Wisconsin's 1968 timber resource--a perspective

Spencer, John S.; Thorne, Harry W.

doi:10.5962/bhl.title.81335

Cited by 10 publications

(5 citation statements)

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“…The tree inventory data for Wisconsin and Michigan were summarized as basal area estimates compiled from tree detail records ofBitterlich samples (Bitterlich 194 7) collected in the United States Forest Service Continuous Forest Inventory (Chase et al 1970, Spencer and Thome 1972, Delcourt et al 1984. Subsets of moderatesized lakes (30-150 ha area with maximum depth >6 m) were distinguished for the data from WI-UM and LM, and 66 small-sized lakes ( <9 ha) formed a subset of the WI-UM data.…”

Section: Pollen and Tree-inventory Datamentioning

confidence: 99%

“…The mean radius for the lakes in the former data set was 300 m, which is only slightly less than the mean radius of 450 m in the subset of moderate-sized lakes in WI-UM. The tree inventory data for Wisconsin and Michigan were summarized as basal area estimates compiled from tree detail records ofBitterlich samples (Bitterlich 194 7) collected in the United States Forest Service Continuous Forest Inventory (Chase et al 1970, Spencer and Thome 1972, Delcourt et al 1984. All Bitterlich samples within each township were averaged to give I basal area sample/100 km 2 • Experiments with these data showed that sampling areas of 1500-3000 km 2 around each pollen site were required to give estimates that were insensitive to small changes in sampling area, of the percent basal area of the trees around each site.…”

Section: Pollen and Tree-inventory Datamentioning

confidence: 99%

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Relationships between Contemporary Pollen and Vegetation Data from Wisconsin and Michigan, USA

Bradshaw¹,

Webb²

1985

Ecology

257

143

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Scatter diagrams and regression analysis of paired pollen and tree-inventory data show how P<;»llen ~rcentages represent the percent basal area for the major arboreal genera in Michigan and Wisco~si.n. We show that the relationship between pollen and tree percentages for each taxon is generally simliar ~or t~o ~~tes of comparable ~ize and similar vegetation (Wisconsin and Michigan), but that the relatiOnship IS mfiuenced by the size of the pollen-collecting site and the size of the area surveyed for trees around each site. These results provide information concerning the relative size of the pollen~sour~e area for.seven arboreal pollen types: Pinus, Quercus, Betula, Tsuga, Ulmus, Fagus, ~d~cer, hsted I~ ~escendmg order of pollen-source area. Moderate-sized lakes (30-150 ha) accumulate signi~cant quantities of ~inus and Quercus pollen produced farther than 30 km away, but accumulate relatively few Fagus grams from >4.5 km, and even fewer Acer grains from >2.3 km. The source areas for. Betula, Tsuga, and Ulmus pollen lie within 30 km of each lake, and significant quantities of these grams t~avel farther tha~ 4.5 km. Re~ession analysis of data from basins of different size supports the hypothesis that small basms collect their pollen from a smaller area of the surrounding vegetation than do large basins.

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Section: Pollen and Tree-inventory Datamentioning

confidence: 99%

Section: Pollen and Tree-inventory Datamentioning

confidence: 99%

Relationships between Contemporary Pollen and Vegetation Data from Wisconsin and Michigan, USA

Bradshaw¹,

Webb²

1985

Ecology

257

143

View full text Add to dashboard Cite

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“…Periodic inventories were conducted roughly every 10 to 20 years. These inventories were completed in 1936 (Cunningham and Moser 1938), 1956(Stone and Thorne 1961, 1968 (Spencer and Thorne 1972), and 1996(Schmidt 1998.…”

Section: What Is This Reportmentioning

confidence: 99%

Wisconsin Forests 2019

Kurtz

Anderson²,

Butler

et al. 2023

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This summary report provides results of the ninth forest inventory of the forests of Wisconsin conducted by the USDA Forest Service, Forest Inventory and Analysis program. There are an estimated 17 million acres of forest land across the State which is a small decrease from the 2014 estimate. There are 11.5 billion live trees at least 1 inch diameter at breast height (d.b.h.)/diameter at root collar (d.r.c.) on this forest land. Growing-stock volume on timberland totaled 22.4 billion cubic feet, led by sugar maple and red maple with 2.5 billion cubic feet and 2.3 billion cubic feet, respectively. By forest type, white oak/red oak/hickory is the most abundant at 4.1 billion cubic feet with the next most common forest type being sugar maple/beech/yellow birch at 3.5 billion cubic feet. The full, interactive report is available at https://doi.org/10.2737/NRS-RB-127-INT .

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“…Forest inventories of Wisconsin were completed several times over the past century: 1936 (Cunningham and Moser 1938;Cunningham et al 1939), 1956(Stone and Thorne 1961), 1968(Spencer and Thorne 1972), 1983(Spencer et al 1988), 1996(Schmidt 1998Kotar et al 1999), andin 2004. Data from new inventories often are compared with data from earlier inventories to determine trends in forest resources.…”

Section: It Ain't What You Don't Know That Gets You Into Trouble It's What You Know For Sure That Just Ain't So -Mark Twainmentioning

confidence: 99%