Ohio Journal of Science: Volume 109, Issue 2 (April, 2009)

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https://kb.osu.edu/handle/1811/52099

Front Matter
pp. 0
Article description | Article Full Text PDF (876.4Kb)

Jane Staiger Burns (1918-2009): A Tribute
Burk, William R. pp. 2
Article description | Article Full Text PDF (200.1Kb)

Spiders (Araneae) of the Glen Helen Nature Preserve, Greene County, OH
Bradley, Richard A.; Hickman, William L. pp. 3-14
Article description | Article Full Text PDF (327.5Kb)

Emerald Ash Borer (Agrilus planipennis): Towards a Classifcation of Tree Health and Early Detection
Peters, Matthew P.; Iverson, Louis R.; Sydnor, T. Davis pp. 15-25
Article description | Article Full Text PDF (475.3Kb)

Book Reviews
pp. 26-28
Article description | Article Full Text PDF (288.1Kb)

Obituaries
pp. 29-37
Article description | Article Full Text PDF (315.4Kb)

Patent Award
pp. 38-39
Article description | Article Full Text PDF (242.5Kb)

What are technology and engineering?
pp. 40
Article description | Article Full Text PDF (219.4Kb)

Back Matter
pp. 999
Article description | Article Full Text PDF (279.1Kb)

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    Back Matter
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    Patent Award
    (2009-04)
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    Obituaries
    (2009-04)
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    Book Reviews
    (2009-04)
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    Emerald Ash Borer (Agrilus planipennis): Towards a Classifcation of Tree Health and Early Detection
    (2009-04) Peters, Matthew P.; Iverson, Louis R.; Sydnor, T. Davis
    Forty-five green ash (Fraxinus pennsylvanica) street trees in Toledo, Ohio were photographed, measured, and visually rated for conditions related to emerald ash borer (Agrilus planipennis)(EAB) attacks. These trees were later removed, and sections were examined from each tree to determine the length of time that growth rates had been impacted. A classification system was developed to discern the health of the trees along with a proposed method for early detection of a declining state of vigor. The classification is not an indicator of the degree of infestation, but rather tree health, which may be linked to the degree of EAB infestation. An evaluation of the tree sections places the EAB establishment no later than the 2004 growing season. A three-class system formulated from the evaluation of epicormic shoots, canopy light transmission, and EAB exit holes can be used to monitor the health of ash trees during EAB outbreaks. The classification system could potentially give homeowners, property managers, and agencies a way to detect and treat this problem earlier, especially in urban and park settings, and before trees are fully infested and exhibiting later-stage signs of decline. It is probably not practical for forest applications. Early detection and treatment not only can save selected trees, but it also might slow the spread of the insect, thereby giving additional trees a chance to survive the initial invasion.
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    Spiders (Araneae) of the Glen Helen Nature Preserve, Greene County, OH
    (2009-04) Bradley, Richard A.; Hickman, William L.
    The purpose of the current project was to assess the species diversity of spiders (Araneae) at Glen Helen Nature Preserve and compare it to the diversity of spiders at other forest sites in the region. Glen Helen Nature Preserve is located near the village of Yellow Springs, Greene County, OH. The reserve area is 404.6 hectares. The primary habitat is mixed mesophytic hardwood forest. In addition to forested areas, spider sampling was conducted in old field and restored tallgrass prairie habitats. Samples were collected between 4 November 1993 and 1 September 2008 with the preponderance of sampling occurring during summer. Sampling techniques included pitfall traps, litter extraction, visual searches at ground level and in the understory, and sweep/beat samples. A total of 108 collections from 33 sites in the preserve produced 3,766 identified specimens. The spider fauna of Glen Helen is relatively diverse including representatives of 23 families and 170 species. Three species represent first records for Ohio. There is little clear evidence that this site has a depauperate spider fauna, despite its relatively isolated position in a fragmented landscape. Of the specimens collected within forest sites at Glen Helen, 93 species were found which is similar to the mean value of 94 spider species recorded for 5 other forested sites within the North Central Till Plains ecoregion that have been sampled during the Ohio Spider Survey. Open habitats yielded relatively more species per unit sampling effort than forested sites. Rarefaction analysis estimates predict a complete spider diversity of between 190-227 species.
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    Jane Staiger Burns (1918-2009): A Tribute
    (2009-04) Burk, William R.
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    Front Matter
    (2009-04)