Marine Sediments: 2015

Showing posts with label 2015. Show all posts

Wednesday, May 6, 2015

A revised global estimate of dissolved iron fluxes from marine sediments

This is also an important paper recently published on Iron-flows through marine sediments.

Denitrification, Anammox, and N2 Production in Marine Sediments

Interesting and recently published paper on Nitrogen-cycling in marine sediments!

Denitrification, Anammox, and N2 Production in Marine Sediments

Annual Review of Marine ScienceVol. 7: 403-423 (Volume publication date January 2015)DOI: 10.1146/annurev-marine-010213-135040Allan H. DevolSchool of Oceanography, University of Washington, Seattle, Washington 98195-5351; email: devol@u.washington.edu

Abstract: Fixed nitrogen limits primary productivity in many parts of the global ocean, and it consequently plays a role in controlling the carbon dioxide content of the atmosphere. The concentration of fixed nitrogen is determined by the balance between two processes: the fixation of nitrogen gas into organic forms by diazotrophs, and the reconversion of fixed nitrogen to nitrogen gas by denitrifying organisms. However, current sedimentary denitrification rates are poorly constrained, especially in permeable sediments, which cover the majority of the continental margin. Also, anammox has recently been shown to be an additional pathway for the loss of fixed nitrogen in sediments. This article briefly reviews sedimentary fixed nitrogen loss by sedimentary denitrification and anammox, including in sediments in contact with oxygen-deficient zones. A simple extrapolation of existing rate measurements to the global sedimentary denitrification rate yields a value smaller than many existing measurement-based estimates but still larger than the rate of water column denitrification.

You can visit Annual Reviews WebSite for more information

Friday, March 13, 2015

15th International Echinoderm Conference, Playa del Carmen Mexico - May 25th to 29th, 2015.

More information here

Monday, December 22, 2014

8th International Conference on Remediation and Management of Contamined Sediments

Conference Highlights

Monday, January 12

· 10 Short Courses

· Exhibits open, Welcome Reception, Group 1 Poster Display

· Plenary Session, with feature speaker Anthony C. Janetos (Boston University), “The National Climate Change Assessment: Climate Change Impacts in the United States and Beyond.”

Tuesday-Thursday, January 13-15

· Nearly 500 platform talks and poster presentations scheduled in 51 breakout sessions

· 4 panel discussions

· 70+ exhibitors

· Student Mixer

· Multiple networking opportunities: daily continental breakfasts, lunches, and poster receptions.

· Closing Roundtable Forum—“The Billion-Dollar Question: Can Urban Master Planning Help Resolve the Cost/Benefit Impasse at Large Contaminated Sediment Sites?”

See the Daily Schedule for a quick, 2-page overview of the sessions and panels scheduled each day. The Technical Program lists the title, authors, and scheduled speaker for each presentation and the scope and panelists for each panel.

The technical program was developed after an extensive, multi-level review by the Program Committee and the session chairs of more than 500 abstracts received in response to the Call for Abstracts.