Bacterial taxa-area and distance-decay relationships in marine environments.
Bottom Line: Noticeably, bacterial TAR and DDR patterns did not correlate with each other both within and across ecosystem types, suggesting that (i) TAR cannot be directly derived from DDR and (ii) TAR and DDR may be influenced by different ecological factors.Nevertheless, we found marine bacterial TAR and DDR to be steeper in ecosystems associated with high environmental heterogeneity or spatial isolation, namely marine sediments and coastal environments compared with pelagic ecosystems.Hence, our study provides information on macroecological patterns of marine bacteria, as well as methodological and conceptual insights, at a time when biodiversity surveys increasingly make use of high-throughput sequencing technologies.
Affiliation: HGF-MPG Joint Research Group on Deep Sea Ecology and Technology, Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, Bremen, D-28359, Germany; CNRS, Université Paul Sabatier, UMR5174 EDB, 118 route de Narbonne, Toulouse, F-31062, France.Show MeSH
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Mentions: Overall, sequencing depth (i.e. the number of DNA amplicons sequenced) per sample affected the variability of z and β very weakly, and only when it was shallow (<500 sequences; Fig.3a, c). Increasing sequencing depth slightly reduced both z and /β/ regardless of ecosystem type, a feature less pronounced in surface- and deep-sea waters. Finally, z and /β/ started to stabilize at ∼4000 sequences and were always significantly larger in coastal sediments (W = 0, Holm-corrected P << 0.0001) as compared to other ecosystems.
Affiliation: HGF-MPG Joint Research Group on Deep Sea Ecology and Technology, Max Planck Institute for Marine Microbiology, Celsiusstrasse 1, Bremen, D-28359, Germany; CNRS, Université Paul Sabatier, UMR5174 EDB, 118 route de Narbonne, Toulouse, F-31062, France.