10.6084/m9.figshare.1011902.v1 Jakub D Zarsky Jakub D Zarsky Marek Stibal Marek Stibal Andy Hodson Andy Hodson Birgit Sattler Birgit Sattler Morten Schostag Morten Schostag Lars H Hansen Lars H Hansen Carsten S Jacobsen Carsten S Jacobsen Roland Psenner Roland Psenner Sequencing depth and diversity and dominance indices for the selected samples of cryoconite from Aldegondabreen IOP Publishing 2013 Arctic glacier nitrogen cycling supraglacial environments dominance indices prokaryotic microbes valley glacier surface debris geochemical analysis glacier surface cryoconite bird colonies aldegondabreen polymerase chain reactions surface debris particles supraglacial meltwater flow 16 S Environmental Science 2013-09-11 00:00:00 Dataset https://iop.figshare.com/articles/dataset/___Sequencing_depth_and_diversity_and_dominance_indices_for_the_selected_samples_of_cryoconite_from_/1011902 <p><b>Table 5.</b>  Sequencing depth and diversity and dominance indices for the selected samples of cryoconite from Aldegondabreen. </p> <p><strong>Abstract</strong></p> <p>The aggregation of surface debris particles on melting glaciers into larger units (cryoconite) provides microenvironments for various microorganisms and metabolic processes. Here we investigate the microbial community on the surface of Aldegondabreen, a valley glacier in Svalbard which is supplied with carbon and nutrients from different sources across its surface, including colonies of seabirds. We used a combination of geochemical analysis (of surface debris, ice and meltwater), quantitative polymerase chain reactions (targeting the 16S ribosomal ribonucleic acid and <em>amoA</em> genes), pyrosequencing and multivariate statistical analysis to suggest possible factors driving the ecology of prokaryotic microbes on the surface of Aldegondabreen and their potential role in nitrogen cycling. The combination of high nutrient input with subsidy from the bird colonies, supraglacial meltwater flow and the presence of fine, clay-like particles supports the formation of centimetre-scale cryoconite aggregates in some areas of the glacier surface. We show that a diverse microbial community is present, dominated by the cyanobacteria, Proteobacteria, Bacteroidetes, and Actinobacteria, that are well-known in supraglacial environments. Importantly, ammonia-oxidizing archaea were detected in the aggregates for the first time on an Arctic glacier.</p>