Environ. Sci. Technol.
 2022
DOI: 10.1021/acs.est.2c01123
|Get access via publisher |Summarize |Cite
|
Sign up to set email alerts

Natural Asphalt Seeps Are Potential Sources for Recalcitrant Oceanic Dissolved Organic Sulfur and Dissolved Black Carbon

Jonas Brünjes
1
,
Michael Seidel
2
,
Thorsten Dittmar
3
et al.

Abstract: Natural oil seepages contribute about one-half of the annual petroleum input to marine systems. Yet, environmental implications and the persistence of water-soluble hydrocarbons from these seeps are vastly unknown. We investigated the release of oil-derived dissolved organic matter (DOM) from natural deep sea asphalt seeps using laboratory incubation experiments. Fresh asphalt samples collected at the Chapopote asphalt volcano in the Southern Gulf of Mexico were incubated aerobically in artificial seawater ove… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
28
3
2
2

Citation Types

6
20
0
0

Year Published

2022
2022
2026
2026

Publication Types

Select...
28
3

Relationship

2
29

Authors

Journals

citations

Cited by 30 publications

(26 citation statements)
references

References 95 publications

6
20
0
0
Order By: Relevance
“…Polycyclic aromatic sulfur heterocycles such as benzothiophenes are resistant to microbial degradation (Kropp and Fedorak 1998; Hegazi et al 2012) and accumulate in petroleum‐rich Guaymas Basin sediment and porewater (Mara et al 2022). Our findings therefore suggest that hydrothermal sediments release petroleum‐derived DOS with long residence times into the ocean, consistent with the working hypothesis that natural petroleum seepages are sources of recalcitrant DOS in deep‐sea environments (Brünjes et al 2022).…”
Section: Discussionsupporting
confidence: 90%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
show abstract
“…Polycyclic aromatic sulfur heterocycles such as benzothiophenes are resistant to microbial degradation (Kropp and Fedorak 1998; Hegazi et al 2012) and accumulate in petroleum‐rich Guaymas Basin sediment and porewater (Mara et al 2022). Our findings therefore suggest that hydrothermal sediments release petroleum‐derived DOS with long residence times into the ocean, consistent with the working hypothesis that natural petroleum seepages are sources of recalcitrant DOS in deep‐sea environments (Brünjes et al 2022).…”
Section: Discussionsupporting
confidence: 90%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
show abstract
“…10 Crude oil or asphalt with a relatively heavy carbon isotope composition (−27‰ to −26‰) could represent a potential source of marine DBC. 19 This hypothesis is supported by our results for seep carbonates, which yielded lower δ 13 C values for the BC and TOC fraction than for the asphalt fraction (Figure S2). Therefore, the degradation of relatively 13 C-enriched asphalt (−27.0‰ to −22.8‰, n = 6, Table S3) and the subsequent release of relatively 13 C-enriched DBC to the ocean 19 could possibly account for the offset in the carbon isotopic composition of DBC between rivers and the ocean.…”
Section: ■ Results and Discussionsupporting
confidence: 80%
“…19 This hypothesis is supported by our results for seep carbonates, which yielded lower δ 13 C values for the BC and TOC fraction than for the asphalt fraction (Figure S2). Therefore, the degradation of relatively 13 C-enriched asphalt (−27.0‰ to −22.8‰, n = 6, Table S3) and the subsequent release of relatively 13 C-enriched DBC to the ocean 19 could possibly account for the offset in the carbon isotopic composition of DBC between rivers and the ocean. 10 Another recent study provides further support for the release of isotopically light carbon during the degradation of PBC, resulting in the accumulation of relatively 13 C-enriched PBC in seawater.…”
Section: ■ Results and Discussionsupporting
confidence: 80%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
show abstract
“…28 C3 also matches C3 in the asphaltene biodegradation study by Brünjes et al , indicating biolabile and potentially toxic HOPs. 84 Furthermore, C3 matches C4 in a previous study by Harsha et al , which characterized photoproduced HOPs in laboratory simulations, representing reduced, aliphatic HOPs generated from 24 hours irradiated diesel. 81 Component 4 (C4) has Ex/Em values of 250/415 nm and matches 11 published models, including two unique petroleum signatures.…”
Section: Resultssupporting
confidence: 79%
“…C4 corresponds to C4 in the asphaltene biodegradation study by Brünjes et al , exhibiting a “humic-like” fluorescence signature. 84 C4 also matches C1 in a study by Whisenhant et al examining photoproduced HOPs generated from laboratory simulations, where C1 represented the most degraded HOPs that exhibited “humic-like” fluorescence. 82 This result indicates the presence of HOPs composed of long-wavelength, aromatic, oxygenated, and heteroatomic compounds.…”
Section: Resultssupporting
confidence: 71%
Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.
show abstract
scite logo

Scite is an AI-powered platform that helps researchers discover and evaluate scientific literature through Smart Citations, showing whether studies support or contradict a claim. Now part of Research Solutions, Scite has indexed 1.6B+ citations, partners with 30+ publishers, and serves 2M users worldwide.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Status

Copyright © 2026 Scite LLC. All rights reserved.

Made with 💙 for researchers

Part of the Research Solutions Family.

Research Solutions Logo