TY  - JOUR
A1  - Aichner, Bernhard
A1  - Dubbert, David
A1  - Kiel, Christine
A1  - Kohnert, Katrin
A1  - Ogashawara, Igor
A1  - Jechow, Andreas
A1  - Harpenslager, Sarah-Faye
A1  - Hölker, Franz
A1  - Nejstgaard, Jens Christian
A1  - Grossart, Hans-Peter
A1  - Singer, Gabriel
A1  - Wollrab, Sabine
A1  - Berger, Stella Angela
T1  - Spatial and seasonal patterns of water isotopes in northeastern German lakes
JF  - Earth system science data : ESSD
N2  - Water stable isotopes (delta O-18 and delta H-2) were analyzed in samples collected in lakes, associated with riverine systems in northeastern Germany, throughout 2020. The dataset (Aichner et al., 2021; https://doi.org/10.1594/PANGAEA.935633) is derived from water samples collected at (a) lake shores (sampled in March and July 2020), (b) buoys which were temporarily installed in deep parts of the lake (sampled monthly from March to October 2020), (c) multiple spatially distributed spots in four selected lakes (in September 2020), and (d) the outflow of Muggelsee (sampled biweekly from March 2020 to January 2021). At shores, water was sampled with a pipette from 40-60 cm below the water surface and directly transferred into a measurement vial, while at buoys a Limnos water sampler was used to obtain samples from 1 m below the surface. Isotope analysis was conducted at IGB Berlin, using a Picarro L2130-i cavity ring-down spectrometer, with a measurement uncertainty of < 0.15 parts per thousand (delta O-18) and < 0.0 parts per thousand (delta H-2). The data give information about the vegetation period and the full seasonal isotope amplitude in the sampled lakes and about spatial isotope variability in different branches of the associated riverine systems.
Y1  - 2022
U6  - https://doi.org/10.5194/essd-14-1857-2022
SN  - 1866-3508
SN  - 1866-3516
VL  - 14
IS  - 4
SP  - 1857
EP  - 1867
PB  - Copernicus
CY  - Göttingen
ER  - 
TY  - JOUR
A1  - Gall, Andrea
A1  - Uebel, Udo
A1  - Ebensen, Uwe
A1  - Hillebrand, Helmut
A1  - Meier, Sandra
A1  - Singer, Gabriel
A1  - Wacker, Alexander
A1  - Striebel, Maren
T1  - Planktotrons
BT  - a novel indoor mesocosm facility for aquatic biodiversity and food web research
JF  - Limnology and oceanography-methods
N2  - We established a new indoor mesocosm facility, 12 fully controlled Planktotrons, designed to conduct marine and freshwater experiments for biodiversity and food web approaches using natural or artificial, benthic or planktonic communities. The Planktotrons are a unique and custom-tailored facility allowing long-term experiments. Wall growth can be inhibited by a rotating gate paddle with silicone lips. Additionally, temperature and light intensity are individually controllable for each Planktotron and the large volume (600 L) enables high-frequency or volume-intense measurements. In a pilot freshwater experiment various trophic levels of a pelagic food web were maintained for up to 90 d. First, an artificially assembled phytoplankton community of 11 species was inoculated in all Planktotrons. After 22 d, two ciliates were added to all, and three Daphnia species were added to six Planktotrons. After 72 d, dissolved organic matter (DOM, an alkaline soil extract) was added as an external disturbance to six of the 12 Planktotrons, involving three Planktotrons stocked with Daphnia and three without, respectively. We demonstrate the suitability of the Planktotrons for food web and biodiversity research. Variation among replicated Planktotrons (n=3 minimum) did not differ from other laboratory systems and field experiments. We investigated population dynamics and interactions among the different trophic levels, and found them affected by the sequence of ciliate and Daphnia addition and the disturbance caused by addition of DOM.
Y1  - 2017
U6  - https://doi.org/10.1002/lom3.10196
SN  - 1541-5856
VL  - 15
SP  - 663
EP  - 677
PB  - Wiley
CY  - Hoboken
ER  - 
TY  - GEN
A1  - Kalinkat, Gregor
A1  - Cabral, Juliano Sarmento
A1  - Darwall, William
A1  - Ficetola, G. Francesco
A1  - Fisher, Judith L.
A1  - Giling, Darren P.
A1  - Gosselin, Marie-Pierre
A1  - Grossart, Hans-Peter
A1  - Jaehnig, Sonja C.
A1  - Jeschke, Jonathan M.
A1  - Knopf, Klaus
A1  - Larsen, Stefano
A1  - Onandia, Gabriela
A1  - Paetzig, Marlene
A1  - Saul, Wolf-Christian
A1  - Singer, Gabriel
A1  - Sperfeld, Erik
A1  - Jaric, Ivan
T1  - Flagship umbrella species needed for the conservation of overlooked aquatic biodiversity
T2  - Conservation biology : the journal of the Society for Conservation Biology
Y1  - 2017
U6  - https://doi.org/10.1111/cobi.12813
SN  - 0888-8892
SN  - 1523-1739
VL  - 31
SP  - 481
EP  - 485
PB  - Wiley
CY  - Hoboken
ER  -