PMID- 34545673 OWN - NLM STAT- MEDLINE DCOM- 20220317 LR - 20221207 IS - 1462-2920 (Electronic) IS - 1462-2912 (Print) IS - 1462-2912 (Linking) VI - 23 IP - 11 DP - 2021 Nov TI - Unmasking photogranulation in decreasing glacial albedo and net autotrophic wastewater treatment. PG - 6391-6404 LID - 10.1111/1462-2920.15780 [doi] AB - In both natural and built environments, microbes on occasions manifest in spherical aggregates instead of substratum-affixed biofilms. These microbial aggregates are conventionally referred to as granules. Cryoconites are mineral rich granules that appear on glacier surfaces and are linked with expanding surface darkening, thus decreasing albedo, and enhanced melt. The oxygenic photogranules (OPGs) are organic rich granules that grow in wastewater, which enables wastewater treatment with photosynthetically produced oxygen and which presents potential for net autotrophic wastewater treatment in a compact system. Despite obvious differences inherent in the two, cryoconite and OPG pose striking resemblance. In both, the order Oscillatoriales in Cyanobacteria envelope inner materials and develop dense spheroidal aggregates. We explore the mechanism of photogranulation on account of high similarity between cryoconites and OPGs. We contend that there is no universal external cause for photogranulation. However, cryoconites and OPGs, as well as their intravariations, which are all under different stress fields, are the outcome of universal physiological processes of the Oscillatoriales interfacing with goldilocks interactions of stresses. Finding the rules of photogranulation may enhance engineering of glacier and wastewater systems to manipulate their ecosystem impacts. CI - (c) 2021 The Authors. Environmental Microbiology published by Society for Applied Microbiology and John Wiley & Sons Ltd. FAU - Park, Chul AU - Park C AUID- ORCID: 0000-0003-0695-8562 AD - Department of Civil and Environmental Engineering, University of Massachusetts Amherst, Amherst, Massachusetts, 01003, USA. FAU - Takeuchi, Nozomu AU - Takeuchi N AUID- ORCID: 0000-0002-3267-5534 AD - Department of Earth Sciences, Graduate School of Science, Chiba University, Chiba, 263-8522, Japan. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Review DEP - 20210928 PL - England TA - Environ Microbiol JT - Environmental microbiology JID - 100883692 RN - 0 (Waste Water) SB - IM MH - *Cyanobacteria MH - Ecosystem MH - Ice Cover/microbiology MH - Wastewater MH - *Water Purification PMC - PMC9292683 EDAT- 2021/09/22 06:00 MHDA- 2022/03/18 06:00 PMCR- 2022/07/18 CRDT- 2021/09/21 06:50 PHST- 2021/09/13 00:00 [revised] PHST- 2021/08/02 00:00 [received] PHST- 2021/09/16 00:00 [accepted] PHST- 2021/09/22 06:00 [pubmed] PHST- 2022/03/18 06:00 [medline] PHST- 2021/09/21 06:50 [entrez] PHST- 2022/07/18 00:00 [pmc-release] AID - EMI15780 [pii] AID - 10.1111/1462-2920.15780 [doi] PST - ppublish SO - Environ Microbiol. 2021 Nov;23(11):6391-6404. doi: 10.1111/1462-2920.15780. Epub 2021 Sep 28.