Department of Biological Oceanography, Royal Netherlands Institute for Sea Research (NIOZ), 8 PO Box 50, NL, 1790 AB, Den Burg, The Netherlands.
Section for Marine Biology, University of Copenhagen, Strandpromenaden 5, 3000, Helsingør, Denmark.
Environ Microbiol. 2015 Aug;17(8):2910-21. doi: 10.1111/1462-2920.12835. Epub 2015 Apr 15.
Ring-like structures, 2.0-4.8 cm in diameter, observed in photosynthetic microbial mats on the Wadden Sea island Schiermonnikoog (the Netherlands) showed to be the result of the fungus Emericellopsis sp. degrading the photoautotrophic top layer of the mat. The mats were predominantly composed of cyanobacteria and diatoms, with large densities of bacteria and viruses both in the top photosynthetic layer and in the underlying sediment. The fungal attack cleared the photosynthetic layer; however, no significant effect of the fungal lysis on the bacterial and viral abundances could be detected. Fungal-mediated degradation of the major photoautotrophs could be reproduced by inoculation of non-infected mat with isolated Emericellopsis sp., and with an infected ring sector. Diatoms were the first re-colonizers followed closely by cyanobacteria that after about 5 days dominated the space. The study demonstrated that the fungus Emericellopsis sp. efficiently degraded a photoautotrophic microbial mat, with potential implications for mat community composition, spatial structure and productivity.
在荷兰瓦登海的席默尔恩尼克岛的光合作用微生物垫中观察到直径为 2.0-4.8 厘米的环状结构，结果表明这是真菌Emericellopsis sp.降解微生物垫的光自养顶层的结果。这些垫子主要由蓝藻和硅藻组成，在顶部光合层和下面的沉积物中都有大量的细菌和病毒。真菌的攻击清除了光合层；然而，真菌裂解对细菌和病毒丰度的影响并不显著。通过接种分离的 Emericellopsis sp. 和感染的环状区域，可以重现真菌介导的主要光自养生物的降解。硅藻是第一批再殖民者，紧随其后的是大约 5 天后占主导地位的蓝藻。该研究表明，真菌 Emericellopsis sp.有效地降解了光合微生物垫，这可能对垫状群落组成、空间结构和生产力产生影响。
