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(WMS) - MSRL: D5-Eutrophierung - Seegras, Grünalgen - max. Bedeckung pro Jahr (LKN.SH - NPV)

Der Darstellungs-Dienst beinhaltet folgende Eutrophierungsparameter: max. Bedeckungsgrad von Seegras bzw. Grünalgen und ist relevant für den MSRL-Deskriptor 5 im Nationalpark Schleswig-Holsteinisches Wattenmeer. Der Dienst wurde im Rahmen des Projektes MDI-DE (Marine Daten-Infrastruktur Deutschland) erstellt. Die Daten werden im Rahmen des trilateralen Makrophyten-Monitoring-Programmes (TMAP) mittels Flugzeugkartierungen erhoben. Dieser Dienst gibt von den drei Kartierungen nur die Daten eines Fluges pro Jahr aus, bei dem der Bedeckungsgrad am höchsten war. Der Bedeckungsgrad wird in 2 Dichteklassen der geschlossenen Bestände angegeben. Die Identifizierung der Flächen ist erst ab ca. 20% Deckung möglich. Die Daten wurden auf Basis einzelner Shapes in einer Datenbank zusammengeführt. Aus den Jahren 1989 und 1990 liegen ähnliche, aber in der Klassifikation abweichende, Kartierungen im Rahmen der Ökosystemforschung Schleswig-Holsteinsches Wattenmeer vor. Dieser Dienst stellt sowohl für Seegras als auch für Grünalgen eine Kartenansicht der max. Bedeckung ab dem Jahr 1994 mit einzelnen Jahres-Layern bereit.

(WFS) - MSRL: D5-Eutrophierung - Seegras, Grünalgen - max. Bedeckung pro Jahr (LKN.SH - NPV)

Der Download-Dienst beinhaltet folgende Eutrophierungsparameter: max. Bedeckungsgrad von Seegras bzw. Grünalgen und ist relevant für den MSRL-Deskriptor 5 im Nationalpark Schleswig-Holsteinisches Wattenmeer. Der Dienst wurde im Rahmen des Projektes MDI-DE (Marine Daten-Infrastruktur Deutschland) erstellt. Die Daten werden im Rahmen des trilateralen Makrophyten-Monitoring-Programmes (TMAP) mittels Flugzeugkartierungen erhoben. Dieser Dienst gibt von den drei Kartierungen nur die Daten eines Fluges pro Jahr aus, bei dem der Bedeckungsgrad am höchsten war. Der Bedeckungsgrad wird in 2 Dichteklassen der geschlossenen Bestände angegeben. Die Identifizierung der Flächen ist erst ab ca. 20% Deckung möglich. Die Daten wurden auf Basis einzelner Shapes in einer Datenbank zusammengeführt. Aus den Jahren 1989 und 1990 liegen ähnliche, aber in der Klassifikation abweichende, Kartierungen im Rahmen der Ökosystemforschung Schleswig-Holsteinsches Wattenmeer vor. Dieser Dienst stellt sowohl für Seegras als auch für Grünalgen je eine Gesamttabelle ab dem Jahr 1994 bereit, also auch einzelne Jahreslayer: Seegras: ZOS_ALLYEARS_MAXCOVab1994 und Grünalgen: GRALG_ALLYEARS_MAXCOVab1994.

Seagrass blue carbon stocks in the German Baltic Sea

A total of 169 sediment cores (30 cm length; 5.5 cm inner diameter) were sampled in seagrass meadows (n = 110 cores) and nearby unvegetated sediments (n = 59 cores). Nine cores (with some exceptions) were collected at each site, from three sublocations: (1) in the high-density part of the meadow ("dense seagrass" hereafter), (2) low density or fringe of the meadow ("sparse seagrass" hereafter), and (3) adjacent unvegetated sediments at least 5 m from seagrass ("unvegetated"). Dense and sparse seagrass sublocations are collectively referred to as "seagrass-vegetated" sediments or sublocations. Sediment cores taken within the seagrass meadow were sampled at least 10 m apart from each other. Several biophysical parameters were collected alongside each core, including seawater depth, sediment grain size, current velocity at the seafloor, and seagrass complexity. The measure of "seagrass complexity" was defined as the product of seagrass canopy height and shoot density, to obtain the sum of leaf heights within a unit of area (in m/m2). Cores were collected between 1 and 5 m seawater depth manually via self-contained underwater breathing apparatus (SCUBA) divers pounding impact-resistant PVC tubes into the sediment with a rubber mallet. Sediment total Corg was determined using an Elemental Analyzer (EURO EA Elemental Analyzer).

Experiment on seagrass (Zostera marina) response to chronically elevated temperature: salinity in benthocosms

This study simulated a 9-months warming scenario on the common seagrass Zostera marina from winter into summer (December 2015 - August 2016) in the Western Baltic Sea (Kiel Fijord), using outdoor mesocosms. Two treatments were applied: Ambient temperature regime (Ambient) and Ambient + 3.6C (Heat) over the entire course of the experiment. Temperature regimes were compared to the 22-year temperature average in the area. This dataset shows daily values of salinity in each benthocosms and in the adjacent fjord. Benthocosms A1, A2, C1, C2, E1, E2 = Heat; Benthocosms B1, B2, D1, D2, F1, F2 = Ambient.

Experiment on seagrass (Zostera marina) response to chronically elevated temperature: shoots abundance and reproduction

This study simulated a 9-months warming scenario on the common seagrass Zostera marina from winter into summer (December 2015 - August 2016) in the Western Baltic Sea (Kiel Fijord), using outdoor mesocosms. Two treatments were applied: Ambient temperature regime (Ambient) and Ambient + 3.6C (Heat) over the entire course of the experiment. Temperature regimes were compared to the 22-year temperature average in the area. This dataset shows monthly or bi-monthly measurements taken of each shoot: Number of shoots [no. per box], Number of new shoots at counting event [no. per box], number of new shoots per month [no. per box per month], and number of flowering shoots [no. per box]. Derived data in %: Number of shoots [% of original shoots], number of new shoots [% of original shoots], number of flowering shoots [% of original shoots]. The organization of the data is hierarchical: Treatment (Heat, Ambient), Benthocosms number (6 benthocosms per treatment), Seagrass box number (4 boxes per benthocosm), shoot number (originally 6 shoots per box, some were lost throughout the experiment).

Experiment on seagrass (Zostera marina) response to chronically elevated temperature: pigments

This study simulated a 9-months warming scenario on the common seagrass Zostera marina from winter into summer (December 2015 - August 2016) in the Western Baltic Sea (Kiel Fijord), using outdoor mesocosms. Two treatments were applied: Ambient temperature regime (Ambient) and Ambient + 3.6C (Heat) over the entire course of the experiment. Temperature regimes were compared to the 22-year temperature average in the area. This dataset shows monthly chlorophyll-a and beta-carotene concentration of one shoot per box. Unit is µg per mg of leaf dry weight. The organization of the data is hierarchical: Treatment (Heat, Ambient), Benthocosms number (6 benthocosms per treatment), Seagrass box number (4 boxes per benthocosm).

Experiment on seagrass (Zostera marina) response to chronically elevated temperature: nutrients in benthocosms

This study simulated a 9-months warming scenario on the common seagrass Zostera marina from winter into summer (December 2015 - August 2016) in the Western Baltic Sea (Kiel Fijord), using outdoor mesocosms. Two treatments were applied: Ambient temperature regime (Ambient) and Ambient + 3.6C (Heat) over the entire course of the experiment. Temperature regimes were compared to the 22-year temperature average in the area. This dataset shows concentrations of NO2+NO3, NH4, PO4 of each treatment (Ambient, Heat) as the mean and confidence interval (CI) across all benthocosms per treatment (n=6).

Experiment on seagrass (Zostera marina) response to chronically elevated temperature: temperature regimes in benthocosms

This study simulated a 9-months warming scenario on the common seagrass Zostera marina from winter into summer (December 2015 - August 2016) in the Western Baltic Sea (Kiel Fijord), using outdoor mesocosms. Two treatments were applied: Ambient temperature regime (Ambient) and Ambient + 3.6C (Heat) over the entire course of the experiment. Temperature regimes were compared to the 22-year temperature average in the area. This dataset shows continues temperature data for each benthocosm and the adjacent fjord. Benthocosms A1, A2, C1, C2, E1, E2 = Heat; Benthocosms B1, B2, D1, D2, F1, F2 = Ambient.

Experiment on seagrass (Zostera marina) response to chronically elevated temperature: growth characteristics

This study simulated a 9-months warming scenario on the common seagrass Zostera marina from winter into summer (December 2015 - August 2016) in the Western Baltic Sea (Kiel Fijord), using outdoor mesocosms. Two treatments were applied: Ambient temperature regime (Ambient) and Ambient + 3.6C (Heat) over the entire course of the experiment. Temperature regimes were compared to the 22-year temperature average in the area. This dataset shows monthly or bi-monthly measurements taken of each shoot: Growth [cm per day], time to grow new leaf (PL, [days]), lenghts of 3rd leaf [cm] and number of green leaves [no. per shoot]. The organization of the data is hierarchical: Treatment (Heat, Ambient), Benthocosms number (6 benthocosms per treatment), Seagrass box number (4 boxes per benthocosm), shoot number (originally 6 shoots per box, some were lost throughout the experiment).

Experiment on seagrass (Zostera marina) response to chronically elevated temperature: oxygen in benthocosms

This study simulated a 9-months warming scenario on the common seagrass Zostera marina from winter into summer (December 2015 - August 2016) in the Western Baltic Sea (Kiel Fijord), using outdoor mesocosms. Two treatments were applied: Ambient temperature regime (Ambient) and Ambient + 3.6C (Heat) over the entire course of the experiment. Temperature regimes were compared to the 22-year temperature average in the area. This dataset shows concentration of dissolved oxygen per treatment (Ambient, Heat) as the mean and confidence interval (CI) across all benthcosms per treatment (n=6).

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