Yamashita Lab

Graduate School of Environmental Science, Hokkaido University

 

Youhei Yamashita (PhD)

Associate Professor

 

Faculty of Environmental Earth Science,

Hokkaido University

N10, W5, Kita-ku, Sapporo, Hokkaido 060-0810, Japan

Tel: +81(11)-706-2349

E-mail: yamashiy at ees.hokudai.ac.jp

 

 

[Research keywords]

Biogeochemistry, Carbon Cycle, Oceanography, Limnology, Land-Ocean Interface, Dissolved Organic Matter, Bioavailability, Refractory

 

 

[Research interest]

Dissolved organic matter (DOM) is an important component of the global carbon cycle and represents one of the largest carbon pools on the Earth’s surface. It plays an important role in the biogeochemical cycles, and knowledge of its environmental dynamics in aquatic environments is essential for a better understanding of ecosystem function and carbon cycling. Our group uses quantitative and qualitative approaches, especially optical means, for the characterization of DOM and to assess its environmental dynamics.

 

 

[Current lab member]

Youhei Yamashita (Associate Professor)

Syuji Goto (D3)

Yutaro Mori (M2)

Tetsu Tosaka (M2)

Ariko Seki (M1)

Keisuke Hattori (M1)

Soushi Abe (B4)

Toshiyuki Takekuma (B4)

   


 

[Selected publications]

Nakane, M., T. Ajioka, and Y. Yamashita (2017) Distribution and sources of dissolved black carbon in surface waters of the Chukchi Sea, Bering Sea, and the North Pacific Ocean. Frontiers in Earth Science, 5, 34.


Goto, S., Y. Tada, K. Suzuki, and Y. Yamashita (2017) Production and reutilization of fluorescent dissolved organic matter by a marine bacterial strain, Alteromonas macleodii. Frontiers in Microbiology, 8, 507.


Tanaka, K., K. Kuma, K. Hamasaki, and Y. Yamashita (2014) Accumulation of humic-like fluorescent dissolved organic matter in the Japan Sea. Scientific Reports, 4, 5292.


Yamashita, Y., N. Maie, H. Briceño and R. Jaffé (2010) Optical characterization of dissolved organic matter in tropical rivers of the Guayana Shield, Venezuela. Journal of Geophysical Research 105: G00F10.

 

Yamashita, Y. and R. Jaffé (2008) Characterizing the interactions between trace metal and dissolved organic matter using excitation-emission matrix and parallel factor analysis. Environmental Science and Technology 42: 7374-7379.

 

Yamashita, Y. and E. Tanoue (2008) Production of bio-refractory fluorescent dissolved organic matter in the ocean interior. Nature Geoscience 1: 579-582.

 

Yamashita, Y., R. Jaffé, N. Maie and E. Tanoue (2008) Assessing the dynamics of dissolved organic matter (DOM) in coastal environments by excitation emission matrix fluorescence and parallel factor analysis (EEM-PARAFAC). Limnology and Oceanography 53: 1900-1908.

 


CVhttp://geos.ees.hokudai.ac.jp/yamashita/CV_Yamashita.pdf
Graduate School of Environmental Science, Hokkaido Universityhttp://www.ees.hokudai.ac.jp/