Caves are extreme and specialised habitats for terrestrial life that sometimes contain moonmilk, a finegrained pastelike secondary mineral deposit that is found in. Microbial Community Diversity of Moonmilk Deposits at Ballynamintra Cave, Co. Waterford, Ireland. Caves are extreme and specialised habitats for terrestrial life that sometimes contain moonmilk, a fine grained paste like secondary mineral deposit that is found in subterranean systems worldwide. While previous studies have investigated the possible role of microorganisms in moonmilk precipitation, the microbial community ecology of moonmilk deposits is poorly understood. Bacterial and fungal community structure associated with four spatially isolated microcrystalline, acicular calcite moonmilk deposits at Ballynamintra Cave S. Ireland was investigated during this study. Statistical analyses revealed significant differences in microbial activity, number of bacterial species, bacterial richness and diversity, and fungal diversity Shannons diversity among the moonmilk sites over an area of approximately 2. Bray Curtis Similarity Index Software Llc SearchHowever, the number of fungal species and fungal community richness were unaffected by sampling location. SIMPER analysis revealed significant differences in bacterial and fungal community composition among the sampling sites. These data suggest that a rich assemblage of microorganisms exists associated with moonmilk, with some spatial diversity, which may reflect small scale spatial differences in cave biogeochemistry.
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