Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/28000
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dc.contributor.authorStratmann, Tanjapt_PT
dc.contributor.authorLins, Lidiapt_PT
dc.contributor.authorPurser, Autunpt_PT
dc.contributor.authorMarcon, Yannpt_PT
dc.contributor.authorRodrigues, Clara F.pt_PT
dc.contributor.authorRavara, Ascensãopt_PT
dc.contributor.authorCunha, Marina R.pt_PT
dc.contributor.authorSimon-Lledó, Erikpt_PT
dc.contributor.authorJones, Daniel O. B.pt_PT
dc.contributor.authorSweetman, Andrew K.pt_PT
dc.contributor.authorKöser, Kevinpt_PT
dc.contributor.authorvan Oevelen, Dickpt_PT
dc.date.accessioned2020-03-18T17:28:53Z-
dc.date.available2020-03-18T17:28:53Z-
dc.date.issued2018-07-06-
dc.identifier.issn1726-4170pt_PT
dc.identifier.urihttp://hdl.handle.net/10773/28000-
dc.description.abstractFuture deep-sea mining for polymetallic nodules in abyssal plains will negatively impact the benthic ecosystem, but it is largely unclear whether this ecosystem will be able to recover from mining disturbance and if so, to what extent and at what timescale. During the “DISturbance and reCOLonization” (DISCOL) experiment, a total of 22% of the seafloor within a 10.8 km2 circular area of the nodulerich seafloor in the Peru Basin (SE Pacific) was ploughed in 1989 to bury nodules and mix the surface sediment. This area was revisited 0.1, 0.5, 3, 7, and 26 years after the disturbance to assess macrofauna, invertebrate megafauna and fish density and diversity. We used this unique abyssal faunal time series to develop carbon-based food web models for each point in the time series using the linear inverse modeling approach for sediments subjected to two disturbance levels: (1) outside the plough tracks; not directly disturbed by plough, but probably suffered from additional sedimentation; and (2) inside the plough tracks. Total faunal carbon stock was always higher outside plough tracks compared with inside plough tracks. After 26 years, the carbon stock inside the plough tracks was 54% of the carbon stock outside plough tracks. Deposit feeders were least affected by the disturbance, with modeled respiration, external predation, and excretion rates being reduced by only 2.6% inside plough tracks compared with outside plough tracks after 26 years. In contrast, the respiration rate of filter and suspension feeders was 79.5% lower in the plough tracks after 26 years. The “total system throughput” (T ..), i.e., the total sum of modeled carbon flows in the food web, was higher throughout the time series outside plough tracks compared with the corresponding inside plough tracks area and was lowest inside plough tracks directly after the disturbance (8.63 10􀀀3 1.58 10􀀀5 mmol Cm􀀀2 d􀀀1). Even 26 years after the DISCOL disturbance, the discrepancy of T .. between outside and inside plough tracks was still 56 %. Hence, C cycling within the faunal compartments of an abyssal plain ecosystem remains reduced 26 years after physical disturbance, and a longer period is required for the system to recover from such a small-scale sediment disturbance experiment.pt_PT
dc.language.isoengpt_PT
dc.publisherCopernicus Publicationspt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/5876/147273/PTpt_PT
dc.relationJPI Oceans – Ecological Aspects of Deep Sea Mining project “MiningImpact” (NWO-ALW grant 856.14.002)pt_PT
dc.relationBundesministerium für Bildung und Forschung (BMBF) grant no. 03F0707A-Gpt_PT
dc.relationPOCI-01-0145-FEDER-007638pt_PT
dc.relationSFRH/BPD/107805/2015pt_PT
dc.relationinfo:eu-repo/grantAgreement/EC/FP7/603418/EUpt_PT
dc.rightsopenAccesspt_PT
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectNodulespt_PT
dc.subjectPacificpt_PT
dc.subjectBenthic communitiespt_PT
dc.titleAbyssal plain faunal carbon flows remain depressed 26 years after a simulated deep-sea mining disturbancept_PT
dc.typearticlept_PT
dc.description.versionpublishedpt_PT
dc.peerreviewedyespt_PT
degois.publication.firstPage4131pt_PT
degois.publication.issue13pt_PT
degois.publication.lastPage4145pt_PT
degois.publication.titleBiogeosciencespt_PT
degois.publication.volume15pt_PT
dc.relation.publisherversionhttps://doi.org/10.5194/bg-15-4131-2018pt_PT
dc.identifier.doi10.5194/bg-15-4131-2018pt_PT
dc.identifier.essn1726-4189pt_PT
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