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Control mechanisms on the reactive silicate fluxes by using on board resuspension experiments in the eutrophicated coastal environment

Ebru Y. Özkan
Ebru Y. Özkan
 et 
Hasan B. Buyukisik
Hasan B. Buyukisik
   | 09 oct. 2023
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Article Category: Original research paper
Publié en ligne: 09 oct. 2023
Pages: 343 - 365
Reçu: 22 févr. 2023
Accepté: 13 juin 2023
DOI: https://doi.org/10.26881/oahs-2023.3.08
© 2023 Ebru Y. Özkan et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Sampling stations in the study area
Sampling stations in the study area

Figure 2

Seasonal CO3-2 distributions in sediment in the Gulf of İzmir Inner Bay
Seasonal CO3-2 distributions in sediment in the Gulf of İzmir Inner Bay

Figure 3

Seasonal orgC distributions in sediment in the Gulf of İzmir Inner Bay
Seasonal orgC distributions in sediment in the Gulf of İzmir Inner Bay

Figure 4

Seasonal Mn distributions in sediment in the Gulf of İzmir Inner Bay
Seasonal Mn distributions in sediment in the Gulf of İzmir Inner Bay

Figure 5

Seasonal BSi distributions in sediment in the Gulf of İzmir Inner Bay
Seasonal BSi distributions in sediment in the Gulf of İzmir Inner Bay

Figure 6

Seasonal chl-a distributions in sediment in the Gulf of İzmir Inner Bay
Seasonal chl-a distributions in sediment in the Gulf of İzmir Inner Bay

Figure 7

Distributions of dark-net silica fluxes in sediment in the Gulf of İzmir Inner Bay
Distributions of dark-net silica fluxes in sediment in the Gulf of İzmir Inner Bay

Figure 8

Relationships of silica flux in sediment and pore water silicate concentrations (Büyükışık et al. 2015)
Relationships of silica flux in sediment and pore water silicate concentrations (Büyükışık et al. 2015)

Figure 9

Relationships of biogenic silica and CaCO3-2 concentrations in sediment
Relationships of biogenic silica and CaCO3-2 concentrations in sediment

Figure 10

Relationships of biogenic silica against Chl-a concentrations in sediment
Relationships of biogenic silica against Chl-a concentrations in sediment

Figure 11

Relationships of Ca(%) and Ti(%) concentrations in sediment
Relationships of Ca(%) and Ti(%) concentrations in sediment

Figure 12

Relationships of Mn (ppm) and CO3-2 (%) concentrations in sediment
Relationships of Mn (ppm) and CO3-2 (%) concentrations in sediment

Figure 13

a - Relationships of silica flux dark net (μmol Si/m2 day) and BSi (%) concentrations in sediment in winter; b - Relationships of silica flux dark net (μmol Si/m2 day) and CO3-2 (%) concentrations in sediment in winter.
a - Relationships of silica flux dark net (μmol Si/m2 day) and BSi (%) concentrations in sediment in winter; b - Relationships of silica flux dark net (μmol Si/m2 day) and CO3-2 (%) concentrations in sediment in winter.

Figure 14

a - Relationships of silica flux dark net (μmol Si/m2 day) and OrgC (%) concentrations in sediment in winter; b - Relationships of silica flux dark net (μmol Si/m2 day) and Mn (ppm) concentrations in sediment in winter.
a - Relationships of silica flux dark net (μmol Si/m2 day) and OrgC (%) concentrations in sediment in winter; b - Relationships of silica flux dark net (μmol Si/m2 day) and Mn (ppm) concentrations in sediment in winter.

Figure 15

a - Relationships of silica flux dark net (μmol Si/m2 day) and BSi (%) concentrations in sediment in spring; b - Relationships of silica flux dark net (μmol Si/m2 day) and CO3-2 (%) concentrations in sediment in spring; c - Relationships of silica flux dark net (μmol Si/m2 day) and OrgC (%) concentrations in sediment in spring; d - Relatinships of silica flux dark net (μmol Si/m2 day) and Mn (ppm) concentrations in sediment in spring.
a - Relationships of silica flux dark net (μmol Si/m2 day) and BSi (%) concentrations in sediment in spring; b - Relationships of silica flux dark net (μmol Si/m2 day) and CO3-2 (%) concentrations in sediment in spring; c - Relationships of silica flux dark net (μmol Si/m2 day) and OrgC (%) concentrations in sediment in spring; d - Relatinships of silica flux dark net (μmol Si/m2 day) and Mn (ppm) concentrations in sediment in spring.

Figure 16

a - Relationships of silica flux dark net (μmol Si/ m2 day) and CO3-2 (%) concentrations in sediment in summer; b - Relationships of silica flux dark net (μmol Si/ m2 day) and OrgC (%) concentrations in sediment in summer.
a - Relationships of silica flux dark net (μmol Si/ m2 day) and CO3-2 (%) concentrations in sediment in summer; b - Relationships of silica flux dark net (μmol Si/ m2 day) and OrgC (%) concentrations in sediment in summer.

Figure 17

a - Relationships of silica flux dark net (μmol Si/m2 day) and BSi (%) concentrations in sediment in autumn; b - Relationships of silica flux dark net (μmol Si/m2 day) and CO3-2 (%) concentrations in sediment in autumn; c - Relationships of silica flux dark net (μmol Si/m2 day) and OrgC (%) concentrations in sediment in autumn; d - Relatinships of silica flux dark net (μmol Si/m2 day) and Mn (ppm) concentrations in sediment in autumn.
a - Relationships of silica flux dark net (μmol Si/m2 day) and BSi (%) concentrations in sediment in autumn; b - Relationships of silica flux dark net (μmol Si/m2 day) and CO3-2 (%) concentrations in sediment in autumn; c - Relationships of silica flux dark net (μmol Si/m2 day) and OrgC (%) concentrations in sediment in autumn; d - Relatinships of silica flux dark net (μmol Si/m2 day) and Mn (ppm) concentrations in sediment in autumn.

Parameters (a and b), correlation coefficients (r) and R2 values obtained from linear regression analysis between titanium (%) and carbonate (%)

CO3-2 = a ± b * Ti r
Seasons a b R2
Winter 11.288 -24.432 30.058 0.554
Spring - - - -
Summer 10.058 -17.552 48.329 0.693
Autumn 12.048 -24.162 65.813 0.811

Parameters (a and b), correlation coefficients (r) and R2 values obtained from linear regression analysis between titanium (%) and biogenic silica (%)

BSi = a ± b * Ti r
Seasons a b R2
Winter - - - -
Spring 10.888 -219.094 18.583 0.433
Summer 13.759 -310.132 20.385 0.451
Autumn - - - -
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