|| 要旨トップ | ESJ62 シンポジウム 一覧 |||日本生態学会第62回全国大会 (2015年3月、鹿児島) 講演要旨
シンポジウム S10 -- 3月21日 9:00-12:00 D会場
Recent studies suggest that freshwater ecosystems are the primary source of atmospheric methane which is 25-times more effective than carbon dioxide as a greenhouse gas. This estimation, however, could be biased because methane emission from tropical lakes is still unknown. Methane oxidizing bacteria (MOB) which assimilate dissolved methane aerobically or anaerobically have great impacts on methane cycling in lake ecosystems. Methanotrophic food webs (MFWs), in which methane-derived carbon is trophically transferred through the MOB and embedded within a food web, function as a carbon recycling unit in lake ecosystems. The understanding of controlling mechanisms for the MFWs therefore will help us to estimate global methane flux with accuracy. In boreal and temperate lakes, ecology, physiology and phylogeny of the MOB are well studied, whereas there is limited knowledge on those in sub-tropical and tropical lakes. Here we introduce our international collaborative research on MFWs in Fei-Tsui Reservoir (FTR), Taipei, which is characteristic of both sub-tropical and tropical lakes, depending on climate condition.
Commentators: Tomoya Iwata (Yamanashi Univ.), Taichi Yokokawa (Ehime Univ.)
[S10-1] What’s the methanotrophic food web?
[S10-2] CH4 dynamics in a subtropical reservoir under a changing climate
[S10-3] Vertical and seasonal profiles of methane oxidizing bacteria (MOB) in FTR
[S10-4] Methanotrophic food webs based on fatty acid biomarker
[S10-5] Summer hypoxia determines the coupling of methanotrophic and pelagic foodweb