Does Long-Term Macrophyte Management in Lakes Affect Biotic Richness and Diversity?

We hypothesize that the richness and diversity of the biota in Lake Moraine (42°50’47”N, 75°31’39”W) in New York have been negatively impacted by 60 years of macrophyte and algae management to control Eurasian watermilfoil ( Myriophyllum spicatum L.) and associated noxious plants. To test this hypothesis we compare water quality characteristics, richness and selected indicators of plant diversity, zooplankton, benthic macroinvertebrates and fish in Lake Moraine with those in nearby Hatch Lake (42°50’06”N, 75°40’67”W). The latter is of similar size and would be expected to have similar biota, but has not been subjected to management. Measurements of temperature, pH, oxygen, conductivity, Secchi transparency, calcium, total phosphorus and nitrites + nitrates are comparable. Taxa richness and the diversity indices applied to the aquatic macrophytes are similar in both lakes. (PDF has 8 pages.

International Conflict and Collective Security: The Principle of Concern in International Organization

The control of man’s violence against man presents to modern society its greatest problem. A capacity to deal with the most devastating type of conflict—international war—is crucial to human welfare and even to the survival of civilization. Nations have become interdependent in technology and economy, but world political organization is based on a system of sovereign states now divided into hostile camps armed with absolute weapons. This book is a study of the development of collective security, or international cooperative action for the maintenance of peace. The approach is based upon the “principle of concern,” a recognition of the fact that organization to preserve peace is essential for every political community. As a case study Willard N. Hogan has analyzed the principle of collective security as it has worked in practice in international organizations over the past thirty-five years. He holds that collective security is not unworkable as a method for stopping aggression and maintaining peace. Willard Hogan is professor of political science at State University Teachers College, New Paltz, New York, and director of the Information Center for the United Nations at the same college.https://uknowledge.uky.edu/upk_political_science_international_relations/1009/thumbnail.jp

Comparative Studies on the Life Cycle and Ecology of Two Populations of Physa Heterostropha (Say) (Gastropoda: Pulmonata)

Author Institution: Bio Control Packaging Department, Adolph Coors Company, and Biology Department, New York State University, College at OneontaHERRMANN, SHEILA A. AND WILLARD N. HARMAN. Comparative studies of the life cycle and ecology of two populations of Physa heterostropha (Say) Gastropoda: Pulmonata). Ohio J.Sci. 75(2): 85, 1975

Fresh-Water Mollusca of the Finger Lakes Region of New York

Author Institution: Biology Department, New York State University College, Oneonta, New York 13820, and Department of Entomology and Limnology, Cornell University, Ithaca, New York 14850A study of the molluscan fauna in central New York State has provided information on the distribution of fresh-water mollusks in that region, and on the species composition of snails and pearly fresh-water mussels in the major Finger Lakes and thirteen additional lakes and reservoirs in the Oswego River drainage basin. The data are based on 120 collections taken by hand picking, sieving, and the utilization of diving equipment. Small isolated upland lakes (Dryden, Cazenovia, Como, Panther, Kasoag Lakes), meromictic lakes (Fayetteville Green, Round, and Clark Reservation Lakes), and reservoirs with abnormal silt content and frequently fluctuating water levels (Jamesville and DeRuyter Reservoirs) support only a few species of mollusks. In the meromictic lakes in particular, empty shells collected are believed to represent former molluscan populations whose shells are preserved by the calcium-rich waters. Morphometrically oligotrophic lakes on the major waterways (the seven largest Finger Lakes) possess moderate numbers of molluscan species. In contrast, the shallow lakes of the limestone belt that are in direct communication with the larger rivers have the greatest species diversity. A table is included that shows the distributions of the species of mollusks collected in these bodies of water, distinguishing between living and dead representatives

High-resolution visible and infrared imaging for large paintings: a case study of Israel in Egypt by Poynter

Israel in Egypt is an oil on canvas painting by Sir Edward Poynter. In 1868 the painting was depicted in the Illustrated London News in which there are reports of changes made to the composition of the painting after its first exhibition. Visible and infrared imaging techniques have been used to determine whether additions to the initial composition can be identified from underdrawings. The painting measures 137 cm × 317.5 cm and was not able to be relocated for the study, therefore portable imaging equipment was used throughout. A Canon 700D DSLR camera was modified to allow nearinfrared imaging when combined with a set of longpass filters at 720 nm, 850 nm and 950 nm. An Osiris infrared reflectography camera was also used to look further into the infrared with a sensitivity range of 900 nm – 1700 nm. To obtain high-resolution images with the modified DSLR, a 100 mm lens was used from a distance of 6 metres. In both visible and near-infrared, eight images were taken across the surface of the painting and these images were combined into high-resolution visible and near-infrared panoramas. Images from the Osiris infrared camera were processed in Matlab to create a mosaic from the overview image with high-resolution regions of interest. All processed images were registered in Matlab along with the woodcut engraving of the painting shown in the Illustrated London News. An interactive web-browser viewer was created to enable display and comparison of the registered high-resolution images, allowing users to explore and zoom in to specific areas of interest across the four high-resolution images simultaneously. Conservators and art historians can utilise the resulting images combined with the image viewer to analyse the painting and potentially develop a new interpretation of the composition

Occurrence (1956) of Haemoproteus sacharovi and Plasmodium relictum in a Central Iowa Pigeon Colony

Naturally occurring infections of Plasmodium relictum and H aemoproteus sacharovi in pigeons of Central Iowa have recently been reported (Becker, Hollander and Pattillo, 1956). In that survey, involving pigeons of all ages, both microscopic examination of stained blood films and isodiagnosis were employed, but the examination of blood films stained in Giemsa was the sole procedure relied upon in the 1956 survey. The birds concerned were young, ranging in age from two to eight weeks. All belonged to the Central Iowa colony to which reference was made in the previous paper. A total of 114 blood films was examined, distributed by dates as follows: June 29, 32; July 21, 23; September 8, 33; September 18, 26. There were a few duplications among the birds examined on September 8 and September 18. The average ages (in weeks) of the squabs on the four dates were as follows: June 29, 4.7; July 21, 3.7; September 8, 3.6; September 18, 4.4. There were, in addition, two other young squabs which will be discussed later

MS

thesisThe writer is indebted to Dr. N. C. Williams who suggested the problem and for assisting in the many phases of this study. It is also a pleasure to acknowledge Dr. F. W. Christiansen and Dr. E. Roedder for helpful suggestions and criticism during the preparation of the manuscript