A5055645158- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Fish Ecology and Management Studies
- Sustainability and Ecological Systems Analysis
- Evolution and Genetic Dynamics
- Aquatic Invertebrate Ecology and Behavior
- Ecosystem dynamics and resilience
- Animal Nutrition and Physiology
- Meat and Animal Product Quality
- Land Use and Ecosystem Services
- Economic and Environmental Valuation
- Algal biology and biofuel production
- Soil and Water Nutrient Dynamics
- Isotope Analysis in Ecology
- Climate Change and Health Impacts
- Animal Behavior and Welfare Studies
University of Potsdam
2018-2023
Leibniz Association
2014
Abstract Phytoplankton responses to nutrient enrichment are often assumed be universal, but in practice they can significantly vary because the effect size an increased supply of one may depend on availability other. Here, we used two complementary two‐way factorial experiments determine how lake phytoplankton N and P with increasing concentrations other nutrient. We manipulated dissolved a 4‐d bioassay conducted measured/determined chlorophyll carbon (C)‐specific growth rates, size‐classes,...
Habitat loss has been identified as a major contributor to declining freshwater biodiversity, resulting in high threat level among European fishes. Non-natural ecosystems such pit lakes may compensate habitat by providing new for aquatic organisms. We compared the structure of littoral fish communities 18 natural and 19 gravel located northern German lowlands evaluate whether artificial managed angling clubs host similar typically observed lakes. The community was analyzed between lake types...
Abstract Food quantity and quality are highly variable in natural systems. Therefore, their interplay the associated effects on consumer population growth important for predator–prey interactions community dynamics. Experiments which consumers were exposed to elemental nutrient limitations along food gradients suggest that performance relevant only at high quantities. However, nutrients act differently physiological processes than biochemical nutrients. So far, interactive of compounds have...
Biochemical food quality constraints affect the performance of consumers and mediate trait variation among within consumer species. To assess inter- intraspecific differences in fatty acid retention conversion freshwater rotifers, we provided four strains two closely related rotifer species, Brachionus calyciflorus sensu stricto fernandoi, with algae differing their composition. The rotifers grazed for 5 days on either Nannochloropsis limnetica or Monoraphidium minutum, distinct...
Abstract Chemostat experiments are employed to study predator–prey and other trophic interactions, frequently using phytoplankton–zooplankton systems. These often use population dynamics as fingerprints of ecological evolutionary processes, assuming that the contributions all major actors these known. However, bacteria neglected although they present. We argue even without external carbon input may affect experimental outcomes depending on conditions physiological traits bacteria,...
Abstract In natural heterogeneous environments, the fitness of animals is strongly influenced by availability and composition food. Food quantity biochemical quality constraints may affect individual traits consumers differently, mediating response variation within among species. Using a multifactorial experimental approach, we assessed population growth rate, fecundity, survival six strains two closely related freshwater rotifer species Brachionus calyciflorus sensu stricto fernandoi ....
Abstract Chemostat experiments are employed to study predator-prey and other trophic interactions, frequently using phytoplankton-zooplankton systems. These often use population dynamics as fingerprints of ecological evolutionary processes, assuming that the contributions all major actors these known. However, bacteria neglected although they present. We argue even without external carbon sources may affect experimental outcomes depending on conditions physiological traits bacteria,...
Abstract Variability in the supply of limiting resources determines consumer-resource interactions. Yet, how consumers are affected by variability when multiple co-limit growth remains unknown. We use a two-resource DEB model to predict consumer somatic rate responds temporal structure (i.e. fluctuation frequency, phase and covariance) single co-limiting supply. Subsequently, we experimentally test predictions using Daphnia magna (co-)limited dietary phosphorus cholesterol Both experiments...