Effects of near-bottom water oxygen concentration on biogeochemical cycling of C, N and S in sediments of the Gulf of Gdansk (southern Baltic)

Łukawska‐Matuszewska, Katarzyna; Kiełczewska, Joanna

doi:10.1016/j.csr.2016.02.001

Cited by 18 publications

(1 citation statement)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the case of benthic communities inhabiting the seabed of the Gulf of Gda ńsk, the factors that had the greatest impact on biomass structure, macrofauna burial depth and indices of bioturbation and bioirrigation potential were conditions such as salinity and oxygen concentration in the water above the bottom, and factors strongly related to these, such as sediment conditions. It is known that as oxygen conditions in the water above the seabed deteriorate, the concentration of toxic hydrogen sulfide in the sediments increases [41,[69][70][71].…”

Section: Conditions Of Bottom Water and Sediments And Their Impact On...mentioning

confidence: 99%

Role of Macrofaunal Communities in the Vistula River Plume, the Baltic Sea—Bioturbation and Bioirrigation Potential

Miernik

Janas

Kendzierska

2023

Biology

View full text Add to dashboard Cite

Macrozoobenthos plays a key role in the transformation of inputs from rivers to the sea, such as nutrients, organic matter, or pollutants, and influences biogeochemical processes in the sediments through bioturbation and bioirrigation activity. The purpose of our study was to determine the structure of benthic communities, their bioturbation (BPC) and bioirrigation potential (IPC), and the vertical distribution of macrofauna in the Gulf of Gdańsk. The study revealed changes in the structure of benthic communities and, consequently, in the bioturbation and bioirrigation potential in the study area. Despite the presence of diverse and rich communities in the coastal zone, BPC and IPC values, although high, were formed by a few species. Both indices were formed mainly by the clam Macoma balthica and polychaetes, although the proportion of polychaetes in IPC was higher than in BPC. In the deepest zones, the communities became poorer until they eventually disappeared, along with all macrofaunal functions. Both indices changed similarly with distance from the Vistula River mouth, and there was a very strong correlation between them. We also demonstrated that the highest diversity of the macrofauna was observed in the upper first cm of the sediment, but the highest biomass was observed in deeper layers—at a depth of up to 6 cm, and single individuals occurred even below 10 cm.

show abstract

Section: Conditions Of Bottom Water and Sediments And Their Impact On...mentioning

confidence: 99%

Role of Macrofaunal Communities in the Vistula River Plume, the Baltic Sea—Bioturbation and Bioirrigation Potential

Miernik

Janas

Kendzierska

2023

Biology

View full text Add to dashboard Cite

show abstract

Assessing the Diversity of Benthic Sulfate-Reducing Microorganisms in Northwestern Gulf of Mexico by Illumina Sequencing of dsrB Gene

et al. 2020

View full text Add to dashboard Cite

The impact of declining oxygen conditions on pyrite accumulation in shelf sediments (Baltic Sea)

et al. 2018

View full text Add to dashboard Cite

Deterioration of oxygen conditions in water below the halocline has been observed in the Baltic Sea. Deoxygenation is linked to the reduced frequency and volume of inflows of highly saline surface water from the North Sea (major Baltic inflows-MBIs) in the second half of the twentieth century and the increased organic matter respiration due to eutrophication. In the present study, the impact of worsening oxygen conditions on pyrite content in the Gdańsk Deep (max. depth of 118 m, southern Baltic Sea) sediments was determined. Geochemical parameters (acid volatile sulfides, pyrite sulfur, reactive iron, organic carbon, sedimentation rate and sediment age) were analyzed in relation to the variation in bottom water oxygen concentration and the occurrence of MBI. The obtained results demonstrate that pyrite content in the study area decreased after 1960. The declining pyrite content coincided with the deterioration of oxygen conditions (concentration \ 2 ml l-1) in bottom water. In the same period, reactive iron concentration decreased and organic carbon increased in sediment. In the period 1616-1960, average pyrite accumulation rate was 322 lmol m-2 day-1. In the subsequent years, its average accumulation rate decreased to 210 lmol m-2 day-1. Fluctuations of oxygenation of bottom water in the study area were manifested by highly variable degree of pyritization (36 ± 11%) and particulate organic carbon to pyrite sulfur ratio (2.8-37).

show abstract

Effects of near-bottom water oxygen concentration on biogeochemical cycling of C, N and S in sediments of the Gulf of Gdansk (southern Baltic)

Cited by 18 publications

References 69 publications

Role of Macrofaunal Communities in the Vistula River Plume, the Baltic Sea—Bioturbation and Bioirrigation Potential

Role of Macrofaunal Communities in the Vistula River Plume, the Baltic Sea—Bioturbation and Bioirrigation Potential

Assessing the Diversity of Benthic Sulfate-Reducing Microorganisms in Northwestern Gulf of Mexico by Illumina Sequencing of dsrB Gene

The impact of declining oxygen conditions on pyrite accumulation in shelf sediments (Baltic Sea)

Contact Info

Product

Resources

About