A5024164429- Microbial Community Ecology and Physiology
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Evolution and Genetic Dynamics
- Hydrocarbon exploration and reservoir analysis
- Plant and animal studies
- Evolutionary Game Theory and Cooperation
- Circadian rhythm and melatonin
- Insect and Arachnid Ecology and Behavior
- Genomics and Phylogenetic Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Freshwater macroinvertebrate diversity and ecology
- Marine and fisheries research
- Methane Hydrates and Related Phenomena
- Anaerobic Digestion and Biogas Production
- Vibrio bacteria research studies
- Calcium Carbonate Crystallization and Inhibition
- Animal Behavior and Reproduction
- Physiological and biochemical adaptations
- Microbial Fuel Cells and Bioremediation
- Reservoir Engineering and Simulation Methods
- Neurobiology and Insect Physiology Research
- Ecosystem dynamics and resilience
- Ocean Acidification Effects and Responses
- Algal biology and biofuel production
University of Duisburg-Essen
2017-2024
University of Amsterdam
2012-2016
University of Groningen
2004-2015
Université de Montpellier
2012-2015
Institut de Recherche pour le Développement
2012-2015
Centre National de la Recherche Scientifique
2012-2015
Ifremer
2012-2015
Ecosystem Sciences
2009
University of Münster
2007
Resource competition theory predicts that the outcome of for two nutrients depends on ratio at which these are supplied. Yet there is considerable debate whether nutrient ratios or absolute loads determine species composition phytoplankton and plant communities. Here we extend classical resource model by including light as additional resource. Our results suggest nutrient-load hypothesis, in oligotrophic environments, whereas decisive eutrophic environments. The underlying mechanism...
The phase-resetting properties of the circadian system in mice with a functional deletion mCry1, mCry2, mPer1, or mPer2 were studied 2 experiments. In experiment 1, mCry1(-/-) and mCry2(-/-) as well mPer1(Brdm1) mPer2(Brdm1) mutant exposed to 15-min light pulses during 1st cycle following entrainment, either early (external time [ExT] 20) late (ExT 4) subjective night. 2, full PRC was measured for all these strains by exposure same duration intensity free-running conditions constant...
The decline of river and stream biodiversity results from multiple simultaneous stressors, yet few studies explore responses across various taxonomic groups at the same locations. In this study, we address shortcoming by using a coherent data set to study association nine commonly occurring stressors (five chemical, one morphological three hydraulic) with five (bacteria, fungi, diatoms, macro-invertebrates fish). According on single groups, hypothesise that gradients chemical structure...
We introduce an Interaction and Trade-off based Eco-Evolutionary Model (ITEEM), in which species are competing for common resources a well-mixed system, their evolution interaction trait space is subject to life-history trade-off between replication rate competitive ability. demonstrate that the strength of has fundamental impact on eco-evolutionary dynamics, as it imposes four phases diversity, including sharp phase transition. Despite its minimalism, ITEEM produces without further ad hoc...
Previous studies on sex allocation in simultaneous hermaphrodites have typically focused either evolutionary or one‐time, ontogenetic optimization of allocation, ignoring variation within an individual's lifetime. Here, we study whether also possess facultative that is, a phenotypic flexibility, allowing them to distribute resources opportunistic way during their adult We used the simultaneously hermaphroditic free‐living flatworm Macrostomum lignano and raised individuals pairs groups eight...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 468:43-56 (2012) - DOI: https://doi.org/10.3354/meps09954 Long-term mean annual microphytobenthos chlorophyll a variation correlates with air temperature Victor N. de Jonge1,*, Willem F. Boer2,5, Dick J. Jong3, Verena S. Brauer4 1Institute of Estuarine and Coastal Studies (IECS), University Hull, HU6 7RX UK...
N2-fixing cyanobacteria represent a major source of new nitrogen and carbon for marine microbial communities, but little is known about their ecological interactions with associated microbiota. In this study we investigated the between unicellular cyanobacterium Cyanothece sp. Miami BG043511 its free-living chemotrophic bacteria at different concentrations nitrate dissolved organic (DOC) temperatures. High temperature strongly stimulated growth Cyanothece, had less effect on community...
Despite hostile environmental conditions, microbial communities have been found in µL-sized water droplets enclosed heavy oil of the Pitch Lake, Trinidad. Some showed high sulfate concentrations and surprisingly low relative abundances sulfate-reducing bacteria a previous study. Hence, we investigated here whether reduction might be inhibited naturally. Ion chromatography revealed very formate around 2.37 mM 21 out 43 examined droplets. Since these were unexpectedly high, performed growth...
Most of the microbial degradation in oil reservoirs is believed to take place at oil-water transition zone (OWTZ). However, a recent study indicates that there life enclosed microliter-sized water droplets dispersed heavy Pitch Lake Trinidad and Tobago. This suggests also takes pockets oil-bearing rock an leg independent OWTZ. it unknown whether generic property rather than exotic exception. Hence, we took samples from three heavy-oil seeps, (Trinidad Tobago), La Brea Tar Pits (California,...
ABSTRACT Microbial degradation influences the quality of oil resources. The environmental factors that shape composition microbial communities are largely unknown because most samples from fields impacted by anthropogenic production, perturbing native ecosystem with exogenous fluids and microorganisms. We investigated relationship between formation water geochemistry community in undisturbed samples. isolated 43 microliter-sized droplets naturally enclosed heavy Pitch Lake, Trinidad Tobago....
The metabolic theory of ecology (MTE) is an intriguing but controversial that tries to explain ecological patterns at all scales on the basis first principles. Temperature plays a pivotal role in this theory. According MTE, Arrhenius relationship describes effect temperature biochemical reactions extends ‘universal dependence’ encompasses kinds processes and up cellular, organismal, community level. In study we test prediction growth rate dependent Arrhenius‐like way. First, performed...
Abstract It is widely assumed that a taxonomic core community emerges among microbial communities from similar habitats because environments select for the same taxa bearing traits. Yet, itself no indicator of selection it may also arise dispersal and neutral drift, i.e. by chance. Here, we hypothesize produced either or chance processes should be distinguishable. While drift produce with relative taxon abundances, especially when proportional community, sum abundances taxa, large, variable...
Abstract Microorganisms play a key role in the functioning of healthy river ecosystems because they consume carbon and nutrients from dead biomass derived algae other higher organisms, or “necromass”, to feed it back into food web. This so-called microbial loop is known be substantial aquatic systems, but so far unknown which extent microorganisms perform self-recycling, i.e. recycling necromass microorganisms, how this process affected by multiple stressors such as increased temperature...
Abstract Microorganisms in river sediments are the primarily responsible organisms for turnover of dissolved organic carbon (DOC) these systems and therefore key players ecosystem functioning. Rivers increasingly threatened by multiple stressors such as salinization temperature rise, but little is known about how microbial DOC-degradation responds to whether this function recovers after stressor release. Here, we investigated direct indirect effects salinity increase decrease on communities...
Abstract Rivers globally are impacted by numerous anthropogenic stressors, including water pollution, habitat degradation, and climate change, which collectively stress biodiversity ecosystem functioning. This study systematically reviews analyses published unpublished data to understand how five aquatic organism groups (bacteria, algae, macrophytes, invertebrates, fish) respond seven common stressors (salinization, oxygen depletion, fine sediment enrichment, temperature increase, flow...
Abstract We introduce an Interaction and Trade-off based Eco-Evolutionary Model (ITEEM), in which species are competing for resources a well-mixed system, their evolution interaction trait space is subject to life-history trade-off between replication rate competitive ability. demonstrate that the strength of has fundamental impact on eco-evolutionary dynamics, as it imposes four phases diversity, including sharp phase transition. Despite its minimalism, ITEEM produces without further ad hoc...