NDLI: Proterozoic ocean redox and biogeochemical stasis

Content Provider	PubMed Central
Author	Reinhard, Christopher T. Planavsky, Noah J. Robbins, Leslie J. Partin, Camille A. Gill, Benjamin C. Lalonde, Stefan V. Bekker, Andrey Konhauser, Kurt O. Lyons, Timothy W.
Abstract	The partial pressure of oxygen in Earth’s atmosphere has increased dramatically through time, and this increase is thought to have occurred in two rapid steps at both ends of the Proterozoic Eon (∼2.5–0.543 Ga). However, the trajectory and mechanisms of Earth’s oxygenation are still poorly constrained, and little is known regarding attendant changes in ocean ventilation and seafloor redox. We have a particularly poor understanding of ocean chemistry during the mid-Proterozoic (∼1.8–0.8 Ga). Given the coupling between redox-sensitive trace element cycles and planktonic productivity, various models for mid-Proterozoic ocean chemistry imply different effects on the biogeochemical cycling of major and trace nutrients, with potential ecological constraints on emerging eukaryotic life. Here, we exploit the differing redox behavior of molybdenum and chromium to provide constraints on seafloor redox evolution by coupling a large database of sedimentary metal enrichments to a mass balance model that includes spatially variant metal burial rates. We find that the metal enrichment record implies a Proterozoic deep ocean characterized by pervasive anoxia relative to the Phanerozoic (at least ∼30–40% of modern seafloor area) but a relatively small extent of euxinic (anoxic and sulfidic) seafloor (less than ∼1–10% of modern seafloor area). Our model suggests that the oceanic Mo reservoir is extremely sensitive to perturbations in the extent of sulfidic seafloor and that the record of Mo and chromium enrichments through time is consistent with the possibility of a Mo–N colimited marine biosphere during many periods of Earth’s history.
Related Links	http://dx.doi.org/10.1073/pnas.1208622110
Ending Page	5362
Page Count	6
Starting Page	5357
File Format	PDF
ISSN	00278424
e-ISSN	10916490
Journal	Proceedings of the National Academy of Sciences of the United States of America
Issue Number	14
Volume Number	110
Language	English
Publisher	National Academy of Sciences
Publisher Date	2013-04-02
Access Restriction	Open
Rights Holder	National Academy of Sciences
Subject Keyword	General Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Multidisciplinary

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Proterozoic ocean redox and biogeochemical stasis.

Redox chemistry in the phosphorus biogeochemical cycle

Ocean fronts drive marine fishery production and biogeochemical cycling

Dynamic interaction between basin redox and the biogeochemical nitrogen cycle in an unconventional Proterozoic petroleum system

An iron curtain in the Atlantic Ocean forms a biogeochemical divide

Physical and biogeochemical modulation of ocean acidification in the central North Pacific

Bacterial, Phytoplankton, and Viral Distributions and Their Biogeochemical Contexts in Meromictic Lake Cadagno Offer Insights into the Proterozoic Ocean Microbial Loop

The Importance of Kinetics and Redox in the Biogeochemical Cycling of Iron in the Surface Ocean

Redox systematics of a magma ocean with variable pressure-temperature gradients and composition

Proterozoic ocean redox and biogeochemical stasis

Similar Documents

Proterozoic ocean redox and biogeochemical stasis.

Redox chemistry in the phosphorus biogeochemical cycle

Ocean fronts drive marine fishery production and biogeochemical cycling

Dynamic interaction between basin redox and the biogeochemical nitrogen cycle in an unconventional Proterozoic petroleum system

An iron curtain in the Atlantic Ocean forms a biogeochemical divide

Physical and biogeochemical modulation of ocean acidification in the central North Pacific

Bacterial, Phytoplankton, and Viral Distributions and Their Biogeochemical Contexts in Meromictic Lake Cadagno Offer Insights into the Proterozoic Ocean Microbial Loop

The Importance of Kinetics and Redox in the Biogeochemical Cycling of Iron in the Surface Ocean

Redox systematics of a magma ocean with variable pressure-temperature gradients and composition

Proterozoic ocean redox and biogeochemical stasis