Microscale decoupling of sediment oxygen consumption and microbial biomass in an oligotrophic lake

2016 ◽  
Vol 61 (9) ◽  
pp. 1477-1491
Author(s):  
Jan Torsten Jeske ◽  
Roger A. Müller ◽  
Annelie Wendeberg ◽  
Stefan Bertilsson
Keyword(s):  
Oxygen Consumption ◽  
Microbial Biomass ◽  
Oligotrophic Lake ◽  
Sediment Oxygen Consumption

scholarly journals Sediment Oxygen Consumption and Microbial Community Structure in Tokyo Bay

2010 ◽  
Vol 66 (1) ◽  
pp. 1036-1040 ◽  
Author(s):  
Masanori ENDO ◽  
Yukio KOIBUCHI ◽  
Masafumi FUJITA ◽  
Jumpei SUZUKI ◽  
Hisako OGURA ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Tokyo Bay ◽  
Sediment Oxygen Consumption

scholarly journals Sensitivity of hypoxia predictions for the northern Gulf of Mexico to sediment oxygen consumption and model nesting

2013 ◽  
Vol 118 (2) ◽  
pp. 990-1002 ◽  
Author(s):  
Katja Fennel ◽  
Jiatang Hu ◽  
Arnaud Laurent ◽  
Martinho Marta-Almeida ◽  
Robert Hetland
Keyword(s):  
Oxygen Consumption ◽  
Gulf Of Mexico ◽  
Northern Gulf Of Mexico ◽  
Sediment Oxygen Consumption

Sediment oxygen consumption in semi-closed Korean coastal bays during summer

2009 ◽  
Vol 44 (3) ◽  
pp. 161-171 ◽  
Author(s):  
Jae Seong Lee ◽  
Seonggil Kim ◽  
Seong-Su Kim ◽  
Soonmo An ◽  
Yeong-Tae Kim ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Coastal Bays ◽  
Sediment Oxygen Consumption

scholarly journals CHARACTERISTICS OF OXYGEN CONSUMPTION BY SEDIMENT UNDER HYPOXIC CONDITION IN ENCLOSED COASTAL SEAS

2012 ◽  
Vol 1 (33) ◽  
pp. 24
Author(s):  
Toru Endo ◽  
Takaaki Shigematsu ◽  
Keisuke Mizuta
Keyword(s):  
Oxygen Consumption ◽  
Seasonal Variations ◽  
Oxygen Demand ◽  
Hypoxic Condition ◽  
Summer Season ◽  
Sediment Oxygen Demand ◽  
Chemical Factor ◽  
Field Investigations ◽  
Sediment Oxygen Consumption ◽  
Actual Field

Enclosed coastal seas are suffering from serious environmental problems which caused by hypoxic condition occurring at the bottom of sea during summer season. Although many restoration technologies for supplying oxygen to the bottom of the sea are developed, it is necessary to understand the characteristics of sediment oxygen consumption (SOC) before applying these technologies in actual field because it is thought that the sediment oxygen demand increases under hypoxic condition. In this study, we carried out the field investigations for a year at Osaka bay by using a new chamber method which can measure SOC under hypoxic condition in order to examine the seasonal variations of SOC. In addition we conducted the laboratory experiment for examining the effects of biological and chemical factor on the SOC.

scholarly journals Numerical analysis of the primary processes controlling oxygen dynamics on the Louisiana shelf

2015 ◽  
Vol 12 (7) ◽  
pp. 2063-2076 ◽  
Author(s):  
L. Yu ◽  
K. Fennel ◽  
A. Laurent ◽  
M. C. Murrell ◽  
J. C. Lehrter
Keyword(s):  
Oxygen Consumption ◽  
Primary Production ◽  
Water Column ◽  
Model Simulation ◽  
Spatial Extent ◽  
Biogeochemical Model ◽  
Vertical Diffusion ◽  
Louisiana Shelf ◽  
Sediment Oxygen Consumption ◽  
Water Column Respiration

Abstract. The Louisiana shelf, in the northern Gulf of Mexico, receives large amounts of freshwater and nutrients from the Mississippi–Atchafalaya river system. These river inputs contribute to widespread bottom-water hypoxia every summer. In this study, we use a physical–biogeochemical model that explicitly simulates oxygen sources and sinks on the Louisiana shelf to identify the key mechanisms controlling hypoxia development. First, we validate the model simulation against observed dissolved oxygen concentrations, primary production, water column respiration, and sediment oxygen consumption. In the model simulation, heterotrophy is prevalent in shelf waters throughout the year, except near the mouths of the Mississippi and Atchafalaya rivers, where primary production exceeds respiratory oxygen consumption during June and July. During this time, efflux of oxygen to the atmosphere, driven by photosynthesis and surface warming, becomes a significant oxygen sink. A substantial fraction of primary production occurs below the pycnocline in summer. We investigate whether this primary production below the pycnocline is mitigating the development of hypoxic conditions with the help of a sensitivity experiment where we disable biological processes in the water column (i.e., primary production and water column respiration). With this experiment we show that below-pycnocline primary production reduces the spatial extent of hypoxic bottom waters only slightly. Our results suggest that the combination of physical processes (advection and vertical diffusion) and sediment oxygen consumption largely determine the spatial extent and dynamics of hypoxia on the Louisiana shelf.

Sediment Oxygen Consumption in Tropical Undrainable Fish Ponds

1987 ◽  
Vol 72 (3) ◽  
pp. 297-305 ◽  
Author(s):  
J. Oláh ◽  
V. R. P. Sinha ◽  
S. Ayyappan ◽  
C. S. Purushothaman ◽  
S. Radheyshyam
Keyword(s):  
Oxygen Consumption ◽  
Fish Ponds ◽  
Sediment Oxygen Consumption
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