2 pH 0 12 H2S paeM'W PIne 3 52ot1irekaegy时leorgns1ie 6 7 8 9 pH Microprofiles of O2, H,S and pH in a 200 400 600 800 1000 hot spring 02 or H2S (M) microbial mat Figure 18-19b Brock Biology of Microorganisms 11/e 2006 Pearson Prentice Hall,Inc. Activity research in microbial mats(layered microbial communities)微生物垫（多层次微生物生态系统)Microprofiles of O2 , H2S and pH in a hot spring microbial mat Activity research in microbial mats (layered microbial communities)微生物垫（多层次微生物生态系统）