Description: These data sets are based on approx. 1400 stations sampled in the German Baltic Sea by the Leibniz Institute for Baltic Sea Research (IOW) during the past 15 years (as part of the regular monitoring or within different research programmes). Benthic samples were taken with a 0.1 m² van Veen grab. Depending on sediment composition, grabs of different weights were used. As a standard three replicates of grab samples were taken at each station. Additionally a dredge haul (net mesh size 5 mm) was taken in order to obtain mobile or rare species. All samples were sieved through a 1 mm screen and animals were preserved in the field with 4% formaldehyde. For sorting in the laboratory, a stereomicroscope with 10–40 magnification was used, species were counted and weighted. Total ash free dry weight biomass was derived using random forests statistical analysis (Breiman, 2001) in R environment (Version 3.0.2, The R Foundation for Statistical Computing, 2013) and the package ‘random Forest’ (RF, Version 4.6–7, Liaw and Wiener, 2002). Total biomass shows AFDW biomass g per m².Environmental data used as predictors: Substrate (Tauber 2012), Depth (FEMA project), Salinity mean, temperature mean JJA, bottom velocity max (GETM, Klingbeil et al. 2013) Light penetration depth (mean over growth period), oxygen deficit zones (number of days / year smaller 2 ml / l) and detritus rate (mm / year) (ERGOM, Friedland et al. 2012).
Global identifier:
Other(
"IOW-GIS-SECOS-7",
)
Origin: /Wissenschaft/Leibniz-Gemeinschaft/Institut für Ostseeforschung
Tags: Asche ? Detritus ? Formaldehyd ? Bundesrepublik Deutschland ? Baggerung ? Benthos ? Salzgehalt ? Umweltdaten ? Sediment ? Tier ? Biomasse ? Forschungsprogramm ? Verpackung ? Ostsee ? Downloadable Data ? SECOS ? benthic macrofauna communities ? total ash free dry weight biomass ? total biomass ?
Bounding boxes: 9.40524° .. 14.81398° x 53.672271° .. 55.082324°
License: unbekannt
Language: Englisch/English
Modified: 2018-07-09
Time ranges: 2018-07-09 - 2018-07-09
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