A5047431769- Diatoms and Algae Research
- Microbial Community Ecology and Physiology
- Polar Research and Ecology
- Environmental DNA in Biodiversity Studies
- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Protist diversity and phylogeny
- Marine and coastal plant biology
- Coastal wetland ecosystem dynamics
Freie Universität Berlin
2022-2024
Botanic Garden and Botanical Museum Berlin
2022-2024
Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
2022
Antarctic algae are exposed to prolonged periods of extreme darkness due polar night, and coverage by ice snow can extend such dark conditions up 10 months. A major group microalgae in benthic habitats Antarctica diatoms, which key primary producers these regions. However, the effects extremely exposure on their photosynthesis, cellular ultrastructure, cell integrity remain unknown. Here we show that five strains diatoms exhibit an active photosynthetic apparatus despite months...
Temperature and salinity are some of the most influential abiotic parameters shaping biota in aquatic ecosystems. In recent decades, climate change has had a crucial impact on both factors—especially around Antarctic Peninsula—with increasing air water temperature leading to glacial melting accompanying freshwater increase coastal areas. soft hard bottoms typically inhabited by microphytobenthic communities, which often dominated benthic diatoms. Their physiology primary production assumed...
Abstract In Kongsfjorden (Spitsbergen), we quantified the zonation of visually dominant macroalgal taxa and detached macroalgae from underwater videos taken in summer 2009 at six transects between 2 138 m water depth. For first time, provide information on occurrence deep red algae below kelp forest depth > 30 m. The presence distribution were especially pronounced outer fjord, decreased with proximity to glacial front they absent innermost locations. Deepest crustose coralline foliose...
In polar regions, the microphytobenthos has important ecological functions in shallow-water habitats, such as on top of coastal sediments. This community is dominated by benthic diatoms, which contribute significantly to primary production and biogeochemical cycling while also being an component food webs. Polar diatoms are able cope with markedly changing light conditions prolonged periods darkness during night Antarctica. However, underlying mechanisms poorly understood. this study, five...
Polar regions are among the most extreme habitats on Earth. However, diatom biodiversity in those is much more extensive and ecologically diverse than previously thought. The objective of this study was to add knowledge benthic Western Antarctic coastal zones via identification by means morphology, DNA metabarcoding cultured isolates. In addition, a taxonomically validated reference library for diatoms established with comprehensive information habitat, morphology barcodes ( rbc L 18SV4)....
The Euphrates-Tigris catchment area is one of the major drainage basins in Middle East but climate change, overuse waters and subsequent salinization has brought this region to brink ecological devastation. aim study was investigate biodiversity epiphytic diatoms Iraq, for first time using a combination morphological metabarcoding methods. 47 samples were collected at six sampling sites along Rivers Tigris Euphrates northern Basra, Southern during summer 2019 (dry season) winter 2020 (rainy...
The diatom genus Chamaepinnularia was first published by Lange-Bertalot et Krammer in 1996 to accommodate several small species previously included within Navicula and Pinnularia.Despite its morphological similarity those two genera, the family-level classification of has been considered incertae sedis since description almost three decades ago.We provide molecular characterisation (18S rbcL) based on cultured polar strains investigated phylogenetic placement.Molecular data are complemented...
Abstract This study aimed to investigate the presence and diversity of fungal parasites in Arctic coastal microphytobenthic communities. These communities represent a key component functioning trophic food webs. Fungal parasites, particularly Chytridiomycota (chytrids), play significant roles by controlling microalgal bloom events, impacting genetic diversity, modifying microbial interactions, accelerating nutrient energy transfer higher levels. In context rapid warming increased glacier...