A5072330031- Marine and coastal ecosystems
- Marine Toxins and Detection Methods
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine Biology and Ecology Research
- Microbial Community Ecology and Physiology
- Isotope Analysis in Ecology
- Protist diversity and phylogeny
- Arctic and Antarctic ice dynamics
- Vibrio bacteria research studies
- Aquatic Ecosystems and Biodiversity
- Diatoms and Algae Research
- Microplastics and Plastic Pollution
- Methane Hydrates and Related Phenomena
- Plant and animal studies
- Paleontology and Stratigraphy of Fossils
- Geology and Paleoclimatology Research
- Recycling and Waste Management Techniques
- Myxozoan Parasites in Aquatic Species
- Aquatic Invertebrate Ecology and Behavior
British Antarctic Survey
2023-2024
Natural Environment Research Council
2024
University of Amsterdam
2013-2019
University of Nottingham
2019
Stony Brook University
2008-2014
Marine Institute
2011
Harmful algal blooms (HABs) cause significant economic and ecological damage worldwide. Despite considerable efforts, a comprehensive understanding of the factors that promote these has been lacking, because biochemical pathways facilitate their dominance relative to other phytoplankton within specific environments have not identified. Here, biogeochemical measurements showed harmful alga Aureococcus anophagefferens outcompeted co-occurring in estuaries with elevated levels dissolved organic...
Abstract Measures to reduce eutrophication have often led a more effective decline of phosphorus (P) than nitrogen (N) concentrations. The resultant changes in riverine nutrient loads can cause an increase the N : P ratios coastal waters. During four research cruises along 450 km transect, we investigated how reductions inputs during past 25 yr affected limitation patterns North Sea. This revealed strong offshore gradient dissolved inorganic spring, from 375 1 nearshore toward central was...
A key challenge in ecology is to understand how nutrients and light affect the biodiversity community structure of phytoplankton plant communities. According resource competition models, ratios limiting are major determinants species composition. At high nutrient levels, however, interactions may shift for light, which might make less relevant. The "nutrient-load hypothesis" merges these two perspectives, by extending classic model include light. Here, we test five predictions nutrient-load...
The presence of microplastic particles (<5 mm) in the environment has generated considerable concern across public, political, and scientific platforms. However, diversity microplastics that persist poses complex analytical challenges for our understanding their prevalence. use dye Nile red to quantify is increasingly common. its analysis rarely accounts affinity with breadth occur environmental samples. Here, we examine red's ability stain a variety common natural anthropogenic found To...
Niche-based theories and the neutral theory of biodiversity differ in their predictions how species composition natural communities will respond to changes nutrient availability. This is an issue major environmental relevance, as many ecosystems have experienced nitrogen (N) phosphorus (P) due anthropogenic manipulation loading. To understand N P limitation may impact community structure, we conducted laboratory competition experiments using a multispecies phytoplankton sampled from North...
Abstract Silica deposition by diatoms, a common component of the phytoplankton, has attracted considerable interest given importance in ecology and materials science. There recently been great deal research into biological control biosilicifcation, yet vivo physical chemical effects have not quantitatively investigated. We grown marine diatom Thalassiosira pseudonana batch culture at three temperatures (14 o , 18 23 ° C). observed distinct temperature-dependent growth phases. The morphology...
Large icebergs (>20 km long) are responsible for most of the freshwater discharged into Southern Ocean. We report on in situ and satellite observations made during break-up phase around South Georgia giant tabular iceberg A-68A. The measurements were obtained a 4-day visit by research vessel February 2021, where physical, chemical biological at range distances away from main subsidiary icebergs. These results compared to far-field station 133 away. Upstream field, water column structure was...
Abstract Despite their wide use in past sea-ice reconstructions, the seasonal, habitat and species-based sources of sedimentary proxies are poorly understood. Here, we conduct direct observations community composition diatoms, dinoflagellate cysts highly branched isoprenoid lipids within sea ice, water column, sediment traps surface Belcher Islands Archipelago, Hudson Bay throughout spring 2019. We find that Arctic diatom species commonly used as appear to be only indirectly linked...
One of the major challenges in ecological stoichiometry is to establish how environmental changes resource availability may affect both biochemical composition organisms and species communities. This a pressing issue many coastal waters, where anthropogenic activities have caused large riverine nutrient inputs. Here we investigate variation synthesis amino acids, fatty carbohydrates mixed phytoplankton communities sampled from North Sea. The were cultured chemostats supplied with different...
What explains the coexistence of species? Answering this question may help ecologists to predict how natural communities will respond environmental change. We transferred phytoplankton from North Sea laboratory competition experiments. The experiments resulted in two species. Monocultures revealed that these species were equivalent competitors for phosphorus. Yet, competition, displayed stable rather than random ecological drift predicted by neutral theory. Interestingly, used different...