KATHRIN LENGFELLNER results 7
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When is a type III functional response stabilizing? Theory and practice of predicting plankton dynamics under enrichmentNARA Subscribed
The curvature of generalized Holling type functional response curves is controlled by a shape parameter b yielding hyperbolic type II ( b = 1) to increasingly sigmoid type III ( b > 1) responses. Empirical estimates of b vary considerably across taxa. Larger consumer–resource body mass ratios have been suggested to generate more pronounced type III responses and therefore to promote dynamic stability. The dependence of consume...
Biotic interactions may overrule direct climate effects on spring phytoplankton dynamicsNARA Subscribed
To improve our mechanistic understanding and predictive capacities with respect to climate change effects on the spring phytoplankton bloom in temperate marine systems, we used a process‐driven dynamical model to disentangle the impact of potentially relevant factors which are often correlated in the field. The model was based on comprehensive indoor mesocosm experiments run at four temperature and three light regimes. It was...
Climate change and the timing, magnitude, and composition of the phytoplankton spring bloomNARA Subscribed
In this article, we show by mesocosm experiments that winter and spring warming will lead to substantial changes in the spring bloom of phytoplankton. The timing of the spring bloom shows only little response to warming as such, while light appears to play a more important role in its initiation. The daily light dose needed for the start of the phytoplankton spring bloom in our experiments agrees well with a recently published...
Physiological response of the copepod Pseudocalanus sp. in the Baltic Sea at different thermal scenariosNARA Subscribed
We studied the physiological response of Pseudocalanus sp. under four different temperature elevation regimes: +0, +2, +4 and +6 °C above the decadal average temperature in the Western Baltic Sea. We measured fecal pellet (FP) production rates, which was taken as a proxy of ingestion, egg production (EPR) and respiration rates. Experiments lasted from mid‐February to end April, corresponding most of the observations to the pos...
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