Todd F. Hutchinson

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This study quantified relationships of understory vascular plant species composition and richness along environmental gradients over a broad spatial scale in second-growth oak forests in eastern North America. Species frequencies were recorded in 108 25 × 25 m plots in four study sites extending over 70 km in southern Ohio, U.S.A.. The plots were stratified(More)
A soil fertility gradient, ranging from infertile to highly fertile soils, may define whether or not a plant will establish and spread at a site. We evaluated whether or not such a fertility gradient exists for Rosa multiflora Thunb., a nonnative invasive shrub, and Kalmia latifolia L., a native problem shrub, in closed-canopy forests of the eastern U.S. We(More)
This study describes the results of the application of a single dormant season prescribed fire to two southern Ohio forest sites for the purposes of restoring the ecosystem functional properties that existed in these sites prior to major human intervention (clearcutting, fire suppression, and atmospheric deposition). Each forest site was composed of three(More)
At the onset of Euro-American settlement (ca 1820), the landscape of Illinois was a diverse mixture of prairie (55% of the land) and forest, woodland, and savanna (42% of the land). Wetlands, including large expanses of wet prairies and marshes, occupied 24% of the state. However, with the advent of plowing and draining technologies in the mid-1800s, the(More)
Botanists and ecologists have long been intrigued by ecosystem convergence, where similar ecosystems have developed in regions that are widely disjunct but that share a similar climate and landform. When I was introduced to the concept of ecosystem convergence in college, the Mediterranean-type climate regions (MTC) were used to illustrate the phenomenon.(More)
Mesophytic species (esp. Acer rubrum) are increasingly replacing oaks (Quercus spp.) in fire-suppressed, deciduous oak-hickory forests of the eastern US. A pivotal hypothesis is that fuel beds derived from mesophytic litter are less likely than beds derived from oak litter to carry a fire and, if they do, are more likely to burn at lower intensities.(More)
It is well known that the line integral, describing Faraday rotation in an optical medium, reduces to zero at low frequencies for a closed path that does not encircle a current source. If the closed optical path possesses linear birefringence in addition to Faraday rotation, the cumulative effects on the state of polarization result in a response to(More)
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