Effect of tectonic processes on biosphere-geosphere feedbacks across a convergent margin

Fullerton, Katherine M.
Schrenk, Matthew O.
Yücel, Mustafa
Manini, Elena
Basili, Marco
Rogers, Timothy J.
Fattorini, Daniele
Di Carlo, Marta
D'Errico, Giuseppe
Regoli, Francesco
Nakagawa, Mayuko
Vetriani, Costantino
Smedile, Francesco
Ramirez, Carlos
Miller, Heather
Morrison, Shaunna M.
Buongiorno, Joy
Jessen, Gerdhard L.
Steen, Andrew D.
Martinez, Maria
de Moor, J. Maarten
Barry, Peter H.
Giovannelli, Donato
Lloyd, Karen G.
The subsurface is among Earth's largest biomes, but the extent to which microbial communities vary across tectonic plate boundaries or interact with subduction-scale geological processes remains unknown. Here we compare bacterial community composition with deep-subsurface geochemistry from 21 hot springs across the Costa Rican convergent margin. We find that cation and anion compositions of the springs reflect the dip angle and position of the underlying tectonic structure and also correlate with the bacterial community. Co-occurring microbial cliques related to cultured chemolithoautotrophs that use the reverse tricarboxylic acid cycle (rTCA) as well as abundances of metagenomic rTCA genes correlate with concentrations of slab-volatilized carbon. This, combined with carbon isotope evidence, suggests that fixation of slab-derived CO2 into biomass may support a chemolithoautotrophy-based subsurface ecosystem. We calculate that this forearc subsurface biosphere could sequester 1.4 x 10(9) to 1.4 x 10(10) mol of carbon per year, which would decrease estimates of the total carbon delivered to the mantle by 2 to 22%. Based on the observed correlations, we suggest that distribution and composition of the subsurface bacterial community are probably affected by deep tectonic processes across the Costa Rican convergent margin and that, by sequestering carbon volatilized during subduction, these chemolithoautotrophic communities could in turn impact the geosphere.


Implications of giant ooids for the carbonate chemistry of Early Triassic seawater
Li, Xiaowei; Trower, Elizabeth J.; Lehrmann, Daniel J.; Minzoni, Marcello; Kelley, Brian M.; Schaal, Ellen K.; Altıner, Demir; Yu, Meiyi; Payne, Jonathan L. (2021-02-01)
Lower Triassic limestones contain giant ooids (>2 mm) along with other precipitated carbonate textures more typical of Precambrian strata. These features appear to have resulted from changes in seawater chemistry associated with the end-Permian mass extinction, but quantifying the carbonate chemistry of Early Triassic seawater has remained challenging. To constrain seawater carbonate saturation state, dissolved inorganic carbon, alkalinity, and pH, we applied a physicochemical model of ooid formation constr...
Bilir, Batıkan; Gücü , Ali Cemal; Department of Marine Biology and Fisheries (2019-10-04)
It is known that the temperature change in water resulted by the strength and direction of cold winds varying from year to year has an effect on the distribution of small pelagics which have yearly migration cycles in semi-closed systems such as Black Sea. However, how small pelagic species wintering in the southern Black Sea have adopted to this situation has not yet been elucidated. The aim of this study is to determine how the wintering distributions of three small pelagic fishes, Black Sea Anchovy (Engr...
Impacts of anthropogenic SOx, NOx and NH3 on acidification of coastal waters and shipping lanes
Hunter, Keith A.; Liss, Peter S.; Surapipith, Vanisa; Dentener, Frank; Duce, Robert; Kanakidou, Maria; Kubilay, Nilgun; Mahowald, Natalie; Okin, Greg; Sarin, Manmohan; Uematsu, Mitsuo; Zhu, Tong (2011-07-07)
The acidification of the ocean by anthropogenic CO2 absorbed from the atmosphere is now well-recognized and is considered to have lowered surface ocean pH by 0.1 since the mid-18th century. Future acidification may lead to undersaturation of CaCO3 making growth of calcifying organisms difficult. However, other anthropogenic gases also have the potential to alter ocean pH and CO2 chemistry, specifically SOx and NOx and NH3. We demonstrate using a simple chemical model that in coastal water regions with high ...
Effect of axial stresses on reservoir rocks
Kök, Mustafa Verşan; Buket Ulker, E. (2002-10-01)
The effect of axial stresses on rock is known to affect porosity, permeability, and rock compressibility and will be important in some reservoir rock types that are buried deep and at high temperatures. The aim of this project is to determine reservoir rock properties under in situ stress conditions and to observe the effects of axial stresses on reservoir rocks. For this purpose, a uniaxial stress device, which is capable of applying axial stress to the core samples, was used. The core samples chosen were ...
Effects of river inputs on particulate organic matter composition and distributions in surface waters and sediments of the Mersin Bay, Northeastern Mediterranean Sea
Akçay, İsmail; Tuğrul, Süleyman; Özhan, Koray (2022-05-01)
Terrestrial inputs-induced eutrophication in the P-depleted Northeastern (NE) Mediterranean shelf waters has led to changes in particulate organic matter (POM) composition and distributions in the water column and surface sediments. The present study aimed to understand the impacts of terrestrial nutrient and POM inputs on coastal eutrophication, bulk POM composition and concentrations in surface waters and sediments of the Mersin Bay, located at the Cilician Basin of NE Mediterranean Sea. The present resul...
Citation Formats
K. M. Fullerton et al., “Effect of tectonic processes on biosphere-geosphere feedbacks across a convergent margin,” NATURE GEOSCIENCE, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/90708.