Ohio Journal of Science: Volume 90, Issue 3 (June, 1990)

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Front Matter
pp. 0
Article description | Article Full Text PDF (1309KB)

The Vegetation of Three Sphagnum-dominated Basin-type Bogs in Northeastern Ohio
Andreas, Barbara K.; Bryan, Gary R. pp. 54-66
Article description | Article Full Text PDF (1239KB)

Corn Growth Retardation Resulting from Soybean Herbicide Residues
Beuerlein, Melissa; Loux, Mark; Beuerlein, James E. pp. 67-70
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Effect of Sodium Bisulfite on Peroxidase Activity and Electrolyte Leakage in Maize in Relation to Sporulation of Bipolaris maydis Race T
Akhtar, Masood; Garraway, Michael O. pp. 71-76
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Variation in the Airborne Fungal Spore Population of the Tuscarawas Valley with Respect to Microenvironment, Time of Day, and Date
Nussbaum, Francis pp. 77-86
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Herring Gulls, Larus argentatus, Nesting on Sandusky Bay, Lake Erie, 1989
Dolbeer, Richard A.; Woronecki, P. P.; Seamans, Thomas W.; Buckingham, B. N.; Cleary, E. C. pp. 87-89
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Book Reviews
pp. 90-91
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Back Matter
pp. 999
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    Back Matter
    (1990-06)
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    Book Reviews
    (1990-06)
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    Herring Gulls, Larus argentatus, Nesting on Sandusky Bay, Lake Erie, 1989
    (1990-06) Dolbeer, Richard A.; Woronecki, P. P.; Seamans, Thomas W.; Buckingham, B. N.; Cleary, E. C.
    One of the largest herring gull (Larus argentatus} nesting populations on the Great Lakes is located in an urban setting on Sandusky Bay in the Ohio portion of Lake Erie. The survey reported here, carried out in 1989, indicated a population of 4,250 nests. The population has expanded from a focal point on Turning Point Island to coal piles at the Lower Lake Dock Company, rooftops in downtown Sandusky and breakwalls near Cedar Point. Comparison with data from a survey performed in 1976 indicates the population has grown at an average annual rate of 11.9% during the past 13 years. The population may now be expanding into suboptimal nesting areas.
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    Variation in the Airborne Fungal Spore Population of the Tuscarawas Valley with Respect to Microenvironment, Time of Day, and Date
    (1990-06) Nussbaum, Francis
    Quantitative and qualitative viable airborne fungal spore counts were made from samples collected at five sites, four times per day on 1,8,24, and 30 June, 1988 at the Tuscarawas Campus of Kent State University. Significant variation among quantitative samples was evident from nonoverlapping standard errors of the means. Lawn, hay field, and soybean field locations had significantly higher counts than parking lot and stream bank microenvironments. The highest counts occurred during the morning, when many molds disperse their spores in response to warming temperatures and the concurrent reduction in relative humidity. During early June, when rainfall was more abundant, the counts were significantly higher than during late June. The total June qualitative count included 73-5% Cladosporium spp., 13.4% brightly colored mycelia sterilia, 6.9% AUernaria spp. and 6.2% other molds. The chi-square test for independence confirms that significant variation exists among microenvironments, at different times of day, on different dates.
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    Effect of Sodium Bisulfite on Peroxidase Activity and Electrolyte Leakage in Maize in Relation to Sporulation of Bipolaris maydis Race T
    (1990-06) Akhtar, Masood; Garraway, Michael O.
    In this study, we sought to determine whether the increases in peroxidase activity and electrolyte leakage induced in maize (Zea mays L.) leaves by sodium bisulfite were causally related to the sodium bisulfite-induced increases in sporulation of the pathogen Bipolaris maydis race T on infected maize leaves. Pretreatment of detached leaves of maize inbred W64 A with sodium bisulfite (500 |ig/ml) for 24 h in the dark at 28°C increased peroxidase activity in the Tms cytoplasm (susceptible) isoline compared with the N cytoplasm (resistant) isoline. No such differences in peroxidase activity between the two isolines were observed when detached leaves were pretreated with double distilled water. The sodium bisulfite-induced increase in peroxidase activity persisted even when leaves pretreated with sodium bisulfite were inoculated with R maydis race T and subsequently incubated for 48 h in the dark at 28° C. Similarly, pretreatment with sodium bisulfite caused a greater increase in electrolyte leakage as well as in sporulation on the leaves of the susceptible than on those of the resistant isoline when compared with leaves not treated with sodium bisulfite. Sodium bisulfite showed no effect on sporulation in vitro. Leachates from the susceptible isoline pretreated with sodium bisulfite also caused greater increase in sporulation than those from the resistant isoline pretreated with sodium bisulfite.
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    Corn Growth Retardation Resulting from Soybean Herbicide Residues
    (1990-06) Beuerlein, Melissa; Loux, Mark; Beuerlein, James E.
    Imazaquin (trademark Scepter) is a weed control herbicide that was used on 15 and 37% of Ohio's 1987 and 1988 soybean acreage, respectively. Drought conditions in 1987 retarded the microbiological decomposition of imazaquin, resulting in carryover that damaged corn {Zea mays L.) grown in those fields so treated. Ohio's farmers were concerned that the more severe 1988 drought would cause even more herbicide carryover, jeopardizing their 1989 corn corp. In early 1989, imazethapyr (trade name Pursuit), another soybean herbicide chemically similar to imazaquin, received federal registration for use in the 1989 soybean crop.
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    The Vegetation of Three Sphagnum-dominated Basin-type Bogs in Northeastern Ohio
    (1990-06) Andreas, Barbara K.; Bryan, Gary R.
    Vegetation and selected ground water characteristics were examined for three closely proximate basin-type bogs in northeastern Ohio. These peatlands exhibit zonation, with a low shrub zone dominated by Chamaedaphne calyculata (Frequency-Presence Index [FPI] 4433) and Decodon verticillatus (FPI 5400) adjacent to and invading the open water. A tall shrub zone, extending aproximately 5 to 10 m to the exterior of the low shrub zone, is dominated by Vaccinium corymbosum (FPI 5533), Gaylussacia baccata (FPI 3133), andNemopanthus mucronatus (FPI 2200). Extending for the next 5 -10 m is a tree zone, dominated by Larix laricina (FPI 800), Betula alieghaniensis (FPI 198), andNyssa sylvatica (FPI 77). Sphagnum recurvum (sensu lato) (FPI 6500) forms a more or less continuous mat throughout the bogs. The vegetation of the three peatlands is similar, with similarity indices (c) ranging from 0.59 to 0.67. Based on pH, conductivity and Ca and Mg ion concentrations, these peatlands are semi-ombrotrophic to weakly minerotrophic. These communities, located near the glacial boundary, represent northern peatlands at the southern edge of glaciation.
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    Front Matter
    (1990-06)