Tree Core Increment Data, Watershed 4, Hubbard Brook Experimental Forest, 1985-1986
TITLE
Tree Core Increment Data, Watershed 4, Hubbard Brook Experimental Forest, 1985-1986
PRINCIPAL INVESTIGATOR(s)
Eunshik Kim
College Of Forestry, Department of Forest Resources, Kookmin University
861-1 Chongnung-Dong
Songbuk-gu, Seoul 136-702
Republic Of Korea
OTHERS INVOLVED
Herb Bormann
ABSTRACT:
Time series of annual tree ring increments were collected on Watershed 4 during the winter of 1985-1986 for trees of four species: beech, white ash, yellow birch, and sugar maple. The purpose of the study was to compare these time series with a selection of measured and derived environmental variables to develop a more sensitive model of tree diameter growth.
KEYWORD SET: Hubbard Brook Ecosystem Study LTER
dendrochronology, HBEF Watershed 4, HBR, Hubbard Brook LTER, increment, tree, tree core, tree ring, vegetation, watersheds.
KEYWORD SET: LTER Core Research Areas
primary production.
BEGIN DATE
1985
END DATE
1986
LOCATION
The study site was selected at a stand (approximately 2 ha in area) below WS4. The slope of the site is 10-20 degrees facing southeast. Site elevation is 445-480 m.
West bounding coordinate: -71.736711
East bounding coordinate: -71.725126
North bounding coordinate: 43.958440
South bounding coordinate: 43.949834
Elevation
Minimum: 445
Maximum: 480
(Unit: meter)
SAMPLING DESIGN
During the winter of 1985-1986, 145 trees were selected from dominant and co-dominant trees of the 4 species at the study site. Each species included at least 30 trees. Two cores were taken from each tree using an increment borer (0.5 cm in diameter). To reduce the variability due to slope, cores were taken from two directions perpendicular to slope at the height of 1.0-1.2 m above ground. In coring, efforts were made to pass through the pith of stem. The cores were dried and glued onto wood mounts, then air-dried and fine sanded. Tree ring widths were initially measured using a Measuchron. In order to reduce error in dating the age of each core, the cores were cross-dated by checking the correspondence of growth patterns in some typical years using microscope examination and computer graphics.
DATA DESCRIPTION
Time series of annual tree ring increments were collected for trees of four species: beech, white ash, yellow birch, and sugar maple. The purpose of the study was to compare these time series with a selection of measured and derived environmental variables to develop a more sensitive model of tree diameter growth.
REFERENCES
  • Kim, Eunshik 1988. Radial Growth Patterns of Tree Species in Relation to Environmental Factors. PhD, Yale University.
DATA ACCESS GUIDELINES
Data Use Policy



The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. Permission to use this dataset is granted to the Data User free of charge subject to the following terms:

1) Acceptable use. Use of the dataset will be restricted to academic, research, government or other not-for-profit professional purposes.

2) Redistribution. The data and metadata are provided for use by the Data User. The Data User will not redistribute the original Data Set or metadata to others without the explicit permission of the Principal Investigator.

3) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly attribute the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. Citation should take the following general form: Creator, Year of Data Publication, Title of Dataset, Publisher, Dataset identifier.

Citation example: Holmes, R.T. 2012. Bird Abundances at Hubbard Brook (1969-2010) and on three replicate plots (1986-2000) in the White Mountain National Forest. Durham, NH. Hubbard Brook Data Archive [Database]. http://hubbardbrook.org/data/dataset.php?id=81 (23 July 2012)

4) Acknowledgment: The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed to its content. Acknowledgments should identify the supporting party, the party that received the support, and any identifying information such as grant numbers.

Acknowledgment example: Data on [topic] were provided by [name of PI] on [date]. 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, Newtown Square, PA. Significant funding for collection of these data was provided by [agency]-[grant number], [agency]-[grant number], etc.

5) Consultation and questions. Data users are strongly encouraged to consult with the Principal Investigator(s) who collected these data for further information. Also, when appropriate, Data Users should consider including the Principal Investigator as a collaborator and/or co-author in the use of these data.

6) Notification. The Data User will notify the Principal Investigator of any publication or derivative work based on the Data Set. The Data User will also provide the Principal Investigator and/or the administrator of the Hubbard Brook Ecosystem Study with a pdf or two reprints of any publication(s) resulting from use of the Data Set.

7) Disclaimer. While substantial efforts are made to ensure the accuracy of data and documentation contained in this Data Set, complete accuracy of data and metadata cannot be guaranteed. All data and metadata are made available "as is". The Data User holds all parties involved in the production or distribution of the Data Set harmless for damages resulting from its use or interpretation.

8) Terms of Agreement. By accepting this Data Set, the Data User agrees to abide by the terms of this agreement. The Data Owner shall have the right to terminate this agreement immediately by written notice upon the Data User's breach of, or non-compliance with, any of its terms. The Data User may be held responsible for any misuse that is caused or encouraged by the Data User's failure to abide by the terms of this agreement.



CONTACT PERSON

Information Manager, Hubbard Brook LTER
234 Mirror Lake Road
North Woodstock, NH 03262
USA

Phone: (603) 726-8902
Email: hbr-im@lternet.edu

Data file: treecoredata.txt
Description: Tree core increments data at the Hubbard Brook Experimental Forest
Notes on Data: NOTES How to read sample data: ID__TR__P__S__ST__D__AG__YR__FR____T_______R________DATE 1___1___1__2__1___1__92__90__1985__190.25__188.005__09-18-1986 2___1___1__2__1___2__92__81__1985__173.36__158.388__09-19-1986 No 1 tree, species 2, in plot 1, site 1. Two cores were taken from the tree. For the first core, only 90 rings were read and two rings were not separately read. For the second core, only 81 rings were read and eleven rings were not separately read. The age of the tree was estimated to be 92 years. By the difference of the T (total estimated radius), the stem seems to have a non-concentric circle. The data is physically located at the USDA Forest Service, Durham, NH and was last updated in 1986.
ColumnVariableDescriptionUnitsCoded?Missing value label
1IDTree IDnoneynone
2YEARYear of radical incrementYYYYnnone
3INC_MMWidth of radial increment measured in mmmillimeternnone

CODES

Variable: ID
Description:
A > 0 integer tree identifier

Data file: treecoreinfo.txt
Description: Tree core info
Notes on Data: NOTES How to read sample data: ID__TR__P__S__ST__D__AG__YR__FR____T_______R________DATE 1___1___1__2__1___1__92__90__1985__190.25__188.005__09-18-1986 2___1___1__2__1___2__92__81__1985__173.36__158.388__09-19-1986 No 1 tree, species 2, in plot 1, site 1. Two cores were taken from the tree. For the first core, only 90 rings were read and two rings were not separately read. For the second core, only 81 rings were read and eleven rings were not separately read. The age of the tree was estimated to be 92 years. By the difference of the T (total estimated radius), the stem seems to have a non-concentric circle. The data is physically located at the USDA Forest Service, Durham, NH and was last updated in 1986.
ColumnVariableDescriptionUnitsCoded?Missing value label
1IDTree core IDnoneynone
2TRTree numbernoneynone
3PPlotnoneynone
4SSpeciesnoneynone
5STSitenoneynone
6DDirection of tree core (see methods)noneynone
7AG(Estimated) total age (in years)numbernnone
8YRReliable number of years for reading the incrementsnumbernnone
9FRInitial year to read coresYYYYnnone
10TTotal (estimated) radius readmillimeternnone
11RReliable radius of the cores read for YR yearsmillimeternnone
12DATEDate the core was readMM-DD-YYYYnnone

CODES

Variable: ID
Description:
A >0 integer tree core identifier
Variable: TR
Description:
A >0 integer tree number
Variable: P
Description:
A counting number plot identifier
Variable: S
Code
Description
1
Fraxinus americana
2
Fagus grandifolia
3
Acer saccharum
4
Betula allegheniensis
Variable: ST
Description:
A >0 integer identifying the site number
Variable: D
Code
Description
1
Direction 1
2
Direction 2