Lidar (Light Detection and Ranging), a remote sensing tool that uses pulses of light to measure the elevation of reflecting surfaces, was used to acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments, and hydrologic modeling. LAS and bare earth DEM data product s are suitable for 1 foot contour generation.
Discrete return lidar data were collected during leaf-off conditions in the spring of 2015 as part of the Michigan Statewide Authoritative Imagery & Lidar (MiSAIL) program. The Sanborn Map Company was tasked by the State of Michigan to deliver high point density returns with Nominal Point Spacing of 0.71 m. Data were collected using a Leica ALS80 sensor flown on board an aircraft at an altitude of approximately 1200 m with a maximum scan angle of 32 degrees. Lidar acquisition was in compliance with Quality Level 2 of the United States Geologic Survey (USGS) National Geospatial Program (NGP) Base Lidar Specifications ; horizontal accuracy of non-vegetation returns were better than 1 m and vertical accuracy of non-vegetation returns was 0.029 m. The lidar output standard for MiSAIL is a one meter Digital Terrain Model (DTM) which would leave relevant microtopograpic features unidentifiable. We found that, in fact, the resulting lidar data were suitable for generation of 1 foot contours (0.305 meter) (which we acquired as an LAS Dataset which is the industry-standard binary format for storing airborne lidar data).
Data Access: https://umich.box.com/v/UMBS2015LiDAR (data file storage constraints within UMBS Research Gateway necessitate use of cloud storage)
These 3 parcels within the Osborne Preserve are designated Michigan Environmental Areas. Certain disruptive uses in these areas are prohibited without permission of the Michigan Department of Environmental Quality. This data was digitized from UMBS paper records. For more information, please visit http://www.michigan.gov/deq/0,4561,7-135-3313_3677_3700-10863--,00.html
Here's all the spatial information collected so far about major land uses and modifications on UMBS property after the logging era. Data is drawn from personal interviews and UMBS historical records. A separate file is provided for the Osborne Preserve property on Sugar Island.
Roads, trails, two-tracks, abandoned roads, and other tracks on or near UMBS property. Aggregated from station records, imagery-based digitization, GPS collection, and the Michigan Geographic Data Library.
Separate files are provided for UMBS's lower peninsula and Sugar Island properties.
Outlines of the wildfires that have been documented on UMBS property, derived from GPS-mapping old firebreak plow lines or by digitizing information from Marilyn Williamson's 1970 landcover map. Little is known about the fire severity. While mapping the fires outlined with plow lines, I only saw any evidence of fire at the site lying close by the maple river, where a few burned pine trunks stood-- these may have been killed by the fire or could have been standing dead at the time. The 1953 fire fell within the long-term aspen bird plot, and a student description from that year tells us that the understory was completely removed (except bracken fern, which quickly reappeared), but trees were unharmed.
Although we are aware that most of the property burned one or more times after the logging era, we have little specific information about that period.
In 1938, 6 0.1 acre tree census plots were established on the UMBS property. In these "50 Year" plots, all trees were given ID tags, and had DBH censuses conducted at irregular intervals through 2001. In Plot 6, information about shrub count and size was also collected.
Art Cooper (1969-1998) and Mark Roberts (2008) each established several plots designed to replicate 50 Year Plot #2. In these (along with Plot #2), DBH inventories and sapling counts were conducted without respect to tree ID tags. In the Mark Roberts plots and 50 Year Plot 2, species-wise counts of standing dead trees were also conducted.
The included .zip file has a shapefile with the locations of each plot.
This dataset will need to be updated as additional M. Roberts and A. Cooper plot spreadsheets are digitized.
These long-term plots were first sampled in the 1930's or 1940's. Sampling generally consists of dbh and/or height censuses. Although many trees were given identifier tags when the plot was established, many of those tags have been lost.
Plots fall into several groups:
The BS32 plots, placed in mixed swamp conifers, study growth rates of young trees.
The BS34 plots test the effect of thinning on residual tree growth (A) in mixed hardwoods, with plot B acting as a control.
The BS40 plots (E=.2 acres, F=.45 acres) observe the growth rate of trees in a red pine stand which was pruned in 1940.
The BS42 plots, placed in a red pine-dominated forest, compares the growth of conifers in a 1 acre plot (B) where trees were pruned and competing aspens and birches were cut, with 0.5 acre control plots (A, C) that lie adjacent on B's east and west sides.
The BS46 plot measures the height and DBH of planted red, jack, and scotch pine in a plantation along Greenstar road.
To add: BS40A (hemlock plot, digital but not yet public), BS40B.
Long term study plots which track DBH (and in some cases, height) of tagged trees through time under a variety of treatments/no treatments. Trees recruited after the plot was established may or may not have been tagged.