Illinois' forests in 1998.

Schmidt, Thomas L.; Hansen, Mark; Solomakos, James A.

doi:10.2737/nc-rb-198

Cited by 7 publications

(3 citation statements)

References 2 publications

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“…These 1998 ground plots formed the basis for the remeasured ground plots in the 2001 inventory. Additional information related to the procedures for the 1998 inventory can be found in Schmidt et al (2000).…”

Section: Phasementioning

confidence: 99%

“…However, for the comparison to be valid, the procedures used in the two inventories must be similar. As a result of our ongoing efforts to improve the efficiency and reliability of the inventory, several changes in procedures and definitions have been made since the last inventory of Illinois in 1998 (Schmidt et al 2000). Some of these changes make it inappropriate to directly compare portions of the 2001 data with those published for earlier inventories.…”

mentioning

confidence: 99%

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Illinois's forest resources in 2001

Leatherberry¹

2003

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BACKGROUND The North Central Research Station' s Forest Inventory and Analysis (NCFIA) program began fieldwork for the fifth forest inventory of Illinois in 2001, in partnership with the Illinois Department of Natural Resources. This inventory initiates a new annual inventory system in the State. Onefifth of the field plots in Illinois are measured each year under this system. As a result, the current inventory of the State' s forest resources will not be fully implemented until 2005. However, because each year' s sample is a systematic sample of the entire State and because timely information is needed about forest resources in Illinois, estimates have been prepared from data gathered during the first year of the inventory. Due to the limited number of field plots measured, future estimates using data from this report are subject to change when ensuing annual inventories are completed and data compiled. The results presented are estimates based on sampling techniques. As additional inventories are completed, the precision of the estimates will increase and additional data will be released.

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Section: Phasementioning

confidence: 99%

mentioning

confidence: 99%

Illinois's forest resources in 2001

Leatherberry¹

2003

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“…Several factors may be contributing to this decline, including intraguild predation and competition with coyotes and bobcats, and transmission of disease from other wildlife species (Nicholson & Hill 1984, Fedriani et al 2000, Gosselink et al 2003, Chamberlain & Leopold 2005). As Illinois' human population increases (U.S. Census Bureau 2008), land‐use changes, such as exurban development (Harden & Woolf 2005, Storm et al 2007a,b) and forest maturation (Schmidt et al 2000), may also occur and affect already declining gray fox populations. Therefore, knowledge of habitat factors that can be used to predict the relative abundance of gray foxes in Illinois is important for understanding how landscape changes may affect populations.…”

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confidence: 99%

Landscape factors affecting relative abundance of gray foxes Urocyon cinereoargenteus at large scales in Illinois, USA

2012

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Evaluation of wildlife‐habitat relationships at the landscape level provides insight into how habitat connectivity, fragmentation and land‐use changes may affect wildlife populations. Although previous studies have demonstrated that habitat composition and configuration at large scales may affect the presence, survival and movement of carnivore species, no such analyses have been conducted for the gray fox Urocyon cinereoargenteus. We used a generalized correlative mapping approach to investigate the relationship of gray fox relative abundance to landscape variables at the county scale in Illinois, USA. Relative abundance of gray foxes was high in 37 of 102 (36%) counties. Four models were competitive based on ΔAICc scores, and these models indicated that standard deviation of the perimeter‐area ratio of agricultural patches, interspersion and juxtaposition index of grassland patches, coefficent of variation of the proximity index of forest patches and relative patch richness of the landscape affected gray fox relative abundance. The variables occurring in our competing models indicate that the relative abundance of the gray fox is higher in counties containing a high level of fragmentation of preferred habitat types (i.e. forests and grasslands) and lower dispersion of less preferred habitat types (i.e. agriculture). Our results reflect gray fox habitat use at smaller scales, and at the landscape scale, gray fox abundance is influenced by how cover‐type patches are configured.

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Using Forest Service Forest Inventory and Analysis Data to Estimate Regional Oak Decline and Oak Mortality

Kromroy

Juzwik

Castillo

et al. 2008

Northern Journal of Applied Forestry

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Damage and mortality data are collected as part of the US Forest Service, Forest Inventory and Analysis (FIA) ongoing assessments of the nation's timberlands. The usefulness and value of FIA tree data in assessing historical levels of oak decline and oak mortality were investigatedfor seven Midwestern states. The data were collected during two periodic inventories conducted between the early 1970s and the mid-1990s. One-tenth to one-third of the oak trees had decline-associated damage in a given inventory, but no trends over time were apparent across the states. Thepercentages of dead trees ranged from less than 1 to 11 across all inventories and states; mortality was higher in the late inventory than the early inventory for all states. This is the first reported attempt to quantify oak decline across the Midwestern Region and it was accomplished using FIA tree data. The major concerns of the approach used are the subjective nature of the damage codes used to tabulate declining oaks and the inconsistencies and inherent subjectivities in the FIA recorded codes. The major drawback for non-FIA researchers is the time required to understand the intricacies of the FIA system.

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Illinois' forests in 1998.

Cited by 7 publications

References 2 publications

Illinois's forest resources in 2001

Illinois's forest resources in 2001

Landscape factors affecting relative abundance of gray foxes Urocyon cinereoargenteus at large scales in Illinois, USA

Using Forest Service Forest Inventory and Analysis Data to Estimate Regional Oak Decline and Oak Mortality

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