A5063199429- Arctic and Antarctic ice dynamics
- Marine and fisheries research
- Food Industry and Aquatic Biology
- Marine animal studies overview
- Isotope Analysis in Ecology
- Marine Bivalve and Aquaculture Studies
- Freezing and Crystallization Processes
- Marine and environmental studies
- Methane Hydrates and Related Phenomena
- Arctic and Russian Policy Studies
- Cryospheric studies and observations
- Marine and coastal ecosystems
- Ocean Acidification Effects and Responses
- Fish Ecology and Management Studies
- Marine Biology and Ecology Research
- Indigenous Studies and Ecology
- Climate change and permafrost
- Polar Research and Ecology
- Oceanographic and Atmospheric Processes
- Environmental DNA in Biodiversity Studies
- Geological Studies and Exploration
- Oral and gingival health research
- Marine and coastal plant biology
- Scientific Research and Discoveries
- Atmospheric and Environmental Gas Dynamics
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2016-2025
Museum am Rothenbaum
2014-2021
Universität Hamburg
2015-2021
British Antarctic Survey
2020
Ocean Atmosphere Systems (Germany)
2020
University College London
2020
University of Manitoba
2020
Wageningen University & Research
2008-2009
University of Groningen
2006-2009
Altera (United States)
2004
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 458:1-19 (2012) - DOI: https://doi.org/10.3354/meps09831 FEATURE ARTICLE: REVIEWImpact of climate change on Antarctic krill H. Flores1,2,*, A. Atkinson, S. Kawaguchi, B. Krafft, G. Milinevsky, Nicol, C. Reiss, Tarling, R. Werner, E. Bravo Rebolledo, V. Cirelli, J. Cuzin-Roudy, Fielding, Groeneveld, M....
To better predict ecological consequences of changing Arctic sea ice environments, we aimed to quantify the contribution algae-produced carbon (αIce) pelagic food webs in central Ocean. Eight abundant under-ice fauna species were submitted fatty acid (FA) analysis, bulk stable isotope analysis (BSIA) nitrogen (δ15N) and (δ13C) isotopic ratios, compound-specific (CSIA) δ13C trophic marker FAs. A high mean αIce was found Apherusa glacialis other sympagic (ice-associated) amphipods (BSIA: 87%...
Abstract. The ice-covered central Arctic Ocean is characterized by low primary productivity due to light and nutrient limitations. recent reduction in ice cover has the potential substantially increase phytoplankton production, but little yet known about fate of ice-associated production supply with increasing warming. This study presents results from collected during summer 2012, when sea-ice extent reached its lowest ever recorded since onset satellite observations. Net (NPP) was measured...
One of the recently recognised stressors in Arctic ecosystems concerns plastic litter. In this study, juvenile polar cod (Boreogadus saida) were investigated for presence plastics their stomachs. Polar is considered a key species ecosystem. The fish collected both directly from underneath sea ice Eurasian Basin and open waters around Svalbard. We analysed stomachs 72 individuals under stereo microscope. Two contained non-fibrous microplastic particles. According to µFTIR analysis, particles...
The association of Antarctic krill Euphausia superba with the under-ice habitat was investigated in Lazarev Sea (Southern Ocean) during austral summer, autumn and winter. Data were obtained using novel Surface Under Ice Trawls (SUIT), which sampled 0-2 m surface layer both under sea ice open water. Average densities ranged between 0.8 individuals m(-2) summer autumn, 2.7 In significantly higher than waters. opposite pattern observed. winter ice, often low, but repeatedly far exceeded maxima....
A rigorous synthesis of the sea-ice ecosystem and linked services highlights that supports all 4 service categories, ecosystems meet criteria for ecologically or biologically significant marine areas, global emissions driving climate change are directly to demise its services, deserves specific attention in evaluation protected area planning. The outlines (1) supporting provided form habitat, including feeding grounds nurseries microbes, meiofauna, fish, birds mammals (particularly key...
In the Southern Ocean, several zooplankton taxonomic groups, euphausiids, copepods, salps and pteropods, are notable because of their biomass abundance roles in maintaining food webs ecosystem structure function, including provision globally important services. These groups consumers microbes, primary secondary producers, prey for fishes, cephalopods, seabirds, marine mammals. providing link between production, higher trophic levels these taxa influence energy flows, biological production...
Arctic cod (Boreogadus saida) is the most abundant forage fish in Ocean. Here we review habitats, distribution, ecology, and physiology to assess how climate change other anthropogenic stressors are affecting this key species. This identifies vulnerabilities for different life stages across entire distribution range of cod. We explore impact environmental (abiotic biotic) on with a regional perspective scenario up year 2050 identify knowledge gaps constraining predictions. Epipelagic eggs...
Information on connectivity and genetic structure of marine organisms remains sparse in frontier ecosystems such as the Arctic Ocean. Filling these knowledge gaps becomes increasingly urgent, is undergoing rapid physical, ecological socio-economic changes. The abundant widely distributed polar cod (Boreogadus saida) highly adapted to waters, its larvae juveniles live close association with sea ice. Through a reduced-representation sequencing approach, this study explored spatial at...
Antarctic krill Euphausia superba ('krill') constitute a fundamental food source for seabirds and mammals, globally important fisheries resource. The future resilience of to climate change depends critically on the winter survival young krill. To survive periods extremely low production by pelagic algae during winter, are assumed rely partly carbon produced ice algae. true dependency algae-produced carbon, however, is so far unquantified. This confounds predictions stocks sea decline. Fatty...
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...
Abstract How the abundant pelagic life of Southern Ocean survives winter darkness, when sea is covered by pack ice and phytoplankton production nearly zero, poorly understood. Ice‐associated (“sympagic”) microalgae could serve as a high‐quality carbon source during winter, but their significance in food web so far unquantified. To better understand importance algae‐produced for overwintering Antarctic organisms, we investigated fatty acid (FA) stable isotope compositions 10 zooplankton...
In this study, we present unique data collected with a Surface and Under-Ice Trawl (SUIT) during five campaigns between 2012 2017, covering the spring to summer autumn transition in Arctic Ocean, seasons of winter Southern Ocean. The SUIT was equipped sensor array from which retrieved: sea-ice thickness, light field at underside sea ice, chlorophyll concentration ice (in-ice chl a), salinity, temperature, under-ice water. With an average trawl distance about 2 km, global transect length more...
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...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 522:15-32 (2015) - DOI: https://doi.org/10.3354/meps11156 Community structure of under-ice fauna in Eurasian central Arctic Ocean relation environmental properties sea-ice habitats Carmen David1,2,*, Benjamin Lange1,2, Rabe1, Hauke Flores1,2 1Alfred Wegener Institut Helmholtz-Zentrum für Polar- und...
Abstract Historical sea ice core chlorophyll‐ a (Chl ) data are used to describe the seasonal, regional, and vertical distribution of algal biomass in Antarctic landfast ice. The analyses based on Fast Ice Algae Chlorophyll‐ set, compilation currently available Chl from cores collected at circum‐Antarctic nearshore locations between 1970 2015. were typically sampled thermodynamically grown first‐year have thin snow depths (mean = 0.052 ± 0.097 m). set comprises 888 cores, including 404 full...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 580:101-115 (2017) - DOI: https://doi.org/10.3354/meps12309 Spatio-temporal variability in winter diet of larval and juvenile Antarctic krill, Euphausia superba, ice-covered waters Fokje L. Schaafsma1,*, Doreen Kohlbach2,3, Carmen David2,3, Benjamin A. Lange2,3, Martin Graeve2, Hauke Flores2,3, Jan van...
Multiscale sea ice algae observations are fundamentally important for projecting changes to ecosystems, as the physical environment continues change. In this study, we developed upon previously established methodologies deriving ice-algal chlorophyll a concentrations (chl a) from spectral radiation measurements, and applied these larger-scale surveys. We conducted four different under-ice measurements: irradiance, radiance, transmittance, transflectance, three statistical approaches:...