Promenadeカテゴリのエントリ

[Press Release] Boron-dependent translational suppression of the borate exporter BOR1 contributes to the avoidance of boron toxicity

Hokkaido University issued a press release regarding the research conducted by the research group led by Assoc. Prof. Kyoko Miwa and Izumi Aibara, a Ph.D. student (Division of Biosphere Science).

This research outcome is published in Plant Physiology.

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Research Press Release (PDF in Japanese)

[Press Release] Low ocean-floor rises regulate subpolar sea surface temperature by forming baroclinic jets

Hokkaido University issued a joint press release regarding the research conducted by the research group led by Prof. Fumio Mitsudera (Division of Earth System Science).

This research outcome is published in Nature Communications.

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Research Press Release (English ver.)
Research Press Release (PDF in Japanese)

[Press Release] Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years

Hokkaido University issued a joint press release regarding the research conducted by the international research group that includes Assist. Prof. Yoshinori Iizuka (Division of Earth System Science).

This research outcome is published in Nature Communications.

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Research Press Release (PDF in Japanese)

[Press Release] Predicting an insect community structure based on genomic variation in a tree species

Hokkaido University issued a press release regarding the research conducted by Shinnosuke Kagiya, a Ph.D. student of Division of Biosphere Science, and Assoc. Prof. Shunsuke Utsumi (Division of Biosphere Science) and their collaborators.

This research outcome is published in Molecular Ecology, a top journal in evolutionary biology/ecology.

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Research Press Release (English ver.)
Research Press Release (PDF in Japanese)

[Press Release] Landscape genetics of a threatened maple: Implications for restoring riparian forest connectivity

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.

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Research Press Release (PDF in Japanese)

[Press Release] Discovery of a primordial metabolic system that gives us a glimpse of the origin of life on earth

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)

[Press Release] Impacts of the 2011 Tohoku earthquake tsunami on rocky intertidal community was lower than expected

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)

[Press Release] Arctic NO3− flux remains high despite NOx emission controls

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.

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Research Press Release (English ver.)
Research Press Release (PDF in Japanese)

[Press Release] Cytokine signaling through Drosophila Mthl10 ties lifespan to environmental stress

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)

[Press Release] Fire-derived charcoal might promote fine root decomposition in boreal forests

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)

Graduate School of Environmental Sceince, Hokkaido University