Species-specific effects of two bioturbating polychaetes on sediment chemoautotrophic bacteria

Vasquez‐Cardenas, Diana; Quintana, Cintia Organo; Meysman, Filip J. R.; Kristensen, Erik; Boschker, Henricus T. S.

doi:10.3354/meps11679

Cited by 25 publications

(23 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here we present a conceptual model exploring how we think bioirrigation influences the redox geochemistry in the East Anglian salt marsh sediments. It has been demonstrated in many different environments that bioirrigation impacts the rates and pathways of organic matter oxidation coupled either to iron or sulfate reduction and acts to redistribute iron and sulfur in the solid phase (e.g., Goldhaber et al, 1977;Aller, 1980;Berner and Westrich, 1985;Kostka et al, 2002;Wijsman et al, 2002;Canfield and Farquhar, 2009;Aller et al, 2010;Severmann et al, 2010;Kristensen et al, 2014;Rubin-Blum et al, 2014b;Dale et al, 2015;Quintana et al, 2015;van de Velde and Meysman, 2016;Vasquez-Cardenas et al, 2016). In our study area, we find evidence for bioturbation only in the iron-rich sediment and not in the sulfiderich sediments.…”

Section: Bioturbation As An Ecosystem Engineersupporting

confidence: 40%

The Sedimentary Carbon-Sulfur-Iron Interplay – A Lesson From East Anglian Salt Marsh Sediments

et al. 2019

View full text Add to dashboard Cite

We explore the dynamics of the subsurface sulfur, iron and carbon cycles in salt marsh sediments from East Anglia, United Kingdom. We report measurements of pore fluid and sediment geochemistry, coupled with results from laboratory sediment incubation experiments, and develop a conceptual model to describe the influence of bioturbation on subsurface redox cycling. In the studied sediments the subsurface environment falls into two broadly defined geochemical patterns-iron-rich sediments or sulfiderich sediments. Within each sediment type nearly identical pore fluid and solid phase geochemistry (in terms of concentrations of iron, sulfate, sulfide, dissolved inorganic carbon (DIC), and the sulfur and oxygen isotope compositions of sulfate) are observed in sediments that are hundreds of kilometers apart. Strictly iron-rich and strictly sulfiderich sediments, despite their substantive geochemical differences, are observed within spatial distances of less than five meters. We suggest that this bistable system results from a series of feedback reactions that determine ultimately whether sediments will be sulfide-rich or iron-rich. We suggest that an oxidative cycle in the iron-rich sediment, driven by bioirrigation, allows rapid oxidation of organic matter, and that this irrigation impacts the sediment below the immediate physical depth of bioturbation. This oxidative cycle yields iron-rich sediments with low total organic carbon, dominated by microbial iron reduction and no methane production. In the absence of bioirrigation, sediments in the salt marsh become sulfide-rich with high methane concentrations. Our results suggest that the impact of bioirrigation not only drives recycling of sedimentary material but plays a key role in sedimentary interactions among iron, sulfur and carbon.

show abstract

Section: Bioturbation As An Ecosystem Engineersupporting

confidence: 40%

The Sedimentary Carbon-Sulfur-Iron Interplay – A Lesson From East Anglian Salt Marsh Sediments

et al. 2019

View full text Add to dashboard Cite

show abstract

“…This deep injection of electron acceptors can increase the decomposition of organic matter, but also stimulate DCF, such as nitrification along burrow structure (Kristensen & Kostka, 2005). Pore water rich in reduced compounds (e.g., elemental sulfur, thiosulfate, and hydrogen) is also pushed through the sediment during burrow flushing, which may stimulate anaerobic chemoautotrophic carbon fixation in subsurface sediment via S-disproportionation or H 2 -oxidization (Thomsen & Kristensen, 1997;Vasquez-Cardenas et al, 2016). Additionally bio-mixing, that is, particle reworking, strongly increases the iron cycling in the sediment, by stimulating the two-way interconversion between iron sulfides (FeS) and iron oxides (FeOOH), whereby iron oxides are transported downwards and reduced, and iron sulfides are transported upwards and oxidized (Canfield et al, 1993;Kristensen & Kostka, 2005;Meysman et al, 2006;Seitaj et al, 2015).…”

Section: Bioturbated Sedimentsmentioning

confidence: 99%

“…Within the dataset analyzed, seasonal changes in DCF depth distribution have been attributed to the seasonal decrease of bioturbation in sub-Arctic sediments (Vasquez-Cardenas et al, 2018). However, the biogeochemical effects of bioturbating fauna largely depend on the functional traits of the species present (Bertics & Ziebis, 2009;Laverock et al, 2010;Marinelli et al, 2002;Vasquez-Cardenas et al, 2016). Therefore, two bioturbated sediments, with different species composition, may show different DCF depth-distributions as seen among ZK11, OSF, WMF, and NS.15 (supporting information, Figure S3, fauna found at each site are described in supporting information).…”

Section: 1029/2019gb006298mentioning

confidence: 99%

A Cross‐System Comparison of Dark Carbon Fixation in Coastal Sediments

Vasquez‐Cardenas

Meysman

Boschker

2020

Global Biogeochemical Cycles

View full text Add to dashboard Cite

Dark carbon fixation (DCF) by chemoautotrophic microorganisms can sustain food webs in the seafloor by local production of organic matter independent of photosynthesis. The process has received considerable attention in deep sea systems, such as hydrothermal vents, but the regulation, depth distribution, and global importance of coastal sedimentary DCF have not been systematically investigated. Here we surveyed eight coastal sediments by means of stable isotope probing (13C‐DIC) combined with bacterial biomarkers (phospholipid‐derived fatty acids) and compiled additional rates from literature into a global database. DCF rates in coastal sediments range from 0.07 to 36.30 mmol C m−2 day−1, and there is a linear relation between DCF and water depth. The CO2 fixation ratio (DCF/CO2 respired) also shows a trend with water depth, decreasing from 0.09 in nearshore environments to 0.04 in continental shelf sediments. Five types of depth distributions of chemoautotrophic activity are identified based on the mode of pore water transport (advective, bioturbated, and diffusive) and the dominant pathway of microbial sulfur oxidation. Extrapolated to the global coastal ocean, we estimate a DCF rate of 0.04 to 0.06 Pg C year−1, which is less than previous estimates based on indirect measurements (0.15 Pg C year−1), but remains substantially higher than the global DCF rate at deep sea hydrothermal vents (0.001–0.002 Pg C year−1).

show abstract

“…Bioturbation can thus increase reoxidation processes by chemoautotrophic microbes in both deeper sediment layers and along burrow structures (Reichardt 1988, Kristensen & Kostka 2005, Vasquez-Cardenas et al 2016. Biological mixing by fauna takes place on the top 5 cm of Kobbefjord sediments (Sørensen et al 2015).…”

Section: Seasonal Variations Of Chemoautotrophymentioning

confidence: 99%

Bacterial chemoautotrophic reoxidation in sub-Arctic sediments: a seasonal study in Kobbefjord, Greenland

Vasquez‐Cardenas

Meire

Sørensen³

et al. 2018

Mar. Ecol. Prog. Ser.

Self Cite

View full text Add to dashboard Cite

Anoxic mineralization of organic matter releases dissolved inorganic carbon and produces reduced mineralization products. The reoxidation of these reduced compounds is essential for biogeochemical cycling in sediments and is mainly performed by chemoautotrophic microbes, which synthesize new organic carbon by dark CO2 fixation. At present however, the biogeochemical importance of chemoautotrophy in high-latitude sediments is largely unknown. Here, we determine the seasonal variation in sedimentary chemoautotrophic production in Kobbefjord (SW Greenland). Intact sediment cores from the fjord were incubated, and dark CO2 fixation was quantified by combining bacterial phospholipid-derived fatty acid analysis with 13 C stable isotope probing (PLFA-SIP). Our results reveal a distinct seasonal cycle in chemoautotrophic activity, which increases after the spring bloom and shows lowest activity in the late winter when the fjord is covered by sea ice. The depth distribution of chemoautotrophic activity also varied seasonally, likely due to seasonal variation in the bioturbation activity of sediment infauna. Although chemoautotrophy rates (0.4 ± 0.2 mmol-C m-2 d-1) were in the low range for coastal sediments, they are comparable to those from intertidal sandflats and brackish tropical lagoons, and scale with the sulfide production through sulfate reduction in the fjord. Chemoautotrophic production in these fjord sediments thus appears to be mainly driven by sulfide oxidation and can re-fix 4% of the CO2 produced by mineralization.

show abstract

Species-specific effects of two bioturbating polychaetes on sediment chemoautotrophic bacteria

Cited by 25 publications

References 62 publications

The Sedimentary Carbon-Sulfur-Iron Interplay – A Lesson From East Anglian Salt Marsh Sediments

The Sedimentary Carbon-Sulfur-Iron Interplay – A Lesson From East Anglian Salt Marsh Sediments

A Cross‐System Comparison of Dark Carbon Fixation in Coastal Sediments

Bacterial chemoautotrophic reoxidation in sub-Arctic sediments: a seasonal study in Kobbefjord, Greenland

Contact Info

Product

Resources

About