A5002732247- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Microbial Community Ecology and Physiology
- Ocean Acidification Effects and Responses
- Diatoms and Algae Research
- Species Distribution and Climate Change
- Isotope Analysis in Ecology
- Protist diversity and phylogeny
- Marine Toxins and Detection Methods
- Polar Research and Ecology
- Effects and risks of endocrine disrupting chemicals
- Geology and Paleoclimatology Research
- Marine Bivalve and Aquaculture Studies
- Market Dynamics and Volatility
- Arctic and Antarctic ice dynamics
- Evolutionary Game Theory and Cooperation
- Genomics and Phylogenetic Studies
- Marine and coastal plant biology
- Microplastics and Plastic Pollution
- Methane Hydrates and Related Phenomena
- Cephalopods and Marine Biology
- Ecosystem dynamics and resilience
- Genetic diversity and population structure
- Paleontology and Stratigraphy of Fossils
- Environmental DNA in Biodiversity Studies
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2017-2025
Stockholm University
2024
GEOMAR Helmholtz Centre for Ocean Research Kiel
2011-2013
Leibniz Association
2011
High concentrations of microplastics have been found in sea ice but the mechanisms by which they get captured into and role algae might play this process remain unknown. Similarly, we do not know how presence impact colonization algae. To estimate ecological for Polar ecosystems, it is essential to understand their behaviour during formation possible interactions with organisms inhabiting ice. In study tested interaction between Fragillariopsis cylindrus microplastic beads without present...
Abstract Ecosystem functioning is simultaneously affected by changes in community composition and environmental change such as increasing atmospheric carbon dioxide ( CO 2 ) subsequent ocean acidification. However, it largely remains uncertain how the effects of these factors compare to each other. Addressing this question, we experimentally tested hypothesis that initial elevated are equally important regulation phytoplankton biomass. We full‐factorially exposed three compositionally...
Abstract The Multidisciplinary Observatory for Study of the Arctic Climate (MOSAiC) expedition consisted a year-long drifting survey Central Ocean. ecosystems component MOSAiC included sampling molecular data, with metagenomes collected from diverse range environments. generation metagenome-assembled-genomes (MAGs) are starting point genome-resolved analyses. This dataset presents catalogue MAGs recovered set 73 samples MOSAiC, including 2407 prokaryotic and 56 eukaryotic MAGs, as well...
We introduce the Global rRNA Universal Metabarcoding Plankton database (GRUMP), which consists of 1194 samples that were collected from 2003-2020 and cover extensive latitudinal longitudinal transects, as well depth profiles in all major ocean basins. DNA unfractionated (> 0.2um) seawater was amplified using 515Y/926R universal three-domain gene primers, simultaneously quantifying relative abundance amplicon sequencing variants (ASVs) bacteria, archaea, eukaryotic nuclear 18S, plastid...
Ice-binding proteins (IBPs) are a group of ecologically and biotechnologically relevant enzymes produced by psychrophilic organisms. Although putative IBPs containing the domain unknown function (DUF) 3494 have been identified in many taxa polar microbes, our knowledge their genetic structural diversity natural microbial communities is limited. Here, we used samples from sea ice water collected central Arctic Ocean as part MOSAiC expedition for metagenome sequencing subsequent analyses...
In experimental metacommunities with marine benthic microalgae, we tested whether heat stress changes effects of connectivity and habitat heterogeneity on metacommunity structure functioning, by manipulating a simulated wave, dispersal frequency light intensity gradient. We found that all measures mean local regional diversity community biomass significantly declined after the wave showed no sign recovery. Additionally, decreased increased dominance in both stressed control communities....
Abstract. The ongoing rise in atmospheric pCO2 and consequent increase ocean acidification have direct effects on marine calcifying phytoplankton, which potentially alters carbon export. To date it remains unclear, firstly, how nutrient regime, particular by coccolithophores preferred phosphate limitation, interacts with particulate accumulation; secondly, physiological responses the cellular level translate into total population response. In this study, cultures of Emiliania huxleyi were...
The Southern Ocean is characterized by longitudinal water circulations crossed strong latitudinal gradients. How this oceanographic background shapes planktonic populations largely unknown, despite the significance of region for global biogeochemical cycles. Here, we show, based on genomic, morphometric, ecophysiological and mating compatibility data, an example ecotypic differentiation speciation within endemic pelagic inhabitant, diatom Fragilariopsis kerguelensis. We discovered three...
The Southern Ocean is one of the most productive ecosystems in world. It an area heavily dependent on marine primary production and serving as a feeding ground for numerous seabirds mammals. Therefore, phytoplankton composition presence toxic species are crucial importance. Fifteen monoclonal strains Pseudo-nitzschia subcurvata, diatom endemic to Ocean, were established, which characterized by morphological molecular data then analysed toxin content. neurotoxins domoic acid iso-domoic C...
The international and interdisciplinary sea-ice drift expedition “The Multidisciplinary drifting Observatory for the Study of Arctic Climate” (MOSAiC) was conducted from October 2019 to September 2020. aim MOSAiC study interconnected physical, chemical, biological characteristics processes atmosphere deep sea central system. ecosystem team addressed current knowledge gaps explored unknown properties over a complete seasonal cycle focusing on three major research areas: biodiversity,...
Multiomics approaches need to be applied in the central Arctic Ocean benchmark biodiversity change and identify novel species their genes. As part of MOSAiC, EcoOmics will therefore essential for conservation sustainable bioprospecting one least explored ecosystems on Earth.
Fragilariopsiskerguelensis (O' Meara) Hust. is a ubiquitous diatom of the Southern Ocean. Its thick frustules are numerically dominant component siliceous sediment layer covering large parts seafloor beneath. Morphometric variability this has been interest for paleoenvironmental reconstructions. Recently, two morphotypes differentiated by morphometric descriptor rectangularity were described from Ocean core, relative abundance which correlated with reconstructed paleotemperatures. In present...
Ecological research in recent decades revealed that species loss has a predominantly negative effect on ecosystem functioning and stability. Most of these studies were based random scenarios, but extinctions nature are not random. Recent experimental using macroscopic communities largely advanced knowledge about the effects non-random loss. However, microscopic like phytoplankton, implementing realistic scenarios is challenging data scarce. Creating more experiments to study role...
Abstract. The ongoing rise in atmospheric pCO2 and the consequent increase ocean acidification have direct effects on marine calcifying phytoplankton which potentially translates into altered carbon export. To date it remains unclear first, how nutrient ratio, particular from coccolithophores preferred phosphate limitation, interacts with particulate accumulation. Second, physiological responses cellular level translate a net population response. In this study cultures of Emiliania huxleyi...