A5091142879- Microbial Community Ecology and Physiology
- Marine and coastal ecosystems
- Methane Hydrates and Related Phenomena
- Protist diversity and phylogeny
- Environmental DNA in Biodiversity Studies
- Arctic and Antarctic ice dynamics
- Isotope Analysis in Ecology
- Diatoms and Algae Research
- Marine Biology and Ecology Research
- Identification and Quantification in Food
- Atmospheric and Environmental Gas Dynamics
- Food Industry and Aquatic Biology
- Marine Toxins and Detection Methods
- Polar Research and Ecology
- Genomics and Phylogenetic Studies
- Ocean Acidification Effects and Responses
- Gene expression and cancer classification
- Marine Bivalve and Aquaculture Studies
- Water Quality Monitoring and Analysis
- Advanced biosensing and bioanalysis techniques
- Marine and environmental studies
- Bacteriophages and microbial interactions
- Arctic and Russian Policy Studies
- Geological Studies and Exploration
- Plant Virus Research Studies
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2016-2025
Helmholtz Institute for Functional Marine Biodiversity
2017-2024
Carl von Ossietzky Universität Oldenburg
2018-2024
University of Plymouth
2024
GEOMAR Helmholtz Centre for Ocean Research Kiel
2019
Constructor University
2014-2017
L3S Research Center
2009-2010
Between Greenland and Spitsbergen, Fram Strait is a region where cold ice-covered Polar Water exits the Arctic Ocean with East Current (EGC) warm Atlantic enters West Spitsbergen (WSC). In this compilation, we present two different data sets from plankton ecological observations in Strait: (1) long-term measurements of satellite-derived (1998–2012) situ chlorophyll (chl a) (mainly summer cruises, 1991–2012) plus protist compositions (a station WSC, eight 1998–2011); (2) short-term...
Time-series studies of arctic marine ecosystems are rare. This is not surprising since polar regions largely only accessible by means expensive modern infrastructure and instrumentation. In 1999, the Alfred Wegener Institute, Helmholtz-Centre for Polar Marine Research (AWI) established LTER (Long-Term Ecological Research) observatory HAUSGARTEN crossing Fram Strait at about 79° N. Multidisciplinary investigations covering all parts open-ocean ecosystem carried out a total 21 permanent...
The ocean moderates the world's climate through absorption of heat and carbon, but how much carbon will continue to absorb remains unknown. North Atlantic Ocean west (Baffin Bay/Labrador Sea) east (Fram Strait/Greenland Greenland features most intense anthropogenic globally; biological pump (BCP) contributes substantially. As Arctic sea-ice melts, BCP changes, impacting global other critical attributes (e.g. biodiversity). Full understanding requires year-round observations across a range...
Abstract. Dimethyl sulfide (DMS) plays an important role in the atmosphere by influencing formation of aerosols and cloud condensation nuclei. In contrast, methanethiol (MeSH) for budget flux reduced sulfur remains poorly understood. present study, we quantified DMS MeSH together with trace gases carbon monoxide (CO), isoprene, acetone, acetaldehyde acetonitrile North Atlantic Arctic Ocean surface waters, covering a transect from 57.2 to 80.9∘ N high spatial resolution May–June 2015. Whereas...
Information on recent photosynthetic biomass distribution and biogeography of Arctic marine pico-eukaryotes (0.2–3 μm) is needed to better understand consequences environmental change for ecosystems. We analysed pico-eukaryote community composition in Fram Strait large parts the Central Ocean (Nansen Basin, Amundsen Basin) using chlorophyll a (Chl a) measurements, automated ribosomal intergenic spacer analysis (ARISA) 454-pyrosequencing. Samples were collected during summer 2012, year with...
Abstract. The Coastal Observing System for Northern and Arctic Seas (COSYNA) was established in order to better understand the complex interdisciplinary processes of northern seas coasts a changing environment. Particular focus is given German Bight North Sea as prime example heavily used coastal area, Svalbard an coast that under strong pressure due global change.The COSYNA automated observing modelling system designed monitor real-time conditions provide short-term forecasts, data, data...
Climate models project that the Arctic Ocean may experience ice-free summers already in second half of this century. This have severe repercussions on phytoplankton bloom dynamics and associated cycling carbon surface waters. We currently lack baseline knowledge seasonal microbial communities, which is needed order to better estimate effects such changes ecosystem functioning. Here we present a comparative study polar summer communities (eastern) ice-covered (western) hydrographic regimes at...
In the next decade pressures on ocean systems and communities that rely them will increase as multiple stressors of climate change, food security human activities start to impact. Our ability manage sustain our oceans depend data we collect information knowledge generated. Much uptake this be outside domain, for example by policy makers, local Governments, custodians other organizations, so it is imperative democratize or open access use data. This paper looks at how technologies, scoped...
The Arctic Ocean features extreme seasonal differences in daylight, temperature, ice cover, and mixed layer depth. However, the diversity ecology of microbes across these contrasting environmental conditions remain enigmatic. Here, using autonomous samplers sensors deployed at two mooring sites, we portray an annual cycle microbial diversity, nutrient concentrations physical oceanography major hydrographic regimes Fram Strait. ice-free West Spitsbergen Current displayed a marked separation...
Abstract Deciphering how microbial communities are shaped by environmental variability is fundamental for understanding the structure and function of ocean ecosystems. While seasonal gradients have been shown to taxonomic dynamics microbiomes over time, little known about their impact on functional coupling between taxonomy function. Here, we demonstrate annually recurrent, structuring in a pelagic Arctic Ocean microbiome combining autonomous samplers situ sensors with long-read metagenomics...
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...
Abstract Transparent exopolymer particles (TEP) are a class of marine gel and important links between surface ocean biology atmospheric processes. Derived from microorganisms, these can facilitate the biological pumping carbon dioxide to deep sea, or act as cloud condensation ice nucleation in atmosphere. Yet, environmental controls on TEP abundance poorly known. Here, we investigated some during first multiyear time-series for Fram Strait, Atlantic gateway Central Arctic Ocean. Data...
Investigation of marine eukaryotic picoplankton composition is limited by missing morphological features for appropriate identification. Consequently, molecular methods are required. In this study, we used 454-pyrosequencing to study communities at four stations in the West Spitsbergen Current (WSC; Fram Strait). High abundances Micromonas pusilla were detected station situated closest Spitsbergen, as seen surveys assemblages Beaufort Sea. At other three stations, phylotypes, affiliating...
Protists (microbial eukaryotes) are diverse, major components of marine ecosystems, and fundamental to ecosystem services. In the last 10 years, molecular studies have highlighted substantial novel diversity in systems including sequences with no taxonomic context. At same time, many known protists remain without a DNA identity. Since majority pelagic too small identify by light microscopy, most neither comprehensively or regularly taken into account, particularly Long-term Ecological...
Abstract Global warming is rapidly altering physicochemical attributes of Arctic waters. These changes are predicted to alter microbial networks, potentially perturbing wider community functions including parasite infections and saprotrophic recycling biogeochemical compounds. Specifically, the interaction between autotrophic phytoplankton heterotrophic fungi e.g. chytrids (fungi with swimming tails) requires further analysis. Here, we investigate diversity distribution patterns in relation...
Over the past decades, two key grazers in Southern Ocean (SO), krill and salps, have experienced drastic changes their distribution abundance, leading to increasing overlap of habitats. Both species occupy different ecological niches long-term shifts distributions are expected cascading effects on SO ecosystem. However, studies directly comparing salps lacking. Here, we provide a direct comparison diet fecal pellet composition using 18S metabarcoding fatty acid markers. Neither species'...
The Arctic Ocean is experiencing unprecedented changes because of climate warming, necessitating detailed analyses on the ecology and dynamics biological communities to understand current future ecosystem shifts. Here, we generated a four-year, high-resolution amplicon dataset along with one annual cycle PacBio HiFi read metagenomes from East Greenland Current (EGC), combined this datasets spanning different spatiotemporal scales (Tara MOSAiC) assess impact Atlantic water influx sea-ice...
The Arctic Ocean is one of the regions where anthropogenic environmental change progressing most rapidly and drastically. impact rising temperatures decreasing sea ice on marine microbial communities yet not well understood. Microbes form basis food webs in Ocean, providing energy for larger organisms. Previous studies have shown that Atlantic taxa associated with low light are robust to more polar conditions. We compared which extent melt influences light-associated phytoplankton dynamics...
In this study, we present the first comprehensive analyses of diversity and distribution marine protist (micro‐, nano‐, picoeukaryotes) in Western Fram Strait, using 454‐pyrosequencing high‐pressure liquid chromatography ( HPLC ) at five stations summer 2010. Three (T1; T5; T7) were influenced by Polar Water, characterized cold water with lower salinity (<33) different extents ice concentrations. Atlantic Water other two (T6; T9). While T6 was located mixed zone intermediate (~33) high...