A5033891168- Marine and fisheries research
- Marine and coastal ecosystems
- Marine Bivalve and Aquaculture Studies
- Isotope Analysis in Ecology
- Fish Ecology and Management Studies
- Arctic and Antarctic ice dynamics
- Microbial Community Ecology and Physiology
- Genomics and Phylogenetic Studies
- Marine Biology and Ecology Research
- Aquaculture Nutrition and Growth
- Methane Hydrates and Related Phenomena
- Marine and environmental studies
- Ocean Acidification Effects and Responses
- Oceanographic and Atmospheric Processes
- Neurobiology and Insect Physiology Research
- Physiological and biochemical adaptations
- Food Industry and Aquatic Biology
- Protist diversity and phylogeny
- Atmospheric and Environmental Gas Dynamics
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Aquatic Ecosystems and Phytoplankton Dynamics
- Geological Studies and Exploration
- Environmental and Biological Research in Conflict Zones
- Marine Toxins and Detection Methods
University of Plymouth
2017-2025
University of East Anglia
2013-2023
Norwich Research Park
2020-2023
British Antarctic Survey
2006-2018
Continuous Plankton Recorder Survey
2016-2017
The University of Queensland
2017
University of Groningen
2013-2014
Natural Environment Research Council
2006-2014
GNS Science
2013
Institut Universitaire Européen de la Mer
2013
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 362:1-23 (2008) - DOI: https://doi.org/10.3354/meps07498 FEATURE ARTICLE Oceanic circumpolar habitats of Antarctic krill A. Atkinson1,*, V. Siegel2, E. Pakhomov3,4, P. Rothery5, Loeb6, R. M. Ross7, L. B. Quetin7, K. Schmidt1, Fretwell1, J. Murphy1, G. Tarling1, H. Fleming1 1British Survey, Natural Environment...
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....
The introduction of metagenomic sequencing to diagnostic microbiology has been hampered by slowness, cost and complexity. We explored whether MinION nanopore could accelerate diagnosis resistance profiling, using complicated urinary tract infections as an exemplar. Bacterial DNA was enriched from clinical urines (n = 10) healthy 'spiked' with multiresistant Escherichia coli 5), then sequenced MinION. Sequences were analysed external databases bioinformatic pipelines or, ultimately,...
Abstract. Antarctic krill (Euphausia superba) and salps are major macroplankton contributors to Southern Ocean food webs also fished commercially. Managing this fishery sustainably, against a backdrop of rapid regional climate change, requires information on distribution time trends. Many data the abundance both taxa have been obtained from net sampling surveys since 1926, but much is stored in national archives, sometimes only notebooks. In order make these important accessible we collated...
The use of stable isotopes to study food webs has increased rapidly, but there are still some uncertainties in their application. We examined the δ 15 N and 13 C values Antarctic euphausiids copepods from Polar Front, Lazarev Sea, Marguerite Bay against foodweb baseline particulate organic matter (POM). Interpretations trophic level were helped by comparison with other approaches calibration experiments Euphausia superba fed known diets. Results for well‐known mesozooplankters (e.g.,...
A compilation of more than 30 studies shows that adult Antarctic krill ( Euphausia superba ) may frequent benthic habitats year‐round, in shelf as well oceanic waters and throughout their circumpolar range. Net acoustic data from the Scotia Sea show summer 2‐20% population reside at depths between 200 2000 m, large aggregations can form above seabed. Local differences vertical distribution indicate reduced feeding success surface waters, either due to predator encounter or food shortage,...
Abstract Continental margins are disproportionally important for global primary production, fisheries and CO 2 uptake. However, across the Northeast Atlantic shelves, there has been an ongoing summertime decline of key biota—large diatoms, dinoflagellates copepods—that traditionally fuel higher tropic levels such as fish, sea birds marine mammals. Here, we combine multiple time series with in situ process studies to link these declines summer nutrient stress increasing proportions...
The rapid melt of snow and sea ice during the Arctic summer provides a significant source low-salinity meltwater to surface ocean on local scale. accumulation this on, under, around floes can result in relatively thin layers upper ocean. Due small-scale nature these upper-ocean features, typically order 1 m thick or less, they are rarely detected by standard methods, but nevertheless pervasive critically important summer. Observations Multidisciplinary drifting Observatory for Study Climate...
A healthy marine ecosystem is a fully functioning system, able to supply services whilst still maintaining resilience human-induced environmental change. Monitoring and managing the health of resilient ecosystems requires indicators that can assess their biodiversity state food web functioning. Plankton are crucial components pelagic habitats, occupying base web. Larger plankton have long been used monitor productivity due identification via traditional light microscopy. In contrast, regular...
Abstract Under climate change, model ensembles suggest that declines in phytoplankton biomass amplify into greater reductions at higher trophic levels, with serious implications for fisheries and carbon storage. However, the extent mechanisms of this amplification vary greatly among models, validation is problematic. In situ size spectra offer a novel alternative, comparing small larger organisms to quantify net efficiency energy transfer through natural food webs are already challenged...
We studied the diet of Antarctic krill, Euphausia superba, at five stations across southwest Atlantic sector in summer 2003 by analyzing stomach content, fatty acids, and stable isotopes on same individuals. Our aim was to examine what each method could contribute our understanding krill nutrition whether differences seen growth rates were linked their food. All three methods indicated clear regional diet, but small ontogenetic sex-related differences. Overall, diatoms most abundant item...
The overwintering success of Euphausia superba is a key factor that dictates population size, but there uncertainty over how they cope with the scarcity pelagic food. Both nonfeeding strategies (reduced metabolism, lipid use, or shrinkage in size) and switching to other foods (carnivory, ice algae, detritus) have been suggested. We examined these alternatives southwest Lazarev Sea autumn (April 1999), when sea was forming phytoplankton at winter concentrations. juveniles adults had very high...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 266:43-58 (2004) - doi:10.3354/meps266043 Trophic-level interpretation based on δ15N values: implications of tissue-specific fractionation and amino acid composition Katrin Schmidt1,5,*, James W. McClelland2,6, Eleni Mente3, Joseph P. Montoya2, Angus Atkinson4, Maren Voss1 1Institute for Baltic Sea Research...
Antarctic krill ( Euphausia superba ) were sampled in contrasting habitats: a seasonally ice‐covered deep ocean (Lazarev Sea), ice‐free shelves at their northern range (South Georgia) and the Peninsula (Bransfield Strait), shelf oceanic sites Scotia Sea. Across 92 stations, representing year‐round average, food volume stomachs comprised 71 ± 29% algae, 17 21% protozoans, 12 25% metazoans. Fatty acid trophic markers showed that copepods consistently part of diet, not switch food. In open...
Abstract Size‐spectral approaches quantify the efficiency of energy transfer through food webs, but theory and field studies disagree over how changes in temperature, nutrients, extreme weather impact on this efficiency. We address at two scales: via 6 years weekly sampling plankton size spectrum Plymouth L4 shelf sea site, a new, global‐scale, meta‐analysis aquatic spectra. The time series showed that with summertime nutrient starvation, from picoplankton to macroplankton decreased (i.e.,...
Eukaryotic phytoplankton are responsible for at least 20% of annual global carbon fixation. Their diversity and activity shaped by interactions with prokaryotes as part complex microbiomes. Although differences in their local species have been estimated, we still a limited understanding environmental conditions compositional between communities on large scale from pole to pole. Here, show, based pole-to-pole metatranscriptomes microbial rDNA sequencing, that polar non-polar upper oceans most...
Phytoplankton communities significantly contribute to global biogeochemical cycles of elements and underpin marine food webs. Although their uncultured genomic diversity has been estimated by planetary-scale metagenome sequencing subsequent reconstruction metagenome-assembled genomes (MAGs), this approach yet be applied for complex phytoplankton microbiomes from polar non-polar oceans consisting microbial eukaryotes associated prokaryotes.Here, we have assembled MAGs chlorophyll a maximum...
Leads play an important role in the exchange of heat, gases, vapour, and particles between seawater atmosphere ice-covered polar oceans. In summer, these processes can be modified significantly by formation a meltwater layer at surface, yet we know little about dynamics persistence. During drift campaign Multidisciplinary drifting Observatory for Study Arctic Climate (MOSAiC), examined how variation lead width, re-freezing, mixing events affected vertical structure waters during late summer...
ABSTRACT NO, a free radical gas, is the signal for Nitrosomonas europaea cells to switch between different growth modes. At an NO concentration of more than 30 ppm, biofilm formation by N. was induced. concentrations below 5 ppm led reversal formation, and numbers motile planktonic (motile-planktonic) increased. In proteomics approach, proteins expressed were identified. Comparison studies protein patterns motile-planktonic attached (biofilm) revealed several clear differences. Eleven found...