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TemBi 2014 mesocosm study: Summer storm impact on sedimentation rates of particulate matter in Lake Stechlin

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).

Global identifier: 

Doi(
    "10.1594/PANGAEA.930931",
)

Types: 
Measurements(
    Measurements {
        domain: Unspecified,
        station: None,
        measured_variables: [
            "DATE/TIME",
            "Day of experiment",
            "Oxygen/Nitrogen ratio",
            "Description",
            "Mesocosm label",
            "Treatment",
            "Nitrogen, total, particulate",
            "Phosphorus, total, particulate",
            "Carbon, total, particulate",
            "Carbon, inorganic, particulate",
            "Calcium carbonate, particulate",
            "Carbon, organic, particulate",
        ],
        methods: [
            "Peroxodisulfate oxidation method; Flow-injection analyzer; 0.3 µm GF-75 filters (Sterlitech)",
            "Peroxodisulfate oxidation method; Flow-injection analyzer; 0.3 µm GF-75 filters (Sterlitech)",
            "ELTRA-800 (0.3 µm GF-75 filters (Sterlitech))",
            "Infralyt 50 (SAXON Junkalor GmbH), (0.3 µm GF-75 filters (Sterlitech))",
            "Derived from PIC by molar conversion",
            "Difference derived from TPC and PIC",
        ],
    },
)
Dataset

Comment: Further Project information: Core Facility grant; Award: GE 1775/2-1

Origins: /Wissenschaft/PANGAEA

Tags: Calciumcarbonat ? Gesamtphosphor ? Seen ? Cyanobakterien ? Nährstoff ? Phytoplankton ? Stickstoff ? Sturm ? Störung ? Studie ? Wasser ? Biomasse ? Klimawandel ? Partikel ? Sedimentation ? deep chlorophyll maximum (DCM) ? enclosure experiment ? mesocosm study ? sedimentation rates ?

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: cc-by/4.0

Language: Englisch/English

Organisations

Persons

Issued: 2021-04-30

Modified: 2023-01-20

Time ranges: 2014-08-13 - 2014-09-17

Resources

Status

Quality score

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