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入学希望の方一般・社会人の方研究者の方同窓生の方在学生の方教職員の方 日本語 (Japanese) Graduate School of Life Sciences, Tohoku University Access sitemap Link Tohoku University HOMEAbout UsAbout UsMessage from the DeanOrganizationMovieResearchLaboratories Department of Integrative Life Sciences Department of Ecological Developmental Adaptability Life Sciences Department of Molecular and Chemical Life SciencesResearchAwardEducationDegree ProgramsCourseSyllabusScheduleStudent LifeAdmissionAdmission InformationApplicationExamination Schedule and Application GuidelinesInformation Session(2024)Admission and Tuition FeesAdmission PolicyVoices from Graduates and Current StudentsAdmissions Q&AInquiries about Entrance ExaminationsFinancial SupportFor StudentsGraduate School&＃039;s Message Board for Students Information about Completion and Advancement to the Doctoral Course ProceduresCertificatesAbout Issuance of Various CertificatesNotice Regarding the Suspension of Operation of the Automatic Certificate Issuing MachinesLeave of absence/withdrawal from universityCampus Life, Various consultation servicesContactAccessLinkSitemapInformationAdmissionResearchAwardSeminarJobNewsAnnouncementOther MENU HOMEAbout UsAbout UsMessage from the DeanOrganizationMovieResearchLaboratoriesResearchAwardEducationDegree ProgramsCourseSyllabusScheduleStudent LifeAdmissionAdmission InformationApplicationExamination Schedule and Application GuidelinesInformation Session(2024)Admission and Tuition FeesAdmission PolicyVoices from Graduates and Current StudentsAdmissions Q&AInquiries about Entrance ExaminationsFinancial SupportFor StudentsGraduate School&＃039;s Message Board for Students Information about Completion and Advancement to the Doctoral Course ProceduresCertificatesLeave of absence/withdrawal from universityCampus Life, Various consultation servicesContactAccessLinkSitemapInformationAdmissionResearchAwardSeminarJobNewsAnnouncementOther 日本語 (Japanese) CLOSE Graduate School of Life Sciences, Tohoku University. Field Ecological Developmental Adaptability Life Sciences :Ecological Dynamics Research HOME Research Researcher JAPANESE Professor HIKOSAKA Kouki Campus Aobayama campus Laboratory Functional Ecology Tel +81-22-795-7735 E-mail hikosaka＠tohoku.ac.jp Website http://www.biology.tohoku.ac.jp/lab-www/hikosaka_lab// ResearcherID http://www.researcherid.com/rid/A-5415-2013 Google scholar https://scholar.google.co.jp/citations?user=KBrZzdoAAAAJ&hl=ja&oi=ao Career 1990 BA in Science, Tohoku University 1995 PhD (Science), The University of Tokyo 1995-1999 Assistant Professor, Tohoku University 1999-2010 Associate Professor, Tohoku University 2010- Professor, Tohoku University Selected Publications Access the following website for other works: http://www.biology.tohoku.ac.jp/lab-www/hikosaka_lab/hikosaka/index.html Activities in Academic Societies Ecological Society of Japan, The Botanical Society of Japan, The Japanese Society of Photosynthesis Research Recent Activities One of our recent major themes is plant responses to increases in atmospheric CO2 concentration, global warming and other environmental changes. CO2 spring is one of unique system to study long-term response of plants to elevated CO2, because plants might have exposed to elevated CO2 over generations. We have found that plants inhabiting in high CO2 area around the springs have different traits from plants inhabiting normal CO2 area. This suggests that elevated CO2 promotes plant microevoution. Such evolutionary changes in plant traits may happen in a future high-CO2 world. The photograph shows the measuring of the photosynthesis rate around a CO2 spring, which emitts volcanic gasses that contains high concentration of CO2. Arround the spring, the ecosystem is exposed to high CO2 concentration. The plant treated in the photograph had been exposed to approximately 2,800 ppm CO2, roughly seven times the normal amount in the atmosphere. Message to Students In biology, we can raise two types of questions to a phenomenon. One is "how"; namely mechanisms responsible for the phenomenon. The other is "why"; namely ecological significance of the phenomenon. The latter is closely related to evolution because a trait of organisms is a result of natural seletion; it might be selected because it has some benefit to survive, grow and reproduce in the habitat. We are interested both "how" and "why". 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