Studies on the year-round production and quality improvement of baby-leaf vegetables
(ベビーリーフの周年生産と品質改善に関する研究)
〈水圏生物学コース〉
大槻 真友子 Mayuko Ohtsuki
Development of non-invasive techniques to
measure testosterone in the northern fur seal (Callorhinus ursinus)
(キタオットセイにおけるテストステロンの非侵襲的な測定手法の開発)
〈動物生態学コース〉
大久保 祐作 Yusaku Ohkubo
On the phylogenetic comparative analysis of directional evolution by Approximate Bayesian Computation
(近似ベイズ計算を用いた方向性進化の分析について)
〈分子生物学コース〉
船川 寛矢 Hiroya Funakawa
Studies on improvement of tolerance to boron deficiency and toxicity in plants
(植物におけるホウ素欠乏・過剰耐性付与の研究)
〈森林圏フィールド科学コース〉
山崎 遥 Haruka Yamazaki
重機を用いた天然更新補助作業における表層土壌残存が実生の初期定着に及ぼす影響
(Influences of leaving surface soil in assisted natural regeneration using heavy machinery on early seedling establishment)
【3月修了】
〈動物生態学コース〉
渥美 圭佑 Keisuke Atsumi
Roles of male mate choice and its heterogeneity in reproductive isolation among mutually ornamented fishes
(オスによる配偶者選択と個体差が繁殖隔離に及ぼす影響:雌雄共通装飾をもつウグイでの検証)
〈耕地圏科学コース〉
久保田 明人 Akito Kubota (論文博士)
Implementation of GISH (genomic in situ hybridization) and DNA marker techniques for Festulolium breeding (GISHおよびDNAマーカー技術のフェストロリウム育種への利用)
田辺 智樹 Tomoki Tanabe (論文博士)
サラブレッド種当歳馬の昼夜放牧飼養管理に関する栄養学的・行動学的研究 (Nutritional and behavioral studies on grazing management for whole-day stocked Thoroughbred foals)
〈森林圏フィールド科学コース〉
鍵谷 進乃介 Shinnosuke Kagiya
Ecological consequences of genetic variation in a foundation species on above- and below-ground communities in the field (地上部-地下部群集への生態系基盤種の遺伝的変異の影響に関する生態学的研究)
(Relationship between community structure of flower visiting insects and flowering structure of plant communities along the forest-alpine ecotone in a cool-temperate ecosystem)
主査:工藤 岳
副査:甲山 隆司、露崎 史朗、高田 壮則
日時:2/1(金) 14:45~
発表者:福井 翔
論文題目:Mechanisms of sustainable introgressive hybridization between native white-spotted charr (Salvelinus leucomaenis) and non-native brook trout (S. fontinalis)
(外来カワマスと在来アメマスにおける浸透交雑の存続機構)
主査:小泉 逸郎
副査:高田 壮則、野田 隆史、森田 健太郎(北海道区水産研究所)
日時:2/1(金) 16:30~
発表者:内田 健太
論文題目:The town squirrel and the country squirrel : multiple behavioral comparisons in Eurasian red squirrel between two environments
講演タイトル:Strategies and resource acquisition of ectomycorrhizal fungi and wood decay fungi in forest ecosystems
(In English)
We will have a seminar by Dr. Erik Hobbie. He studies fungal functioning by using nitrogen dynamics. I hope many people come and join us. Polycom from branch office is available. I am glad if you inform me befor when you want to attend via Polycom (we will connect to HD1).
Date: 1 October 15:00~16:00
Place: Large conferece room (1st floor) in Field Science Center for Northern Biosphere (Experiment Farm)
Title: Strategies and resource acquisition of ectomycorrhizal fungi and wood decay fungi in forest ecosystems
Abstract:
We present two case studies of fungal functioning in forest ecosystems. In the first, we investigated functional differences in six taxa of decay fungi during a long-term log decomposition study (Oregon, USA) by studying elemental, isotopic, and compositional patterns in wood, cellulose, and sporocarps. Partitioning between protein and non-protein pools in mycelia prior to sporocarp formation controlled sporocarp δ15N relative to N sources. Radiocarbon measurements separated fungi into heartwood colonizers (Fomitopsis and Hericium, ~60-year-old carbon) and sapwood colonizers (Mycena (7 years), Hypholoma (11 years), and Trametes (11 years). Mycena and Hypholoma appeared to assimilate some 13C-enriched sucrose in sapwood rather than just cellulose. The six taxa varied widely in their chemical composition, as assessed by pyrolysis GC-MS; these compositional differences correlated with functional growth strategies. From these measurements, we improved the quantitative and conceptual understanding of functional differences of wood decay fungi. In the second study, we assessed how nitrogen (N) availability affected ectomycorrhizal functioning in two long-term (6-40 years) N addition experiments in Pinus sylvestris stands in Sweden. Sporocarp production declined dramatically with N fertilization but recovered slowly after fertilization stopped. Both sporocarp C/N and soil C/N increased with fertilization, implying that N uptake per unit fungal growth increased and then declined after fertilization had stopped. Fungal and soil d15N patterns across treatments identified fungal N sources, with N acquisition primarily from the S horizon for Paxillus involutus and Suillus variegatus, from the F horizon for four Cortinarius taxa and Lactarius rufus, and from the H horizon for Cortinarius traganus and Russula aeruginea. Taxa with proteolytic capabilities were particularly sensitive to N fertilization. These analyses illustrated that responses of fungal taxa across these fertilization gradients depended on the horizon of N acquisition and on N acquisition strategies.
A Lecture on diversity biology in English is scheduled in the coming term. All graduate students are welcome.
# Cross-Division Lecture
# Open lecture for all graduate schools
Primer of Diversity Biology
“Biosphere Diversity Science”
Room D102, Graduate School of Environmental Science
14:45 – 16:15, Wednesday and Friday
From October 3 to November 28
(Note: no class on Nov. 21, Nov. 23)
[Objectives]
Biosphere covers heterogeneous substrates on Earth. This lecture provides
overview of various ecosystems in land and ocean, by around a dozen lecturers in Graduate School of Environmental Science dealing with unique target ecosystem and biological communities.
Lecturers focus on (1) biodiversity, (2) ecosystem function, and (3) their response to environmental change.caused by human activities.
[Goals]
Through this lecture, students are expected to achieve a whole-planet scale understanding of unique Earth biota, of which heterogeneity and diversity. It thus allows to image the ongoing effect of climate change on the ecosystem functioning and biodiversity on the Earth.
論文題目:Using recombinant E. coli displaying surface heavy metal binding proteins for removal of Pb2+ from contaminated water
(汚染水からの鉛除去のための表在性重金属結合タンパク質提示組換え大腸菌の利用)
主査:山崎 健一
副査:森川 正章、鈴木 仁
日時:7/19(木)15:00~
場所:D201
発表者:相原 いづみ
論文題目:Boron-dependent posttranscriptional regulation of a borate transporter BOR1 and its physiological significance in Arabidopsis thaliana
(シロイヌナズナにおけるホウ酸輸送体BOR1のホウ素濃度依存的な転写後制御とその生理的意義)
主査:三輪 京子
副査:森川 正章、山口 良文、山崎 健一、佐藤 長緒(大学院理学研究院)
日時:7/20(金)13:30~
場所:D201
発表者:鈴木 将太
論文題目:Evolutionary ecological study on lineage longevity of Hexagrammos hemiclonal hybrids: two-way backcrossing, recombination through occasional generation changes and synthesis of renewed hemiclone