A5065106567- Marine and coastal ecosystems
- Protist diversity and phylogeny
- Microbial Community Ecology and Physiology
- Marine Toxins and Detection Methods
- Diatoms and Algae Research
- Marine Biology and Ecology Research
- Algal biology and biofuel production
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal plant biology
- Biocrusts and Microbial Ecology
- Geology and Paleoclimatology Research
- Paleontology and Stratigraphy of Fossils
- Cephalopods and Marine Biology
- Genomics and Phylogenetic Studies
- Methane Hydrates and Related Phenomena
- Environmental DNA in Biodiversity Studies
- Polar Research and Ecology
- Micro and Nano Robotics
- Analytical chemistry methods development
- Plant Pathogens and Resistance
- Nematode management and characterization studies
- Evolution and Genetic Dynamics
- Parasitic Infections and Diagnostics
- Plant Diversity and Evolution
- Plant Pathogens and Fungal Diseases
University of Copenhagen
2015-2024
Copenhagen Institute for Futures Studies
1974-1993
The University of Sydney
1987
University of Illinois Urbana-Champaign
1973-1975
University of Leeds
1970
Abstract. This revision of the classification unicellular eukaryotes updates that Levine et al. (1980) for protozoa and expands it to include other protists. Whereas previous was primarily incorporate results ultrastructural studies, this incorporates from both research since 1980 molecular phylogenetic studies. We propose a scheme is based on nameless ranked systematics. The vocabulary taxonomy updated, particularly clarify naming groups have been repositioned. recognize six clusters may...
Evidence from partial large-subunit (LSU) rDNA sequencing has been combined with ultrastructure, including details of the flagellar apparatus, in a number phototrophic dinoflagellates, aim trying to solve some most pressing taxonomic problems and contribute an improved understanding phylogeny within group. Special attention paid unarmoured (naked) genera, many which were described during 1800s or early 1900s whose taxonomy is artificial misleading. This particularly unsatisfactory because...
No abstract available.
the origin of echolocation and flight in bats. Nature 403:188– 192. van Rheede, T., T. Bastiaans, D. N. Boone, S. B. Hedges, W. de Jong, O. Madsen. 2006. The platypus its place: nuclear genes indels confirm sister group relation monotremes therians. Mol. Biol. Evol. 23:587–597. Waddell, P. J., H. Kishino, R. Ota. 2001. A phylogenetic foundation for comparative mammalian genomics. Genome Informatics 12:141– 154. Okada, M. Hasegawa. 1999. Towards resolving interordinal relationships placental...
Based on morphological variation found in specimens ascribed to Pseudo‐nitzschia pseudodelicatissima and uncertainty regarding the delineation of P. cuspidata , cultures field material diatoms pseudodelicatissima/cuspidata complex were studied detail. Four different species identified. The descriptions emended basis studies type material. In addition, calliantha sp. nov. caciantha described as new based molecular data. differences among characters such width shape valve, density fibulae...
A study of 25 cultures tentatively identified as Pseudo‐nitzschia delicatissima (Cleve) Heiden, and originating from geographically widely distributed locations, showed both morphological genetic variation among strains. Use rRNA‐targeted DNA probes on 17 different strains large in the hybridization patterns. Detailed studies placed isolates into three groups. The sample which neotype P. is based was also examined, used to establish identity P . Phylogenetic analyses 16 strains, sequences...
Abstract In order to elucidate the phylogeny and evolutionary history of Bacillariaceae we conducted a phylogenetic analysis 42 species (sequences were determined from more than two strains many Pseudo-nitzschia species) based on first 872 base pairs nuclear-encoded large subunit (LSU) rDNA, which include some most variable domains. Four araphid genera used as outgroup in maximum likelihood, parsimony distance analyses. The inferences revealed monophyletic (bootstrap support ≥90%). A clade...
An undescribed species of the dinoflagellate genus Karlodinium J. Larsen (viz. K. armiger sp. nov.) is described from Alfacs Bay (Spain), using light and electron microscopy, pigment composition, partial large subunit (LSU) rDNA sequence. The new differs type ( micrum (Leadbeater et Dodge) Larsen) by lacking rows amphiesmal plugs, a feature presently considered to be characteristic . In , an outer membrane underlain complex system cisternae vacuoles. profile revealed presence chlorophylls c...
No abstract available.
Abstract The marine nanoplankton of New Zealand has been examined for the first time by a combination transmission and scanning electron microscopy. Of c. 50 taxa found, practically all are known also from Northern Hemisphere. As in this part world, consists mainly members systematic groups Chrysophyceae, Prymnesiophyceae (Haptophyceae), Loxo- Prasinophyceae, Choanoflagellida. Four new species described: prymnesiophytes Chrysochromulina novae-zelandiae Phaeocystis scrobiculata,...
Quijano-Scheggia S., Garcés E., Lundholm N., Moestrup Ø., Andree K. and Camp J. 2009. Morphology, physiology, molecular phylogeny sexual compatibility of the cryptic Pseudo-nitzschia delicatissima complex (Bacillariophyta), including description P. arenysensis sp. nov. Phycologia 48: 492–509. DOI: 10.2216/08-21.1
SUMMARY The well known freshwater dinoflagellate Woloszynskia pseudopalustris is transferred to the new genus Biecheleria , based on very unusual structure of eyespot (comprising a stack cisternae), apical apparatus single elongate amphiesma vesicle, resting cyst, and molecular data. phylogenetically related Symbiodinium Polarella family Suessiaceae. This family, which extends back Jurassic, redefined with (Type E sensu Moestrup Daugbjerg) as diagnostic features, unknown elsewhere in...
"Marine benthic dinoflagellates—unveiling their worldwide biodiversity.." Phycologia, 54(1), pp. 87–88
ABSTRACT. The mixotrophic dinoflagellate Paragymnodinium shiwhaense n. gen., sp. is described from living cells and prepared by light, scanning electron, transmission electron microscopy. In addition, sequences of the small subunit (SSU) large (LSU) rDNA photosynthetic pigments are reported. episome conical, while hyposome hemispherical. Cells covered with polygonal amphiesmal vesicles arranged in 16 rows containing a very thin plate‐like component. There neither an apical groove nor line...
The zoospores of the green alga Chaetosphaeridium globosum are covered on all surfaces with tiny diamond-shaped scales similar to those prasinophycean flagellates and Charales. flagella also bear striated hairs (hair scales) so far considered be a characteristic Prasinophyceae. flagellar apparatus differs from that observed in Prasinophyceae, shows many similarities Charales, is identical “Vierergruppe” pteridophytes, cycads bryophytes. opisthokont, two inserted subapically. There lateral...