Citation:

PANGAEA.983163

Name: The effect of sediment resuspension on pelagic nitrogen fixation in a Danish fjord - Sediment characteristics
Published: 2025-11-18
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Coastal dynamics; diazotrophs; nitrogen cycling; nitrogen fixation; Resuspension; seasonal fluctuations

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Published: 2025-11-18 • DOI registered: 2025-12-17

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Abstract:

This dataset contains sediment characteristics relevant to assessing the potential impact of sediment resuspension on biogeochemical processes in a microtidal fjord system. Sediment samples were collected seasonally during June, July, August, and September 2023 from Kærby Fed in Odense Fjord, Denmark. The data provide baseline information on sediment composition and nutrient content under varying natural conditions. Measured parameters include: (i) concentrations of dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP), analyzed using a spectrophotometer, (ii) particulate organic carbon (POC) and particulate organic nitrogen (PON), determined by Elemental Analysis–Isotope Ratio Mass Spectrometry, (iii) sediment chlorophyll a (Chl a), measured using a fluorometer, (iv) physical sediment properties, including density, water content, and porosity. Samples were processed in triplicates, and the dataset includes standard deviations to account for measurement variability. These data serve as a geochemical context for related studies investigating sediment resuspension and nutrient cycling in the Danish Baltic Sea region.

Keyword(s):

Coastal dynamics; diazotrophs; nitrogen cycling; nitrogen fixation; Resuspension; seasonal fluctuations

Supplement to:

Schlangen, Isabell; Riemann, Lasse; Attard, Karl Michael; Löscher, Carolin Regina (2025): The effect of sediment resuspension on pelagic nitrogen fixation in a Danish Fjord. Estuarine, Coastal and Shelf Science, 327, 109566, https://doi.org/10.1016/j.ecss.2025.109566

Related to:

Schlangen, Isabell; Löscher, Carolin Regina; Attard, Karl Michael; Sørensen, Lisbeth Fürst; Riemann, Lasse (2025): The effect of sediment resuspension on pelagic nitrogen fixation in a Danish fjord - Core incubations [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.983171

References:

Mohr, Wiebke; Großkopf, Tobias; Wallace, Douglas WR; LaRoche, Julie (2010): Methodological Underestimation of Oceanic Nitrogen Fixation Rates. PLoS ONE, 5(9), e12583, https://doi.org/10.1371/journal.pone.0012583

Funding:

Independent Research Fund Denmark (DFF), grant/award no. DFF-0217-00089B: Biogeochemical cycling and nitrogen fixation in Danish coastal regions

Coverage:

Latitude: 55.452444 * Longitude: 10.492889

Date/Time Start: 2023-06-19T00:00:00 * Date/Time End: 2023-09-05T00:00:00

Event(s):

Odense_Fjord_core_2023 * Latitude: 55.452444 * Longitude: 10.492889 * Date/Time Start: 2023-06-19T00:00:00 * Date/Time End: 2023-09-05T00:00:00 * Location: Kærby Fed, Odense Fjord, Denmark * Method/Device: Sediment corer (SEDCO)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type of study	Study type		Schlangen, Isabell
2	Location of event	Location		Schlangen, Isabell
3	Latitude of event	Latitude		Schlangen, Isabell
4	Longitude of event	Longitude		Schlangen, Isabell
5	Sampling date/time, experiment	Date/time sampling exp		Schlangen, Isabell
6	Month	Month		Schlangen, Isabell
7	Depth, sediment, experiment, top/minimum	Depth sed top	m	Schlangen, Isabell
8	Depth, sediment, experiment, bottom/maximum	Depth sed bot	m	Schlangen, Isabell
9	Sediment layer	Sed layer		Schlangen, Isabell	Homogenized
10	Number of measurements	n	#	Schlangen, Isabell
11	Carbon, organic, particulate	POC	%	Schlangen, Isabell	Elemental Analysis - Isotope Ratio Mass Spectrometry (EA-IRMS), Thermo Fisher Scientific, EA IsoLink CN - ConFlo IV - Delta V Plus
12	Carbon, organic, particulate, standard deviation	POC std dev	±	Schlangen, Isabell	Calculated
13	Nitrogen, organic, particulate	PON	%	Schlangen, Isabell	Elemental Analysis - Isotope Ratio Mass Spectrometry (EA-IRMS), Thermo Fisher Scientific, EA IsoLink CN - ConFlo IV - Delta V Plus
14	Nitrogen, organic, particulate, standard deviation	PON std dev	±	Schlangen, Isabell	Calculated
15	Organic matter, particulate	POM	%	Schlangen, Isabell	Loss on ignition
16	Organic matter, particulate, standard deviation	POM std dev	±	Schlangen, Isabell	Calculated
17	Water content, sediment	Water sed	%	Schlangen, Isabell	Weight loss after drying
18	Water content, standard deviation	Water std dev	±	Schlangen, Isabell	Calculated
19	Density	Density	g/cm³	Schlangen, Isabell	Dry mass per unit sample volume
20	Density, standard deviation	Density std dev	±	Schlangen, Isabell	Calculated
21	Porosity, volume	Poros vol		Schlangen, Isabell	Volumetric	Porosity, ɸ = volume water/total volume
22	Porosity, volume, standard deviation	Poros vol std dev	±	Schlangen, Isabell	Calculated
23	Carbon/Nitrogen ratio	C/N		Schlangen, Isabell	Elemental analyzer, Thermo Scientific, Flash EA 1112; coupled with an isotope ratio mass spectrometer, Thermo Fisher, Finnigan Delta Plus XP
24	Carbon/Nitrogen ratio, standard deviation	C/N std dev	±	Schlangen, Isabell	Calculated
25	Chlorophyll a	Chl a	µg/l	Schlangen, Isabell	Fluorometer, Turner Designs, Trilogy 7200-000	Surface Chl a
26	Chlorophyll a, standard deviation	Chl a std dev	±	Schlangen, Isabell	Calculated	Surface Chl a

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0)

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

416 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Study type	2 Location	3 Latitude	4 Longitude	5 Date/time sampling exp	6 Month	7 Depth sed top [m]	8 Depth sed bot [m]	9 Sed layer	10 n [#]	11 POC [%]	12 POC std dev [±]	13 PON [%]	14 PON std dev [±]	15 POM [%]	16 POM std dev [±]	17 Water sed [%]	18 Water std dev [±]	19 Density [g/cm³]	20 Density std dev [±]	21 Poros vol	22 Poros vol std dev [±]	23 C/N	24 C/N std dev [±]	25 Chl a [µg/l]	26 Chl a std dev [±]
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-06-19	June	0.000	0.005	0	3	0.496	0.052	0.119	0.012	0.615	0.086	34.103	2.186	1.754	0.067	0.598	0.044	4.151	0.227	33.696	3.887
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-06-19	June	0.005	0.010	1	3	0.391	0.081	0.089	0.029	0.480	0.107	33.686	0.822	2.120	0.252	0.731	0.315	4.390	0.327
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-06-19	June	0.010	0.020	2	3	0.311		0.096		0.407		28.611		1.440		0.412		3.229	0.161
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-06-19	June	0.020	0.030	3	3	0.295		0.092		0.388		24.560		1.930		0.474		3.196	0.326
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-06-19	June	0.030	0.040	4	3	0.467		0.118		0.585		26.304		1.840		0.484		3.952	0.090
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-06-19	June	0.040	0.050	5	3	0.379		0.100		0.479		25.053		1.876		0.470		3.802	0.096
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-07-25	July	0.000	0.005	0	3	0.410	0.049	0.104	0.003	0.514	0.052	33.693	3.250	1.844	0.074	0.621	0.068	3.957	0.297	31.918	5.117
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-07-25	July	0.005	0.010	1	3	0.419	0.105	0.105	0.014	0.523	0.118	26.544	1.903	1.722	0.144	0.457	0.054	4.004	0.251
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-07-25	July	0.010	0.020	2	3	0.414		0.090		0.504		24.561		1.991		0.489		4.594	0.265
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-07-25	July	0.020	0.030	3	3	0.394		0.083		0.477		23.559		1.804		0.425		4.740	0.332
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-07-25	July	0.030	0.040	4	3	0.221		0.045		0.266		22.695		1.974		0.448		4.932	0.171
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-07-25	July	0.040	0.050	5	3	0.185		0.037		0.222		21.367		2.078		0.444		4.998	0.284
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-08-07	August	0.000	0.005	0	3	0.802	0.174	0.163	0.022	0.965	0.191	36.118	3.573	1.744	0.147	0.626	0.014	4.922	0.223	26.063	2.713
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-08-07	August	0.005	0.010	1	3	0.552	0.101	0.101	0.036	0.653	0.136	26.472	0.551	2.071	0.142	0.548	0.034	5.456	0.439
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-08-07	August	0.010	0.020	2	3	0.477		0.105		0.582		25.115		1.963		0.493		4.542	0.260
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-08-07	August	0.020	0.030	3	3	0.400		0.098		0.497		22.501		1.911		0.430		4.087	0.380
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-08-07	August	0.030	0.040	4	3	0.266		0.077		0.343		21.827		2.135		0.466		3.469	0.366
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-08-07	August	0.040	0.050	5	3	0.276		0.076		0.351		21.344		2.188		0.467		3.648	0.297
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-09-05	September	0.000	0.005	0	3	0.500	0.232	0.109	0.027	0.609	0.259	33.568	3.276	1.911	0.007	0.641	0.060	4.607	0.274	28.289	2.263
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-09-05	September	0.005	0.010	1	3	0.495	0.124	0.106	0.014	0.600	0.137	26.450	1.424	1.981	0.093	0.523	0.006	4.681	0.351
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-09-05	September	0.010	0.020	2	3	0.380		0.108		0.489		23.547		2.030		0.478		3.512	0.311
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-09-05	September	0.020	0.030	3	3	0.449		0.166		0.616		21.147		2.128		0.450		2.705	0.429
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-09-05	September	0.030	0.040	4	3	0.508		0.123		0.631		21.151		1.877		0.397		4.142	0.247
Field experiment	Kærby Fed, Odense Fjord, Denmark	55.452444	10.492889	2023-09-05	September	0.040	0.050	5	3	0.612		0.126		0.738		20.920		2.218		0.464		4.853	0.336