ESSAYS 2010 Nagoya Women’S Studies Research Group JAPAN
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Over Twenty Years Trend of Chloride Ion Concentration in Lake Biwa
Papers from Bolsena Conference (2002). Residence time in lakes:Science, Management, Education J. Limnol., 62(Suppl. 1): 42-48, 2003 Over twenty years trend of chloride ion concentration in Lake Biwa Yasuaki AOTA*, Michio KUMAGAI1) and Kanako ISHIKAWA2) Institute of Nature and Environmental Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan 1)Lake Biwa Research Institute, Uchidehama, Otsu, Shiga 520-0806, Japan 2)Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan *e-mail corresponding author: [email protected] ABSTRACT Recent increase of chloride ion concentration in Lake Biwa was considered. Over the past 20 years' data at the North Basin of Lake Biwa showed that chloride ion concentration has been continuously increasing from 7.4 to 9.9 mg l-1 at 0.5 m depth from lake surface and from 7.3 to 9.9 mg l-1 above the bottom (depth of over 80 m from lake surface). This low level salinity indicated, how- ever, about 35% increase through 20 years. In this paper, we reported the trend and the tendency of chloride ion concentration at some locations and the change of climatic data through 20 years in Lake Biwa. In a short period within one year, chloride ion con- centration clearly fluctuated in the upper water layer. This fluctuation was mostly influenced by precipitation. Similar trend of chlo- ride ion concentration could be seen in the South Basin of Lake Biwa with much higher concentration than that in the North Basin. We also discussed the long-term changes of chloride concentrations in 5 major rivers with large catchment area, water level and precipitation. -
Digeneans (Trematoda) Parasitic in Freshwater Fishes (Osteichthyes) of the Lake Biwa Basin in Shiga Prefecture, Central Honshu, Japan
Digeneans (Trematoda) Parasitic in Freshwater Fishes (Osteichthyes) of the Lake Biwa Basin in Shiga Prefecture, Central Honshu, Japan Takeshi Shimazu1, Misako Urabe2 and Mark J. Grygier3 1 Nagano Prefectural College, 8–49–7 Miwa, Nagano City, Nagano 380–8525, Japan and 10486–2 Hotaka-Ariake, Azumino City, Nagano 399–8301, Japan E-mail: [email protected] 2 Department of Ecosystem Studies, School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka, Hikone City, Shiga 522–8533, Japan 3 Lake Biwa Museum, 1091 Oroshimo, Kusatsu City, Shiga 525–0001, Japan Abstract: The fauna of adult digeneans (Trematoda) parasitic in freshwater fishes (Osteichthyes) from the Lake Biwa basin in Shiga Prefecture, central Honshu, Japan, is studied from the literature and existing specimens. Twenty-four previously known, 2 new, and 4 unidentified species in 17 gen- era and 12 families are recorded. Three dubious literature records are also mentioned. All 30 con- firmed species, except Sanguinicolidae gen. sp. (Aporocotylidae), are described and figured. Life cy- cles are discussed where known. Philopinna kawamutsu sp. nov. (Didymozoidae) was found in the connective tissue between the vertebrae and the air bladder near the esophagus of Nipponocypris tem- minckii (Temminck and Schlegel) (Cyprinidae). Genarchopsis yaritanago sp. nov. (Derogenidae) was found in the intestine of Tanakia lanceolata (Temminck and Schlegel) (Cyprinidae). Asymphylodora innominata (Faust, 1924) comb. nov. is proposed for A. macrostoma Ozaki, 1925 (Lissorchiidae). A key to the families, genera, and species of these digeneans is provided. Host-parasite and parasite- host lists are given. Key words: adult digeneans, Trematoda, parasites, morphology, life cycle, Philopinna kawamutsu sp. -
Oceanography
Department of OCEANOGRAPHY PROGRESS REPORT Ecological Studies of Radioactivity in the Columbia River Estuary and Adjacent Pacific Ocean Norman Cutshall, SCHOOL OF SCIENCE Principal Investigator Compiled and Edited by James E. McCauley Atomic Energy Commission Contract AT(45-1) 2227 Task Agreement 12 OREGON STATE UNIVERSITY RLO 2227-T12-10 Reference 71-18 1 July 1970 through 30 June 1971 ECOLOGICALSTUDIESOF RADIOACTIVITYIN THE COLUMBIA RIVER ESTUARY AND ADJACENTPACIFIC OCEAN Compiled andEdited by James E. McCauley Principal Investigator: NormanCutshall Co-investigators: Andrew G. Carey, Jr. James E. McCauley William G. Pearcy William C. Renfro William 0. Forster Department of Oceanography Oregon State University Corvallis, Oregon 97331 PROGRESS REPORT 1 July 1970 through 30 June 1971 Submitted to U.S. Atomic Energy Commission ContractAT(45-1)2227 Reference 71-18 RLO 2227-T-12-10 July 1971 ACKNOWLEDGMENTS A major expense in oceanographic research is "time at sea." Operations on the R/V YAQUINA, R/V CAYUSE, R/V PAIUTE, AND R/V SACAJEWEA were funded by several agencies, with the bulk coming from the National Science Founda- tion and Office of Naval Research. Certain special cruises of radiochemical or radioecological import were funded by the Atomic Energy Commission, as was much of the equipment for radioanalysis and stable element analysis. Support for student research, plussome of the gamma ray spectometry facilities, were provided by the Federal Water Quality Administration. We gratefully acknowledge the role of these agencies insupport of the research reported in the following pages. We also wish to express our thanks to the numerous students and staff who contributed to the preparation of thisprogress report. -
Beyond the Lucky Dragon: Japanese Scientists and Fallout Discourse in the 1950S
36 Jacob Darwin HAMBLIN and Linda M. RICHARDS Beyond the Lucky Dragon: Japanese Scientists and Fallout Discourse in the 1950s Jacob Darwin HAMBLIN* and Linda M. RICHARDS** Abstract In the history of the 1950s fallout controversy, associated with the first hydrogen bomb tests, scholars often focus on the plight of the Japanese crew of the Fukuryū Maru, or as it was called in English-language newspapers, the Lucky Dragon. Doing so silences the Japanese who tried to show that fallout was not simply about one ship, one part of the ocean, or even one generation of humans. In this essay we show how Japanese perspectives influenced several American scientists to think differently about the implications of nuclear tests for humans and the natural environment. We propose three fundamental conceptual points about fallout that already were present in Japanese scientific discourse in the mid-1950s. One was spatial; one was temporal; one was legal. The Japanese ideas, from a range of scientists, informed the views of American scientists during the fallout controversy of the 1950s, not just providing data but shaping both scientific and political discourse in the West. Key words: Lucky Dragon, radiation effects, Yasushi Nishiwaki, Jane Nishiwaki, Ava Helen Pauling, Linus Pauling 1. Introduction The central role of Japan in the 1950s fallout controversy is impossible to ignore. That the same country to be victim of the first atomic weapons should then become victim of fallout from the first hydrogen bomb tests, all at the hands of Americans, is one of the most memorable features of the historical narrative. -
Lake Biwa Comprehensive Preservation Initiatives
Bequeathing a Clean Lake Biwa to Future Generations Lake Biwa Comprehensive Preservation Initiatives ― Seeking Harmonious Coexistence with the Lake's Ecosystem ― Lake Biwa Comprehensive Preservation Liaison Coordination Council Lake Biwa Comprehensive Preservation Promotion Council Contents 1 Overview of Lake Biwa and the Yodo River Basin ○ Overview of the Yodo River Basin 1 ○ Water Use in Lake Biwa and the Yodo River Basin ○ Land Use in Lake Biwa and the Yodo River Basin 2 Overview of Lake Biwa ○ Lake Biwa, an Ancient Lake 2 ○ Dimensions of Lake Biwa 3 Development of Lake Biwa and the Yodo River Basin ○ Early History 3 ○ Expanded Farmlands, Increased Rice Production and Subsequent Development of Commerce ○ A Political Center and Cradle of Culture and Tradition ○ Industrial and Economic Development after the Meiji Restoration ○ Changing Lifestyles 4 Background of Lake Biwa Comprehensive ○ Farmland Development and Flooding in the Edo Period (1603 - 1868) 5 Development Program ○ Flood Control During the Meiji Period (1868 - 1912) ○ Modern Projects for Using Water of Lake Biwa ○ Increasing Demand for Water in the Showa Period (1926 - 1989) 5 Lake Biwa Comprehensive Development Program ○ Program System 7 ○ Breakdown of the Program Expenses ○ Environmental Preservation ○ Flood Control ○ Promotion Effective Water Use 6 Outcomes of the Lake Biwa ○ Effects of Flood Control Projects 9 Comprehensive Development Program ○ Effects of Projects Promoting Effective Use of Water ○ Effects of Environmental Preservation Projects 7 Current Situation of -
Endogenous Social Discount Rate, Proportional Carbon Tax, and Sustainability: Do We Have the Right to Discount Future Generations’ Utility?
Endogenous Social Discount Rate, Proportional Carbon Tax, and Sustainability: Do we have the Right to Discount Future Generations’ Utility? Masayuki Otaki Institute of Social Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, Japan Email: [email protected] Abstract [ Background] This paper examines a serious issue - whether future generations ’utility should be discounted. The issue is of vital importance because future generations will never have the opportunity to reveal their preference regarding the current resource allocation and yet this will ultimately affect their utility. This paper addresses with this issue in the context of the phenomenon of global warming that is crucially connected with the emission and accumulation of CO2. [ Results] The analysis focuses on how the social optimum is attained under the con- straint of sustainability and reveals the following relationship between the opti- mal policies: not discounting utility in social planning corresponds to adopting the socially optimal carbon tax rate in a decentralized economy. We also prove that the optimal carbon tax regime satisfies time consistency, indicating that policy is Pareto efficient for every generation given the sustain- ability constraint. This implies that the optimal policy is incentive compatible for every generation. In addition, it is shown that the theory can be extended from this finite horizon case to also apply to an infinite horizon. Finally, the second-best proportional carbon tax rates are calculated using available data. The result astonishingly reveals that even if we apply a social discount rate of 5 per cent to annum in the planning economy, it is still equivalent to levying 32 per cent proportional carbon tax rate. -
Digeneans Parasitic in Freshwater Fishes (Osteichthyes) of Japan. IV. Derogenidae
Bull. Natl. Mus. Nat. Sci., Ser. A, 41(2), pp. 77–103, May 22, 2015 Digeneans Parasitic in Freshwater Fishes (Osteichthyes) of Japan. IV. Derogenidae Takeshi Shimazu 10486–2 Hotaka-Ariake, Azumino, Nagano 399–8301, Japan E-mail: [email protected] (Received 20 March 2015; accepted 1 May 2015) Abstract Digeneans of the family Derogenidae Nicoll, 1910 (Trematoda) parasitic in freshwater fishes of Japan are reviewed: Allogenarchopsis problematica (Faust, 1924), Genarchopsis goppo Ozaki, 1925, Genarchopsis anguillae Yamaguti, 1938, Genarchopsis gigi Yamaguti, 1939, Genar- chopsis fellicola Shimazu, 1995, Genarchopsis chubuensis sp. nov. and Genarchopsis spp. 1 and 2 of Shimazu, 1995. The new species G. chubuensis is proposed on the basis of specimens found in the stomach of Gymnogobius urotaenia (Hilgendorf, 1879) (Gobiidae) (type host) and several other species from the central part of Honshu, Japan (type locality: Lake Suwa in Nagano Prefec- ture). Each species is described and figured with a summarized life cycle where known. The life cycle of Genarchopsis Ozaki, 1925 in the present paper is discussed. A key to the genera and spe- cies of the Derogenidae in the present paper is given. Key words : Digeneans, Allogenarchopsis, Genarchopsis, Genarchopsis chubuensis sp. nov., freshwater fishes, Japan, review. term; Mg, Mehlis’ gland; o, ovary; od, oviduct; Introduction op, ootype pouch; os, oral sucker; ot, ootype; p, This is the fourth paper of a series that reviews pharynx; pc, prostatic cells; pcec, primary caudal adult digeneans (Trematoda) parasitic in fresh- excretory canal; pep, primary excretory pore; pp, water fishes (Osteichthyes) of Japan (Shimazu, pars prostatica; s, sphincter; scec, secondary cau- 2013). -
Annual Layers in River-Bed Sediment of a Stagnant River-Mouth Area of the Kitagawa Brook, Central Japan
doi:10.5194/piahs-367-251-2015 Sediment Dynamics from the Summit to the Sea 251 (Proceedings of a symposium held in New Orleans, Louisiana, USA, 11–14 December 2014) (IAHS Publ. 367, 2014). Annual layers in river-bed sediment of a stagnant river-mouth area of the Kitagawa Brook, Central Japan YOSHIMASA KURASHIGE1, TOSHIAKI NAKANO2, ERI KASUBUCHI3, 1 1 MASAHIRO MARUO & HANAKO DOMITSU 1 School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone 522-8533, Japan [email protected] 2 School of Environmental Science, The University of Shiga Prefecture, 2500 Hassaka-cho, Hikone 522-8533, Japan 3 School of Education, Bukkyo University, 96 Kitahananobo-cho, Murasakino, Kita-ku, Kyoto 603-8301, Japan Abstract The river mouth of Kitagawa Brook is normally stagnant because it is easily closed by sand and gravel transported by littoral currents of Biwa Lake, Japan. A new urban area exists in the basin and sewerage works were constructed in the early 1990s, so contaminated water with a bad odour had flowed into the brook before the sewerage works. To reduce the smell, the river mouth was excavated to narrow the channel in the early 1980s. Thus, river-bed sediment after this excavation only occurs at the river mouth. From the upper 24 cm of a sediment core, we found 19 strata of leaves which were supplied from deciduous trees in autumn. We also found several gravel layers which were supplied from the lake during severe storms. The combination of veins and gravel layers were reconstructed for about 20 years of sediment records with an error of two to three years. -
Determinations of Humic Substances and Other Dissolved Organic Matter and Their Effects on the Increase of COD in Lake Biwa
ANALYTICAL SCIENCES JANUARY 2004, VOL. 20 159 2004 © The Japan Society for Analytical Chemistry Determinations of Humic Substances and Other Dissolved Organic Matter and Their Effects on the Increase of COD in Lake Biwa Shinichi AOKI,* Yasuro FUSE,** and Etsu YAMADA*,**† *Department of Chemistry and Material Technology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606–8585, Japan **Center for Environmental Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606–8585, Japan Humic substances and other dissolved organic matter (DOM) in Lake Biwa and the surrounding rivers were investigated to elucidate their origins and behavior. An annual increase in chemical oxygen demand (COD) has been observed in the northern basin of Lake Biwa since 1985. The concentrations of dissolved organic carbon (DOC) in the northern and southern basins of Lake Biwa were 1.7 – 2.4 mgC/l and 1.9 – 2.6 mgC/l, respectively. The DOC concentrations tended to be high in summer and low in winter, and the seasonal changes in the concentrations of humic substances were small. The humic substances content of DOM was considered to be comparatively small because the ratio of the concentration of humic substances to DOC was in the range of 0.14 – 0.32. From the results of the fractionation of DOM in lake waters, it was estimated that hydrophobic acids, such as humic substances and hydrophilic acids, were about 25% and 45%, respectively. The main origin of hydrophobic acids in Lake Biwa may be humic substances from soils around the rivers that flow into Lake Biwa, while hydrophilic acids may be due to the inner production by phytoplankton. -
World Checklist of the Genus Cardamine L. (Draft 1)
World checklist of the genus Cardamine L. (Draft 1) 1,2Marhold, K., 1Kučera, J., 1Zozomová-Lihová, J. & 3Al-Shehbaz, I. A. 1Institute of Botany, Slovak Academy of Sciences, Dúbravská cesta 9, SK-845 23 Bratislava, Slovak Republic 2Department of Botany, Charles University, Benátská 2, CZ-128 01 Praha 2, Czech Republic 3 Missouri Botanical Garden, P.O. Box 299, St. Louis, Missouri, U.S.A. 63166-0299 Comments on this draft should be sent to: [email protected] Acknowledgements: We acknowledge financial support provided by the Slovak Research and Development Agency (project no. RPEU-0003-06, to Karol Marhold). Distribution data follow: Brummitt, R. K. (2001): World geographical scheme for recording plant distributions. Edition 2. Hunt Institute for Botanical Documentation, Carnegie Mellon University, Pittsburgh. For references to the chromosome number reports see: Marhold, K. & Kučera, J., Karyological database of the genus Cardamine, available at http://www.cardamine.sav.sk/ Cardamine adriatica Jar. Kučera, Lihová & Marhold, Taxon 59: 161 (2010). Ind. loc.: “Dalmatien “Urulia” [near D. Brela village] v. Welden” – Type: unknown – the original material was most likely destroyed in 1849 during the great Zwinger fire (Stafleu & Cowan, 1983); Neotype (Kučera et al. 2010): Croatia, Biokovo Mts., Baška Voda, village of Bast, 43°21´31´´N, 16°59´18´´E, 398 m a. s. l., 24.IV.2003, J. Kučera & M. Kolník s.n. (SAV!). ≡ Pteroneurum bipinnatum Rchb., Fl. Germ. Excurs.: 676. 1830–1832 (non C. bipinnata (C.A. Mey.) O.E. Schulz 1903) ≡ C. maritima f. bipinnata (Rchb.) Sagorski in Österr. Bot. Z. 61: 18. 1911 ? = Pteroneurum microphyllum J. -
Copepoda: Harpacticoida) from Japan, Its Phylogeny Based on the Mtcoi Gene and Comments on the Genus Schizoperopsis
Journal of Natural History, 2015 Vol. 49, Nos. 41–42, 2493–2526, http://dx.doi.org/10.1080/00222933.2015.1028112 A new species of Schizopera (Copepoda: Harpacticoida) from Japan, its phylogeny based on the mtCOI gene and comments on the genus Schizoperopsis Tomislav Karanovica,b*, Kichoon Kimc and Mark J. Grygierd aDepartment of Biological Science, Sungkyunkwan University, College of Science, Suwon, Korea; bInstitute for Marine and Antarctic Studies, University of Tasmania, Hobart, Australia; cDepartment of Life Sciences, Hanyang University, Seoul, Korea; dLake Biwa Museum, Kusatsu, Japan (Received 29 August 2014; accepted 8 March 2015; first published online 16 April 2015) The predominantly marine genus Schizopera Sars, 1905 has only two significant inland water species-flocks, one in the ancient African Lake Tanganyika and the other in subterranean waters of Western Australia. Discovery of Schizopera abei sp. nov. from several interstitial locations in the vicinity of the ancient Lake Biwa has wider implications for the study of morphological homoplasies in the genus, as well as for the study of freshwater invasions in harpacticoid copepods. The new Schizopera species belongs to a small group of congeners with a two-segmented endopod of the fourth leg, which used to be recognised as a separate genus, Schizoperopsis Apostolov, 1982. Our reconstructed phylogenies based on the mtCOI partial sequences suggest that this character probably evolved convergently in at least some Schizopera, thus rendering the genus Schizoperopsis polyphyletic. However, almost all basal nodes in our cladograms are weakly supported, which shows limitations of a single-gene approach for reconstructing phylogenetic rela- tionships. The new species is the first member of its genus from Japanese inland waters, and it has no close relatives among extent congeners anywhere in the world. -
Kunio Ueda.Pmd
Current World Environment Vol. 9(1), 17-26 (2014) Distribution of Sand Particles Along the Shoreline of Lake Biwa in Shiga Prefecture and Considerations from Lake Biwa and Seto Inland Sea, Japan KUNIO UEDA Department of Environmental Science, The University of Shiga Prefecture, Hikone City, 522-8533, Japan. http://dx.doi.org/10.12944/CWE.9.1.03 (Received: February 10, 2014; Accepted: March 03, 2014) ABSTRACT The development of sand littoral zones is critical to supporting specific species in lakes and oceans. The construction of dams on rivers changes the distribution of sediments in littoral zones, and the relationship between dam construction on rivers, the inflow of small particles and increased eutrophication and red tide occurrences was demonstrated for Lake Biwa using public data. Many dams were constructed on rivers around Lake Biwa after the Second World War, and the old and new Araizeki dams were constructed on the out flowing Seta River, restricting flow and increasing the tendency of small particles to be deposited on the floor of Lake Biwa. Inouchi6 reported the distribution of seafloor sediment particle sizes in the Seto Inland Sea. Inouchi showed several fan-shaped distributions of sediment particles centered at the mouths of rivers. After many dams were constructed on the rivers in the period following the Second World War, particles smaller than Mdφ 4 to 6 were thought to increase in the rivers, and these smaller particles were deposited farther offshore from the river mouth if tidal currents were faster than 0.5 to 1.0 knots. Areas of the Seto Inland Sea in 1975 that were affected by silting and subsequent red tide blooms include Hiroshima Bay, Hiuti-nada, Harima-nada and Osaka Bay.