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Berger, Stella A; Lentz, Maren; Nejstgaard, Jens Christian; Gessner, Mark O (2021): TemBi 2014 mesocosm study: Summer storm effect on chlorophyll a development in Lake Stechlin. PANGAEA, https://doi.org/10.1594/PANGAEA.930907, 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. Size-fractionated (0.2-3 µm and >3.0 µm) chlorophyll a (Chla) development 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. Thereby, mixing increased the concentration of Chla of the small size fraction 0.2-3.0 within one week after mixing. After 2-3 weeks, mixing resulted in increased concentrations of Chla also in the large size fraction, which was associated to a bloom of Dolichospermums sp.
Keyword(s):
chlorophyll; climate change; disturbance
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:
Principal Investigators for Chlorophyll a = Berger, Stella; Nejstgaard, Jens; Gessner, Mark
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
8Chlorophyll aChl aµg/lAcetone extraction from polycarbonate filters; fluorescence spectrophotometer (Hitachi F-7000, Tokyo, Japan)0.2 µm - 3.0 µm
9Chlorophyll aChl aµg/lAcetone extraction from polycarbonate filters; fluorescence spectrophotometer (Hitachi F-7000, Tokyo, Japan)> 3.0 µm
10Chlorophyll aChl aµg/lAcetone extraction from polycarbonate filters; fluorescence spectrophotometer (Hitachi F-7000, Tokyo, Japan)Total
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2160 data points

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