Concept

Pyramide écologique

Publications associées (40)

Mixtures of Chemical Pollutants at European Legislation Safety Concentrations: How Safe Are They?

The risk posed by complex chemical mixtures in the environment to wildlife and humans is increasingly debated, but has been rarely tested under environmentally relevant scenarios. To address this issue, two mixtures of 14 or 19 substances of concern (pesti ...

Oxford University Press2014

Plant functional diversity drives niche-size-structure of dominant microbial consumers along a poor to extremely rich fen gradient

Vincent Eric Jules Jassey, Mariusz Lamentowicz, Bjorn Jozef Maria Robroek

Plant community composition is recognized more and more for playing an important role in ecosystem processes, such as C cycling. In particular, plant functional type (PFT) composition seems to have a key regulatory role, yet the underlying mechanisms in ...

Wiley-Blackwell2014

Integrated toxicity evaluation of a pulp deposit using organisms of different trophic levels

In order to assess possible adverse effects originating from pulp deposits in a Swiss lake, a sediment quality triad approach was applied with chemical, ecotoxicological and ecological assessment methods. To obtain an integrative picture of the potential e ...

Springer Heidelberg2013

To What Extent Do Food Preferences Explain the Trophic Position of Heterotrophic and Mixotrophic Microbial Consumers in a Sphagnum Peatland?

Edward Mitchell, Vincent Eric Jules Jassey, Caroline Meyer

Although microorganisms are the primary drivers of biogeochemical cycles, the structure and functioning of microbial food webs are poorly studied. This is the case in Sphagnum peatlands, where microbial communities play a key role in the global carbon cycl ...

Springer US2013

Ammonia exposure promotes algal biomass in an ombrotrophic peatland

Vincent Eric Jules Jassey

Nitrogen pollution affects many peatlands with consequences for their biodiversity and ecosystem function. Microorganisms control nutrient cycling and constitute most of the biodiversity of peatlands but their response to nitrogen is poorly characterised a ...

Pergamon-Elsevier Science Ltd2013

Pelletization of micro-algae by induced lichen formation through co-culture with filamentous fungi

Christof Holliger, Pierre Rossi, Jean-Paul Schwitzguebel, Eduardo Pereira Gomes, Stephen Mackay

The use of micro-algae within industrial applications, such as biofuel production, has several limitations with regard to cost and therefore sustainability. Micro-algae biomass consists of small single cells that stay in suspension making them difficult to ...

2013

Quantifying Biomass Of Secondary Forest After Slash-And-Burn Cultivation In Central Menabe, Madagascar

Alexandre Buttler, Rodolphe Schlaepfer, Jean-Michel Gobat

RAHARIMALALA O, BUTTLER A, SCHLAEPFER R & GOBAT J-M. 2012. Quantifying biomass of secondary forest after slash-and-burn cultivation in Central Menabe, Madagascar. Biomass is the principal input of nutrients in slash-and-burn cultivation of tropical dry dec ...

Forest Research Inst Malaysia2012

An exactly solvable coarse-grained model for species diversity

Andrea Rinaldo, Samir Suweis, Amos Maritan

We present novel analytical results concerning ecosystem species diversity that stem from a proposed coarse-grained neutral model based on birth-death processes. The relevance of the problem lies in the urgency for understanding and synthesizing both theor ...

Iop Publishing Ltd2012

Flooding of the continental shelves as a contributor to deglacial CH4 rise

Jed Oliver Kaplan

The transition from the last glacial and beginning of BollingAllerod and Pre-Boreal periods in particular is marked by rapid increases in atmospheric methane (CH4) concentrations. The CH4 concentrations reached during these intervals, similar to 650750 ppb ...

Wiley-Blackwell2012

Culture conditions affect fatty acid content along with wound-activated production of polyunsaturated aldehydes in Thalassiosira rotula (Coscinodiscophyceae)

The nutritional value of diatoms for grazers has been frequently addressed in experiments. However, little is known about the effects of culture conditions on the quality of algae as food for higher trophic levels. We examined the fatty acid composition of ...

2010

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