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Laube, Britta; Mach, Elke; Rossberg, Reingard; Gessner, Mark O; Grossart, Hans-Peter (2021): TemBi 2014 mesocosm study: Summer storm impact on primary production rates and enzyme activities in Lake Stechlin. PANGAEA, https://doi.org/10.1594/PANGAEA.930933, 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. Primary production rates as well as exoenzyme activities (alkaline phosphatase, beta-glucosidase, leucine aminopeptidase) were monitored for 42 days after the experimental disturbance event by incubation of size-fractionated sample with H14CO3- and MUF substrate analogue assays, respectively. Mixing disrupted the thermal stratification, increased concentrations of dissolved nutrients and CO2 and changed light conditions in the epilimnion. Thus, mixing stimulated phytoplankton production, resulting in higher primary production rates within one week after mixing.
Keyword(s):
climate change; cyanobacteria; deep chlorophyll maximum (DCM); disturbance; enclosure experiment; lake; mesocosm study; primary production
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: 2014-08-04T00:00:00 * Date/Time End: 2014-09-16T00:00:00
Minimum DEPTH, water: 2.0 m * Maximum DEPTH, water: 16.0 m
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
7DEPTH, waterDepth watermGrossart, Hans-PeterGeocode
8Michealis-Menten constant of alkaline phosphatase potential exoenzyme activityap.Kmµmol/lGessner, Mark OMUF substrate analogue assay
9Kinetic constants-maximum enzyme velocity of alkaline phosphatase potential exoenzyme activityap.Vmaxµmol/lGessner, Mark OMUF substrate analogue assay
10Michealis-Menten constant of beta-glucosidase potential exoenzyme activitybg.Kmµmol/lGessner, Mark OMUF substrate analogue assay
11Kinetic constants-maximum enzyme velocity of alkaline phosphatase exoenzyme activitybg.Vmaxµmol/lGessner, Mark OMUF substrate analogue assay
12Michealis-Menten constant of leucine aminopeptidase potential exoenzyme activityleu.Kmµmol/lGessner, Mark OMUF substrate analogue assay
13Kinetic constants-maximum enzyme velocity of leucine aminopeptidase potential exoenzyme activityleu.Vmaxµmol/lGessner, Mark OMUF substrate analogue assay
14Primary production of carbonPP Cmg/m3Gessner, Mark OIncubation of size-fractionated sample with H14CO3-0.2 µm - 3 µm
15Primary production of carbonPP Cmg/m3Gessner, Mark OIncubation of size-fractionated sample with H14CO3->3 µm
16Primary production of carbonPP Cmg/m3Gessner, Mark OSample incubation with H14CO3-Total
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2903 data points

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