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Hornick, Thomas; Santaolalla, Gonzalo Idoate; Berger, Stella A; Grossart, Hans-Peter (2021): TemBi 2014 mesocosm study: Summer storm impact on sedimentation rates of particulate matter in Lake Stechlin. PANGAEA, https://doi.org/10.1594/PANGAEA.930931, In: Grossart, Hans-Peter; Hornick, Thomas; Berger, Stella A; Nejstgaard, Jens Christian; Monaghan, Michael T; Miki, Takashi; Giling, Darren P; Selmeczy, Géza B; Padisák, Judit; Kasprzak, Peter; Wurzbacher, Christian; Kirillin, Georgiy; Engelhardt, Christof; Gessner, Mark O (2021): TemBi 2014 mesocosm study - Impact of summer storms on long-term lake ecosystem dynamics. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.931002 (dataset in review)

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Abstract:
We simulated an experimental summer storm in large-volume (~1200 m3, ~16m depth) enclosures in Lake Stechlin (https://www.lake-lab.de) by mixing deeper water masses from the meta- and hypolimnion into the mixed layer (epilimnion). The mixing included the disturbance of a deep chlorophyll maximum (DCM) which was present at the same time of the experiment in Lake Stechlin and situated in the metalimnion of each enclosure during filling. Water physical variables and water chemistry was monitored for 42 days after the experimental disturbance event. Mixing disrupted the thermal stratification, increased concentrations of dissolved nutrients and CO2 and changed light conditions in the epilimnion. Mixing stimulated phytoplankton growth, thus, resulting in a bloom of Dolichospermum sp. and thereafter increased biomass of Bacillariophyceae. Subsequent, break down of both phytoplankton groups resulted in higher particulate matter sinking fluxes of particulate organic carbon (POC), total particulate nitrogen (TPN) and total particulate phosphorous (TPP) 4-5 weeks after the disturbance event. Mixing resulted in average increases in elemental downward fluxes of 9% POC, 14% total particulate Nitrogen (TPN) and 19% TPP by the end of the experiment (42 days) (n.control=4, n.mixed=4).
Keyword(s):
climate change; Climate changes; cyanobacteria; deep chlorophyll maximum (DCM); disturbance; enclosure experiment; mesocosm study; sedimentation; sedimentation rates
Related to:
Grossart, Hans-Peter; Hornick, Thomas; Berger, Stella A; Nejstgaard, Jens Christian; Monaghan, Michael T; Miki, Takashi; Giling, Darren P; Selmeczy, Géza B; Padisák, Judit; Kasprzak, Peter; Wurzbacher, Christian; Kirillin, Georgiy; Engelhardt, Christof; Gessner, Mark O (submitted): Extreme summer storms elicit algal blooms and shift long-term lake ecosystem dynamics.
Funding:
Federal Ministry of Education and Research (BMBF), grant/award no. 01LC1501G: Bridging in Biodiversity Science
Federal Ministry of Education and Research (BMBF), grant/award no. 033L041B: Stickstofflimitation in Binnengewässern
Leibniz Association (Leibniz Association), grant/award no. SAW-2011-IGB-2: Climate driven Changes in Biodiversity of Microbiota
Coverage:
Latitude: 53.143300 * Longitude: 13.028100
Date/Time Start: 2014-08-13T00:00:00 * Date/Time End: 2014-09-17T00:00:00
Event(s):
Lake_Stechlin * Latitude: 53.143300 * Longitude: 13.028100 * Location: Germany * Method/Device: Enclosure experiment
Comment:
Further Project information:
Core Facility grant; Award: GE 1775/2-1
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DATE/TIMEDate/TimeGrossart, Hans-PeterGeocode
2Day of experimentDOEdayGrossart, Hans-Peter
3Oxygen/Nitrogen ratioO2/N2Grossart, Hans-Peter
4DescriptionDescriptionGrossart, Hans-PeterWater layer
5Mesocosm labelMeso labelGrossart, Hans-PeterLakeLab mesocosm number
6TreatmentTreatGrossart, Hans-Peter
7Nitrogen, total, particulateTPNmg/m2Grossart, Hans-PeterPeroxodisulfate oxidation method; Flow-injection analyzer; 0.3 µm GF-75 filters (Sterlitech)Sinking flux at 16 m since the last time point (or at t8 since the start of the experimen (t0), respecively).
8Phosphorus, total, particulateTPPmg/m2Grossart, Hans-PeterPeroxodisulfate oxidation method; Flow-injection analyzer; 0.3 µm GF-75 filters (Sterlitech)Sinking flux at 16 m since the last time point (or at t8 since the start of the experimen (t0), respecively).
9Carbon, total, particulateTPCmg/m2Grossart, Hans-PeterELTRA-800 (0.3 µm GF-75 filters (Sterlitech))Sinking flux at 16 m since the last time point (or at t8 since the start of the experimen (t0), respecively).
10Carbon, inorganic, particulatePICmg/m2Grossart, Hans-PeterInfralyt 50 (SAXON Junkalor GmbH), (0.3 µm GF-75 filters (Sterlitech))Sinking flux at 16 m since the last time point (or at t8 since the start of the experimen (t0), respecively).
11Calcium carbonate, particulateCaCO3 partmg/m2Grossart, Hans-PeterDerived from PIC by molar conversionSinking flux at 16 m since the last time point (or at t8 since the start of the experimen (t0), respecively).
12Carbon, organic, particulatePOCmg/m2Grossart, Hans-PeterDifference derived from TPC and PICSinking flux at 16 m since the last time point (or at t8 since the start of the experimen (t0), respecively).
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
527 data points

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