Examples of using Trophic levels in English and their translations into German
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The thus decreased toxicity, however, turns into its opposite in higher trophic levels.
Concerned that persistent organic pollutants can biomagnify in upper trophic levels to concentrations which might affect the health of exposed wildlife and humans.
Furthermore information is lacking on the effect of changes in size andspecies structure as well disturbance in trophic levels.
Â◄ The lowest of the available toxicity values between and within the different trophic levels(fish, crustacean, algae/aquatic plants) shall normally be used to define the appropriate hazard category ies.
Especially in marine ecosystems calanoid copepods play a fundamental role intransferring energy from primary production to higher trophic levels.
These species cover a range of trophic levels and taxa and are considered as surrogate for all aquatic organisms. Data on other species(e.g. Lemna spp.) shall also be considered if the test methodology is suitable.
Indoor defined microcosm testscomprising well-describe assemblages of organisms at different trophic levels to assess critical ecological threshold levels. .
Our study should provide the basis to better understand population genetic processes at the local scale andto elucidate the co-evolutionary interaction between species acting at two trophic levels.
We found out that oribatid mites in Sphagnum bogs span over three trophic levels and that the small-scale spatialheterogeneity of δ15 N in Sphagnum transfers to all trophic levels of oribatid mites Lehmitz& Maraun 2016.
In order to understand the link between biodiversity and ecosystem functioning,we thus need to take into account these multiple trophic levels.
A study entitled"Biodiversity at multiple trophic levels is needed for ecosystem multifunctionality," which was published recently in the journal Nature, is the first to take account of nine"trophic" groups in the food web of a grassland area from the ancient Greek trophe, for food or feeding.
The average size of the fish caught has decreased, and therehas also been a serious decrease in the numbers of large predatory fish species, which occupy the higher trophic levels 46.
Job Description● This position is devoted to understanding the relations of biogeochemical cycling,higher trophic levels(especially anchovy) and environmental conditions in the Humboldt upwelling system, with the specific goal to investigate biogeochemical and ecological tipping points, based on an"end-to-end" model approach.
In order to understand the link between biodiversity and ecosystem functioning in the context of globalchange we need to take into account these multiple trophic levels.
An assessment factor of 1Â 000 is typically applied to the lowest of three short term L(E)C50values derived from species representing different trophic levels and a factor of 10 to the lowest of three long-term NOEC values derived from species representing different trophic levels. .
Calanoid copepods play a key role in the marine food web, as they are a main food source for many commercially exploited fish. As they are also the most important phytoplankton grazers,they transfer energy from primary production to higher trophic levels.
In the longer term, the objective is to ensure a sustainable use of biodiversity through the protection and conservation of natural habitats and of wild fauna and flora in the first instance in the Europeanseas, inter alia, by restoring marine ecosystems and re-establishing certain trophic levels which have been affected by human activities and by preventing the human induced introduction of new non-indigenous species, genetically modified organisms and disease organisms.
Thus, a great study of the Federal Ministry for Environment, Nature Protection and Reactor Security is concerned with the subject of mercury exposure due to consumption of fish meat[12] and one encounters the following problem that the same mercury which is taken up by the organisms within the aquatic food chain during the covering of the requirements of essential tracesubstances is already deactivated on low trophic levels by biomethylation.
In a EU-funded project researchers set out to the volcanic island of Panarea to study the effect of CO2 that might leak out of sub-seabed storagesites in a natural setting for the first time on all trophic levels, from microbes to macrofauna.
Trophic level of micro- and mesozooplankton in response to environmental conditions.
Low water level reinforces the rise in trophic level.
Effects of repeated pesticide applications on trophic level and strategies of macrozoobenthos in stream mesocosms in cooperation with J. Zubrod, University Koblenz-Landau.
A trophy level(alternative terms: trophy stage, trophic level) refers to position or a level in a linear food chain in a given ecosystem.
The combination of these amino acid isotoperatios allows to decipher the contribution of the environment and the trophic level to the final isotope composition of the collagen.
The reconciliation of seal borne data with oceanographic features provides new insights into intermediate andupper trophic level interactions.
The δ 15 N value can therefore be used to determine the trophic level of organisms.
The purpose of prefiltration was to preventzooplankton from entering the sample and producing an additional trophic level to the test, which in turn would have affected the competitive relationships of the phytoplankton among themselves.
In the afternoon, the focus is on producers and consumers of a lake's plankton community. Species in plankton samples takenbefore class by XLAB staff are identified using high-quality microscopes and are used to characterize the lake's trophic level.
The interplay of ocean acidification and carbon availability, primaryproduction, N2 fixation and coupling with other trophic level(microbial loop) will be studied in this sub-project(1.2)The overarching question is,"What consequences does ocean acidification have on the productivity of single trophic level(primary producer, bacteria) and the turnover of organic matter produced?