H.-P. Grossart

Effects of excess phosphate on a coastal plankton community: a mesocosm experiment in the Baltic Sea

This study investigates the effects of excess phosphate in a mesocosm experiment, showing that nitrogen addition reduces phosphate concentrations more effectively than carbon addition.

Microbial remineralization processes during post-spring-bloom excess phosphate in the northern Baltic Sea

The paper examines microbial processes in the Baltic Sea during post-spring-bloom phosphate excess, showing that alkaline phosphatase activity and shifts in bacterial communities affect nutrient cycling and organic matter export.

Virus-encoded Shemin pathway highlights the importance of tetrapyrrole metabolism during host infection

This study identifies viral Shemin pathway genes in bacteriophages that can functionally complement bacterial 5-ALA biosynthesis pathways.

Phenology and ecological role of Aerobic Anoxygenic Phototrophs in fresh waters

This study investigates the seasonal dynamics of aerobic anoxygenic phototrophic bacteria in a freshwater lake, revealing their role in organic matter recycling and ecological dynamics.

Rethinking sinking: Imaging flow fields of natural marine aggregates to infer porosity-dependent changes in sinking velocity and carbon flux

The paper measures sinking velocities of marine aggregates using PIV and shows small aggregates contribute 40-70% to carbon flux due to higher size-specific settling velocities.

Phytoplankton tune local pH to actively modulate circadian swimming behavior

This study shows that phytoplankton actively regulate local pH to create distinct gravitactic sub-populations, leading to irregular diel vertical migration patterns.

Phylogenomics including new sequence data of phytoplankton-infecting chytrids reveals multiple independent lifestyle transitions across the phylum

This study uses phylogenomic data from new and existing sequences to show multiple independent transitions between parasitism and saprotrophy in chytrids, with the last common ancestor being a phytoplankton parasite.

Synergistic effects of predation and parasitism on competition between edible and inedible phytoplankton

The paper investigates how fungal parasites and zooplankton grazing interact to influence competition between edible and inedible phytoplankton, finding synergistic effects under different nutrient conditions.

Perchlorate-Specific Proteomic Stress Responses of Debaryomyces hansenii Could Enable Microbial Survival in Martian Brines

This study identifies perchlorate-specific proteomic stress responses in Debaryomyces hansenii, revealing mechanisms that may enable microbial survival in Martian brines.

From microbes to mammals: pond biodiversity homogenization across different land-use types in an agricultural landscape

The paper assesses biodiversity homogenization in kettle holes across different land-use types using eDNA sequencing and finds that agricultural intensification and nutrient enrichment lead to reduced biodiversity differences.

Significant organic carbon acquisition by Prochlorococcus in the oceans

The paper quantifies Prochlorococcus carbon acquisition, showing mixotrophy supports its ecological success in oceanic environments.

Phytoplankton exudates provide full nutrition to a subset of accompanying heterotrophic bacteria via carbon, nitrogen and phosphorus allocation

The paper shows that phytoplankton exudates supply both carbon and nutrients (N, P) to specific bacteria in coastal and open-ocean ecosystems of the Eastern Mediterranean.

Microbial drama in four acts - Extreme rain events cause cyclic succession in plankton communities

The paper shows that extreme rain events cause cyclic succession in microbial and plankton communities of a forest pond, with recovery occurring through four distinct phases.

Heterozygous, polyploid, giant bacterium, Achromatium, possesses an identical functional inventory worldwide across drastically different ecosystems

The paper shows Achromatium, a polyploid bacterium, has a globally identical functional inventory across diverse ecosystems, adapting through gene expression rather than genetic change.

Comparative whole-genome approach to identify bacterial traits for microbial interactions

The paper identifies bacterial traits for microbial interactions using a whole-genome approach across 473 marine bacterial genomes, revealing functional clusters and interaction patterns.

Urbanization promotes specific bacteria in freshwater microbiomes including potential pathogens

The paper identifies urban-specific bacteria in freshwater ecosystems, including potential pathogens, showing urbanization alters microbial communities and creates health risks.

Prochlorococcus rely on microbial interactions rather than on chlorotic resting stages to survive long-term nutrient starvation

This study shows Prochlorococcus survive nutrient starvation through interactions with heterotrophic bacteria, not by forming chlorotic resting stages.

Taxonomical and functional diversity of Saprolegniales in Anzali lagoon, Iran

This study identifies four Saprolegniales species in Anzali lagoon, Iran, and evaluates their enzymatic activities, highlighting their ecological roles in freshwater ecosystems.

The role of land use types and water chemical properties in structuring the microbiomes of a connected lakes system

The paper examines how land use and water chemistry influence microbiomes in a connected lakes system, finding that land use within drainage basins affects water quality and microbial structure, while direct land use around lakes has minimal impact.

Widespread methane formation by Cyanobacteria in aquatic and terrestrial ecosystems

This study shows Cyanobacteria produce methane in both oxygenated and anoxic conditions, challenging the view that methanogenesis is exclusive to Archaea and linking it to climate change and Earth's methane history.

Highly diverse fungal communities in carbon-rich aquifers of two contrasting lakes in Northeast Germany

This study examines fungal communities in groundwater near two lakes in NE Germany, finding high diversity and functional roles in degrading organic matter.

Effects of zooplankton carcasses degradation on freshwater bacterial community composition and implications for carbon cycling

This study shows that zooplankton carcasses rapidly decompose in freshwater, altering bacterial communities but not affecting humic matter degradation.

Proper experimental design requires randomization/balancing of molecular ecology experiments

The paper highlights the importance of randomization and balancing in molecular ecology experiments to avoid biased results from unaccounted laboratory procedures.

Model communities hint to promiscuous metabolic linkages between ubiquitous free-living freshwater bacteria

The paper investigates metabolic interactions among free-living freshwater bacteria and finds they form loose, unspecific cooperative networks rather than specific dependencies.

Metabarcoding of unfractionated water samples relates phyto-, zoo- and bacterioplankton dynamics and reveals a single-taxon bacterial bloom

The paper uses DNA-metabarcoding on unfractionated water samples to study plankton dynamics, revealing a bacterial bloom that traditional methods missed.