A5050148048- Marine and coastal plant biology
- Marine Biology and Ecology Research
- Marine and coastal ecosystems
- Marine Ecology and Invasive Species
- Diatoms and Algae Research
- Environmental Science and Water Management
- Botany and Plant Ecology Studies
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Marine Biology and Environmental Chemistry
- Isotope Analysis in Ecology
- Lichen and fungal ecology
- Seaweed-derived Bioactive Compounds
- Plant Ecology and Soil Science
- Protist diversity and phylogeny
- Food Quality and Safety Studies
- Maritime and Coastal Archaeology
- Coastal and Marine Management
- Mediterranean and Iberian flora and fauna
- Myxozoan Parasites in Aquatic Species
- Cephalopods and Marine Biology
- Environmental Conservation and Management
- Algal biology and biofuel production
- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2000-2003
Centre d’Étude et de Valorisation des Algues
1999
University of Konstanz
1985-1996
Memorial University of Newfoundland
1988-1995
The induction of UV‐absorbing compounds known as mycosporine‐like amino acids (MAAs) by red, green, blue, and white light (43% ambient radiation greater than 390 nm) was examined in sublittoral Chondrus crispus Stackh. Fresh collections or long‐term cultures thalli, collected from Helgoland, North Sea, Germany, containing no measurable amounts MAAs, were exposed to filtered natural for up 40 days. MAA palythine (λ max 320 synthesized thalli blue the same extent observed control samples...
Abstract. The analysis of biological and ecological traits has a long history in evolutionary research. However, trait data are often scattered standardised terminology that transcends taxonomic biogeographical context generally missing. As part the development global database marine species, we collated information for European seaweeds structured within framework World Register Marine Species (WoRMS). We collected 45 175 records 21 biologically ecologically relevant seaweeds. This resulted...
Abstract The complete life histories of Tilopteris mertensii and haplospora globosa were followed in culture. shows a succession identical plants through uninucleate "eggs" which develop parthenogenetically. In Haplospora, sporophytes alternate with gametophytes without sexuality nuclear alternation. However, evidence for meiotic stages is found sporangium initials. Gametophytes produce oogonia antheridia, eggs chromosome number n = 62 (60–65). both phases Haplospora numbers are 50 (43–54)....
The present compilation is the first attempt to generate a comprehensive list of all macrozoobenthic species recorded at least once in German regions North Sea and Baltic including non-indigenous freshwater which occurred brackish waters (estuaries, bays, fjords etc.). Based on data several research institutes consultancies, inventory comprises total 1.866 belonging 16 phyla 193 threatened species. most common groups were: malacostracan crustaceans (21%), Polychaeta (19%), Gastropoda (12%)....
The spionid polychaete Boccardia proboscidea Hartman, 1940 is a tube-dweller and shell/stone-borer widely occurring in temperate waters across the world considered invasive many areas. It was originally described from California, USA, later reported Pacific Canada, Asian Pacific, Australia, New Zealand, Argentina, South Africa, northern Europe. Bayesian inference analysis of sequence data three gene fragments (836 bp total) mitochondrial 16S rDNA, nuclear 28S Histone 3 has shown that...
Sensitivity to ultraviolet (UV) radiation (UV-A, λ = 315-400 nm; plus UV-B, 280-315 nm) of zygotes the brown alga Fucus serratus L. (Phaeophyta) has been assessed through effects on growth developing germlings. Different stages development were distinguished by considering 5 h periods time after fertilisation. Both stage zygote and UV condition significantly affected The negative response rate early seemed be caused UV-B rather than UV-A radiation, as lowest relative rates always estimated...
Phaeosiphoniella cryophila gen. et sp. nov. is described and placed in the order Tilopteridales (Phaeophyceae). The irregularly branched filaments grow by subapical intercalary meristems become multiseriate lower portions. major reproductive mechanism vegetative fragmentation through specialized abscission of terminal branch systems. occurrence oogonia antheridia indicates at least vestiges sexual reproduction. Neutral plurilocular sporangia are also produced. P. occurs period minimum water...
ABSTRACT The brown algal order Tilopteridales contains three monospecific genera with reduced life histories, Which are assumed to have been derived form ancestors oogamous reproduction and alternation of generations. Newfoundland population Haplospora globosa Kjellman still shows an gametophytes sporophytes, but the chromosome Numbers remain equal because parthenogenesis apomeiosis, However, DNA fluorometry showed that level is twice as high in Sporophytes gametophytes, variation at...
Abstract. The analysis of biological and ecological traits has a long history in evolutionary research. However, trait data are often scattered standardised terminology that transcends taxonomic biogeographical context generally missing. As part the development global database marine species, we collated information for European seaweeds structured within framework World Register Marine Species (WoRMS). We collected 45,175 records 21 biologically ecologically relevant seaweeds. This resulted...