Temperate broadleaf and mixed forests Central latitude
: 46.920000Central longitude
7 years, from 1962 to 2009
12 distinct species
Across the time series Tsuga canadensis
is the most frequently occurring species
Woods, K. D. (2014) Multi-decade biomass dynamics in an old-growth hemlock-northern hardwood forest, Michigan, USA. PeerJ, 2, e598.
Data set is repeated censuses of trees on nineteen 0.2-acre circular permanent plots in old-growth hemlock-northernhardwood forests in the Huron Mts. in northern Marquette Co., MI. Plots are located within a large private reserve,including about 4000 ha of never-logged, old-growth forest. Plots were first censused in 1962 and recensused in 1967by Eric Bourdo (Michigan Technological University), with additional full censuses in 1989, 1994, 1999, 2004, 2009 by Kerry D. Woods (Bennington College). Stems measured in 1962-1967 were labelled and, beginning in 1989, all stemswere mapped, allowing tracking of individual stems throughout the entire study period. 1962-1967 measurementsincluded all stems greater than 5 in/12.7 cm diameter at breast height (dbh); from 1989 onward, stems > 5 cm dbh weremapped over entire plots, and stems > 1 cm dbh (tree species only) within a circular central sub-plot 8 m in diameter.This project was supported by the Huron Mountain Wildlife Foundation, the Andrew Mellon Foundation, and theNational Science Foundation Temporal extent: 1962-2009; censuses in 1962, 1967, 1989, 1994, 1999, 2004, 2009 Spatial extent: 19 plots of0.2 acre/805 square m area distributed over old-growth mesic forests within Huron Mountains, northernMarquette Co., MI. Taxonomic extent: All species of trees present in study plots. Full list: Abies balsamea, Acerrubrum, Acer saccharum, Betula alleghaniensis, Fraxinus nigra, Ostrya virginiana, Pinus strobus, Populusgrandidentata, Quercus rubra, Tilia americana, Tsuga canadensis, Ulmus americanaSampling Description: For 1962-1967, all stems > 5 in (12.7 cm) diameter at breast height (dbh) were tallied by species and dbh. Stems were labeled with painted numbers. From 1989 forward all stems were mapped on polar coordinates,stems > 5 cm dbh tallied by species and dbh throughout each plot, and stems > 1 cm mapped and measuredfor a central sub-plot of 8 m radius. Individual trees are indicated as dead ('first_dead' code = 1) in the firstcensus after death and were not measured subsequently.