A5081492757- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Marine and fisheries research
- Isotope Analysis in Ecology
- Marine Bivalve and Aquaculture Studies
- Ocean Acidification Effects and Responses
- Arctic and Antarctic ice dynamics
- Fish Ecology and Management Studies
- Marine and environmental studies
- Methane Hydrates and Related Phenomena
- Food Industry and Aquatic Biology
- Oceanographic and Atmospheric Processes
- Microbial Community Ecology and Physiology
- Physiological and biochemical adaptations
- Fish Biology and Ecology Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Plant Ecology and Taxonomy Studies
- Aquaculture Nutrition and Growth
- Plant Ecology and Soil Science
- Diatoms and Algae Research
- Atmospheric and Environmental Gas Dynamics
- Environmental DNA in Biodiversity Studies
- Coral and Marine Ecosystems Studies
- Reproductive biology and impacts on aquatic species
- Metabolomics and Mass Spectrometry Studies
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2016-2025
University of Plymouth
2024
GEOMAR Helmholtz Centre for Ocean Research Kiel
2018
Woods Hole Oceanographic Institution
2000-2004
Plymouth Marine Laboratory
1999
University of Göttingen
1995
Frauenklinik Heidelberg
1971
Heidelberg University
1971
In this paper we review on the technologies available to make globally quantitative observations of particles, in general, and plankton, particular, world oceans, for sizes varying from sub-micron centimeters. Some these have been years while others only recently emerged. Use is critical improve understanding processes that control abundances, distributions composition provide data necessary constrain ecosystem biogeochemical models, forecast changes marine ecosystems light climate change....
Here we present a new, pan-Atlantic compilation and analysis of data on Calanus finmarchicus abundance, demography, dormancy, egg production mortality in relation to basin-scale patterns temperature, phytoplankton biomass, circulation other environmental characteristics the context understanding factors determining distribution abundance C. across its North Atlantic habitat. A number themes emerge: (1) south-to-north transport plankton northeast contrasts with north-to-south western...
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...
Herbivory is more prevalent in the tropics than at higher latitudes. If differences ambient temperature are direct cause for this phenomenon, then same pattern should be visible a seasonal gradient, as well experiments manipulating temperature. Using (15)N stable isotope analyses of natural populations copepod Temora longicornis we indeed observed trophic level and decrease with increasing In grazing experiment, mixed diet cryptophyte Rhodomonas salina heterotrophic dinoflagellate Oxyrrhis...
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...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 176:81-92 (1999) - doi:10.3354/meps176081 A high frequency time series at Weathership M, Norwegian Sea, during 1997 spring bloom: reproductive biology of Calanus finmarchicus Barbara Niehoff1,*, Ulrike Klenke1, Hans-Jürgen Hirche1, Xabier Irigoien2, Robert Head2, Roger Harris2 1Alfred Wegener Institute for...
Abstract In recent decades, the central Arctic Ocean has been experiencing dramatic decline in sea ice coverage, thickness and extent, which is expected to have a tremendous impact on all levels of marine life. Here, we analyze regional temporal changes pan‐Arctic distribution population structure key zooplankton species Calanus glacialis C. hyperboreus relation conditions, based historical (1993–1998) (2007–2016) collections satellite‐based observations. We found strong correlations between...
The retreating ice cover of the Central Arctic Ocean (CAO) fuels speculations on future fisheries. However, very little is known about existence harvestable fish stocks in this 3.3 million–square kilometer ecosystem around North Pole. Crossing Eurasian Basin, we documented an uninterrupted 3170-kilometer-long deep scattering layer (DSL) with zooplankton and small Atlantic water at 100- to 500-meter depth. Diel vertical migration central DSL was lacking most year when daily light variation...
MEPS Marine Ecology Progress Series Contact the journal Facebook (Twitter) RSS Mailing List Receive regular lists of newly published articles via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 172:127-137 (1998) - doi:10.3354/meps172127 A high frequency time series at weathership M, Norwegian Sea, during 1997 spring bloom: feeding adult female Calanus finmarchicus Xabier Irigoien1,*, Robert Head1, Ulrike Klenke2, Bettina Meyer-Harms1, Derek Harbour1, Barbara Niehoff2,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 254:81-100 (2003) - doi:10.3354/meps254081 Interannual variation in phytoplankton blooms and zooplankton productivity abundance Gulf of Maine during winter Edward G. Durbin1,*, Robert Campbell1, Maria C. Casas1, Mark D. Ohman2, Barbara Niehoff3, Jeffrey Runge4, Melissa Wagner1 1Graduate School Oceanography,...
Abstract. The increasing CO2 concentration in the atmosphere caused by burning fossil fuels leads to pCO2 and decreasing pH world ocean. These changes may have severe consequences for marine biota, especially cold-water ecosystems due higher solubility of CO2. However, studies on response mesozooplankton communities elevated are still lacking. In order test whether abundance taxonomic composition change with pCO2, we sampled nine mesocosms, which were deployed Kongsfjorden, an Arctic fjord...
Abstract The copepod species Calanus glacialis is an important component of arctic marine food webs, where it the numerically dominant zooplankton grazer and serves as a major prey item for fish, seabirds, other predators. These copepods are typically considered to be phytoplanktivorous, although they also known feed on microzooplankton, little about their diet in fall winter. To investigate feeding, C. gut contents were analyzed over annual cycle seasonally ice covered fjord using next...
Abstract As Arctic sea ice deteriorates, more light enters the ocean, causing largely unknown effects on ecosystem. Using an autonomous biophysical observatory, we recorded zooplankton vertical distribution under from dusk to dawn of polar night. Here show that ascend into under-ice habitat during autumn twilight, following isolume 2.4 × 10 −4 W m −2 . We applied this trigger CMIP6 model outputs accounting for incoming radiation after sunset and before sunrise The models project that, in...
Abstract In Fram Strait, we combined underway-sampling using the remote-controlled Automated Filtration System for Marine Microbes (AUTOFIM) with CTD-sampling eDNA analyses, and high-resolution optical measurements in an unprecedented approach to determine variability plankton composition response physical forcing a sub-mesoscale filament. We determined biomass near surface horizontal resolution of ~ 2 km, addressed vertical at five selected sites. Inside filament, was tightly linked...
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...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 219:205-219 (2001) - doi:10.3354/meps219205 A high-frequency time series at Ocean Weather Ship Station M (Norwegian Sea): population dynamics of Calanus finmarchicus Hans-Jürgen Hirche*, Thomas Brey, Barbara Niehoff Alfred Wegener Institute for Polar and Research, Columbusstr. 1, 27568 Bremerhaven, Germany...
Comau Fjord is a stratified Chilean Patagonian characterized by shallow brackish surface layer and >400 m of aragonite-depleted subsurface waters. Despite the energetic burden low aragonite saturation levels to calcification, harbours dense populations cold-water corals (CWC). While this paradox has been attributed rich supply zooplankton, supporting abundance biomass data are so far lacking. In study, we investigated seasonal diel changes zooplankton community over entire water column....