| Title: |
IPS - Intensive Plot System
|
| Objective: |
To describe gypsy moth population dynamics in different habitat
types. |
| Year Established: |
1971 |
| Year Completed: |
1978 |
| Site Description: |
NY:Whitehall, Lake George area.
NY:Cobleskill
MA:Harwich, Hawkness State Forest, Cape Cod.
MA: Ludlow, Ludlow Reservoir.
NJ:Clinton.
NJ:New Lisbon, Lebanon State Forest.
Locations were in woodlands that contain extensive acreages
of varying mixtures of host and non-host tree species. Areas
chosen all had potentially defoliating populations at the beginning
of the study. Areas chosen have a network of roads to permit
access to the sites. Sites are relatively homogeneous with respect
to soil, soil moisture conditions, and plant cover. Less than
50' elevation difference exists within a site. |
| Statistical Design: |
Six 12-hectare study areas, each divided into six 2-hectare
sites with five 0.5-acre plots in each site; actual number of
sites per area varied from 5 to 8. Design and selection of study
areas per plot by Robert Campbell. |
| Likelihood of Locating Study Areas: |
111% |
| Experimental Treatments: |
None besides natural defoliation from gypsy moths. |
| Sampling Methods: |
Visual determinations were made of egg masses each winter
and percent defoliation the following summer. |
| Variables and Sampling Frequency: |
Dependent: Defoliation, diameter, dominance & condition
of trees in plots. Gypsy Moth egg mass and locations. |
| QA/QC Practices: |
Each plot was marked with a metal stake, maps exist of some
plot locations. Numerous subsets of the IES data were produced;
the 9-track tape at Hamden has documentation attesting to its
reliability and that it is the "best" version; however, it does
not contain all the variables measured in the IES plots. |
| Data Storage: |
Three file cabinets at Ansonia, CT. contain hardcopy of original
tally sheets and summary statistics. One 9-track tape in Hamden,
CT. contains corrected, verified egg mass, defoliation, tree
health, and site variables. One 9-track tape and 1 diskette
in Morgantown, WV. (M.J. Twery) contains tree condition and
egg mass counts for the Ticonderoga, Dresden, and Whitehall,
NY areas. |
| Global Change Research Applications: |
Studies of Ecosystem Processes Model Development and Application |
| Data Availability: |
partially 1994 |
| Publications and Reports: |
Campbell, R.; Sloan, R.J. 1978. Natural maintenance and decline
of Gypsy Moth outbreaks. Environmental Entomology, June 1978.
7(3): 389-395.
R.C. Rearden. 1976. Parasite incidence and ecological relationships
in field populations of Gypsy Moth larvae and pupae. Environmental
Entomology, October 1976. 5(5): 981-987.
M. Montgomery. 1990. Chapter 7 - role of site and insect
variables in forecasting defoliation by the Gypsy Moth. In:
Watt, A.D.; Leather, S.R.; Hunter, M.D.; Kidd, N.A.C., eds.
Population dynamics of forest insects. Intercept, Ltd. 73-84.
|
| Contact: |
Mike Montgomery, USDA Forest Service, 51 Mill Pond Rd., Hamden
CT 06514. (203) 230-4331 |
| Cooperation: |
Numerous cooperators existed during active data collection
years. |
