TY - JOUR A1 - Kashiyama, Y. A1 - Ogawa, N. O. A1 - Shiro, M. A1 - Tada, R. A1 - Kitazato, H. A1 - Ohkouchi, N. T1 - Reconstruction of the biogeochemistry and ecology of photoautotrophs based on the nitrogen and carbon isotopic compositions of vanadyl porphyrins from Miocene siliceous sediments JO - Biogeosciences J1 - BG VL - 5 IS - 3 SP - 797 EP - 816 Y1 - 2008/05/15 PB - Copernicus Publications SN - 1726-4170 UR - http://www.biogeosciences.net/5/797/2008/ L1 - http://www.biogeosciences.net/5/797/2008/bg-5-797-2008.pdf ER -