| Co-Investigator(Kenkyū-buntansha) |
植竹 淳 北海道大学, 北方生物圏フィールド科学センター, 准教授 (40455473)
瀬川 高弘 山梨大学, 大学院総合研究部, 講師 (90425835)
米澤 隆弘 広島大学, 統合生命科学研究科(生), 教授 (90508566)
幸島 司郎 京都大学, 野生動物研究センター, 名誉教授 (60183802)
服部 祥平 東京工業大学, 物質理工学院, 研究員 (70700152)
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| Budget Amount *help |
¥45,110,000 (Direct Cost: ¥34,700,000、Indirect Cost: ¥10,410,000)
Fiscal Year 2023: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2022: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2021: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2020: ¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
Fiscal Year 2019: ¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000)
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| Outline of Final Research Achievements |
Recent melt acceleration of glaciers worldwide is caused not only by climate warming but also by microbial surface darkening of snow and ice. We conducted glacier surveys and analyzed snow and ice samples to explore the reason of recent expansion of the microbial blooming on glaciers. We developed a numerical algal growth model that reproduces seasonal algal blooming and simulated successfully the algal blooming in global scale. Pigments and DNA analyses revealed that the pigments in algae vary greatly depending on the species and season, and that functional genes of phototrophs differs significantly in between Asia and the Arctic. We also discovered the presence of chytrid fungus infecting the algae, which also possibly control the algal blooms. Results suggest that the expansion of the microbial blooming is caused not only by changes in the physical and chemical conditions but also by changes in interspecific relationships within the microbial community on the glaciers.
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