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Hokkaido University issued a joint press release regarding the research conducted by Prof. Tsutom Hiura (Division of Biosphere Science) and his collaborators of University of Tsukuba and Forestry and Forest Products Research Institute.

This research outcome is published in Biological Conservation.

Please visit links below for more details.
Research Press Release (PDF in Japanese)
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GSES Photography Contest 2017

カテゴリ : 
Promenade
執筆 : 
 2018/3/1 12:20
環境科学院では、学院での研究活動について構成員相互に、また広く社会一般に知っていただくことを目的に、環境科学院写真コンテストを毎年実施しています。

このコンテストでは、環境科学院・地球環境科学研究院に所属する教員および学生、PD等を対象に、研究活動中の風景や研究対象、 実験や作業風景、活動スナップなど環境科学院での研究にかかわる写真を幅広く募集し、環境科学院広報委員会での審査により各賞を選出いたします。

今年は15名から53作品のご応募を頂き、厳正な審査の結果、以下の7点が2017年の受賞作品に選出されました。受賞作品は、環境科学院正面ロビーに展示されます。また、応募作品は環境科学院紹介パンフレット等の広報写真として掲載される予定です。


最優秀賞
「さあ、行こう」山本淳博氏(地球圏科学、M2)
『アルゼンチン・ペリートモレノ氷河で先輩と2人きりの観測の様子です。GPSなどを用いて氷河の上を歩き回りました。』








優秀賞
「Mighty step into vast tundra」Shakhmatov Ruslan 氏 (地球圏科学、D1)
『Fieldwork in tundra requires covering of long distances over moist terrain on foot. Stunning view. (Chokurdakh, Russia)』







優秀賞
「雪中松柏」松下 侑未 氏 (地球圏科学、M2)
『トマムに設置してある気象観測測器のメンテナンス中のひとコマ』











優秀賞
「トゥスニンケ—願い事の神様—」渡辺 充 氏 (生物圏科学、M2)
『木の実を食べる様子が願い事をしているように見える事から、エゾリスはアイヌ語でトゥスニンケカムイと呼ばれていたようです。』







カバーフォト賞
「Walking along the beach with the sea wind」ZHOU JINGHUI 氏 (環境起学、M2)
『Last year, I took the course of field work integrated environmental geography. We went to Tokachi and the beach near the Tokachi. In the photo we are looking for a good point to measure with the simple measuring equipment.』





カバーフォト賞
「寒い冬に備えて」内田 健太 氏 (生物圏科学、D3)
『秋のエゾリスは寒い冬に備えてご多忙です。いつもは樹上にいるリスもこの時は地面を忙しく走り回ります。暖かそうな巣材です。』








カバーフォト賞
「真空系」藤元 もも 氏 (環境物質科学、M1)
『真空系のメンテナンスをしている様。』
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The tricarboxylic acid (TCA) cycle is a key metabolic mechanism essential for most organisms. The research group that includes Prof. Yoshito Chikaraishi (Division of Earth System Science) revealed that a thermophilic bacterium isolated from a hydrothermal field in the Southern Okinawa Trough has a novel tricarboxylic acid (TCA) cycle, possibly the most primitive form yet known.

This research outcome is published in Science.

Please visit links below to view the press release.
Research Press Release (English ver.)
Research Press Release (PDF in Japanese)
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The research group lead by Prof. Takashi Noda (Division of Biosphere Science) developed a framework for quantifying the relationship between intensity and severity of disturbance impacts across types of events and species.

Natural disturbances can decrease population sizes of organisms. To date, however, there is no comprehensive framework to compare the impacts on populations between disturbances with different properties, such as typhoon, cold wave, and tsunami, as well as among different species. Prof. Noda’s group compared impacts of various disturbances on different species with those of 2011 Tohoku earthquake tsunami on rocky intertidal organisms using the new framework they developed. Contrary to expectations, the results showed that the impacts of the tsunami on rocky intertidal organisms was lower than that of other disturbances like bomb cyclone, although disturbance intensity of the tsunami was extremely higher than that of other disturbances.

The framework Prof. Noda’s group developed will contribute to evaluate and predict risks of natural disturbances.

This research outcome is published in Scientific Reports.

Please visit links below to view the press release (Japanese ver. only).
Research Press Release (PDF)
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The research group that includes Assist. Profs. Yoshinori Iizuka and Sumito Matoba, Assoc. Prof. Osamu Seki (Institute of Low Temperature Science), and Ryoto Furukawa who has finished our master’s course (Division of Earth System Science) measured the major ion fluxes in a 90 m ice core drilled from a southeast Greenland dome and presented the records of ion fluxes for the past 60 years at unprecedented high time resolution. They found that the decadal trend of NO3- flux differs from the decreasing trend of anthropogenic NOx emissions. Although NOx emissions have shown a decreasing trend since 1970–80's, the NO3- flux in the ice core was the highest in the 1990's and it was higher after 2000 than that in the 1960-80’s. The present result suggests that Arctic NO3- flux remains high despite NOx emission controls by surrounding countries.

These research outcomes are published as two papers in Journal of Geophysical Research: Atmospheres.

Please visit links below to view the press release.
Research Press Release (English ver.)
Research Press Release (PDF in Japanese)
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An international research group that includes Assoc. Prof. Masanori Ochiai (Division of Biosphere Science) first identified a receptor for the growth-blocking peptide (GBP) cytokine in the fruit fly Drosophila melanogaster, a routine model for analysis of cytokine signaling pathways in higher animals. The GBP is a multifunctional cytokine that regulates immunity and metabolism in response to various environmental stresses.
They found that the receptor not only plays important roles in environmental stress responses but also influences lifespan of the fly. The present study provides fundamental knowledge on health and longevity.

This research outcome is published in the PNAS.

Please visit links below to view the press release (Japanese ver. only).
Research Press Release (PDF)
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Boreal forests in Russian Far East are frequently subjected to fire disturbance, which emit large quantities of carbon dioxide (CO2) by burning trees.
An international research group that consists of Assist. Prof. Makoto Kobayashi (Division of Biosphere Science) and researchers of Russian Academy of Sciences provided the first field evidence that fire-derived charcoal may enhance the decomposition of fine larch roots died in sediment. This finding suggests that forest fires can affect CO2 release from boreal forests even after the fires.

This research outcome is published in Soil Biology & Biochemistry.

Please visit links below to view the press release (Japanese ver. only).
Research Press Release (PDF)
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Decades of research have shown that ecosystems are not “stand-alone” entities; instead, ecosystems are linked each other through cross-system movements of materials such as nutrients, detritus, and organisms, which are called spatial subsidies. Aquatic–terrestrial ecosystem linkage is one of the well-known linkage, but less is known about how much effect changes in an aquatic system have on the adjacent terrestrial ecosystem. A research group that includes Assoc. Prof. Junjiro N. Negishi and a Ph.D. student, Nozomi Watanabe (Division of Environmental Science Development) quantified how riverine productivity (donor system) mediates terrestrial food web interactions through spatial subsidies to simplified gravel bar communities. Their results indicated that higher algal biomass in aquatic systems led to increased supplies of emerging aquatic insects. The results also showed that the increased supplies were associated with greater densities of terrestrial consumers and enhanced consumption rates of supplemental in situ prey on gravel bars. This study highlights the potential of donor productivity to drive cascading biotic interactions across coupled ecosystems.

This research outcome is published in Ecosystems.

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Research Press Release (PDF)
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Course Feedback Survey Results for the 2016 academic year

カテゴリ : 
Promenade
執筆 : 
 2017/9/19 14:30
Here are the results of feedback surveys about the courses conducted in the 2016 academic year.
・Evaluation and comments (only in Japanese)
・Survey Summary (only in Japanese)
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We can see colored snow during the melt season in alpine snowfields. This coloring is known to be due to pigments of snow algae, which can grow even under low temperature. On the other hand, whole microbial community in colored snow have little understanding. A research group that includes Assist. Prof. Mia Terashima, Kazuhiro Umezawa, a Ph.D. student, Assist. Prof. Hisaya Kojima, and Prof. Manabu Fukui (Division of Biosphere Science) analyzed the microbial community of green and red-colored snow containing snow algae from Mount Asahi, Japan. They found that bacteria belonging to the subphylum Betaproteobacteria were frequently detected in both green and red snow. Further results of this paper suggest that the bacteria can utilize the available carbon source in algae-rich environments and may in turn promote algal growth.

This research outcome is published in Frontiers in Microbiology.

Please visit links below to view the press release (Japanese ver. only).
Research Press Release (PDF)
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Graduate School of Environmental Sceince, Hokkaido University