Sediment disturbance experiment data with samples from the Chatham Rise, Southwest Pacific
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| Format: | Dataset Open Access |
| Sprache: | en |
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2025
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| _version_ | 1867172205197000704 |
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| author | Hale, Rachel |
| author_facet | Hale, Rachel |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We examined changes in environmental parameters following an experimental benthic disturbance using a modified plough (estimated 15 cm penetration) on the Chatham Rise (~450 m depth), Aotearoa/New Zealand. Sediment core retrievals were undertaken using an Oceans Instruments MC-800 multicorer fitted with six 70 cm long polycarbonate core tubes with 9.52 cm internal diameter that took place pre-disturbance on 16-17 June 2019 (voyage TAN1903), post-disturbance on 24-25 June 2019 (TAN1903) and one-year post-disturbance on 14-19 June 2020 (TAN2005). In order to determine any background changes in the larger surrounding area between years (2019, 2020), an additional reference site with similar hydrographic and sediment attributes (REF, depth = 455 m), located approximately 15 km to the north-west of the Butterknife (Figure 1B), was also sampled in the pre-disturbance period (n = 2, TAN1903) and one-year post-disturbance (n = 3, TAN2005). Sediment flux measurements were taken from subsampled multicores (0-10 cm layer) using sealed stirred aquaria maintained at bottom water conditions in the controlled temperature laboratory on RV Tangaroa. Sediment community oxygen consumption (SCOC) was measured via a sensor inserted through a sampling port in the chamber lid (FireStingO2, Pyroscience) upon commencement of the incubation and approximately every 2 hours until seawater oxygen concentration was depleted to 85-90% of the initial concentration to obtain a time-series of 3-6 measurements of oxygen consumption. Absolute concentrations of nutrients: ammonium ([NH4-N]), nitrite + nitrate ([NOx-N]), and phosphate ([PO4-P]), from overlying seawater samples (15 mL, 0.45 μm filtered, frozen at -20°C upon collection) taken at time 0 and upon termination of the SCOC experiment were quantified using an auto-analyser. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_975706 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Sediment disturbance experiment data with samples from the Chatham Rise, Southwest Pacific Hale, Rachel Ammonium; Ammonium, flux; Bacteria; Biomass, wet mass; Biomass, wet mass per area; Calculated; Community, oxygen consumption; DATE/TIME; Date/Time local; deep sea mining; Depth, bathymetric; Device type; Event label; Flow-cytometer; Habitat modification; Identification; LATITUDE; Location; LONGITUDE; Macrofauna; Nitrate and Nitrite; Nitrite and nitrate, flux; Number of species; Number of species per area; Phosphorus, reactive; Phosphorus, reactive, dissolved, flux; ROBES; Seal segmented flow colorimetric auto-analyser; Sediment; sediment community oxygen consumption; Shannon Diversity Index; Site; Species richness; Station label; TAN1903; TAN1903_121; TAN1903_122; TAN1903_123; TAN1903_124; TAN1903_133; TAN1903_134; TAN1903_135; TAN1903_136; TAN1903_137; TAN1903_138; TAN1903_139; TAN1903_140; TAN1903_141; TAN1903_143; TAN1903_144; TAN1903_35; TAN1903_36; TAN1903_56; TAN1903_57; TAN1903_58; TAN1903_59; TAN1903_60; TAN1903_61; TAN1903_62; TAN1903_63; TAN1903_64; TAN1903_76; TAN1903_77; TAN1903_78; TAN1903_80; TAN1903_81; TAN2005; TAN2005_137; TAN2005_138; TAN2005_139; TAN2005_140; TAN2005_141; TAN2005_36; TAN2005_37; TAN2005_39; TAN2005_56; TAN2005_58; TAN2005_61; TAN2005_78; TAN2005_81; TAN2005_82; TAN2005_85; TAN2005_88; TAN2005_90; Tangaroa; Time point, descriptive; Type; Type of study We examined changes in environmental parameters following an experimental benthic disturbance using a modified plough (estimated 15 cm penetration) on the Chatham Rise (~450 m depth), Aotearoa/New Zealand. Sediment core retrievals were undertaken using an Oceans Instruments MC-800 multicorer fitted with six 70 cm long polycarbonate core tubes with 9.52 cm internal diameter that took place pre-disturbance on 16-17 June 2019 (voyage TAN1903), post-disturbance on 24-25 June 2019 (TAN1903) and one-year post-disturbance on 14-19 June 2020 (TAN2005). In order to determine any background changes in the larger surrounding area between years (2019, 2020), an additional reference site with similar hydrographic and sediment attributes (REF, depth = 455 m), located approximately 15 km to the north-west of the Butterknife (Figure 1B), was also sampled in the pre-disturbance period (n = 2, TAN1903) and one-year post-disturbance (n = 3, TAN2005). Sediment flux measurements were taken from subsampled multicores (0-10 cm layer) using sealed stirred aquaria maintained at bottom water conditions in the controlled temperature laboratory on RV Tangaroa. Sediment community oxygen consumption (SCOC) was measured via a sensor inserted through a sampling port in the chamber lid (FireStingO2, Pyroscience) upon commencement of the incubation and approximately every 2 hours until seawater oxygen concentration was depleted to 85-90% of the initial concentration to obtain a time-series of 3-6 measurements of oxygen consumption. Absolute concentrations of nutrients: ammonium ([NH4-N]), nitrite + nitrate ([NOx-N]), and phosphate ([PO4-P]), from overlying seawater samples (15 mL, 0.45 μm filtered, frozen at -20°C upon collection) taken at time 0 and upon termination of the SCOC experiment were quantified using an auto-analyser. |
| title | Sediment disturbance experiment data with samples from the Chatham Rise, Southwest Pacific |
| topic | Ammonium; Ammonium, flux; Bacteria; Biomass, wet mass; Biomass, wet mass per area; Calculated; Community, oxygen consumption; DATE/TIME; Date/Time local; deep sea mining; Depth, bathymetric; Device type; Event label; Flow-cytometer; Habitat modification; Identification; LATITUDE; Location; LONGITUDE; Macrofauna; Nitrate and Nitrite; Nitrite and nitrate, flux; Number of species; Number of species per area; Phosphorus, reactive; Phosphorus, reactive, dissolved, flux; ROBES; Seal segmented flow colorimetric auto-analyser; Sediment; sediment community oxygen consumption; Shannon Diversity Index; Site; Species richness; Station label; TAN1903; TAN1903_121; TAN1903_122; TAN1903_123; TAN1903_124; TAN1903_133; TAN1903_134; TAN1903_135; TAN1903_136; TAN1903_137; TAN1903_138; TAN1903_139; TAN1903_140; TAN1903_141; TAN1903_143; TAN1903_144; TAN1903_35; TAN1903_36; TAN1903_56; TAN1903_57; TAN1903_58; TAN1903_59; TAN1903_60; TAN1903_61; TAN1903_62; TAN1903_63; TAN1903_64; TAN1903_76; TAN1903_77; TAN1903_78; TAN1903_80; TAN1903_81; TAN2005; TAN2005_137; TAN2005_138; TAN2005_139; TAN2005_140; TAN2005_141; TAN2005_36; TAN2005_37; TAN2005_39; TAN2005_56; TAN2005_58; TAN2005_61; TAN2005_78; TAN2005_81; TAN2005_82; TAN2005_85; TAN2005_88; TAN2005_90; Tangaroa; Time point, descriptive; Type; Type of study |
| url | https://doi.org/10.1594/PANGAEA.975706 |