Vonnahme, Tobias (2018): Effects of simulated deep-sea mining impacts on microbial communities and functions in the DISCOL experimental area [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.887412
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Abstract:
Deep-sea mining for manganese nodules appears to be an attractive option to supply the growing demand for metal resources. The technologies are advancing and the costs for deep-sea mining are dropping. The effect on the deep-sea ecosystems, in particular on microbial processes is hardly understood, making environmental management and monitoring efforts hard to focus. Long-term mining simulations can be used to assess the effects of deep-sea mining and the potential for recovery. We revisited a large-scale disturbance and recolonization (DISCOL) experimental area in the Peru Basin, 26 years after the disturbance and compared the disturbances with fresh tracks and reference areas. State of the art technologies and methods, such as, operations with a remotely operated vehicle (ROV), in situ flux measurements, estimation of biogeochemical parameters and activities, and investigation of microbial community structures via next generation sequencing, allowed the investigation of disturbances, related to deep-sea mining operations. During the disturbance simulations, surface sediment was removed, and suboxic subsurface layers were exposed. These deeper sediment layers had different microbial communities, lower amount of labile organic matter, less microbial biomass, and reduced activities. After 26 years, the organic matter did not rebuild, and cell numbers ,activities, and the assimilation efficiency stayed low. Only the community structure appeared to be recovered.
Project(s):
JPI Oceans - Ecological Aspects of Deep-Sea Mining (JPIO-MiningImpact)
Coverage:
Median Latitude: -7.081122 * Median Longitude: -88.457914 * South-bound Latitude: -7.125533 * West-bound Longitude: -88.526767 * North-bound Latitude: -7.065900 * East-bound Longitude: -88.412967
Date/Time Start: 2015-08-31T00:00:00 * Date/Time End: 2015-09-28T06:36:41
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.150 m
Event(s):
SO242/2_142_PUC-12-14-55 * Latitude: -7.074000 * Longitude: -88.463900 * Date/Time: 2015-08-31T00:00:00 * Elevation: -4151.0 m * Location: South Pacific Ocean, Peru Basin * Campaign: SO242/2 (JPI-OCEANS) * Basis: Sonne_2 * Method/Device: Push corer (PUC) * Comment: Sediment pooled from SO242/2_232_PUC-12, SO242/2_232_PUC-14, SO242/2_232_PUC-55
SO242/2_142_PUC-18-34-46 * Latitude: -7.074000 * Longitude: -88.463900 * Date/Time: 2015-08-31T00:00:00 * Elevation: -4151.0 m * Location: South Pacific Ocean, Peru Basin * Campaign: SO242/2 (JPI-OCEANS) * Basis: Sonne_2 * Method/Device: Push corer (PUC) * Comment: Sediment pooled from SO242/2_232_PUC-18, SO242/2_232_PUC-34, SO242/2_232_PUC-46
SO242/2_142_PUC-24-53 * Latitude: -7.074000 * Longitude: -88.463900 * Date/Time: 2015-08-31T00:00:00 * Elevation: -4151.0 m * Location: South Pacific Ocean, Peru Basin * Campaign: SO242/2 (JPI-OCEANS) * Basis: Sonne_2 * Method/Device: Push corer (PUC) * Comment: Sediment pooled from SO242/2_232_PUC-24, SO242/2_232_PUC-53
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4954 data points
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