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Impact of sampling techniques on the concentration of ammonia and sulfide in pore water of marine sediments

Aleksandra Brodecka-Goluch
Aleksandra Brodecka-Goluch
, 
Patrycja Siudek
Patrycja Siudek
 e 
Jerzy Bolałek
Jerzy Bolałek
   | 03 giu 2019
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Article Category: Original research paper
Pubblicato online: 03 giu 2019
Pagine: 184 - 195
Ricevuto: 25 mag 2018
Accettato: 09 nov 2018
DOI: https://doi.org/10.1515/ohs-2019-0017
© 2019 Faculty of Oceanography and Geography, University of Gdańsk, Poland
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Profiles of ammonia concentration obtained for three methods of pore water sampling (a – rhizon samplers; b– centrifugation of sediment subsamples collected using syringes; c– centrifugation of sediment sections pushed out of core liners). In the case of Method II, concentration values for cores 5 and 6 were interpolated, and in the case of Method III, concentrations for each sediment layer are given for a sediment depth from the middle of a layer.
Profiles of ammonia concentration obtained for three methods of pore water sampling (a – rhizon samplers; b– centrifugation of sediment subsamples collected using syringes; c– centrifugation of sediment sections pushed out of core liners). In the case of Method II, concentration values for cores 5 and 6 were interpolated, and in the case of Method III, concentrations for each sediment layer are given for a sediment depth from the middle of a layer.

Figure 2

Profiles of sulfide concentration obtained by three methods of pore water sampling (a – rhizon samplers; b – centrifugation of sediment subsamples collected using syringes; c – centrifugation of sediment sections pushed out of core liners). In the case of Method II, concentration values for cores 5 and 6 were interpolated, and in the case of Method III, concentrations for each sediment layer are given for a sediment depth from the middle of a layer.
Profiles of sulfide concentration obtained by three methods of pore water sampling (a – rhizon samplers; b – centrifugation of sediment subsamples collected using syringes; c – centrifugation of sediment sections pushed out of core liners). In the case of Method II, concentration values for cores 5 and 6 were interpolated, and in the case of Method III, concentrations for each sediment layer are given for a sediment depth from the middle of a layer.

Figure 3

Profiles of the average ammonium concentration for three methods of pore water sampling (Method I – rhizon samplers, Method II – centrifugation of sediment subsamples, Method III – centrifugation of sediment sections). In the case of Method III, concentrations were averaged to obtain values for depths of 5, 10, 15 cm etc.
Profiles of the average ammonium concentration for three methods of pore water sampling (Method I – rhizon samplers, Method II – centrifugation of sediment subsamples, Method III – centrifugation of sediment sections). In the case of Method III, concentrations were averaged to obtain values for depths of 5, 10, 15 cm etc.

Figure 4

Profiles of average sulfide concentration for three methods of pore water sampling (Method I – rhizon samplers, Method II – centrifugation of sediment subsamples, Method III – centrifugation of sediment sections). In the case of Method III, concentrations were averaged to obtain values for depths of 5, 10, 15 cm etc.
Profiles of average sulfide concentration for three methods of pore water sampling (Method I – rhizon samplers, Method II – centrifugation of sediment subsamples, Method III – centrifugation of sediment sections). In the case of Method III, concentrations were averaged to obtain values for depths of 5, 10, 15 cm etc.

Summary of factors associated with the applied pore water extraction methods

Factor Method I (rhizon samplers) Method II (centrifugation of sediment subsamples collected using syringes) Method III (centrifugation of sediment sections pushed out of a core liner)
centrifugation – + +
contact with atmospheric air – +/– +
core disturbance – – +
filtration + – –

General information on the sampling station

Station ID EXP–1
Location 54°37'N;18°59'E
Water depth 85 m
Bottom water salinity 10.4 PSU
Bottom water temperature 5.9°C
Type of sediment silt
Corg content in layer 0–1 cm 7–8 % wt. *
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Inglese
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