A5089983220- Lepidoptera: Biology and Taxonomy
- Algebraic Geometry and Number Theory
- Entomological Studies and Ecology
- Plant and animal studies
- Species Distribution and Climate Change
- Polynomial and algebraic computation
- Calibration and Measurement Techniques
- Solar Radiation and Photovoltaics
- Aerospace and Aviation Technology
- Coding theory and cryptography
- Advanced Numerical Analysis Techniques
- Ecology and Vegetation Dynamics Studies
- Botany and Plant Ecology Studies
- Animal and Plant Science Education
- Homotopy and Cohomology in Algebraic Topology
- Finite Group Theory Research
- Commutative Algebra and Its Applications
- Advanced Topology and Set Theory
- Medieval European Literature and History
- Insect and Arachnid Ecology and Behavior
- Impact of Light on Environment and Health
- Diptera species taxonomy and behavior
- Point processes and geometric inequalities
- Hemiptera Insect Studies
- Adaptive optics and wavefront sensing
University of Exeter
2020-2024
Swansea University
2014
Université Lille Nord de France
2009
Université Polytechnique Hauts-de-France
1991-2006
Laboratoire de Mathématiques d'Orsay
1985-1999
Université de Bordeaux
1987
Institut de Mathématiques de Bordeaux
1987
Université de Bretagne Occidentale
1985
Pollinator declines, changes in land use and climate-induced shifts phenology have the potential to seriously affect ecosystem function food security by disrupting pollination services provided insects. Much of current research focuses on bees, or groups other insects together as 'non-bee pollinators', obscuring relative contribution this diverse group organisms. Prominent among pollinators' are hoverflies, known visit at least 72% global crops, which we estimate be worth around US$300...
Migratory insects are a key component of terrestrial ecosystems, but understanding their full contribution is challenging as they difficult to track, and migration often takes place at high altitude. Migration hotspots offer an exceptional opportunity study these otherwise indiscernible movements can be visible ground level; however events also ephemeral reported only from chance encounters. It therefore fully characterise the range number species involved, drivers or appreciate potential...
Insects are capable of extraordinary feats long-distance movement that have profound impacts on the function terrestrial ecosystems. The ability to undertake these movements arose multiple times through evolution a suite traits make up migratory syndrome, however underlying genetic pathways involved remain poorly understood. Migratory hoverflies (Diptera: Syrphidae) an emerging model group for studies migration. They seasonal in huge numbers across large parts globe and important...
In autumn 1950 David and Elizabeth Lack chanced upon a huge migration of insects birds flying through the Pyrenean Pass Bujaruelo, from France into Spain, later describing spectacle as combining both grandeur novelty. The intervening years have seen many changes to land use climate, posing question current status this migratory phenomenon. addition, lack quantitative data has prevented insights ecological impact mass insect factors that may influence it. To address this, we revisited site in...
Daytime migrants are known to orientate using the position of sun, compensating for its changing throughout day with a ‘time-compensated sun compass'. This compass has been demonstrated in many migratory species, various degrees accuracy actual movement sun. Here, we present model differing levels compensation solar ephemeris that shows high degree efficiency, terms distance travelled, can be achieved without full time compensation. In our model, sun's had diminishing return an 80% leading...
The sun is the most reliable celestial cue for orientation available to daytime migrants. It widely assumed that diurnal migratory insects use a ‘time-compensated compass’ adjust changing position of throughout day, as demonstrated in some butterfly species. mechanisms used by other groups insect migrants remain be elucidated. Migratory species hoverflies (Diptera: Syrphidae) are one abundant and beneficial migrants, providing multiple ecosystem services undergoing directed seasonal...
Migratory hoverflies are long-range migrants that, in the Northern Hemisphere, move seasonally to higher latitudes spring and lower autumn. The preferred migratory direction of autumn has been subject radar flight simulator studies, while migration proved be more difficult characterize owing a lack ground observations. Consequently, during only inferred from entomological studies patterns local abundance, currently lacks confirmation. Here, springtime arrival insects onto Isles Scilly...
Abstract In 1950 David and Elizabeth Lack chanced upon a huge migration of insects birds flying through the Pyrenean Pass Bujaruelo, later describing spectacle as combining both grandeur with novelty. The intervening years have seen many changes to land use climate, posing question current status this migratory phenomenon, while lack quantitative data has prevented insights into ecological impact mass insect factors affecting it. To address this, we revisited site in autumn over 4-year...
<ns3:p>We present a genome assembly from an individual female <ns3:italic>Scaeva pyrastri</ns3:italic><ns3:italic> </ns3:italic>(the pied hoverfly; Arthropoda; Insecta; Diptera; Syrphidae). The sequence is 320 megabases in span. Most of the scaffolded into four chromosomal pseudomolecules, including assembled X chromosome. mitochondrial has also been and 17.3 kilobases length. Gene annotation this on Ensembl identified 11,352 protein coding genes.</ns3:p>
Massy R. A l'apothicairerie de l'Hotel Royal des Invalides. Le conflit 1772 entre l'administration et les Filles la Charite. In: Revue d'histoire pharmacie, 42ᵉ annee, n°142, 1954. pp. 315-324.
Let k be a number field. We prove that the set of Steinitz clases quadratic extensions K/ which can embedded in quaternionic degree 8, tamely or wildly ramified over k, is full class group Cl(k) k. Moreover, we provide explicit formulas to construct these extensions.
We introduce a Galois theory for parallelograms of infinite degree. This improves widely the results [8]. In particular, we generalize Krull theorem extensions.
Abstract Migratory hoverflies are long-range migrants that, in the northern hemisphere, move seasonally to higher latitudes spring and lower autumn. The preferred migratory direction of autumn has been subject radar flight simulator studies while migration proved be more difficult characterise due a lack ground observations. Consequently, during only inferred from entomological patterns local abundance currently lacks confirmation. Here, springtime arrival insects onto Isles Scilly mainland...