Search found 33 matches

by gjschmidt
Fri Feb 16, 2018 11:28 am
Forum: Michigan
Topic: Russ Forest Lidar
Replies: 28
Views: 5157

Re: Russ Forest Lidar

Here are some LIDAR maps and cross section...
by gjschmidt
Fri Feb 16, 2018 11:18 am
Forum: Michigan
Topic: Russ Forest Lidar
Replies: 28
Views: 5157

Russ Forest Lidar

I visited Russ Forest Park in Cass County, MI in 2012 and saw the remnants of a tuliptree (Liriodendron tulipifera) allegedly 60 m (200 ft) tall. The log on display was not convincing, and I was unable to find any trees that came close to that size. This was before I had a laser rangefinder. I found...
by gjschmidt
Tue Dec 06, 2016 8:45 am
Forum: Weather and Climate
Topic: Climate constraints on maximum tree height
Replies: 2
Views: 1052

Re: Climate constraints on maximum tree height

I have strong doubts on Baffin Island and Nome, Alaska having 50 m trees, LOL.
by gjschmidt
Mon Dec 05, 2016 10:32 am
Forum: Weather and Climate
Topic: Climate constraints on maximum tree height
Replies: 2
Views: 1052

Climate constraints on maximum tree height

This paper analyzes correlation among different functional traits and climate, including maximum tree height. I have not uncovered where they get the maximum height by species, and I question the taxonomic accuracy of their source for geographic distribution data in GBIF. It also doesn’t seem to add...
by gjschmidt
Wed Jun 29, 2016 10:17 pm
Forum: Michigan
Topic: Michigan datbases entries
Replies: 4
Views: 1431

Re: Michigan datbases entries

I have a Nikon Forestry PRO Laser Rangefinder/Hypsometer. http://www.forestry-suppliers.com/product_pages/Products.asp?mi=78521&title=Nikon%AE+Forestry+PRO+Laser+Rangefinder%2FHypsometer&itemnum=91140 As far as girth goes, d-tapes measure circumference regardless of which side of the tape used. Diam...
by gjschmidt
Fri Jun 17, 2016 8:29 am
Forum: Michigan
Topic: Michigan datbases entries
Replies: 4
Views: 1431

Michigan datbases entries

I recently visited Fabius State Game Area in St. Joseph County. Though many of the game areas are fairly cut up and invaded by multiflora rose and garlic mustard, there are a few nice stands. One such stand includes a tuliptree that I initially measured at 39.0 m tall with my laser hypsometer. But e...
by gjschmidt
Sun Nov 01, 2015 5:13 pm
Forum: Michigan
Topic: Blandford Nature Center - Grand Rapids, MI
Replies: 1
Views: 1052

Blandford Nature Center - Grand Rapids, MI

Today, my son and I rode our bikes to the Blandford Nature Center on the west side of Grand Rapids, armed with a DBH tape and a Nikon laser rangefinder. I have been curious about the baseline height of forest canopy around the city of Grand Rapids, and the height of the apparent tallest trees. Along...
by gjschmidt
Thu Oct 22, 2015 5:55 pm
Forum: Special Publications
Topic: 3-Point Derivation of Dominant Tree Height Equations
Replies: 2
Views: 3383

Re: 3-Point Derivation of Dominant Tree Height Equations

I have just seen this paper. Do you think that your new equations will change how forest growth is simulated by the Forest Service? Will there be an update to the site index curves? I also wonder whether there shouldn't be two parameters for "site index" rather than one (one for initial growth rate ...
by gjschmidt
Fri Mar 27, 2015 6:07 pm
Forum: General Discussions
Topic: Tree species size distribution of temperate vs. tropical
Replies: 16
Views: 4827

Re: Tree species size distribution of temperate vs. tropical

I've finally finished my tree diversity maps using BONAP data. I have two size classes: small trees and medium to large trees. In these maps it is apparent that the most tree diversity on a per unit land area is in Alabama and the Florida panhandle. But in terms of small trees, tropical Florida take...
by gjschmidt
Mon Feb 09, 2015 9:41 pm
Forum: General Discussions
Topic: Tree species size distribution of temperate vs. tropical
Replies: 16
Views: 4827

Re: Tree species size distribution of temperate vs. tropical

These numbers almost seem random (scarlet oak if its dry habitat is any clue should not even rank near the top among oaks). The "typical" height range usually is a little more consistent with the rank of the stature, but even these have probably lost their connection with reality, as button bush is ...

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