Modern and ancient continental shelf anoxia: an overview

@article{Tyson1991ModernAA,
  title={Modern and ancient continental shelf anoxia: an overview},
  author={Richard V. Tyson and Thomas H. Pearson},
  journal={Geological Society, London, Special Publications},
  year={1991},
  volume={58},
  pages={1 - 24}
}
  • R. Tyson, T. Pearson
  • Published 1991
  • Environmental Science, Geography
  • Geological Society, London, Special Publications
Abstract The characteristics of mid-latitude shelf seas are primarily controlled by seasonal cyclicity in wind-driven mixing. Seasonal dysoxic-anoxic conditions may occur in summer in salinity-stratified estuarine or pro-delta settings, or more extensively in those open shelf areas where a total depth of ≤60 m and the seasonal thermocline result in a bottom water layer ≤10 m thick. When bottom circulation is limited the oxygen stored in this layer may become periodically exhausted if climatic… 

Figures and Tables from this paper

Hypoxia in the East China Sea: one of the largest coastal low-oxygen areas in the world.

Epifauna-dominated benthic shelf assemblages: Lessons from the modern Adriatic Sea

Abstract It has recently been proposed that the northern Adriatic shelf is a living laboratory in which to test the causes of the evolutionary shift from Paleozoic-like, stationary suspension feeders

Central Tethyan platform-top hypoxia during Oceanic Anoxic Event 1a

Abstract. Short-term hypoxia in epeiric water masses is a common phenomenon of modern marine environments and causes mass mortality in coastal marine ecosystems. Here, we test the hypothesis that

The Return of Shallow Shelf Seas as Extreme Environments: Anoxia and Macrofauna Reactions in the Northern Adriatic Sea

Anoxia is a key issue in the past and present marine ecosystems. This is because no other form of disturbance so severely affects marine communities over such extensive areas. Anoxia is also the only

Evidence for the Presence of Oxygen-Depleted Sapropel Intermediate Water across the Eastern Mediterranean during Sapropel S1

In the Eastern Mediterranean Sea (EMS), natural climate-driven changes that impacted its physical circulation and created deep-water anoxia have led to periods of distinctive deposits referred to as

Bottom water anoxia, inoceramid colonization, and benthopelagic coupling during black shale deposition on Demerara Rise (Late Cretaceous western tropical North Atlantic)

[1] The bulk rock geochemistry and inoceramid isotopic composition from Cenomanian to Santonian, finely laminated, organic-rich black shales, recovered during Ocean Drilling Program Leg 207 on
...

References

SHOWING 1-10 OF 156 REFERENCES

Zones of coastal hypoxia revealed by satellite scanning have implications for strategic fishing

Hypoxic (oxygen concentrations <2.5mg l−1) and occasionally anoxic bottom waters occur along the inner continental shelf of Texas and Louisiana1–4. Little is known, however, about the spatial and

New York bight water stratification: October 1974

Thermohaline stratification of New York Bight continental shelf water during October 1974, is basically of the summer regime. Salinity increases quite markedly with increased distance from the coast,

Seasonal oxygen depletion in the bottom waters of a Danish fiord and its effect on the benthic community

TLDR
A survey is presented of the frequency and distribution of anoxia which leads to mass mortality of the bottom fauna in Limfjorden and the composition of the benthic community is in some areas regulated by alternating sequences of extinction and recolonization.

Involvement of the oxygen minimum in benthic zonation on a deep seamount

LOW oxygen concentration in the seawater column reduces the abundance of midwater consumer populations1,2, which can enhance the supply of undegraded organic matter reaching the benthos. Low oxygen

Kimmeridge clay sedimentation — A new cyclic model

Catastrophic anoxia in the chesapeake bay in 1984.

TLDR
At present, oxygen-deficient waters containing significant concentrations of hydrogen sulfide have penetrated into Eastern Bay and the Choptank and Potomac rivers, and the continued absence of major destratifying events will prolong the present anoxic trend and may result in high benthic mortalities.

Palynofacies and sedimentology of some Late Jurassic sediments from the British Isles and northern North Sea

  • R. Tyson
  • Environmental Science, Geography
  • 1986
The variation of physical, chemical and ecological conditions through stratified water bodies is shown to be a useful integrating tool in the palaeoenvironmental modelling of epeiric sea facies.

Development of a Comprehensive Oxygen-Deficient Marine Biofacies Model: Evidence from Santa Monica, San Pedro, and Santa Barbara Basins, California Continental Borderland

An extensive data base of box core x-radiographs, bottom photographs, and box core faunal data has been employed to establish the relationships between dissolved oxygen content and (1) sediment
...