Citation:

PANGAEA.971924

Name: Meiofauna densities and respiration in the Atacama Trench region
Published: 2024-08-26
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Abundance; Hadal trench; meiofauna; Oxygen; Respiration; Sediment

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Published: 2024-08-26 • DOI registered: 2024-09-24

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Abstract:

Meiofauna samples were collected during SO261 in 2018 using a multi-corer at six hadal sites along Atacama Trench axis, two abyssal sites on each side of the trench and on the bathyal site on the Chilean slope. Sediment cores were sliced at a depth resolution of 1 cm down to 5 cm depth and the layers were fixed in 4% buffered formalin. Sediment samples were sieved and rinsed on a 20 µm mesh size for meiofauna analyses. Organisms were counted using a stereomicroscope and measured using a light microscope.

Keyword(s):

Abundance; Hadal trench; meiofauna; Oxygen; Respiration; Sediment

Related to:

Berg, Peter; Risgaard-Petersen, Nils; Rysgaard, Søren (1998): Interpretation of measured concentration profiles in sediment pore water. Limnology and Oceanography, 43(7), 1500-1510, https://doi.org/10.4319/lo.1998.43.7.1500

Glud, Ronnie N; Wenzhöfer, Frank (2024): Oxygen microprofiles measured in situ in sediments of Atacama Trench and adjacent abyssal plains [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.967174

Shimabukuro, Mauricio; Zeppilli, Daniela; Leduc, Daniel; Wenzhöfer, Frank; Berg, Peter; Rowden, Ashley A; Glud, Ronnie N (2022): Intra- and inter-spatial variability of meiofauna in hadal trenches is linked to microbial activity and food availability. Scientific Reports, 12, 4338, https://doi.org/10.1038/s41598-022-08088-1

Funding:

Danish National Research Foundation (DG), grant/award no. DNRF145: Danish Center for Hadal Research, HADAL

Coverage:

Median Latitude: -22.643689 * Median Longitude: -71.265900 * South-bound Latitude: -24.285000 * West-bound Longitude: -71.620700 * North-bound Latitude: -20.326200 * East-bound Longitude: -70.838050

Date/Time Start: 2018-03-06T07:41:00 * Date/Time End: 2018-03-28T17:17:00

Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.045 m

Event(s):

SO261_9-1 (Site 1) * Latitude: -23.820833 * Longitude: -70.838050 * Date/Time: 2018-03-06T07:41:00 * Elevation: -2544.6 m * Campaign: * Basis: * Method/Device: MultiCorer (MUC)

SO261_22-1 (GeoB22902-2, Site 6) * Latitude: -24.285000 * Longitude: -71.424000 * Date/Time: 2018-03-08T18:36:00 * Elevation: -7831.5 m * Campaign: * Basis: * Method/Device: MultiCorer (MUC)

SO261_36-1 (Site 5) * Latitude: -23.830650 * Longitude: -71.375450 * Date/Time: 2018-03-11T17:54:00 * Elevation: -7894.0 m * Campaign: * Basis: * Method/Device: MultiCorer (MUC) * Comment: MUC-2

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event
2	Optional event label	Event 2
3	Latitude of event	Latitude
4	Longitude of event	Longitude
5	Elevation of event	Elevation	m
6	Date/Time of event	Date/Time
7	Depth, top/min	Depth top	m	Shimabukuro, Mauricio
8	Depth, bottom/max	Depth bot	m	Shimabukuro, Mauricio
9	DEPTH, sediment/rock	Depth sed	m	Shimabukuro, Mauricio		Geocode
10	Meiofauna, abundance	Meiof	#/10 cm³	Shimabukuro, Mauricio	Stereo microscopy	Meiofauna individuals were counted in a known sediment volume using a stereomicroscope to derive the volume-specific meiofauna density.
11	Oxygen consumption, volume-specific	O2 con vol	µmol/cm³/day	Shimabukuro, Mauricio	Oxygen microsensor, Clark type (Revsbech, 1989)	Oxygen concentration microprofiles measured in situ in deep-sea sediments were analyzed with the program PROFILE 1.0 (Berg et al. 1998) to derive volume-specific oxygen consumption rates. The oxygen microprofiles are presented in Glud et al. 2021 (https://doi.org/10.1594/PANGAEA.967174).
12	Meiofauna, respiration rate, oxygen	Meiof Resp O2	µmol/cm³/day	Shimabukuro, Mauricio	Light microscope	Meiofauna respiration (R) was estimated based on the allometric equation R = 7.410^-3 W^-0.24 where W is the body weight. Body weight was derived from measuring the length and maximum width to calculate the body volume.

License:

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

Status:

Curation Level: Enhanced curation (CurationLevelC)

Size:

225 data points

Data

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

1 Event	2 Event 2	3 Latitude	4 Longitude	5 Elevation [m]	6 Date/Time	7 Depth top [m]	8 Depth bot [m]	9 Depth sed [m]	10 Meiof [#/10 cm³]	11 O2 con vol [µmol/cm³/day]	12 Meiof Resp O2 [µmol/cm³/day]
SO261_9-1	Site 1	-23.8208	-70.8380	-2545	2018-03-06T07:41:00	0.00	0.01	0.005	264.65	0.1249	0.0038
SO261_9-1	Site 1	-23.8208	-70.8380	-2545	2018-03-06T07:41:00	0.01	0.02	0.015	173.74	0.0440	0.0034
SO261_9-1	Site 1	-23.8208	-70.8380	-2545	2018-03-06T07:41:00	0.02	0.03	0.025	96.97	0.0023	0.0024
SO261_9-1	Site 1	-23.8208	-70.8380	-2545	2018-03-06T07:41:00	0.03	0.04	0.035	35.35	0.0000	0.0008
SO261_9-1	Site 1	-23.8208	-70.8380	-2545	2018-03-06T07:41:00	0.04	0.05	0.045	11.36	0.0000	0.0002
SO261_93-1	Site 2	-21.7887	-71.2044	-7912	2018-03-24T03:10:00	0.00	0.01	0.005	362.88	0.1086	0.0062
SO261_93-1	Site 2	-21.7887	-71.2044	-7912	2018-03-24T03:10:00	0.01	0.02	0.015	106.57	0.0115	0.0025
SO261_93-1	Site 2	-21.7887	-71.2044	-7912	2018-03-24T03:10:00	0.02	0.03	0.025	26.01	0.0033	0.0005
SO261_93-1	Site 2	-21.7887	-71.2044	-7912	2018-03-24T03:10:00	0.03	0.04	0.035	14.90	0.0074	0.0002
SO261_93-1	Site 2	-21.7887	-71.2044	-7912	2018-03-24T03:10:00	0.04	0.05	0.045	2.27	0.0000	0.0000
SO261_64-1	Site 3	-23.0523	-71.3029	-7994	2018-03-17T15:03:00	0.00	0.01	0.005	495.71	0.1430	0.0074
SO261_64-1	Site 3	-23.0523	-71.3029	-7994	2018-03-17T15:03:00	0.01	0.02	0.015	124.75	0.0142	0.0024
SO261_64-1	Site 3	-23.0523	-71.3029	-7994	2018-03-17T15:03:00	0.02	0.03	0.025	24.75	0.0093	0.0005
SO261_64-1	Site 3	-23.0523	-71.3029	-7994	2018-03-17T15:03:00	0.03	0.04	0.035	6.06	0.0000	0.0001
SO261_64-1	Site 3	-23.0523	-71.3029	-7994	2018-03-17T15:03:00	0.04	0.05	0.045	1.52	0.0000	0.0000
SO261_49-1	Site 4	-23.3837	-71.3450	-8063	2018-03-14T12:55:00	0.00	0.01	0.005	353.03	0.1536	0.0055
SO261_49-1	Site 4	-23.3837	-71.3450	-8063	2018-03-14T12:55:00	0.01	0.02	0.015	193.69	0.0082	0.0032
SO261_49-1	Site 4	-23.3837	-71.3450	-8063	2018-03-14T12:55:00	0.02	0.03	0.025	75.51	0.0092	0.0011
SO261_49-1	Site 4	-23.3837	-71.3450	-8063	2018-03-14T12:55:00	0.03	0.04	0.035	24.49	0.0035	0.0005
SO261_49-1	Site 4	-23.3837	-71.3450	-8063	2018-03-14T12:55:00	0.04	0.05	0.045	6.82	0.0000	0.0001
SO261_36-1	Site 5	-23.8306	-71.3755	-7894	2018-03-11T17:54:00	0.00	0.01	0.005	221.46	0.1190	0.0040
SO261_36-1	Site 5	-23.8306	-71.3755	-7894	2018-03-11T17:54:00	0.01	0.02	0.015	137.63	0.0122	0.0025
SO261_36-1	Site 5	-23.8306	-71.3755	-7894	2018-03-11T17:54:00	0.02	0.03	0.025	41.41	0.0262	0.0010
SO261_36-1	Site 5	-23.8306	-71.3755	-7894	2018-03-11T17:54:00	0.03	0.04	0.035	36.87	0.0059	0.0008
SO261_36-1	Site 5	-23.8306	-71.3755	-7894	2018-03-11T17:54:00	0.04	0.05	0.045	8.59	0.0046	0.0002
SO261_22-1	GeoB22902-2, Site 6	-24.2850	-71.4240	-7832	2018-03-08T18:36:00	0.00	0.01	0.005	191.67	0.2426	0.0033
SO261_22-1	GeoB22902-2, Site 6	-24.2850	-71.4240	-7832	2018-03-08T18:36:00	0.01	0.02	0.015	93.43	0.0152	0.0026
SO261_22-1	GeoB22902-2, Site 6	-24.2850	-71.4240	-7832	2018-03-08T18:36:00	0.02	0.03	0.025	11.36	0.0046	0.0002
SO261_22-1	GeoB22902-2, Site 6	-24.2850	-71.4240	-7832	2018-03-08T18:36:00	0.03	0.04	0.035	4.29	0.0046	0.0001
SO261_22-1	GeoB22902-2, Site 6	-24.2850	-71.4240	-7832	2018-03-08T18:36:00	0.04	0.05	0.045	2.78	0.0046	0.0000
SO261_76-1	Site 7	-22.9544	-71.6207	-5536	2018-03-20T10:06:00	0.00	0.01	0.005	96.97	0.0347	0.0014
SO261_76-1	Site 7	-22.9544	-71.6207	-5536	2018-03-20T10:06:00	0.01	0.02	0.015	53.54	0.0087	0.0010
SO261_76-1	Site 7	-22.9544	-71.6207	-5536	2018-03-20T10:06:00	0.02	0.03	0.025	21.72	0.0000	0.0004
SO261_76-1	Site 7	-22.9544	-71.6207	-5536	2018-03-20T10:06:00	0.03	0.04	0.035	9.85	0.0010	0.0002
SO261_76-1	Site 7	-22.9544	-71.6207	-5536	2018-03-20T10:06:00	0.04	0.05	0.045	7.58	0.0006	0.0001
SO261_117-1	Site 9	-20.3514	-70.9902	-4140	2018-03-28T17:17:00	0.00	0.01	0.005	272.22	0.0761	0.0043
SO261_117-1	Site 9	-20.3514	-70.9902	-4140	2018-03-28T17:17:00	0.01	0.02	0.015	154.29	0.0039	0.0028
SO261_117-1	Site 9	-20.3514	-70.9902	-4140	2018-03-28T17:17:00	0.02	0.03	0.025	70.71	0.0038	0.0016
SO261_117-1	Site 9	-20.3514	-70.9902	-4140	2018-03-28T17:17:00	0.03	0.04	0.035	37.37	0.0020	0.0009
SO261_117-1	Site 9	-20.3514	-70.9902	-4140	2018-03-28T17:17:00	0.04	0.05	0.045	14.65	0.0033	0.0004
SO261_106-1	Site 10	-20.3262	-71.2925	-7746	2018-03-26T19:54:00	0.00	0.01	0.005	260.61	0.1443	0.0042
SO261_106-1	Site 10	-20.3262	-71.2925	-7746	2018-03-26T19:54:00	0.01	0.02	0.015	144.70	0.0205	0.0031
SO261_106-1	Site 10	-20.3262	-71.2925	-7746	2018-03-26T19:54:00	0.02	0.03	0.025	43.69	0.0201	0.0014
SO261_106-1	Site 10	-20.3262	-71.2925	-7746	2018-03-26T19:54:00	0.03	0.04	0.035	7.07	0.0000	0.0002
SO261_106-1	Site 10	-20.3262	-71.2925	-7746	2018-03-26T19:54:00	0.04	0.05	0.045	2.53	0.0000	0.0001