Data Package Metadata   View Summary

Plot establishment (modified from unpublished 2008 report by Dennis A. Riege to the Huron Mt. Wildlife Foundation):

Permanent plots archived here are in late-successional mesic forests of the Huron Mountain Reserve, in stands with significant representation of white pine (Pinus strobus), which occurs primarily as as emergent trees above a closed canopy dominated by hemlock and sugar maple. During 2007, Dennis Riege established a large (1.5 ha) permanent plot (Fisher Creek 1: FC1). Data for this plot are in separate tables for the north and south portions of the plot.

In 2008, Riege established a second 1.04 ha permanent plot (Fisher Creek 2: FC2) adjacent to FC1 in a sugar

maple-hemlock stand with emergent white pine. Several canopy gaps were present at the time of plot establishment.

A third 0.59-ha permanent plot (Ives Lake 1: IL1) was located on a hillside on the shore of Ives Lake, in a mid-successional stand with greater pine dominance and existing regeneration of white pine. In contrast to the Fisher Creek plots, IL1 is a more recently-disturbed site with nonnative species in the groundlayer.

An additional plot listed here (Trout Mountain) is one of several 20x50 m (0.1 ha) plots estabilished in 2006 (the other 0.1 ha plots are completely within FC1 and FC2, and are not archived separately).

Measurement methods:

Stems >5 cm diameter at breast height (DBH) (>1 cm DBH for Trout Mountain plot) were measured and mapped on a grid of perpendicular grid-lines. PVC stakes placed at <50 m intervals along grid-lines were used to anchor tapes for mapping. All stems were remeasured in 2011, 2016, and 2021-22. At each remeasurement, stems dead since previous measurement were noted, and new recruits >5cm DBH measured and mapped.

Logs on forest floor -- 'dead-and-down' stems -- >15 cm diameter were mapped, measured (diameter estimated to nearest 5 cm) at plot establishment, and assigned to decay classes (Class 1 = bark intact, twigs present, elevated on support points: Class 2 = bark intact, twigs absent sagging slightly on support points: Class 3 = trace of bark, breaking into large hard pieces, sagging near ground: Class 4 = bark absent, broken into small soft pieces, losing round shape: Class 5 = texture soft and powdery, oval shape.). Down logs, with diameter and decays class, are shown on maps in pdf document included with this package. Stem and log maps included in this package are for initial measurements of plots: 2006 for Trout Mt.; 2007 for Fisher Creek 1; and 2008 for all others.

Geographical coordinates:

Coordinates (taken by GPS) of 'anchor points' and orientations of each plots are as follows:

Fisher Creek one N:

GPS of coordinates 70, 230 = 46 51.584N, 87 52.940W

GPS of coordinates 20, 230= 46 51.575N, 87 52.980W

y-coordinate grid-lines are oriented magnetic N-S

Fisher Creek one S:

GPS of coordinates 62, 80 = 46 51.514N, 87 52.952W

GPS of coordinates 62, 0= 46 51.462N, 87 52.942W

y-coordinate grid-lines are oriented (magnetic) N-S

Fisher Creek two:

GPS of coordinates 90, 0 = 46 51.584N, 87 52.940W

GPS of coordinates 40,116= 46 51.645N, 87 52.985W

y-coordinate grid-lines are oriented (magnetic) N-S

Ives Lake:

GPS of coordinates 28, 0 = 46 50.664N, 87 51.243W, accuracy 8 m.

vertical lines (y-axis) on map run 15 degress west of magnetic north

Trout Mountain:

GPS of coordinates 0, 0 = 46 51.714N, 87 53.123W

vertical lines (y-axis) on map = 30 degrees west of magnetic north