The Results of Our Investigation on the Microbial Community of the High-Temperature Dagang Oilfield (P.r. China) Are Summarized. Detailed Experimental Data Are Provided on Syntrophic Acetate Degradation by Thermophilic Associations, on the Isolation of Pure Cultures From These Associations, Their Physiologicalcharacteristics, and Reconstruction of Microbial Interactions During Acetate Degradati…