Geomicrobiology of Iron and Arsenic in Anoxic Sediments

2008 ◽  
pp. 123-146 ◽  
Author(s):  
Carolina Reyes ◽  
Jonathan R. Lloyd ◽  
Chad W. Saltikov
Keyword(s):  
Anoxic Sediments

Mobilization of Trace Metals and Inorganic Compounds during Resuspension of Anoxic Sediments from Trepangier Bayou, Louisiana

2011 ◽  
Vol 40 (2) ◽  
pp. 484-491 ◽  
Author(s):  
Heather J. Shipley ◽  
Yan Gao ◽  
Amy T. Kan ◽  
Mason B. Tomson
Keyword(s):  
Trace Metals ◽  
Inorganic Compounds ◽  
Anoxic Sediments

scholarly journals Oxidative Uranium Release from Anoxic Sediments under Diffusion-Limited Conditions

2017 ◽  
Vol 51 (19) ◽  
pp. 11039-11047 ◽  
Author(s):  
Sharon E. Bone ◽  
Melanie R. Cahill ◽  
Morris E. Jones ◽  
Scott Fendorf ◽  
James Davis ◽  
...  
Keyword(s):  
Anoxic Sediments ◽  
Diffusion Limited

scholarly journals Oxygenation of anoxic sediments triggers hatching of zooplankton eggs

2015 ◽  
Vol 282 (1817) ◽  
pp. 20152025 ◽  
Author(s):  
Elias Broman ◽  
Martin Brüsin ◽  
Mark Dopson ◽  
Samuel Hylander
Keyword(s):  
Sediment Surface ◽  
Substantial Part ◽  
System Modelling ◽  
Anoxic Sediments ◽  
Overlying Water ◽  
Pelagic Copepod ◽  
Coastal Marine ◽  
Copepod Population ◽  
Benthic Pelagic Coupling ◽  
Dormant Eggs

Many coastal marine systems have extensive areas with anoxic sediments and it is not well known how these conditions affect the benthic–pelagic coupling. Zooplankton lay their eggs in the pelagic zone, and some sink and lie dormant in the sediment, before hatched zooplankton return to the water column. In this study, we investigated how oxygenation of long-term anoxic sediments affects the hatching frequency of dormant zooplankton eggs. Anoxic sediments from the brackish Baltic Sea were sampled and incubated for 26 days with constant aeration whereby, the sediment surface and the overlying water were turned oxic. Newly hatched rotifers and copepod nauplii (juveniles) were observed after 5 and 8 days, respectively. Approximately 1.5 × 10 5 nauplii m −2 emerged from sediment turned oxic compared with 0.02 × 10 5 m −2 from controls maintained anoxic. This study demonstrated that re-oxygenation of anoxic sediments activated a large pool of buried zooplankton eggs, strengthening the benthic–pelagic coupling of the system. Modelling of the studied anoxic zone suggested that a substantial part of the pelagic copepod population can derive from hatching of dormant eggs. We suggest that this process should be included in future studies to understand population dynamics and carbon flows in marine pelagic systems.

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