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Catalog of Long Term Research Conducted by the Northeastern Research Station

Catalog #69

Gypsy Moth Project
To determine the relationship between white-footed mouse abundance and gypsy moth survival and density. To determine the relationship between acorn supply and white-footed mouse abundance.
expected to continue thru 1996
All plots are located on Quabbin Reservation in Franklin and Hampshire Counties, MA. where a FS research permit is renewed annually. Land is part of Boston's municipal water supply managed by Met. District Commission. Stands dominated by pole- and sawtimber-sized trees occupy 89% of the area. The remainder being stands of saplings, open fields, and wetlands. Oak types dominate the northern red oak-red maple-white pine forest land (36%); white pine(18%); pine(10%).
Acorns: 3 1-hectare plots per 8 stands (4 thinned and 4 unthinned) for a total of 24 plots. Plots are gridded with 15 m spacing between columns and rows. 
Small mammals: 3 1-hectare plots and consists of 4 consecutive nights of live trapping.
Gypsy moth larvae on 23 burlap bands in each of 4 1-hectare plots in each of 8 stands for a total of 32 plots.
Egg mass from 5 systematically designed 15m fixed radius plots in each hectare.
Two out of each group of 4 stands has received partial overstory removal (sawlog and cordwood removal). Long-term control plots had no treatments applied to them, while other plots underwent one of the following two treatments: 1) mouse removal: Mammals were caught in snap traps and removed from one plot per stand June-August 1990 only. 2) supplemental acorn feeding if acorn crops were considered too high for supplemental feeding to have an effect. Acorns added to 1 plot in edge of the 8 gypsy moth stands: ~9km per week was added starting 9 September 1992 and was continued until 158.7kg had been added to each plot.

Gypsy Moth egg mass counts taken from undisturbed forests.

All mark-recapture trapping were completed during 4 periods of 2 weeks each. Methods followed: White, G. C., D.R. Anderson, K.P. Burnham, and D.L. Otis. 1982. Capture-Recapture and Removal Methods for Sampling Closed Populations. Los Alamos National Laboratory, New Mexico. LA-8787-NERP, UC-11.

Acorns were collected in traps with 0.5m2 surface area and checked at about 2-week intervals from August to December.

Small mammal abundance; species, age, sex, reproduction condition, weight, and parasites: annually during April, June, August, October/1989-1992 starting with June 1989. Acorn production and class: estimated for 1989 through 1994. Gypsy moth data; pupal abundance is monitored: annually 1989 to present.
Ranges of each variable are visually checked line-by-line on hardcopies of every data set entered as a computer file. Temporary employees are always trained in the field by professionals.
Raw data are in ASCII (sys.dat) files in dBASE III. All cleaned raw data are on floppies and some on hard drive as permanent data files (pdf). Hardcopies of all raw data are kept in file cabinets. Analyses are generated in dBASE and sometimes SAS.
Studies of Ecosystem Processes
Model Application
each request is reviewed
Healy, W.M. 1993. Thinning oak stands to enhance acorn production (submitted to Northern Journal of Applied Forestry 1993).

Elkinton, J.S.; Gould, J.R.; Liebhold, A.M.; Smith, H.R.; Wallner, W.E. 1989. Are gypsy moth populations in North America Regulated at low density? In: Wallner, W.E.; McManus, K.A., Tech Coords. 1989. Proceedings, Lymantriidae, a comparison of features of new and old world tussock moths. U.S. Department of Agriculture Forest Service, Northeastern Forest Experiment Station Symposium. GTR NE-123. p. 233-250.

William Healy, USDA Forest Service, Holdsworth Hall, University of Massachusetts, P.O. Box 34230, Amherst MA 01003. (413) 545-0357
Joe Elkinton, Dept. of Entomology, Univ. of Mass. Amherst MA.



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