Steve Voelker @thetreecorener.bsky.social · 9hHere is the location of Schlatter Lake, from a NOAA navigation chart I have hanging in the lab. 020
Steve Voelker @thetreecorener.bsky.social · 9hFound some white pine x-sections collected 4 yrs ago hiding with the white cedars. Measured this one today as a treat. It is from the tip of the Keweenaw Peninsula (Schlatter Lake) and dated strongly from 1524 to 1710 CE ; r = 0.5 w/ master chronology. 180
Steve Voelker @thetreecorener.bsky.social · 06/10/2026I cut this black locust last year and treated the stump and it still sprouted. Most sprouts were within 20 ft but one popped up at least 45 ft away (straight line) but the root also had to either go through or another 20 ft up and over an old pile of mine rocks. 111
Steve Voelker @thetreecorener.bsky.social · 05/10/2026Peak fall color is happening in the UP right now -- maybe a week early from what would be expected. We had some frosty nights two weeks ago which probably sped things up. 0211
Steve Voelker @thetreecorener.bsky.social · 28/09/2026Here are some freshwater jellyfish we captured at the UP lake were we have a cabin. We put them in a big glass pitcher to have a closer look. The finger poking them is my 9yo daughter. Here is more about them: www.sciencefriday.com/segments/fre... 0142
Steve Voelker @thetreecorener.bsky.social · 14/09/2026Went to the Lake Superior [Keweenaw] shoreline during the second day of a gale. There were a dozen or so surfers combined at two stops, which is about a dozen more than usual. 1141
Steve Voelker @thetreecorener.bsky.social · 09/09/2026Say you own 40 acres of conifer peatland in NE Wisconsin, what are you gonna do with it? I am betting it is not whatever this is. FYI I was actually doing research trying to re-locate white pine stands measured ~100 yrs ago before this distracted me for the past 15 mins. 1162
Steve Voelker @thetreecorener.bsky.social · 04/09/2026Doing some archive work and came across our smallest "sunken log" sample. It dates from 1514 to 1729. It had an avg ring-width of 0.42 mm. I am certain it is an old branch given the extensive compressionwood. The wood barely floats indicating it has a density approaching 1 gm/cm3. 180
Steve Voelker @thetreecorener.bsky.social · 24/08/2026To make room in the lab this summer I brought home ~2 cubic yards of sunken white pine log "extra pieces" to burn this winter. These trees started growing, on average, around 1550, so it is a shame to release this carbon. But these were only small samples of the whole logs still in the lakes. 040
Steve Voelker @thetreecorener.bsky.social · 24/08/2026No cheating. Share the past photo of the sky in your camera roll. This is the last pic of the sky that doesn't feature my daughter or family. A couple weeks ago in Sylvania Wilderness. 351
Steve Voelker @thetreecorener.bsky.social · 17/08/2026This past year 80 acres was donated to our college. It is in one of the more remote areas of the UP and requires a steep 1.5 mile hike to get up to it. Initial visit exceeded expectations: Many old trees with no apparent history of logging -- and a beautiful pond rimmed by bedrock and bogs. 5470
Steve Voelker @thetreecorener.bsky.social · 11/08/2026This cedar 1×12 with ~300 rings caught my eye on this #Tree-ringTuesday. I'm in the middle of replacing rotten railings and adding a roof to this back deck & soon to be clubhouse for the 9yo. 081
Steve Voelker @thetreecorener.bsky.social · 05/08/2026Today I walked around an old dune and swale complex near Lake Superior. These are fairly common along the south shore, but this is a REALLY long one, stretching out in arcs that span 2 miles. There were no bugs and the blueberries were ripe and in endless supply on the old dunes. A fine day. 1381
Steve Voelker @thetreecorener.bsky.social · 23/07/2026Yesterday I stopped by a remote reservoir. It is 1200 acres and does not have a single dwelling on the entire shore. There were many intact white pine stumps with 3-5' diameters along the shore. Here is just one primary root that someone cut off for a bonfire years ago. It has about 300 rings. 140
Steve Voelker @thetreecorener.bsky.social · 20/07/2026Went down a rabbit hole on FB marketplace. I searched "Barn Beams" and made a list of >100 unique locations in WI and another 40 in MI trying to sell beams from mostly 1800's dismantled barns. It seems this could be interesting sociological info and also represent untapped dendro resources... 1140
Steve Voelker @thetreecorener.bsky.social · 15/07/2026Historic travel corridor, in this case, was the overland trail between what is modern Marquette and L'anse. The rugged geography of the Huron Mts to the north pushes East/West overland travel into a narrow area. 160
Steve Voelker @thetreecorener.bsky.social · 15/07/2026It was >95 degrees today but I had some time to check out a red pine site along a historic travel corridor I have wanted to stop at for the past year. It did not disappoint; pictured below is another culturally modified tree -- used for resin harvesting. Only the 4th we have found in the UP. 3282
Steve Voelker @thetreecorener.bsky.social · 30/06/2026Two ash trees below our house tonight offer a lesson in resistance. Almost all ash died in this area from emerald ash borer but these survived. One is survives only via epicormic sprouts while the other has a fully intact canopy. Hoping they can confer a bit of resistance to the next generation. 050
Steve Voelker @thetreecorener.bsky.social · 29/06/2026Some MTU students in action collecting fire history data in the UP from our most recent data collection trip. 080
Steve Voelker @thetreecorener.bsky.social · 18/06/2026The field sites for coastal pine research in the UP are up there with the best of possible research locations. 2110
Steve Voelker @thetreecorener.bsky.social · 15/06/2026Stopped by our cabin for an evening and got some kayak fishing time in. Lots of takers of all species and sizes on just one spinner buzzed over the emerging large-leafed pondweed (Potamogeton amplexifolius). Here are just two largemouth bass. The bass were not spawning yet but will be soon. 050
Steve Voelker @thetreecorener.bsky.social · 07/06/2026Went for a walk along a really rugged part of the UP woods last week and found some cool trees and plants. I also found yet another an unmarked vertical mineshaft that I managed not to fall down. Those things are all over the rocky parts of the UP. 1130
Steve Voelker @thetreecorener.bsky.social · 21/05/2026Me, two weeks into a summer of fire scar data collection... 0130
Steve Voelker @thetreecorener.bsky.social · 15/05/2026After a record or near record for precip over the past winter shallow groundwater levels are very high in the UP (and probably northern lower MI), continuing the 10-15 yr pluvial across the region. These flooded "ghost trees" are not from beaver activity, just groundwater fluctuation. 0110
Steve Voelker @thetreecorener.bsky.social · 09/05/2026MS student Isabella Stone and I went scouting a beautiful coastal red pine site today. After meeting with one of the private landowners we now have access to sample all ~200 acres. Here is a "peel scar" on a snag from indigenous resin harvesting practices. 2200
Steve Voelker @thetreecorener.bsky.social · 08/05/2026My favorite local copse of paper birch in the late afternoon today. All the trees in the foreground are growing out of mine rock but the birch trees would not have been in this location without that intense disturbance many decades ago. 060
Steve Voelker @thetreecorener.bsky.social · 06/05/2026Pulled out the main saws for collecting red pine fire history samples. They are all purring like kittens and ready for me to teach chainsaw safety to a crew of four next week. The big saw is nearly brand new and the oldest saw I have had since 2011 or so when I used it on redwood sections. 090
Steve Voelker @thetreecorener.bsky.social · 04/05/2026The phenology is late here because we have had a Houghton record 360" of snow this winter. The first of the forest-origin trout lilies in this area popped open this weekend. We found this one after going to a known population with a southern aspect and scanning thousands of individuals. 0151
Steve Voelker @thetreecorener.bsky.social · 01/05/2026Our research on submerged pine logs in the UP includes a story connecting forest demography to historic fire and Indigenous use/mgt (more later). As such I have been mapping historic Indigenous settlements, trails and river travel corridors from multiple sources to understand where people were. 1229
Steve Voelker @thetreecorener.bsky.social · 22/04/2026Here is an example red pine x-section we collected last fall. We should be dating these fire scars within the week and collecting a few hundred more samples over the summer. I just gotta grade 70 more final exams... 0111
Steve Voelker @thetreecorener.bsky.social · 22/04/2026In shady areas we have had 4 months of continuous snow cover. Today I took 4 representative pics under a northern white cedar canopy on the edge of the melting snow approximating litterfall from Dec - April. Life can be rough in the winter for these trees. 030
Steve Voelker @thetreecorener.bsky.social · 15/04/2026Yesterday after I entreated students to fill out instructor evaluation surveys I sat down in the front of the class for a student presentation and my chair broke off completely. Yes, I went awkwardly sprawling and there was much laughter. Not sure if my unintentional comedy will earn higher marks. 020
Steve Voelker @thetreecorener.bsky.social · 13/04/2026It finally felt like spring today and then ~1000 pounds of ice and snow fell off the roof and dented the steel basement door on the right. The work clearing snow and ice is now well into its 5th month here. 160
Steve Voelker @thetreecorener.bsky.social · 26/03/2026My first PhD student, Victor Humanes Fuente, will defend his PhD next week Wednesday on the following topics: 1) L Superior lake-effect isoscapes 2) Connecting 800 yrs of pine establishment to fire and indigenous migrations along the shore of L Superior 3) A >500 yr L Superior temp reconstruction 180
Steve Voelker @thetreecorener.bsky.social · 24/03/2026Bobcat track in fresh snow from this morning. The rabbits and chipmunks are increasingly active aboveground so I imagine the leanest days of winter are now over for whomever left this. 060
Steve Voelker @thetreecorener.bsky.social · 04/03/2026Makes me think about this Powerpoint slide from ~seven years ago that I have used in multiple presentations but needs to be updated for climate disasters. 094
Steve Voelker @thetreecorener.bsky.social · 24/02/2026I never took courses in climate science, paleoclimate, geology, etc. So, there is a lot I don't know. Does anyone know why some geoscientists plot their temporal data backwards from conventional left being further back in time? I never know how to explain this to students. 210
Steve Voelker @thetreecorener.bsky.social · 23/02/2026Here is the current snow level in Houghton in our back yard -- to the top of a four ft fence that is supposed to keep our dog in the yard. 040
Steve Voelker @thetreecorener.bsky.social · 13/02/2026Ooh, this is very tempting for a dendrochronologist. A big stack of old growth white pine wood only 15 minutes away. 1150
Steve Voelker @thetreecorener.bsky.social · 13/02/2026IDK, maybe you need some minks right now? As seen at our cabin in the UP of Michigan last July 4th. 1312
Steve Voelker @thetreecorener.bsky.social · 09/02/2026Students successfully completed the Dice Degrees Challenge this morning within a 50 minute class. They had fun and I think this will help them better understand lecture materials where we look at a lot of time-series data for understanding evidence of climate change. 150
Steve Voelker @thetreecorener.bsky.social · 06/02/2026Prepping an intro to climate change exercise for Monday where groups of students will be creating 5 synthetic temperature time series based on the # of sides of the dice being scaled to atmospheric CO2 concentrations from 1900 to 2026. 171
Steve Voelker @thetreecorener.bsky.social · 04/02/2026For this #TreeRingTuesday that I got to visit Santa Cruz Island in 2014: This island is off the coast of Southern CA. I led tree-coring efforts to understand forest mortality patterns. The island is home to dwarf foxes that are not afraid of people. Really cool place I was lucky to visit. 1130
Steve Voelker @thetreecorener.bsky.social · 20/01/2026Last October, on a hunch I checked out this undeveloped lake on industrial timberland in the UP. It is mostly surrounded by ~200 to >250 year old white pines and hemlocks. There were many ducks, fish and a pair of swans that day. The foresters/loggers have been keeping this one a secret. 190
Steve Voelker @thetreecorener.bsky.social · 14/01/2026At a local arts and crafts fair before Xmas I saw this bowl and immediately grabbed it and looked over my shoulder in case Frank Costanza was about to rain blows down upon me. For this #Tree-RingTuesday here is a sugar maple bowl that has over 125 tree-rings. 0100
Steve Voelker @thetreecorener.bsky.social · 03/01/2026Finally, Just have to share this image. It is the last page of a 1947 USFS pub on pole blight. research.fs.usda.gov/treesearch/4... 2152
Steve Voelker @thetreecorener.bsky.social · 19/12/2025Still have the shirt from the 2002 North Central Forest Pest workshop. In MO, the program focused on red oak borer and armillaria. But what I remember most is the first report of Emerald Ash Borer spreading outside Detroit and how a pall swept over the conference. 180
Steve Voelker @thetreecorener.bsky.social · 16/12/2025We need some more tree-posting on this app. This is the oldest known living Douglas-fir in Oregon (and maybe in North America?) I cored it to near the pith in 2006 and was able to re-visit it recently with some other forest scientists. It is at least 1015 years old, but probably ~1050. 1014824
Steve Voelker @thetreecorener.bsky.social · 04/12/2025Found this petrified wood on a gravel bar in western Oregon while on a canoe trip years ago. Not the most beautiful specimin but it has about 200 annual tree rings visible after I had it sliced in half. Most wood from OR dates to 20-40 MYA so it is the oldest wood I keep in my office on display. 0132
Steve Voelker @thetreecorener.bsky.social · 03/12/2025Action shot of a pine grosbeak from when I arrived at work this morning. Took this with my phone just a few feet away -- birds don't usually cooperate so well. 190