The influence of human exploration on the microbial community structure and ammonia oxidizing potential of the Su Bentu limestone cave in Sardinia, Italy.

ABSTRACT: The bacterial diversity in the Su Bentu Cave in Sardinia was investigated by means of 16S rRNA gene-based analysis. This 15 km long cave, carved in Jurassic limestone, hosts a variety of calcite speleothems, and a long succession of subterranean lakes with mixed granite and carbonate sands. The lower level is occasionally flooded by a rising groundwater level, but with only scarce input of organic remains (leaves and charcoal fragments). On the quiet cave pools there are visible calcite rafts, whereas walls are locally coated with manganese deposits. In the drier upper levels, where organic input is much more subdued, moonmilk-a hydrated calcium-magnesium carbonate speleothem-can be found. Relative humidity approaches 100% and the measured mean annual cave air temperature is 14.8°C. Sample

SUBMITTER: Leuko S 

PROVIDER: S-EPMC5507542 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature