http://hdl.handle.net/1811/1178 2013-05-19T03:58:33Z http://hdl.handle.net/1811/5662 Back Matter 1971-11-01T00:00:00Z http://hdl.handle.net/1811/5661 Index to Volume 71 1971-11-01T00:00:00Z http://hdl.handle.net/1811/5660 Book Reviews 1971-11-01T00:00:00Z http://hdl.handle.net/1811/5659 Studies of the Gyponinae : New Species of Ponanella and Acuponana DeLong, Dwight M.; Bush, Mignon Marie Two new species of Ponanella, P. surcula n. sp. and P. ramula n. sp., from Santa Cruz de la Sierra Bolivia, and one species of Acuponana, A. triplehornin. sp., from Darien, Prov. Panama, are described. Author Institution: Department of Entomology, The Ohio State University, Columbus, Ohio 43210 1971-11-01T00:00:00Z DeLong, Dwight M. Bush, Mignon Marie http://hdl.handle.net/1811/5658 Book Review 1971-11-01T00:00:00Z http://hdl.handle.net/1811/5657 Use of Soil Surveys in the Identification of Floodplains McCormack, Donald E. The frequency of flooding and depth of flood waters on alluvial soils and soils on stream terraces, was evaluated in selected sections of the Great Miami River Valley and tributaries in Montgomery and Preble Counties, Ohio. The boundaries of the highest elevations of flood waters during the floods of 1913 and 1959 were compared to the boundaries of alluvial soils and soils on stream terraces. Essentially all of the alluvial soils were inundated in both floods. About forty percent of the area of terrace soils were inundated in 1913, but less than ten percent in 1959. It is estimated that the frequency of flooding of alluvial soils is more frequent than once in forty years, and that only the very lowest portions of the terraces are inundated during floods of that frequency. Analysis of the data indicate soil surveys can be used to delineate those areas where the probability of flooding is greatest, and thus where the need for land use restrictions, such as zoning, to minimize damages due to flooding is most urgent. Author Institution: State Soil Scientist, Soil Conservation Service, U. S. Dept. of Agriculture, Columbus, Ohio 43215 1971-11-01T00:00:00Z McCormack, Donald E. http://hdl.handle.net/1811/5656 Some Ecological Notes on the Blue Color Phase of the Crayfish, Orconectes Virilis, in Two Lakes Momot, Walter T.; Gall, James E. Ecological data on growth, population density and mortality were collected and analyzed for blue color phase variants of the crayfish populations in North Twin and South Twin Lake, Otsego County, Michigan. Crayfish were collected with baited minnow traps, growth was determined by size frequency analysis of the total catch, and mortality analyzed by use of sequential mark and recapture population estimates. The results suggest that growth is density dependent, survival between blue and normally brown color phases is not different and that the percentage of blue color phase variants in these populations does not exceed one percent of the total population. The lack of difference in mortality rates between the olive brown and blue color phases and the lack of blue crayfish in the stomachs of the fish in these lakes does not support the thesis of selective mortality on the conspicuous blue color phase. Author Institution: Department of Zoology and School of Natural Resources, The Ohio State University, Columbus, Ohio 43210 1971-11-01T00:00:00Z Momot, Walter T. Gall, James E. http://hdl.handle.net/1811/5655 Bryophytes in the 1969 Crater of Deception Island, Antarctica : An Apparent Case of Rapid Long-Distance Dispersal Young, Steven B.; Klay, Jean-Roland Specimens of Marchantia polymorpha, a thallose liverwort, were found on newly exposed ground in the crater formed by the 1969 volcanic eruption occurring on Deception Island, Antarctica. The nearest known source of propagules of this species is in South America, c. 1,000 km distant. Numerous propagules must have arrived on a small area of Deception Island in the recent past. Marchantia polymorpha appears to have great dispersal potential. Its absence in other Antarctic areas is probably the result of environmental rather than historical or geographical factors. Author Institution: Institute of Polar Studies, The Ohio State University, 125 South Oval Drive, Columbus, Ohio 45210 1971-11-01T00:00:00Z Young, Steven B. Klay, Jean-Roland http://hdl.handle.net/1811/5654 Near-Infrared Sensitized Photocathodes and Film Sensitivities for Typical Xenon-Lamp Radiation and Related Subjects Gebel, Radames K. H.; Mestwerdt, Hermann R.; Hayslett, Roy R. Weighting or assessment factors of near-infrared photocathodes and Kodak 5424 film are determined for xenon-lamp illumination. These values are important for selecting detectors and determining the basic sensitivity for a given situation and instrumentation; for example, in medicine, when obtaining retinal pictures. Some other typical applications are also discussed. Charts showing the radiation from a xenon-arc lamp, with a 0.5 mm arc length and 800 watt input, and the typical efficiency values of photocathodes and film to xenon-lamp radiation are presented at spectral intervals of 20 nm for the range of 400 to 1100 nm, with and without Kodak Wratten filter 89b. Author Institution: Solid State Physics Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433 1971-11-01T00:00:00Z Gebel, Radames K. H. Mestwerdt, Hermann R. Hayslett, Roy R. http://hdl.handle.net/1811/5653 Book Review 1971-11-01T00:00:00Z http://hdl.handle.net/1811/5652 Changes of Vascular Aquatic Flowering Plants During 70 Years in Put-In-Bay Harbor, Lake Erie, Ohio Stuckey, Ronald L. Based on a survey in 1898, 40 species of vascular aquatic flowering plants were reported for Put-in-Bay harbor in western Lake Erie. Studies of this flora at various times since then have revealed a loss of species from this harbor to the extent that today 20 species of the original 40, or 50%, of the flora has disappeared. Only three of the original 40 can be considered to be common or abundant today in the harbor. During the same 70-year period, only four submersed species have invaded the harbor. Possible reasons for these changes, such as increase in water temperature, decrease in oxygen, increase in turbidity, and man's influence on the harbor by dredging, building retaining walls, increasing use of motor boats, dumping of domestic sewage, and runoff from agricultural land are all considered as possible factors that have, independently and interrelatedly, in part or in total, been responsible for this 50% loss in species composition. Comparisons with data from studies of Lake East Okoboji, Iowa, and University Bay in Lake Mendota, Wisconsin, reveal that the changes in species composition of the aquatic flora in Put-in-Bay harbor are very similar to those changes that have occurred in Lake East Okoboji, and that a trend similar to that in Put-in-Bay harbor and Lake East Okoboji is developing in University Bay of Lake Mendota. Species characteristic of clear, cool, well-oxygenated waters, whose distributions are primarily northern and whose ecological tolerances are apparently narrow, have disappeared, whereas species of turbid, warm, poorly oxygenated waters, whose distributions are primarily widespread and whose ecological tolerances are apparently wide, have survived. Author Institution: College of Biological Sciences, The Ohio State University, Columbus 43210 1971-11-01T00:00:00Z Stuckey, Ronald L. http://hdl.handle.net/1811/5651 Front Matter 1971-11-01T00:00:00Z