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. Size-fractionated Bacterial Protein Production (BPP) of particle associated (PA, >3.0 µm) and free-living bacteria (FL, 0.2-3.0 µm) (14C-Leu incorporation) as well as abundances of PA (microscopy of DAPI stained cells on 3.0 µm polycarbonate filters) and FL heterotrophic prokaryotes and picocyanobacteria (flow cytometry of SYBR green I stained cells) were monitored for 42 days after the experimental disturbance event. Mixing increased bacterial abundance and production about 3 weeks after mixing, which was associated to a mixing-induced stimulation of phytoplankton growth in the mixed enclosures compared to the controls. Simultaneously, decreased abundances of picocyanobacteria could be observed in mixed enclosures.
Global identifier:
Doi(
"10.1594/PANGAEA.930921",
)
DataMeasurements(
DataMeasurements {
domain: Unspecified,
station: None,
measured_variables: [
"Bacteria, free-living, abundance",
"Bacterial abundance of HDNA-Bacteria",
"Bacterial abundance of LDNA-Bacteria",
"DATE/TIME",
"DEPTH, water",
"Day of experiment",
"Day of the year",
"Description",
"Mesocosm label",
"Nostocales biovolume",
"Nostocales cell abundance",
"Particle-associated bacterial abundance",
"Picocyanobacteria abundance",
"Protein production, free-living bacteria",
"Protein production, particle associated bacteria",
"Treatment",
],
methods: [
"14C-leucine incorporation",
"Epifluorescence microscopy after DAPI staining",
"Flow cytometry",
"derived",
],
},
)
Comment: Empty cells = NA
Tags: Polycarbonat ? Chlorophyll ? Filterbrunnen ? Seen ? Cyanobakterien ? Phytoplankton ? Bakterien ? Sturm ? Studie ? Klimawandel ? Wasseraufbereitung ? DCM ? bacterial production ? disturbance ? enclosure experiment ? mesocosm experiment ? summer storm ?
Region: Federal Republic of Germany
Bounding boxes: 13.0281° .. 13.0281° x 53.1433° .. 53.1433° 10.5° .. 10.5° x 51.5° .. 51.5°
License: Creative Commons Namensnennung 4.0
Language: Englisch/English
Issued: 2021-04-29
Modified: 2025-08-22
Time ranges: 2014-08-04 - 2014-09-16
Accessed 1 times.