Bacteriohopanepolyols in tropical soils and sediments from the Congo River catchment area |
| |
Institution: | 1. State Key Laboratory of Marine Environmental Sciences, Xiamen University, Xiamen 361101, China;2. Institute of Marine Microbes and Ecospheres, Xiamen University, Xiamen 361101, China;3. State Key Laboratory of Marine Geology, Tongji University, Shanghai, China |
| |
Abstract: | The Congo River basin drains the second largest area of tropical rainforest in the world, including a large proportion of pristine wetlands. We present the bacteriohopanepolyol (BHP) inventory of a suite of tropical soils and, from comparison with published data, propose some initial ideas on BHP distribution controls. Strong taxonomic controls on BHP production are evident in wetland sediments. Dominant within the suite were 35-aminobacteriohopane-31,32,33,34-tetrol (aminotetrol) and 35-aminobacteriohopane-30,31,32,33,34-pentol (aminopentol), indicating aerobic methanotrophy. A narrow range and low mean relative abundance of 30-(5′-adenosyl)hopane (adenosylhopane) and related compounds, collectively termed “soil marker” BHPs, were observed in Congo soils (mean 17%, range 7.9–36% of total BHPs, n = 22) compared with literature data from temperate surface soils and Arctic surface soils (mean 36%, range 0–66% of total BHPs, n = 28) suggesting a greater rate of conversion of these BHP precursors to other structures. |
| |
Keywords: | Bacteriohopanepolyols Adenosylhopane Tropical soil Methanotrophic bacteria Congo Wetland |
本文献已被 ScienceDirect 等数据库收录! |
|