Ohio Journal of Science: Volume 109, Issue 3 (June, 2009)

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https://kb.osu.edu/handle/1811/52098

Front Matter
pp. 0
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Ohio's Academic Goals Humbled - Opinion
Geis, Philip A. pp. 42
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Impact of Lonicera maackii on Decomposition Rates of Native Leaf Litter in a Southwestern Ohio Woodland
Blair, Brent C.; Stowasser, Annette pp. 43-47
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Aesthete Canals in the Chiton Euleptochiton spatulatus (Polyplacophora, Mollusca) from the Pennsylvanian of Ohio
Hoare, Richard D. pp. 48-51
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Using Simulation to Estimate Vehicle Emissions in Response to Urban Sprawl within Geauga County, Ohio
Dolney, Timothy J. pp. 52-66
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Mating Behavior and Male Territoriality in Enallagma vesperum (Odonata: Coenagrionidae) on Ponds in Ohio and Northern Michigan
Moody, Dwight L. pp. 67-70
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Book Review
pp. 71
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Ohio EPA, Ohio Academy of Science Select Environmental Scholarship Awardees
pp. 72
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Back Matter
pp. 999
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Now showing 1 - 9 of 9

Front Matter
(2009-06)
Ohio’s Academic Goals Humbled - Opinion
(2009-06) Geis, Philip A.
Impact of Lonicera maackii on Decomposition Rates of Native Leaf Litter in a Southwestern Ohio Woodland
(2009-06) Blair, Brent C.; Stowasser, Annette
The potential for invasive non-native plant species to alter forest ecosystem dynamics is an increasing concern among ecologists. However, while it is clear that invasives have a detrimental impact on native plant species, less is known about how the invasives affect the host habitat. One hypothesis suggests nutrient dynamics at and below the soil surface may be critical. This study investigated the differences in leaf litter decomposition between Lonicera maackii (an invasive shrub) and two native woody species (A. saccharum and Q. rubra). We evaluated mass loss rates from each of the species examined as well as two-species combinations of litter (six treatment combinations) in L. maackii invaded and uninvaded areas of urban woodland in Cincinnati, Ohio. We found that L. maackii decomposed significantly faster than the two native species (e.g., 21 times faster than Q. rubra). Overall, there was a trend of faster decomposition in plots located in the invaded areas although this was statistically significant in only two of the six species combinations. The impact the observed differences in decomposition rates may have on nutrient dynamics and the advantages of accelerated nutrient turnover to L. maackii is discussed.
Aesthete Canals in the Chiton Euleptochiton spatulatus (Polyplacophora, Mollusca) from the Pennsylvanian of Ohio
(2009-06) Hoare, Richard D.
Thin sections of the plates of the Pennsylvanian chiton Euleptochiton spatulatus (Hoare, Sturgeon and Hoare 1972) show the pattern and sizes of the aesthete canals. In general the canals are slightly curved extending from the dorsal surface to the ventral surface. Canals close to the articulamentum layer curve upward around the layer and run longitudinally parallel to the dorsal surface before curving to the dorsal surface or extending to the anterior margin. Canals near the lateral and anterior margins curve laterally to the margins. The canals average .05 mm in diameter and are spaced .01 mm apart. Micraesthete and megalaesthete structures were not seen in the sections. One section shows only longitudinal canals probably representing a new taxon.
Using Simulation to Estimate Vehicle Emissions in Response to Urban Sprawl within Geauga County, Ohio
(2009-06) Dolney, Timothy J.
Urban sprawl often leads to rapid expansion and haphazard developments of low density residential land uses that are spatially disjoined. Populations occupying these new developments are expected to contribute to increased traffic volumes and vehicle emissions through increased home-work journeys. Computer simulation is one of few feasible approaches to model projected trends of local communities to understand how they evolve and better plan their future courses. The VERTUS model was developed as a planning tool to estimate vehicle emissions in response to urban sprawl. The model is specific towards estimating vehicle emissions at the local and highway levels during the home-work journey. The model was applied to Geauga County, Ohio to estimate how an increase in housing over a 20-year period from 2000-2020 will influence vehicle emissions generated. Results indicate that emissions are currently highest in the western part of the county where the greatest number of households is located. This geographic distribution remains when emissions are estimated for growth in housing. While additional housing translates to more vehicle emissions, this research found that differences exist among the county’s individual municipalities in terms of emissions generated. In several instances, municipalities with a smaller growth in housing generate a greater amount of emissions than a municipality with a larger growth in housing. These differences result from variations in the commuting characteristics of each municipality’s residents and provide insight into how household travel patterns relate to vehicle emissions.
Mating Behavior and Male Territoriality in Enallagma vesperum (Odonata: Coenagrionidae) on Ponds in Ohio and Northern Michigan
(2009-06) Moody, Dwight L.
The crepuscular damselfly Enallagma vesperum Calvert, was studied to document and clarify mating behavior. This paper is a descriptive synthesis of observations which answer basic questions regarding mating behavior of E. vesperum. Beginning in July 2004 and continuing in the summers through September 2009, approximately 140 hours of direct observation on a lake in Northern Michigan and a lake and two ponds in Ohio were logged to support the results and conclusions. The literature regarding mating behavior in E. vesperum provides little information about male territoriality. The results from this six-year study offer strong evidence of male territory selection and territory defense. Copulatory behavior and ovipositional behavior were also recorded. In most coenagrionid species, males remain in tandem with ovipositing females unless the females submerge. In this study, however, females were observed ovipositing in tandem or individually into surface vegetation.
Book Review
(2009-06)
Ohio EPA, Ohio Academy of Science Select Environmental Scholarship Awardees
(2009-06)
Back Matter
(2009-06)

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