Concept

Deep chlorophyll maximum

Publications associées (32)

Coral photosymbiosis: Linking phylogenetic identity to single cell metabolic activity in mixed symbiont populations

Anders Meibom, Isabelle Domart-Coulon, Maoz Fine, Béatrice Gaume

Tropical reef-building corals live in symbiosis with a wide range of micro-organisms, including unicellular Symbiodinium dinoflagellates also called zooxanthellae. These photosynthetic endosymbionts live inside the coral gastroderm cells. Although corals c ...

2017

Phenotypic heterogeneity driven by nutrient limitation promotes growth in fluctuating environments

Anders Meibom, Stéphane Laurent Escrig, Martin Ackermann

Most microorganisms live in environments where nutrients are limited and fluctuate over time. Cells respond to nutrient fluctuations by sensing and adapting their physiological state. Recent studies suggest phenotypic heterogeneity(1) in isogenic populatio ...

Nature Publishing Group2016

Impacts of hydrodynamics and benthic communities on phytoplankton distributions in a large, dreissenid-colonized lake (Lake Simcoe, Ontario, Canada)

Damien Bouffard

We quantified the vertical and horizontal variation of chlorophyll a (Chl-a) to test how benthic filter feeders (dreissenid mussels), rooted macrophytes, and hydrodynamics influence phytoplankton distributions in a large lake (Lake Simcoe, Canada). Water c ...

2013

Impact of farming practices on soil diatoms and testate amoebae: A pilot study in the DOK-trial at Therwil, Switzerland

Edward Mitchell, Thierry Jean Heger

Testate amoebae (Arcellinida and Euglyphida) and diatoms (Bacillariophyta) respond to different ecological gradients. These protists are useful tools for biomonitoring and paleoecological studies in aquatic and terrestrial ecosystems. However, little is kn ...

2012

Effect of primary organic sea spray emissions on cloud condensation nuclei concentrations

Athanasios Nenes

This work estimates the primary marine organic aerosol global emission source and its impact on cloud condensation nuclei (CCN) concentrations by implementing an organic sea spray source function into a series of global aerosol simulations. The source func ...

2012

Nutrient cycling in Lake Kivu

Alfred Johny Wüest, Martin Schmid

This chapter summarizes the knowledge on mixing and transport processes in Lake Kivu. Seasonal mixing, which varies in intensity from year to year, influences the top ∼65 m. Below, the lake is permanently stratified, with density increasing stepwise from ∼ ...

Springer2012

Stratification, mixing and transport processes in Lake Kivu

Alfred Johny Wüest, Martin Schmid

This chapter summarizes the knowledge on mixing and transport processes in Lake Kivu. Seasonal mixing, which varies in intensity from year to year, influences the top â¼65 m. Below, the lake is permanently stratified, with density increasing stepwise from ...

Springer2012

Occurrence of microcystin-producing cyanobacteria in Ugandan freshwater habitats

Cyril Portmann, Karl Gademann

Microcystins (MCs) are cyclic heptapeptides, which are the most abundant toxins produced by cyanobacteria in freshwater. The phytoplankton of many freshwater lakes in Eastern Africa is dominated by cyanobacteria. Less is known, however, on the occurrence o ...

2010

Influence of diatoms on copepod reproduction. I. Field and laboratory observations related to Calanus helgolandicus egg production

ABSTRACT: Egg production rates (EPR) by Calanus helgolandicus females were investigated with specimens sampled weekly, from April to November 2003 and from March to October 2004, at a station located in the English Channel off Roscoff. Comparison of result ...

2006

Effects of upstream hydropower operation on riverine particle transport and turbidity in downstream lakes

Alfred Johny Wüest, Martin Schmid

[ 1] Retention in upstream storage dams results in modified riverine water and particle discharge patterns. Particularly, suspended solids input and intrusion dynamics in downstream lakes are affected by dam operations. In a case study, size-dependent part ...

Amer Geophysical Union2006

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