experiment (Hubbard Brook Experimental Forest – HBEF)
DefinitionClimate Change Across Seasons Experiment (CCASE)
FormatYYYY
Precision
FormatYYYY-MM-DD
Precision
DefinitionMonth of sample collection
Allowed Values and Definitions
Enumerated Domain 
Code Definition
Codewarm_FTC
Definitionwarmed in the growing season with soil freeze/thaw cycles in winter
Source
Code Definition
Codereference
Definitionambient soil temperatures
Source
Code Definition
Codewarming
Definitionwarmed in the growing season
Source
DefinitionAn integer representing plot number
DefinitionAn integer representing the tree number
Unitpermil
Typereal
Min-9.47 
Max2.01 
Unitpermil
Typereal
Min-70.72 
Max-22.18 
Unitpermil
Typereal
Min-38.23 
Max16.88 
Missing Value Code:                
CodeNA
Expldata not available
CodeNA
Expldata not available
CodeNA
Expldata not available
Accuracy Report:                      
Accuracy Assessment:                      
Coverage:                      
Methods:                      

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data (\"Data User\" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available \"as is.\" The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
LTER Core Research Areasdisturbance
LTER Controlled Vocabularyecosystems, forests, soil temperature, deuterium
HBES Vocabularysoil warming, snow removal, HBR, LTER, Hubbard Brook Ecosystem Study, Hubbard Brook Experimental Forest, New Hampshire, White Mountain National Forest, Climate change across seasons experiment, CCASE, Acer rubrum, branch xylem water
ISO 19115 Topic Categorybiota, climatologyMeteorologyAtmosphere
National Research & Development TaxonomyEcology, Ecosystems, & Environment, Climate change, Climate change effects
stable isotopesstable isotopes

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package
Description:

We collected branch xylem samples on three days that represented the early (June 11), peak (July 9), and late (August 16) growing season in 2018. For the trees, branch xylem water from a 2-5 cm long excised branch xylem sample from each of three mature red maple trees in each plot (n = 18 trees on each sampling day) was sampled between hours 07:00 and 12:00. Samples were taken by shooting down sunlit branches with a shotgun and taking subsamples with clippers. The samples were immediately placed in airtight scintillation vials and stored in a cooler to avoid evaporation. Once in the laboratory, all samples were frozen until analysis.

Water from branch xylem was extracted using a cryogenic vacuum distillation system at the Boston University Stable Isotope Lab (Boston, MA, USA). The extraction time was approximately 60 minutes for branch xylem samples. All branch xylem samples were analyzed for stable isotopic composition using a Liquid Isotope Water Analyzer (LIWA) cavity ringdown spectrometer (Model DLT-100; Los Gatos Research, Mountain View, CA, USA) at Plymouth State University (Plymouth, NH, USA). For each date, the stable isotope ratios of hydrogen and oxygen in each water sample were determined and expressed in standard delta notation (δ2H and δ18O, respectively, permil). Deuterium excess (deuterium-excess = δ2H - 8 * δ18O; Dansgaard, 1964) was calculated for all branch xylem water samples. We corrected for narrow and broadband spectral interference due to the presence of organic compounds using the LGR-SCI software (Version 1.0.0.69; Schultz et al., 2011).

Dansgaard, W., 1964. Stable isotopes in precipitation. Tellus 16, 436–468. https://doi.org/10.3402/tellusa.v16i4.8993

Schultz, N.M., Griffis, T.J., Lee, X., Baker, J.M., 2011. Identification and correction of spectral contamination in 2H/ 1H and 18O/ 16O measured in leaf, stem, and soil water. Rapid Commun. Mass Spectrom. 25, 3360–3368. https://doi.org/10.1002/rcm.5236

People and Organizations

Creators:
Individual: Pamela Templer
Organization:Boston University
Email Address:
ptempler@bu.edu
Id:https://orcid.org/0000-0002-6570-3837
Individual: Jamie Harrison
Organization:Boston University
Email Address:
harrisoj@bu.edu
Id:https://orcid.org/0000-0001-7937-0503
Individual: Megan Blagden
Organization:Boston University
Email Address:
mblagden@bu.edu
Individual: Mark Green
Organization:Case Western Reserve University
Email Address:
mbg78@case.edu
Id:https://orcid.org/0000-0002-7415-7209
Individual: Guido Salvucci
Organization:Boston University
Email Address:
gdsalvuc@bu.edu
Id:https://orcid.org/0000-0003-3609-5972
Contacts:
Organization:Hubbard Brook Ecosystem Study
Email Address:
hbr-im@lternet.edu

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period
Begin:
2018-06-01
End:
2018-08-31
Geographic Region:
Description:CCASE (Climate Change Across Seasons Experiment) plots located north of the Pierce Laboratory.
Bounding Coordinates:
Northern:  43.94688Southern:  43.945197
Western:  -71.702662Eastern:  -71.69936

Project

Parent Project Information:

Title:Environmental Biology (DEB) CAREER: Role of Plant Nutrient Uptake in Forest Nutrient Retention and Carbon Sequestration: an Integrated Research, Teaching and Outreach Program
Personnel:
Individual: Pamela Templer
Organization:Boston University
Email Address:
ptempler@bu.edu
Id:https://orcid.org/0000-0002-6570-3837
Role:Principal Investigator
Funding: National Science Foundation 1149929
Related Project:
Title:Long Term Ecological Research (LTER) at the Hubbard Brook Experimental Forest
Personnel:
Individual: Gary Lovett
Organization:Cary Institute of Ecosystem Studies
Email Address:
lovettg@caryinstitute.org
Id:https://orcid.org/0000-0002-8411-8027
Role:Principal Investigator
Funding: National Science Foundation 1114804
Related Project:
Title:Long Term Ecological Research (LTER) at the Hubbard Brook Experimental Forest
Personnel:
Individual: Gary Lovett
Organization:Cary Institute of Ecosystem Studies
Email Address:
lovettg@caryinstitute.org
Id:https://orcid.org/0000-0002-8411-8027
Role:Principal Investigator
Funding: National Science Foundation 1637685

Maintenance

Maintenance:
Description:complete
Frequency:
Other Metadata

Additional Metadata

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