Publication Date:
2024-03-08
Description:
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).
Keywords:
BIBS; Bridging in Biodiversity Science; Calcium carbonate, particulate; Carbon, inorganic, particulate; Carbon, organic, particulate; Carbon, total, particulate; Climate change; Climate changes; Climate driven Changes in Biodiversity of Microbiota; cyanobacteria; DATE/TIME; Day of experiment; deep chlorophyll maximum (DCM); Derived from PIC by molar conversion; Description; Difference derived from TPC and PIC; disturbance; ELTRA-800 (0.3 µm GF-75 filters (Sterlitech)); enclosure experiment; Enclosure experiment; Germany; Infralyt 50 (SAXON Junkalor GmbH), (0.3 µm GF-75 filters (Sterlitech)); Lake_Stechlin; Mesocosm label; mesocosm study; Nitrogen, total, particulate; NITROLIMIT; Oxygen/Nitrogen ratio; Peroxodisulfate oxidation method; Flow-injection analyzer; 0.3 µm GF-75 filters (Sterlitech); Phosphorus, total, particulate; sedimentation; sedimentation rates; Stickstofflimitation in Binnengewässern; TemBi; Treatment
Type:
Dataset
Format:
text/tab-separated-values, 527 data points
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