Citation:

PANGAEA.934189

Name: Summer denitrification rates in sand from the Janssand, Germany intertidal flat
Published: 2021-07-29
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Denitrification; Microphytobenthos; nitrate uptake; permeable sediment; sand flat

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Keyword(s):

Denitrification; Microphytobenthos; nitrate uptake; permeable sediment; sand flat

Related to:

Schutte, Charles A; Huanca-Valenzuela, Paulina; Lavik, Gaute; Marchant, Hannah K; de Beer, Dirk (2021): Advection Drives Nitrate Past the Microphytobenthos in Intertidal Sands, Fueling Deeper Denitrification. Frontiers in Microbiology, 12, https://doi.org/10.3389/fmicb.2021.556268

Source:

Schutte, Charles A; Huanca-Valenzuela, Paulina; Lavik, Gaute; Marchant, Hannah K; de Beer, Dirk (2021): Advection drives nitrate past the microphytobenthos in intertidal sands, fueling deeper denitrification [Source Code]. Code Ocean, https://doi.org/10.24433/CO.1921276.v1

Coverage:

Latitude: 53.737267 * Longitude: 7.696967

Date/Time Start: 2016-08-15T00:00:00 * Date/Time End: 2016-08-15T00:00:00

Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 0.040 m

Event(s):

mpbvdnf_summer * Latitude: 53.737267 * Longitude: 7.696967 * Date/Time: 2016-08-15T00:00:00 * Method/Device: Sediment corer (SEDCO) * Comment: Sediment cores collected during the day on falling tides when the tidal flat was exposed.

Comment:

The mpbvdnf_summer_dentirification_profile.csv file contains data in the following columns:

depth - the depth below the sediment surface at which each measurement was made within a single sediment core. Units = m.

rate_denitrification - the potential denitrification rate. Units = mmol N (m3 sediment)-1 h-1.

rate_denitrification_se - the standard error associated with each potential denitrification rate measurement. Units = mmol N (m3 sediment)-1 h-1.

Note: All data contained in this data file are from the mpbvdnf_summer sampling event.

Methods: Denitrification rates were measured using a modification of the acetylene block technique such that nitrate was converted to nitrous oxide rather than dinitrogen gas through the denitrification process. The same method was used to calculate the rates in both the mpbvdnf_summer_denitrification_profile.csv file and the mpbvdnf_winter_denitrification_profile.csv file. Site seawater amended with nitrate to a final concentration of 20 µmol L-1 and acetylene (20% saturation) was gravity drained down through the core. Repeated depth profiles were measured with a nitrous oxide microsensor. The denitrification rate at each depth was calculated as the linear increase in nitrous oxide concentration with respect to time. The standard error associated with each denitrification rate measurement was calculated as the standard error of the slope of the line used to calculate the denitrification rate.

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	DEPTH, sediment/rock	Depth sed	m	Schutte, Charles A	Microprofiler	Geocode
2	Nitrogen denitrification rate	N denitrifi	mmol/m³/h	Schutte, Charles A	N2O microsensors with acetylene block
3	Nitrogen denitrification rate, standard deviation	N denitrifi	±	Schutte, Charles A	Calculated

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

78 data points

Data

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

1 Depth sed [m]	2 N denitrifi [mmol/m³/h]	3 N denitrifi [±]
0.000	NaN	NaN
0.001	1.20	0.26
0.002	0.93	0.24
0.003	0.75	0.03
0.004	0.93	0.06
0.005	0.89	0.11
0.006	1.17	0.14
0.007	1.58	0.09
0.008	2.08	0.09
0.009	2.87	0.09
0.010	3.76	0.15
0.011	4.71	0.34
0.012	5.21	0.15
0.013	5.53	0.09
0.014	5.94	0.18
0.015	6.51	0.12
0.016	6.70	0.09
0.017	6.67	0.19
0.018	6.62	0.19
0.019	6.66	0.31
0.020
0.021	7.36	0.17
0.022	7.41	0.22
0.023	7.33	0.16
0.024	7.31	0.11
0.025	7.33	0.13
0.026	7.17	0.09
0.027	7.21	0.15
0.028	7.21	0.24
0.029	7.20	0.20
0.030	7.23	0.15
0.031	6.91	0.24
0.032	6.91	0.23
0.033	6.86	0.28
0.034	6.83	0.28
0.035	6.75	0.34
0.036	6.73	0.42
0.037	6.64	0.29
0.038	6.55	0.21
0.039	6.02	0.56
0.040