Teeling Hanno, Fuchs Bernhard M, Bennke Christin M, Krüger Karen, Chafee Meghan, Kappelmann Lennart, Reintjes Greta, Waldmann Jost, Quast Christian, Glöckner Frank Oliver, Lucas Judith, Wichels Antje, Gerdts Gunnar, Wiltshire Karen H, Amann Rudolf I
Max Planck Institute for Marine Microbiology, Bremen, Germany.
Biologische Anstalt Helgoland, Alfred Wegener Institute for Polar and Marine Research, Helgoland, Germany.
Elife. 2016 Apr 7;5:e11888. doi: 10.7554/eLife.11888.
A process of global importance in carbon cycling is the remineralization of algae biomass by heterotrophic bacteria, most notably during massive marine algae blooms. Such blooms can trigger secondary blooms of planktonic bacteria that consist of swift successions of distinct bacterial clades, most prominently members of the Flavobacteriia, Gammaproteobacteria and the alphaproteobacterial Roseobacter clade. We investigated such successions during spring phytoplankton blooms in the southern North Sea (German Bight) for four consecutive years. Dense sampling and high-resolution taxonomic analyses allowed the detection of recurring patterns down to the genus level. Metagenome analyses also revealed recurrent patterns at the functional level, in particular with respect to algal polysaccharide degradation genes. We, therefore, hypothesize that even though there is substantial inter-annual variation between spring phytoplankton blooms, the accompanying succession of bacterial clades is largely governed by deterministic principles such as substrate-induced forcing.
碳循环中一个具有全球重要性的过程是异养细菌对藻类生物质的再矿化，这在大规模海藻爆发期间尤为明显。这种爆发会引发浮游细菌的二次爆发，这些细菌由不同细菌进化枝的快速演替组成，最突出的是黄杆菌纲、γ-变形菌纲和α-变形菌纲玫瑰杆菌进化枝的成员。我们连续四年对北海南部（德国湾）春季浮游植物爆发期间的这种演替进行了调查。密集采样和高分辨率分类分析使得能够检测到直至属水平的重复模式。宏基因组分析还揭示了功能水平上的重复模式，特别是关于藻类多糖降解基因的模式。因此，我们假设，尽管春季浮游植物爆发之间存在很大的年际变化，但伴随的细菌进化枝演替在很大程度上受底物诱导强迫等确定性原则支配。
