PROFILE

氏名:大澤 直哉
職名:准教授
所属:京都大学 大学院農学研究科 地域環境科学専攻 森林生態学分野
略歴:
学歴
昭和52年3月 東京都立西高等学校卒業
昭和54年4月 京都大学農学部林学科入学
昭和59年3月 同上卒業
昭和59年4月 京都大学大学院農学研究科修士課程農林生物学専攻 入学
昭和61年3月 同上修了(京都大学農学修士)
昭和61年4月 京都大学大学院農学研究科博士課程農林生物学専攻 進学
平成 3年3月 同上修了(京都大学農学博士)
職歴
平成2年4月より平成 4年3月まで 日本学術振興会特別研究員
平成4年4月より平成 7年1月まで 京都大学研修員
平成7年1月より平成10年1月まで マレイシア森林研究所研究員(国際協力事業団派遣専門家)
平成10年2月より 京都大学大学院大学院文部科学教官(講師)

研究テーマ

  • 熱帯及び温帯における、植物と動物の相互関係
  • テントウムシの生活史戦略と個体群動態
  • 人為的伐採が地上徘徊性昆虫群集に与える影響

研究業績

  1. Osawa N., Toft R., Tuno N., Kadowaki K., Fukiharu T., Buchanan P.K., Tanaka C. (2010) The community structures of fungivorous insects on the Fly Agaric Amanita muscaria in New Zealand. New Zealand Entomologist (in press).
  2. Tuno N., Osawa N., Tanaka C. (2010) Fungal toxins relevant to animals ? the case study of Amanita. In: Wen Zhang, Hong Liu (eds.). Behavioral and Chemical Ecology, pp235-250, Nova Science Publishers, New York.
  3. Imanishi A., Morimoto J., Imanishi J., Shibata S., Nakanishi A., Osawa N., Sakai S. (2010) Sprout initiation and growth for three years after cutting in an abandoned secondary forest in Kyoto, Japan. Landscape Ecology and Engineering 6: 219-234.
  4. Osawa N., Yoshinaga A. (2009) The presence of micropyles in the shells of developing and undeveloped eggs of the ladybird beetle Harmonia axyridis (Coleoptera: Coccinellidae). European Journal of Entomology 106: 607-610.
  5. Matsuyama S., Osawa N., Sakimoto M. (2009) Generalist pollinators in the dioecious shrub Rhus trichocarpa Mig. (Anacardiaceae) and their role in reproductive success. Plant Species Biology 24: 215-224.
  6. Nakanishi A., Inagaki N., Shibata S., Osawa N., Hirata K. (2009) Effects of patch cutting on leaf nitrogen nutrition in hinoki cypress (Chamaecyparis obtusa Endlicher) at different elevations along a slope in Japan. Journal of Forest Research 14: 388-393.
  7. Osawa N., Ohashi K. (2008) Sympatric coexistence of sibling species Harmonia yedoensis and H. axyridis (Coleoptera: Coccinellidae) and the roles of maternal investment through egg and sibling cannibalism. European Journal of Entomology 105: 445-454.
  8. Tuno N., Takahashi K.H., Yamashita H., Osawa N., Tanaka C. (2007) Tolerance of Drosophila flies to ibotenic acid poisons in mushrooms. Journal of Chemical Ecology 33: 311-317.
  9. Mizumachi E., Mori A., Osawa N., Akiyama R., Tokuchi N. (2006) Rhythmic growth of Quercus serrata saplings in responses to insect damages and nutrient conditions. Annals of Botany 98: 219-226.
  10. Yamashita H., Tanaka C., Nakayama H., Tuno N., Osawa N. (2005) New host record for three species of scuttle fly, Megaselia flava, M. kanekoi, and M. gotoi (Diptera: Phoridae), on a poisonous fungus, Amanita ibotengutake (Agaricales: Amanitaceae). Entomological Science 8: 223-225.
  11. Osawa N., Terai A., Hirata K., Nakanishi A., Makino A., Sakai S., Sibata S. (2005) Logging impacts on forest carabid assemblages in Japan. The Canadian Journal of Forest Research 35: 2698-2708.
  12. Mizuki I., Osawa N., Tsutsumi T. (2005) Thrips (Thysanoptera; Thripidae) on the flowers of a dioecious plant, Dioscorea japonica (Dioscoreaceae). The Canadian Entomologist 137: 712-715.
  13. Ishimaru K., Tokuchi N., Osawa N., Kawamura K., Takeda H. (2005) Estimating the suitability of four broad-leaved tree species in different successional stage for revegetating an eroded granite hill slope. Journal of Forest Research 10: 27-34.
  14. Ohhashi K., Sakuratani Y.,Osawa N., Yano S., Takafuji A.(2005) Thermal microhabitat utilization by the ladybird beetles, Coccinella septempunctata (Coleoptera: Coccinellidae) and its life histoty consequences. Environmental Entomology 34: 432-439.
  15. Osawa N.(2005) The effect of prey availability on ovarian development and oosorption in the lady bird beetle Harmonia axyridis (Coleoptera: Coccinellidae). European Journal of Entomology 102: 503-511.
  16. Mizumachi E., Osawa N., Akiyama R., Tokuchi N. (2004) The effects of herbivory and soil fertility on the growth petterns of Quercus serrata and Q. crispla saplings at the shoot and individual levels. Population Ecology 46: 203-211.
  17. Osawa N. (2003) The influence of female oviposition strategies on sibling cannibalism in the ladybird beetle Harmonia axyridis. European Journal of Entomology 100: 43-48.
  18. Osawa N. (2002) Sex-dependent effects of sibling cannibalism on life history traits in the ladybird beetle Harmonia axyridis (Coleoptera: Coccinellidae). Biological Journal of the Linnean Society 76: 349-360.
  19. Sugiura S.,Osawa N. (2002) Temporal response of parasitoids to the density of the leafroller Eudemis gyrotis (Lepidoptera, Tortricidae) on Bayberry, Myrica rubra (Myricaceae). Environmental Entomology 31: 988-994.
  20. Osawa N., Tsubaki Y. (2002) Seasonal variation and community structure of tropical bees in a lowland tropical forest of peninsular Malaysia: the impact of general flowering. In: Okuda T., Niiyama K., Thomas S.C., Ashton P.S. (eds.). Pasoh: Ecology and Natural History of Lowland Rain Forest in Peninsular Malaysia, pp.275-283, Springer Verlag, Tokyo.
  21. Osawa N., Okuda T. (2002) The herbivorous insects on tropical seedlings. In: Okuda T., Niiyama K., Thomas S.C., Ashton P.S. (eds.). Pasoh: Ecology and Natural History of Lowland Rain Forest in Peninsular Malaysia, pp. 405-415, Springer Verlag, Tokyo.
  22. Sugiura S.,Osawa N.(2001) Parasitoid community associated with the leafroller Eudemis gyrotis (Meyrick) (Lepidoptera, Tortricidae) on a bayberry Myrica rubra (Myricaceae). Entomological Sciences 4: 25-34.
  23. Maeto K., Osawa N., Fukuyama K. (2001) Impact of mast fruiting on abundance of Vespid wasps (Hymenoptera) in a lowland tropical forest of Peninsular Malaysia. Entomological Science 4: 247-250.
  24. Osawa N.(2001) The effect of hibernation on the seasonal variations in adult body size and sex ratio of the polymorphic ladybird beetle Harmonia axyridis: the role of thermal melanism. Acta Societatis Zoologicae Bohemicae 65: 269-278.
  25. Osawa N.(2000) Population field studies of the aphidophagous ladybird beetle Harmonia axyridis: resource tracking and population characteristics. Population Ecology 42: 115-127.
  26. Osawa N. & L. Kirton (1997) A new host record of the Common Posy, Drupadia ravindra moorei (Lepidoptera, Lycaenidae), in Malaysia. Japanese Journal of Entomology 65: 853-854.
  27. Osawa N.(1996) Colonization patterns of Aulacorthum magnolidae (Aphididae: Hemiptera) on Sambucus sieboldiana (Caprifoliaceae); the impact of predatory disturbance on an aphid colony and the effects of aphid colonization on plant structure. Japanese Journal of Entomology 64: 93-109.
  28. Osawa N. (1994) The occurrence of multiple mating in a wild population of the ladybird beetle Harmonia axyridis PALLAS (Coleoptera: Coccinellidae). Journal of Ethology 12: 63-66.
  29. Tokeshi M., N. Osawa (1994) Niche relations in insect herbivore assemblages. In Lether, S.R., Watt, A.D., Mills, N. J. & Walter, K.F.A. (eds.), Individuals, Population and Patterns in Ecology, pp309-318, Intercept, Hampshire.
  30. Osawa N. (1993) Population field studies of the aphidophagous ladybird beetle Harmonia axyridis PALLAS (Coleoptera:Coccinellidae): life tables and key factor analysis. Researches on Population Ecology 35: 335-348.
  31. Osawa N. (1992a) Effect of pupation site on pupal cannibalism and parasitism of the ladybird beetle Harmonia axyridis PALLAS (Coleoptera: Coccinellidae). Japanese Journal of Entomology 60: 131-135.
  32. Osawa N. (1992b) Sibling cannibalism in the ladybird beetle Harmonia axyridis: fitness consequences for mother and offspring. Researches on Population Ecology 34: 45-55.
  33. Osawa N.(1992c) A Life table of the ladybird beetle Harmonia axyridis PALLAS (Coleoptera: Coccinellidae) in relation to the aphid abundance. Japanese Journal of Entomology 60: 575-579.
  34. Osawa N.(1992d) The effect of shoot growth of Spiraea thunbegii (Rosaceae) on colonization of Aphis spiraecola PATCH (Hemiptera: Aphididae). Applied Entomology and Zoology 27: 557-563.
  35. Osawa N., T. Nishida (1992) Seasonal variation in elytral colour polymorphism in Harmonia axyridis (the ladybird beetle): the role of non-random mating. Heredity 69: 297-307.
  36. Osawa N. (1991) Consequences of sibling cannibalism for the fitness of mother and offspring of the ladybird beetle Harmonia axyridis. In Polgar, L., Chambers, J. R., Dixon, A. F. G. & Hodek, I.(eds.), Behaviour and Impact of Aphidophaga, pp221-225, SPB Academic Publishing bv.,The Hague.
  37. Osawa N. (1989) Sibling and non-sibling cannibalism by larvae of a lady beetle Harmonia axyridis PALLAS (Coleoptera: Coccinellidae) in the field. Researches on Population Ecology 31: 153-160.