Impacts of Bioaerosols on Atmospheric Ice Nucleation Processes

Hill, Tom; DeMott, Paul J.; Conen, Franz; Möhler, Ottmar

doi:10.1002/9781119132318.ch3a

Cited by 17 publications

(19 citation statements)

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“…, Hill et al. ). Despite this information, however, the community ecology of these processes is poorly understood.…”

Section: Introductionmentioning

confidence: 99%

“…, , Weber , Hill et al. ). Thus, knowledge concerning microbes in precipitation is potentially relevant to understanding global precipitation itself.…”

Section: Introductionmentioning

confidence: 99%

“…At temperatures warmer than À38°C, phase transition from liquid water to ice requires the presence of ice nucleating particles (INPs; Atkinson et al 2016, Kanji et al 2017, Knopf et al 2018. Various particles can act as ice nucleators (Szyrmer and Zawadzki 1997, Despr es et al 2012, Harrison et al 2016; however, those most efficient in catalyzing ice formation at warmer temperatures (>À15°C) are microbial or biogenic in origin (Murray et al 2012, Fr€ ohlich-Nowoisky et al 2015, Weber 2015, Hill et al 2017. Thus, knowledge concerning microbes in precipitation is potentially relevant to understanding global precipitation itself.…”

Section: Introductionmentioning

confidence: 99%

“…Because aerosolized microbial INPs may trigger ice formation and be-scavenged-by precipitation, they are predicted to have much shorter atmospheric residence times than other microbes (Burrows et al 2009b, Stopelli et al 2015. Thus, the ice nucleation active (INA) phenotype allows broad dissemination of aerosolized microbes (Sands et al 1982, Fitt et al 1989) while limiting prolonged exposure to damaging stresses (e.g., desiccation, UV radiation) associated with atmospheric transport (Attard et al 2012, Hill et al 2017. Despite this information, however, the community ecology of these processes is poorly understood.…”

Section: Introductionmentioning

confidence: 99%

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Spatiotemporal patterns of microbial composition and diversity in precipitation

Aho

Weber

Christner

et al. 2019

Ecological Monographs

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Microbes in the atmosphere have broad ecological impacts, including the potential to trigger precipitation through species and strains that act as ice nucleation particles. To characterize spatiotemporal trends of microbial assemblages in precipitation we sequenced 16S (bacterial) and 18S (fungal) rRNA gene amplicon libraries collected from 72 precipitation events in three U.S. states (Idaho, Louisiana, and Virginia) over four seasons. We considered these data from the perspective of a novel metacommunity framework. In agreement with our heuristic, we found evidence for distinct mechanisms underlying the composition and diversity of bacterial and fungal assemblages in precipitation. Specifically, we determined that (1) bacterial operational taxonomic unit (OTU) composition of precipitation was strongly associated with macroscale drivers including season and high-altitude characteristics of storms; (2) fungal OTU composition was strongly correlated with mesoscale drivers including particular spatial locations; (3) b-diversity (heterogeneity of taxa among samples) for both bacteria and fungi was largely maintained by turnover of taxa; however, (4) bacterial assemblages had higher contributions to total b-diversity from nestedness (i.e., lower richness assemblages were largely taxonomic subsets of richer assemblages), due to losses of taxa during dispersal, particularly among potential ice nucleation active bacteria; and (5) fungal assemblages had higher contributions to total b-diversity from turnover due to OTU replacement. Spatiotemporal trends in precipitation-borne metacommunities allowed delineation of a large number of statistically significant indicator taxa for particular sites and seasons, including trends for bacteria that are potentially ice nucleation active. Our findings advance understanding regarding the dispersion of aerosolized microbes via wet deposition, and the development of theory concerning potential assembly rules for bioaerosol assemblages.

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“…, Hill et al. ). Despite this information, however, the community ecology of these processes is poorly understood.…”

Section: Introductionmentioning

confidence: 99%

“…, , Weber , Hill et al. ). Thus, knowledge concerning microbes in precipitation is potentially relevant to understanding global precipitation itself.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spatiotemporal patterns of microbial composition and diversity in precipitation

Aho

Weber

Christner

et al. 2019

Ecological Monographs

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show abstract

“…(1) 生物气溶胶作为大气气溶胶的重要组成部分, 可通过吸收和散射太阳辐射与地面长波辐射, 影响地-气辐射平衡, 进而直接影响气候 [63] . (2) 生物气溶胶可以通过成核作用影响云的形成, 进而间接影响全球气候变化 [5,61,62] . 在大气环境中, 能够作为冰核的已知生物气溶胶颗粒包括花粉、藻类、真菌、地衣、昆虫、落叶和浮游生物等 [2] .…”

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