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Raulf, Felix F; Fabricius, Katharina Elisabeth; Uthicke, Sven; de Beer, Dirk; Abed, Raeid M M; Ramette, Alban (2016): Environmental data from coastal sediments along natural CO2 gradients at a volcanic vent in Papua New Guinea [dataset]. PANGAEA,, Supplement to: Raulf, FF et al. (2015): Changes in microbial communities in coastal sediments along natural CO2 gradients at a volcanic vent in Papua New Guinea. Environmental Microbiology, 17(10), 3678-3691,

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Natural CO2 venting systems can mimic conditions that resemble intermediate to high pCO2 levels as predicted for our future oceans. They represent ideal sites to investigate potential long-term effects of ocean acidification on marine life. To test whether microbes are affected by prolonged exposure to pCO2 levels, we examined the composition and diversity of microbial communities in oxic sandy sediments along a natural CO2 gradient. Increasing pCO2 was accompanied by higher bacterial richness and by a strong increase in rare members in both bacterial and archaeal communities. Microbial communities from sites with CO2 concentrations close to today's conditions had different structures than those of sites with elevated CO2 levels. We also observed increasing sequence abundance of several organic matter degrading types of Flavobacteriaceae and Rhodobacteraceae, which paralleled concurrent shifts in benthic cover and enhanced primary productivity. With increasing pCO2, sequences related to bacterial nitrifying organisms such as Nitrosococcus and Nitrospirales decreased, and sequences affiliated to the archaeal ammonia-oxidizing Thaumarchaeota Nitrosopumilus maritimus increased. Our study suggests that microbial community structure and diversity, and likely key ecosystem functions, may be altered in coastal sediments by long-term CO2 exposure to levels predicted for the end of the century.
Median Latitude: -9.690917 * Median Longitude: 150.746018 * South-bound Latitude: -9.827840 * West-bound Longitude: 150.520290 * North-bound Latitude: -9.440960 * East-bound Longitude: 150.869070
Date/Time Start: 2010-08-15T14:00:00 * Date/Time End: 2011-04-27T14:00:00
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.030 m
Dobu * Latitude: -9.515400 * Longitude: 150.608100 * Date/Time Start: 2010-01-01T00:00:00 * Date/Time End: 2014-12-31T00:00:00 * Elevation: -2.0 m * Location: South Pacific
EsaAla * Latitude: -9.824600 * Longitude: 150.181300 * Date/Time Start: 2010-01-01T00:00:00 * Date/Time End: 2010-12-31T00:00:00 * Elevation: -4.0 m * Location: South Pacific
Upa-Upasina * Latitude: -9.824600 * Longitude: 150.818100 * Date/Time Start: 2010-01-01T00:00:00 * Date/Time End: 2014-12-31T00:00:00 * Elevation: -3.0 m * Location: South Pacific
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DATE/TIMEDate/TimeRaulf, Felix FGeocode – The sampling time was between 2 and 4 pm at each site and day, respectively.
2Event labelEventRaulf, Felix F
3Sample IDSample IDRaulf, Felix F
4LATITUDELatitudeRaulf, Felix FGeocode
5LONGITUDELongitudeRaulf, Felix FGeocode
6Depth, bathymetricBathy depthmRaulf, Felix F
7DEPTH, sediment/rockDepth sedmRaulf, Felix FGeocode
8pHpHRaulf, Felix F
9Carbon, totalTC%Raulf, Felix F
10Carbon, organic, totalTOC%Raulf, Felix F
11Nitrogen, totalTN%Raulf, Felix F
12MagnesiumMgmg/kgRaulf, Felix F
13AluminiumAlmg/kgRaulf, Felix F
14SiliconSimg/kgRaulf, Felix F
15PotassiumKmg/kgRaulf, Felix F
16CalciumCamg/kgRaulf, Felix F
17TitaniumTimg/kgRaulf, Felix F
18ManganeseMnmg/kgRaulf, Felix F
19IronFemg/kgRaulf, Felix F
20RubidiumRbmg/kgRaulf, Felix F
21StrontiumSrmg/kgRaulf, Felix F
22PhosphorusPmg/kgRaulf, Felix F
23Sulfur, totalTSmg/kgRaulf, Felix F
198 data points

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