A5025753340- Geology and Paleoclimatology Research
- Cryospheric studies and observations
- Polar Research and Ecology
- Pleistocene-Era Hominins and Archaeology
- Diatoms and Algae Research
- Microbial Community Ecology and Physiology
- Mercury impact and mitigation studies
- Marine Biology and Ecology Research
- Marine animal studies overview
- Environmental Monitoring and Data Management
Charles University
2018-2024
UiT The Arctic University of Norway
2022-2024
Abstract The Greenland Ice Sheet is currently not accounted for in Arctic mercury budgets, despite large and increasing annual runoff to the ocean socio-economic concerns of high levels organisms. Here we present concentrations meltwaters from three glacial catchments on southwestern margin evaluate export downstream fjords based samples collected during summer ablation seasons. We show that dissolved are among highest recorded natural waters yields these (521–3,300 mmol km −2 year −1 ) two...
We have studied laminated sediments from Lake Esmeralda, Vega Island, in order to reconstruct its history. describe both inorganic and organic components of the sediment using a combination following analytical methods: x-ray fluorescence (XRF), diffraction (XRD), magnetic susceptibility measurement, chemical analysis for determination cation exchange capacity, grain size determination, geochemical analyses (total carbon (TIC), total (TOC), sulphur (TS)), spectrophotometry, high-pressure...
Lentic waterbodies provide terrestrial sedimentary archives of palaeoenvironmental change in deglaciated areas the Antarctic. Knowledge long-term evolution Antarctic palaeoenvironments affords important context to current marked impacts climate Polar regions. Here, we present a comprehensively dated, multi-proxy record from Monolith Lake, distal proglacial lake one largest ice-free Peninsula region. Of two defined units cores studied, lower Unit 1 exhibits homogeneous composition and...
Glacial meltwater drains into proglacial rivers where it interacts with the surrounding landscape, collecting microbial cells as travels downstream. Characterizing composition of resulting assemblages in transport can inform us about intra-annual changes flowpaths beneath glacier well hydrological connectivity areas. Here, we investigated how structure suspended evolves over course a melt season for three catchments Greenland Ice Sheet (GrIS), reasoning that differences size and proportion...
Diatoms are useful ecological and paleolimnological indicators routinely used to reconstruct past conditions monitor environmental change. Despite this, diatom assemblages from lake sediment cores often difficult interpret due a limited knowledge of the ecology some species, which may originate adjacent limno-terrestrial landscape. Here, we compare two recently published Antarctic collected northeast southwest sides Vega Island, Peninsula. We further core with modern communities inhabiting...
Following an earlier revision of the genus Hantzschia (Bacillariophyta) in Maritime Antarctic Region, several at present unidentified or poorly known taxa this aerophilic have been investigated using both light and scanning electron microscopy. Based on morphological analysis observations, three new species are currently described: australabundans sp. nov., H. zidarovae nov. zikmundiana The differ from comparable valve outline, structure internal proximal raphe endings striae areolae....
<p>Glaciers and ice sheets host diverse microbial life within the hydrologically connected supraglacial, englacial, subglacial habitats. Microbial cells are collected from entire glacial ecosystem by seasonally-generated meltwater exported proglacial streams. Over course of melt season, a drainage system develops beneath outlet glaciers Greenland Ice Sheet (GrIS). This evolves an inefficient distributed network to more efficient channelized pathway. The extent interconnectivity...