A5001440834- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Fish Ecology and Management Studies
- Marine Biology and Ecology Research
- Isotope Analysis in Ecology
- Protist diversity and phylogeny
- Aquatic Invertebrate Ecology and Behavior
- Ecology and Vegetation Dynamics Studies
- Soil and Water Nutrient Dynamics
- Environmental DNA in Biodiversity Studies
- Coastal wetland ecosystem dynamics
- Species Distribution and Climate Change
- Plant and animal studies
- Freshwater macroinvertebrate diversity and ecology
- Marine and coastal plant biology
- Aquatic Ecosystems and Biodiversity
- Water Quality and Pollution Assessment
- Wildlife-Road Interactions and Conservation
- Evolution and Genetic Dynamics
- Marine and fisheries research
- Algal biology and biofuel production
- Marine Bivalve and Aquaculture Studies
- Genetic diversity and population structure
- Physiological and biochemical adaptations
Wasser Cluster Lunz
2016-2025
University of South-Eastern Norway
2024-2025
University of Vienna
2011-2023
Carl von Ossietzky Universität Oldenburg
2009-2016
Eötvös Loránd University
2013
University of Konstanz
2013
Norwegian Institute for Water Research
2006-2010
Jade University of Applied Sciences
2009
GEOMAR Helmholtz Centre for Ocean Research Kiel
2005
Ludwig-Maximilians-Universität München
2002-2003
The noninteractive zero-knowledge proof (NIZKP) is underlying a broad spectrum of applications. major categories NIZKP are instantiated with deterministic hash functions in the real world. However, outputs ...Zero-knowledge (ZKP) fundamental cryptographic primitive that allows prover to convince verifier validity statement without leaking any further information. As an efficient variant ZKP, (...
Abstract The metacommunity concept has the potential to integrate local and regional dynamics within a general community ecology framework. To this end, must move beyond discrete archetypes that have largely defined it (e.g. neutral vs. species sorting) better incorporate scale interactions coexistence mechanisms. Here, we present fundamental reconception of framework explicitly links theory spatial processes inherent theory, allowing for continuous range competitive dynamics. These emerge...
Rapid and drastic anthropogenic impacts are affecting global biogeochemical processes driving biodiversity loss across Earth's ecosystems. In aquatic ecosystems, species distributions shifting, abundances of many have declined dramatically, threatened with extinction. addition to diversity, the ecosystem functions, services on which humans depend also being heavily impacted. Addressing these challenges not only requires direct action mitigate environmental but innovative approaches identify,...
One of the oldest and richest questions in biology is that how species diversity related to availability resources limit productivity ecosystems. Researchers from a variety disciplines have pursued this question at least three different theoretical perspectives. Species energy theory has argued summed quantities all influence richness by controlling population sizes probability stochastic extinction. Resource ratio imbalance supply two or more resources, relative stoichiometric needs...
We studied the effects of water column mixing depth and background turbidity on phytoplankton biomass, light climate, nutrients in two field enclosure experiments designed to test predictions a dynamical model. In 1997 1998, we created gradients by enclosing 100-μm-filtered community phosphorus-deficient lake cylindrical plastic bags varying (1.5–15 m) which were continuously mixed. To mimic different levels turbidity, surrounded transparent walls with layer opaque white (1997) or black...
We aim to define the best nutrient limitation indicator predicting phytoplankton biomass increase as a result of enrichment (N, P, or both). compare abilities different indicators, based on chemical measurements nitrogen (N) and phosphorus (P) fractions in initial plankton community, predict limiting factor for growth inferred independently from short-term laboratory experiments same natural communities data set NE Baltic Sea (Tamminen Andersen, Mar Ecol Prog Ser 340:121–138, 2007). The...
In their seminal paper, Goldman et al. suggested that phytoplankton close to maximum growth rate attains a restricted optimal N : P ratio the Redfield of molar = 16. Recently, presence such global attractor for stoichiometry has been questioned in models and empirical analyses. As chemical composition is major importance our understanding elemental cycles biogeochemical transformations, we assembled 55 data sets biomass ratios meta‐analysis testing (1) whether converges at high rates, (2)...
Earth's climate is changing, and by the end of 21st century in Europe, average temperatures are likely to have risen at least 2 °C, more 4 °C with associated effects on patterns precipitation frequency extreme weather events. Attention among policy-makers divided about how minimise change, mitigate its effects, maintain natural resources which societies depend adapt human changes. Natural systems still seen, through a long tradition conservation management that largely species-based, as...
The objective of this synthesis is to present the key messages and draw main conclusions from work on lakes in REBECCA project, pointing out their links theoretical ecology applicability for WFD implementation. Type-specific results were obtained analyses large pan-European datasets phytoplankton, macrophytes, macroinvertebrates fish, indicators relationships showing impact eutrophication or acidification these biological elements constructed. thresholds identified many response curves are...
In the course of biodiversity-ecosystem functioning debate, issue multifunctionality species communities has recently become a major focus. Elemental stoichiometry is related to variety processes reflecting multiple plant responses biotic and abiotic environment. It can thus be expected that diversity assemblage alters community level tissue chemistry. We explored elemental in aboveground (ratios carbon, nitrogen, phosphorus, potassium) its relationship 5-year study large grassland...
Abstract Recent studies clearly support a positive biodiversity–ecosystem functioning ( BEF ) relationship in phytoplankton. As taxon richness does not quantify functional diversity, approaches have been developed to link community diversity. Compared terrestrial plant communities, only few validated phytoplankton relationships. Furthermore, the ability of and taxonomic measures predicting ecosystem natural communities has compared yet. Here, we analysed using (trait categories response...
Species diversity is affected by processes operating at multiple spatial scales, although the most relevant scales that contribute to compositional variation and temporal shifts of involved mechanisms remain poorly explored. We studied patterns phytoplankton, rotifers microcrustacean across in a river floodplain system Danube Austria under contrasting hydrological conditions (post-flood versus low water level).The species turnover between sections (β2) wetlands (β3) was major components...
According to a recent dynamical model, the depth of well‐mixed water column should have contrasting effects on abundances sinking and nonsinking phytoplankton taxa. Because increasing light limitation, taxa decline monotonically with mixing depth, because loss limitation at low depths, peak intermediate depths. Along gradient position this maximum increase taxon‐specific velocity decrease background turbidity. In two field‐enclosure experiments, we investigated turbidity variety We exposed...
Nonribosomal oligopeptides were used as qualitative and quantitative markers to test whether populations of the toxic freshwater cyanobacterium Planktothrix comprise subpopulations with dissimilar ecological traits. A field program was conducted in Lake Steinsfjorden (Norway), where has dominated phytoplankton community for decades, allowing present study disregard other potential producers nonribosomal oligopeptides. Four chemotypes distinct cellular oligopeptide patterns found lake. The...
Recent research has highlighted that positive biodiversity–ecosystem functioning relationships hold for all groups of organisms, including microbes. Yet, we still lack understanding regarding the drivers microbial diversity, in particular, whether diversity communities is a matter local factors, or metacommunities are similar importance to what known from higher organisms. Here, explore driving forces behind spatial variability lake phytoplankton Fennoscandia. While biovolume best predicted...
Salinity represents a major structuring factor in aquatic habitats which strongly affects species richness. We studied the relationships among richness, density and phylogenetic diversity of zooplankton communities along natural salinity gradient astatic soda pans Carpathian Basin (Hungary, Austria Serbia). Diversity showed opposing trends gradient. The most saline had one or two only, with maximum densities well above 1000 ind l −1 . Similarity increased salinity, highly being dominated by...
Abstract Mixotrophs combine photosynthesis with phagotrophy to cover their demands in energy and essential nutrients. This gives them a competitive advantage under oligotropihc conditions, where nutrients bacteria concentrations are low. As the for mixotroph depends on light, competition between mixo- heterotrophic bacterivores should be regulated by light. To test this hypothesis, we incubated natural plankton from ultra-oligotrophic Eastern Mediterranean set of mesocosms maintained at 4...
Abstract We used natural phytoplankton communities from four coastal regions to test diversity‐functioning relationships, relations of N 2 ‐fixing cyanobacteria nutrient imbalance, and the importance metacommunity dynamics. Resource availability was measured as total nitrogen phosphorus. imbalance determined (1) ratio dissolved inorganic phosphorus (2) an experimentally verified indicator quantified by modelling responses in 14 C‐based primary production additions. explained variance...