The dynamics of cable bacteria colonization in surface sediments: a 2D view

Abstract Cable bacteria that are capable of transporting electrons on centimeter scales have been found in a variety of sediment types, where their activity can strongly influence diagenetic reactions and elemental cycling. In this study, the patterns of spatial and temporal colonization of surficia...

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Autores principales:	Hang Yin, Robert C. Aller, Qingzhi Zhu, Josephine Y. Aller
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fe9e4e47e67c44cca9a4c60c99658e11
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spelling	oai:doaj.org-article:fe9e4e47e67c44cca9a4c60c99658e112021-12-02T18:17:41ZThe dynamics of cable bacteria colonization in surface sediments: a 2D view10.1038/s41598-021-86365-12045-2322https://doaj.org/article/fe9e4e47e67c44cca9a4c60c99658e112021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-86365-1https://doaj.org/toc/2045-2322Abstract Cable bacteria that are capable of transporting electrons on centimeter scales have been found in a variety of sediment types, where their activity can strongly influence diagenetic reactions and elemental cycling. In this study, the patterns of spatial and temporal colonization of surficial sediment by cable bacteria were revealed in two-dimensions by planar pH and H2S optical sensors for the first time. The characteristic sediment surface pH maximum zones begin to develop from isolated micro-regions and spread horizontally within 5 days, with lateral spreading rates from 0.3 to ~ 1.2 cm day−1. Electrogenic anodic zones in the anoxic sediments are characterized by low pH, and the coupled pH minima also expand with time. H2S heterogeneities in accordance with electrogenic colonization are also observed. Cable bacteria cell abundance in oxic surface sediment (0–0.25 cm) kept almost constant during the colonization period; however, subsurface cell abundance apparently increased as electrogenic activity expanded across the entire surface. Changes in cell abundance are consistent with filament coiling and growth in the anodic zone (i.e., cathodic snorkels). The spreading mechanism for the sediment pH–H2S fingerprints and the cable bacteria abundance dynamics suggest that once favorable microenvironments are established, filamentous cable bacteria aggregate or locally activate electrogenic metabolism. Different development dynamics in otherwise similar sediment suggests that the accessibility of reductant (e.g., dissolved phase sulfide) is critical in controlling the growth of cable bacteria.Hang YinRobert C. AllerQingzhi ZhuJosephine Y. AllerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hang Yin Robert C. Aller Qingzhi Zhu Josephine Y. Aller The dynamics of cable bacteria colonization in surface sediments: a 2D view
description	Abstract Cable bacteria that are capable of transporting electrons on centimeter scales have been found in a variety of sediment types, where their activity can strongly influence diagenetic reactions and elemental cycling. In this study, the patterns of spatial and temporal colonization of surficial sediment by cable bacteria were revealed in two-dimensions by planar pH and H2S optical sensors for the first time. The characteristic sediment surface pH maximum zones begin to develop from isolated micro-regions and spread horizontally within 5 days, with lateral spreading rates from 0.3 to ~ 1.2 cm day−1. Electrogenic anodic zones in the anoxic sediments are characterized by low pH, and the coupled pH minima also expand with time. H2S heterogeneities in accordance with electrogenic colonization are also observed. Cable bacteria cell abundance in oxic surface sediment (0–0.25 cm) kept almost constant during the colonization period; however, subsurface cell abundance apparently increased as electrogenic activity expanded across the entire surface. Changes in cell abundance are consistent with filament coiling and growth in the anodic zone (i.e., cathodic snorkels). The spreading mechanism for the sediment pH–H2S fingerprints and the cable bacteria abundance dynamics suggest that once favorable microenvironments are established, filamentous cable bacteria aggregate or locally activate electrogenic metabolism. Different development dynamics in otherwise similar sediment suggests that the accessibility of reductant (e.g., dissolved phase sulfide) is critical in controlling the growth of cable bacteria.
format	article
author	Hang Yin Robert C. Aller Qingzhi Zhu Josephine Y. Aller
author_facet	Hang Yin Robert C. Aller Qingzhi Zhu Josephine Y. Aller
author_sort	Hang Yin
title	The dynamics of cable bacteria colonization in surface sediments: a 2D view
title_short	The dynamics of cable bacteria colonization in surface sediments: a 2D view
title_full	The dynamics of cable bacteria colonization in surface sediments: a 2D view
title_fullStr	The dynamics of cable bacteria colonization in surface sediments: a 2D view
title_full_unstemmed	The dynamics of cable bacteria colonization in surface sediments: a 2D view
title_sort	dynamics of cable bacteria colonization in surface sediments: a 2d view
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/fe9e4e47e67c44cca9a4c60c99658e11
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The dynamics of cable bacteria colonization in surface sediments: a 2D view

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