Long-term trends in abundance of Lepidoptera larvae at Hubbard Brook Experimental Forest and three additional northern hardwood forest sites, 1986 - 1997
TITLE
Long-term trends in abundance of Lepidoptera larvae at Hubbard Brook Experimental Forest and three additional northern hardwood forest sites, 1986 - 1997
PRINCIPAL INVESTIGATOR(s)
Richard T. Holmes
Dartmouth College
ABSTRACT:
Numbers and lengths of Lepidoptera larvae (caterpillars, all species) were censused on shrub level foliage at biweekly intervals from late May/early June through late July/early August each year. This data set includes samples taken at Hubbard Brook Experimental Forest and on three additional plots within the White Mountain National Forest from 1986-1997.
KEYWORD SET: Hubbard Brook Ecosystem Study LTER
caterpillars, HBEF Bird Area, HBR, Hubbard Brook LTER, larvae, lepidoptera, organism, White Mountain National Forest.
KEYWORD SET: LTER Core Research Areas
populations.
BEGIN DATE
1986
END DATE
1997
LOCATION
Hubbard Brook Experimental Forest bird inventory plots.
West bounding coordinate: -71.804985
East bounding coordinate: -71.697350
North bounding coordinate: 43.962128
South bounding coordinate: 43.915932
Mount Moosilauke bird inventory plot, Woodstock NH.
West bounding coordinate: -71.773936
East bounding coordinate: -71.773936
North bounding coordinate: 43.990567
South bounding coordinate: 43.990567
Stinson Mountain bird inventory plot, Rumney NH.
West bounding coordinate: -71.773936
East bounding coordinate: -71.773936
North bounding coordinate: 43.83500
South bounding coordinate: 43.83500
Russell Pond bird inventory plot, Thornton NH.
West bounding coordinate: -71.645864
East bounding coordinate: -71.645864
North bounding coordinate: 44.004677
South bounding coordinate: 44.004677
LOCATION DESCRIPTION
HBEF data were obtained in the 10-ha bird study plot, adjacent to (south/southwest) Wier 6. Other 3 "replicate" sites located outside HBEF, but in White Mountain National Forest at same elevations and aspects and in stands with similar forest history and vegetation. See site descriptions below.
SITE DESCRIPTIONS
SITE: "Hubbard Brook"
GEOGRAPHIC LOCATION: HBEF, Bird Area, adjacent to lower third of watershed 6.
VEGETATION: Northern hardwoods forest (beech, sugar maple, yellow birch)
HISTORY: Selectively logged in early 1900s. Forests approximately 75-90 years of age at time of sampling.

SITE: "Moosilauke"
GEOGRAPHIC LOCATION: 8 km north of HBEF. Plot located 100 m NW of NH route 118, 8 km west of North Woodstock, NH (in township of Woodstock, NH)
VEGETATION: Northern hardwoods forest (beech, sugar maple, yellow birch)
HISTORY: Selectively logged in early 1900s. Forests approximately 75-90 years of age at time of sampling.

SITE: "Russell Pond"
GEOGRAPHIC LOCATION: 11 km NE of HBEF. Plot located 1.2 km SW of Russell Pond, Thornton, NH.
VEGETATION: Northern hardwoods forest (beech, sugar maple, yellow birch)
HISTORY: Selectively logged in early 1900s. Forests approximately 75-90 years of age at time of sampling.

SITE: "Stinson Mountain"
GEOGRAPHIC LOCATION: 13 km SW of HBEF. Plot located 1.7 km E of Stinson Mountain lookout tower, Rumney, NH
VEGETATION: Northern hardwoods forest (beech, sugar maple, yellow birch)
HISTORY: Selectively logged in early 1900s. Forests approximately 75-90 years of age at time of sampling.
DATA DESCRIPTION
Numbers and lengths of Lepidoptera Larvae (caterpillars, all species) censused on shrub level foliage at biweekly intervals from late May/early June through late July/early August each year. Samples taken at HBEF from 1986-1997 on American Beech and Sugar Maple in all years, plus Hobblebush and Striped Maple in 1996 and 1997. Other plots sampled from 1986-1995 on American Beech and Sugar Maple only. Data on numbers and lengths converted to dry weight biomass per 50-leaf unit, using length-weight regression (see "Calculations" below).
SAMPLING DESIGN
Visual censuses of larvae on two 50-leaf samples at each of 40 grid intersection points, located at 50 m intervals, on each tree species (American beech and sugar maple in all years, hobblebush and striped maple in 1996 and 1997 on HBEF plot only). Thus, 4000 leaves of each tree species were searched at 2-week intervals at each site from late May to late July/early August (4-6 sampling periods each year).
CALCULATIONS
Caterpillar biomass determined from a length-weight (dry) regression (J.C. Schultz and R.T. Holmes, unpubl. data; see Rodenhouse 1986, Ph.D. Thesis, Dartmouth College, Hanover, NH). Lengths were measured on animals in situ in the field.
REFERENCES
  • Holmes, R.T., Sherry, T.W., and Sturges, F.W. 1986. Bird community dynamics in a temperate deciduous forest: long-term trends at Hubbard Brook. Ecological Monographs 56:201-220.
  • Holmes, R.T., Sherry, T.W., and Sturges, F.W. 1991. Numerical and demographic responses of temperate forest birds to annual fluctuations in their food resources. Acta International Ornithological Congress 20:1559-1567.
  • Holmes, R.T., and Schultz, J.C. 1988. Food availability for forest birds: effects of prey distribution and abundance on bird foraging. Canadian Journal of Zoology 66:720-728.
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: leps.txt
Description: "Leps.txt" is a text file containing all the lepidoptera data for 1986 - 1997 at Hubbard Brook Experimental Forest and three other sites in the White Mountain National Forest.
Notes on Data: There are no zeros in the dataset (i.e. grid points where no leps were found are not included). Data from American Beech (Fagus grandifolia) and Sugar Maple (Acer saccharum) for all plots are given for the years 1986-1995. Only Hubbard Brook was censused for leps in 1996 and 1997, and in those two years, samples were also obtained from Striped maple (Acer pensylvanica) and Hobblebush (Viburnum alnifolium). Data are given for number, taxon (family level), and biomass conversion (in mg) for larvae found in each 50-leaf sampling unit. The data is physically located at Dartmouth College and was last updated in 1997.
ColumnVariableDescriptionUnitsCoded?Missing value label
1dateSample dateM/DD/YYnnone
2yeardayNominal day of yearnoneynone
3plotPlot numbernoneynone
4countsample group per yearnoneynone
5grid lettergrid letternoneynone
6grid numbergrid numbernoneynone
7tree spectree speciesnoneynone
8tree repreplicate for treenoneynone
9number lepnumber of larvae per 50 leaf samplenumbernnone
10lep specieslepidoptera taxanoneynone
11lep lengthtotal combined length of lepidoptera found on 50 leaf samplemillimeternnone
12lepbio mass(mg)total biomass of lepidoptera found on 50 leaf samplemilligramnnone

CODES

Variable: yearday
Description:
A 1 to 3 digit number representing the day of the year. Must be between 1 and 366 (inclusive).
Variable: plot
Code
Description
1
Hubbard Brook
2
Moosilauke
3
Russell
4
Stinson
Variable: count
Description:
An integer representing the yearly sample group.
Variable: grid letter
Description:
A valid capital letter from A-Z representing a grid
Variable: grid number
Description:
A valid number representing an existent grid. Usually in the form #.5
Variable: tree spec
Code
Description
1
Beech
2
Sugar maple
3
Striped maple
4
Viburnum
Variable: tree rep
Description:
A valid number for a tree replicate
Variable: lep species
Code
Description
2
Geometrid
3
Noctuid
4
Notodontid
5
Pyraloid, Tortricoid, Coliophorid, Psychid
6
Other species