Continuous Revegetation Survey Data, Watershed 5, Hubbard Brook Experimental Forest, 1984 - 1989
TITLE
Continuous Revegetation Survey Data, Watershed 5, Hubbard Brook Experimental Forest, 1984 - 1989
PRINCIPAL INVESTIGATOR(s)
Tim Fahey
Dept. Of Natural Resources, Cornell University
Fernow Hall
Ithaca, NY 14853
USA

Phone: (607) 255-5470
OTHERS INVOLVED
J. W. Hughes
ABSTRACT:
During the first five years after harvest of Watershed 5, detailed measurements of recovering vegetation were conducted on a large set of permanent plots. Results are summarized in Hughes and Fahey (1991) and Pu et al. (1993). Measurements on these plots were discontinued in 1989 and replaced by measurements on a smaller set of larger plots. Those data are not included in this dataset.
KEYWORD SET: Hubbard Brook Ecosystem Study LTER
clearcut, HBEF Watershed 5, HBR, Hubbard Brook LTER, tree, vegetation, watershed.
KEYWORD SET: LTER Core Research Areas
disturbance, primary production.
BEGIN DATE
1984-07-01
END DATE
1989-07-01
LOCATION
Watershed 5 at the Hubbard Brook Experimental Forest, NH
West bounding coordinate: -71.739375
East bounding coordinate: -71.731253
North bounding coordinate: 43.957167
South bounding coordinate: 43.948942
LOCATION DESCRIPTION
W5 is gridded into grid cells measuring 25x25 meters(625m2), the corners of which are marked with painted wooden stakes and orange poles; the pole located in the northwest corner bears the cell number. The permanent plots censused for the revegetation project are located within eight of the grid cells: cell numbers 171, 181, 250, 259, 289, 296, 343, and 350. Each of the surveyed cells is divided into twenty-five 5x5 meter (25m2) permanent plots, numbered from left to right, which are delineated by nylon cord and fiberglass stakes. The 25 meter-square plots are subsequently divided into twenty-five 1 meter-square quadrats, again numbered from left to right, with lengths of PVC pipe marking the corners of each. These quadrats are then subdivided into four 0.5 meter-square quadrants, numbered 1 - 4, the peripheries of which are not demarcated.
SAMPLING DESIGN AND FILE STRUCTURE
Prior to clearcutting, Watershed 5 was gridded into 25 meter-square cells, a random representation of which was chosen for vegetation sampling. The selected cells were subsequently divided into 5 meter-square permanent plots. Soon after the 1983-84 harvest, those permanent plots that remained intact were divided into 1 meter-square quadrats, each comprised of four, 0.5 meter-square quadrants. The extent of soil disturbance in each of the quadrants was determined, and was categorized as "undisturbed", "scarified", or "severely disturbed"; the degree of disturbance was rated from 0 = undisturbed to 5 = mineral soil (1 = scarified, 2 - 4 = various degrees of topsoil removal). Revegetation in all designated quadrants determined to be free of soil disturbance following the clearcutting was surveyed and quantified every August - September from 1984 - 1989, whereas disturbed areas were surveyed infrequently.
To ensure accurate assessment, quadrant dividers were constructed to separate each of the 1 meter-square quadrats into its four constituent quadrants. On raw data sheets, species codes (letters/symbols) were entered within each quadrant censused, and regrowth was quantified by assessing the number of stems per species, or the percentage of coverage. The regenerative type (i.e. seedling, sprout or advanced regeneration) of each surveyed plant was also recorded, as were any notable observations such as browsing or the mortality of woody species. A list of species codes and symbols follows.
The revegetation census data was recorded in EXCEL files, organized by grid cell number and year. These files have been translated into ASCII files. Each file consists of a spreadsheet arranged as follows: the first column contains the year the plots were censused; the second column contains the grid cell number; the third column contains the permanent plot number; the fourth column contains the quadrant code. The computer code for each quadrant consists of the quadrat number followed by the quadrant number (i.e. quadrant #1 of quadrat #14 has the code "141"). The codes range from "11" (for quadrant #1 of quadrat #1) to "254" (for quadrant #4 of quadrat #25). The remaining columns are reserved for plant species codes. Permanent columns were established for the most common species.
DATA DESCRIPTION
In order to study the extent of post - clearcut revegetation over time, the numbers and regenerative types of individual plants of herbaceous and woody species, growing in established permanent plots within the clearcut watershed, were recorded annually from 1984 through 1989.
REFERENCES
  • Hughes, J.W., and Fahey, T.J. 1985. Regeneration strategies following whole-tree harvest of a northern hardwood forest. Bull. Ecol. Soc. Amer. 66(2):198.
  • Hughes, J.W., and Fahey, T.J. 1991. Colonization dynamics of herbs and shrubs in a disturbed northern hardwood forest. J. Ecology 79(3):605-616.
  • Pu, M., Fahey, T.J., and Hughes, J.W. 1993. Effects of soil disturbance on vegetation recovery and nutrient accumulation following whole-tree harvest of a northern hardwood ecosystem. J. Appl. Ecol. 30:661-675.
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.

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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: hbw5.txt
Description: W5 Continuous Revegetation Survey data
Notes on Data: Although the actual method of collecting data did not technically change over the years, the surveys were performed by various people, resulting in the occasional alteration or misuse of codes and/or symbols. Data collected for grid cell 296 is missing. The data is physically located at the USDA Forest Service in Durham, NH and was last updated in 1989.
ColumnVariableDescriptionUnitsCoded?Missing value label
1yrYearYYnnone
2grid cellNumbered grid cellnoneynone
3plotNumbered plotnoneynone
4quadNumbered quadrantnoneynone
5dist. classDisturbance classnoney
-99
6PPin Cherry: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
7P/Pin Cherry (advanced regeneration): The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
8MSugar maple: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
9M/Sugar maple (advanced regeneration): The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
10MxSugar maple (sprout): The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
11BBeech: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
12B/Beech (advanced regeneration): The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
13BxBeech (sprout): The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
14tStriped Maple: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
15t/Striped Maple (advanced regeneration): The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
16txStriped Maple (sprout): The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
17DWood Fern: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
18HHayscented fern: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
19RBirch seedling: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
20VViburnum: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
21rRaspberry: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
22NElderberry (> 1 yr old): The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
23EViolet: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
24SSedge: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
25AAster: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
26?Questionable species: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
27M//Sugar maple (meaning unknown): The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
28B//Beech (meaning unknown): The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
29t//Stripled Maple (meaning unknown): The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
30othersOthers: The number of stems (or percent cover), plus coded symbols for other relevant information INCLUDING species. Multiple codes present indicate multiple descriptions for the same data point.noney
-99
31YYellow Birch: The number of stems (or percent cover), plus coded symbols for other relevant information. Multiple codes present indicate multiple descriptions for the same data point.noney
-99

CODES

Variable: grid cell
Description:
A counting number representing an existent grid cell (171, 181, 250, 259, 289, 296, 343, or 350).
Variable: plot
Description:
A counting number representing an existent plot
Variable: quad
Description:
A counting number representing an existent quadrant
Variable: dist. class
Code
Description
0
undisturbed
1
scarified
2
lowest of 3 varying degrees of topsoil removal
3
middle of 3 varying degrees of topsoil removal
4
highest of 3 varying degrees of topsoil removal
5
mineral soil
F
meaning unknown
Variable: P through t//, and Y (columns 6 through 29, and 31)
Code
Description
/
advanced regeneration (> 1 yr old)
v, ,>
browsed
+
dead
%, *, = number
percent cover (eg 50%)
?
questionable species
x, X
sprout
//
meaning unknown
Variable: others (species codes included, in addition to status codes)
Code
Description
/
advanced regeneration (> 1 yr old)
v, ,>
browsed
+
dead
%, *, = number
percent cover (eg 50%)
?
questionable species
x, X
sprout
//
meaning unknown
Q
Ash
a
Aspen
A
Aster
B
Beech
b
Blackberry
R
Birch Seedling
C
Clintonia
c
Cornus
d
Delicate fern
l
Elderberry (>= 1 yr old)
N
Elderberry (> 1 yr old)
F
Fir
G, g
Grass
h
Hemlock
I, IC
Indian Cucumber
j
Jack in the Pulpit
L
Lycopodium
m
Maianthemum
mm
Mountain Maple
NYF, nyf
New York Fern
O, theta
Oxalis
p
Partridge Berry
P
Pin Cherry
r
Raspberry
f
Red Maple
S
Sedge
SD
Solidago
Z, z, SB, sb
Sorbus
SP, sp
Spruce
s
Solomon's Seal
t
Striped Maple
t
Sugar Maple
T
Trillium
U, u
Uvularia
V
Viburnum
E
Violet
W, WB
White Birch
D
Wood Fern
Y
Yellow Birch

MISSING VALUE CODES
Variable
Missing Value Code
Code Explanation
dist. class
-99
Data missing
P
-99
Data missing
P/
-99
Data missing
M
-99
Data missing
M/
-99
Data missing
Mx
-99
Data missing
B
-99
Data missing
B/
-99
Data missing
Bx
-99
Data missing
t
-99
Data missing
t/
-99
Data missing
tx
-99
Data missing
D
-99
Data missing
H
-99
Data missing
R
-99
Data missing
V
-99
Data missing
r
-99
Data missing
N
-99
Data missing
E
-99
Data missing
S
-99
Data missing
A
-99
Data missing
?
-99
Data missing
M//
-99
Data missing
B//
-99
Data missing
t//
-99
Data missing
others
-99
Data missing
Y
-99
Data missing