David Boertmann

Aarhus University | AU · Department of Ecoscience, sect. Arctic Environment

Novel species of fungi described in this study include those from various countries as follows: Antarctica, Leuconeurospora bharatiensis from accumulated snow sediment sample. Argentina, Pseudocercospora quetri on leaf spots of Luma apiculata. Australia, Polychaetomyces verrucosus on submerged decaying wood in sea water, Ustilaginoidea cookiorum on...

Hygrophorus citrinofuscus is a striking and rarely reported grassland species originally described by J. Favre from the Swiss Alps. In absence of sequence data for the type specimen, a recent collection from Austria, which is well documented based on morphology and sequence data, is designated as the epitype of H. citrinofuscus to stabilise the spe...

The warming of the Arctic had lead to a diverse range of impacts on local biota, including northward shifts of some species range. Here, we report past and present distribution and abundance of an Arctic zooplanktivorous seabird, the little auk Alle alle in West Greenland south of 74° N, and examine the changes in sea surface temperature (SST) and...

Hygrocybe alpina and Hygrocybe amara are described here as new species closely related to Hygrocybe mucronella. Hygrocybe alpina is described from Slovakia and Sweden, but is probably more widespread, especially in alpine regions of Central and Northern Europe. Hygrocybe amara, a well delimited species based on molecular characters, is known only f...

Bowhead whales (Baleana mysticetus) are usually away from west Greenland waters during summer. Reported here is an observation of at least six bowhead whales in July 2022 in the Uummannaq Fjord system of west Greenland.

With the projected increases in shipping activity and hydrocarbon extraction globally, there is an increased risk of negative ecological impacts from oil pollution on the marine environment, including seabirds. Oil Vulnerability Indices (OVIs) are a common approach to assess seabird species vulnerability to oil pollution and to identify where speci...

Divergence in the face of high dispersal capabilities is a documented but poorly understood phenomenon. The white‐tailed eagle (Haliaeetus albicilla) has a large geographic dispersal capability and should theoretically be able to maintain genetic homogeneity across its dispersal range. However, following analysis of the genomic variation of white‐t...

The breeding population of Brünnich’s Guillemot Uria lomvia in South and West Greenland has been decreasing for decades and some colonies have even disappeared (Merkel et al. 2014). Among these was one of the largest colonies, Salleq in Uummannaq Fjord (70°96’N 52°25’W; Figure 1), which was estimated at half a million birds in c. 1920 (Bertelsen 19...

Neohygrocybe pseudoingrata, a new waxcap species known from Slovakia and the Czech Republic, is characterised by its pale greyish coloured and often robust basidiomata (or sporocarps), nitrous smell, context without colour changes, hollow, contorted and compressed stipe and smooth or slightly fibrillose pileus surface. Based on morphology and DNA a...

In the originally published version of this manuscript, the last name of author David Boertmann was inadvertently misspelled as ‘Boetmann’.

Vagrancy is critical in facilitating range expansion and colonization through exploration and occupation of potentially suitable habitat. Uncovering origins of vagrants will help us better understand not only species-specific vagrant movements, but how the dynamics of a naturally growing population influence vagrancy, and potentially lead to range...

Polonium-210 (²¹⁰Po) is a radionuclide sentinel as it bioaccumulates in marine organisms, thereby being the main contributor to committed dietary doses in seafood consumers. Although seafood and marine mammals are an important part of the traditional Inuit diet, there is a general lack of information on the ²¹⁰Po concentrations in the Greenlandic m...

Novel species of fungi described in this study include those from various countries as follows: Algeria, Phaeoacremonium adelophialidum from Vitis vinifera. Antarctica, Comoclathris antarctica from soil. Australia, Coniochaeta salicifolia as endophyte from healthy leaves of Geijera salicifolia, Eremothecium peggii in fruit of Citrus australis, Micr...

Novel species of fungi described in this study include those from various countries as follows: Algeria , Phaeoacremonium adelophialidum from Vitis vinifera . Antarctica , Comoclathris antarctica from soil. Australia , Coniochaeta salicifolia as endophyte from healthy leaves of Geijera salicifolia , Eremothecium peggii in fruit of Citrus australis...

Hygrocybe fulgens is characterised by a dry, squamulose applanate pileus, dry, smooth and broad stipe, pileipellis a trichoderm, ellipsoid to oblong spores, and by a size and colour of whole sporocarps, which are usually orange yellow, often with golden yellow stipe and darker (almost scarlet red) central part of pileus. Due to these features, this...

Danish landscapes have seen greater changes in the last 200 years than most people probably imagine. In the early 19th century, forest cover had been reduced to a few percent of the land area, and the other landscapes were dominated by heaths, commons, meadows and depleted fields. Nowadays, not only is there about five times as much forest, but the...

In July 2019, a survey of the breeding population of Ivory Gull Pagophila eburnea was conducted in North and East Greenland. In total, 36 known sites were visited, 16 of these were occupied, nine new colonies were identified and 2028 birds were observed. Compared to the results of a survey in 2009, no change in population status could be detected....

Environmental exposure to bisphenols and benzophenone UV filters has received considerable attention due to the ubiquitous occurrence of these contaminants in the environment and their potential adverse health effects. The occurrence of bisphenols and benzophenone UV filters is well established in human populations, but data is scarce for wildlife,...

Understanding the spatiotemporal patterns of legacy organochlorines (OCs) is often difficult because monitoring practices differ among studies, fragmented study periods, and unaccounted confounding by ecological variables. We therefore reconstructed long-term (1939–2015) and large-scale (West Greenland, Norway, and central Sweden) trends of major l...

This paper presents the results of a number of aircraft- and boat-based surveys for seabird breeding colonies in East and North Greenland carried out in the period 2003 to 2018 and gives the first comprehensive overview of the distribution and size of the seabird breeding colonies in this remote and mainly uninhabited region. Seventeen seabird spec...

This study describes four gray or brown species of Cuphophyllus (Hygrophoraceae, Agaricales), two of them new species, restricted to arctic-alpine and northern boreal zones of North America, and relates them morphologically and phylogenetically using multigene and nuc rDNA internal transcribed spacer ITS1-5.8S-ITS (ITS barcode) analyses to their si...

- The breeding population of ivory gull in the Arctic is declining in parts of its range. Especially dramatic is the situation in Canada, where 70% of the population has been lost since the 1980s. - Satellite tracking of ivory gulls breeding in Canada, Greenland, Svalbard and Russia show that southern Davis Strait and northern Labrador Sea is an in...

We reconstructed the first long-term (1968–2015) spatiotemporal trends of perfluoroalkyl substances (PFAS) using archived body feathers of white-tailed eagles (Haliaeetus albicilla) from the West Greenland (n = 31), Norwegian (n = 66), and Central Swedish Baltic coasts (n = 50). We observed significant temporal trends of perfluorooctane sulfonamide...

The spatiotemporal trends of mercury (Hg) are crucial for the understanding of this ubiquitous and toxic contaminant. However, uncertainties often arise from comparison among studies using different species, analytical and statistical methods. The long-term temporal trends of Hg exposure were reconstructed for a key sentinel species, the white-tail...

Abstract Greenland is the largest island of the world and is situated in the Arctic climate zone. The climate varies from humid oceanic to polar desert, and an ice sheet covers roughly 80% of the island. Sea ice is a significant factor, blocking most coasts in winter and many coasts in summer. The bird fauna is depleted compared to other Arctic are...

Background In the early 1990s offshore oil exploration was reactivated and promoted in Greenland, and background data sampling for Environmental Impact Assessments (EIAs) of the future activities became an important task for NERI. Seabirds were considered particularly important in this context, and information on colonial seabirds were compiled in...

Nomenclatural type definitions are one of the most important concepts in biological nomenclature. Being physical objects that can be re-studied by other researchers, types permanently link taxonomy (an artificial agreement to classify biological diversity) with nomenclature (an artificial agreement to name biological diversity). Two proposals to am...

Atmospheric new particle formation (NPF) and growth significantly influences the indirect aerosol-cloud effect within the polar climate system. In this work, the aerosol population is categorised via cluster analysis of aerosol number size distributions (9-915 nm, 65 bins) taken at Villum Research Station, Station Nord (VRS) in North Greenland duri...

The former Qullissat Coal Mine on the Disko Island in West Greenland operated between 1924 and 1972 and this study by DCE is the first to investigate the environment at Qullissat. The study was considered a screening study with the aim to identify possible significant pollution sources originating from remains at the mine site and mining town. Also...

This report is a strategic environmental impact assessment of activities related primarily to petroleum exploration and to a lesser degree also to exploitation in the waters of the Greenland part of Baffin Bay.

This report describes the results of the second part of the survey of breeding colonial seabirds and marine mammals in Southeast Greenland. The survey covered the coasts between Scoresby Sound and Tasiilaq. Generally, the assembly of breeding seabirds was poor, just as in the area surveyed during the first part of the project in 2014. Again in 2016...

This oil spill sensitivity atlas covers the shoreline and the offshore areas of West Greenland between 75º N and 77º N. The coastal zone is divided into 53 shoreline segments, and the offshore zone into 4 areas. A sensitivity index value is calculated for each segment/area, and each segment/area is subsequently ranked according to four degrees of s...

This document reports field activities in the Disko Bay area in West Green-land. The field studies were part of a background study with the aim of col-lecting information to the preparation of a strategic environmental impact assessment of oil exploration activities on land in the Disko Island and Nuussuaq Peninsula area. Two studies are reported:...

Millions of birds migrate to and from the Arctic each year, yet rapid climate change in the High North could strongly affect where species are able to breed, disrupting migratory connections globally. We modelled the climatically suitable breeding conditions of 24 Arctic specialist shorebirds and projected them to 2070 and to the mid-Holocene clima...

It is well known, that in case of oil spill, seabirds are among the groups of animals most vulnerable. Even small amounts of oil can have lethal effects by destroying the waterproofing of their plumage, leading to loss of insulation and buoyancy. In the Arctic these impacts are intensified. To protect seabirds, a rapid removal of oil is crucial and...

Great Black-backed (Larus marinus), Lesser Black-backed (L. fuscus) and Herring (L. argentatus) gulls have all shown population increases and range expansion in Greenland in recent decades, but in very different ways. Great Black-backed Gulls increased from at least the 1960s from an established, local population. Lesser Black-backed Gulls immigrat...

Novel species of fungi described in the present study include the following from Australia: Neoseptorioides eucalypti gen. & sp. nov. from Eucalyptus radiata leaves, Phytophthora gondwanensis from soil, Diaporthe tulliensis from rotted stem ends of Theobroma cacao fruit, Diaporthe vawdreyi from fruit rot of Psidium guajava, Magnaporthiopsis agrosti...

Novel species of fungi described in the present study include the following from Australia: Neoseptorioides eucalypti gen. & sp. nov. from Eucalyptus radiata leaves, Phytophthora gondwanensis from soil, Diaporthe tulliensis from rotted stem ends of Theobroma cacao fruit, Diaporthe vawdreyi from fruit rot of Psidium guajava, Magnaporthiopsis agrosti...

Ritenbenk/Innaq in Disko Bay is the only remaining Thick-billed Murre colony in central West Greenland. It has declined by 72% since 1980 and now (2012) holds c.1,100 breeding pairs. In 2005–2006 and 2011–2012, a number of studies were carried out in this colony to improve our understanding of the population decline and its causes. Hunting has prev...

The critically endangered Spitsbergen stock of bowhead whale (Balaena mysticetus) seems to be increasing. However, research effort has also been increasing confounding a firm conclusion. A systematic aerial survey for walrus (Odobaenus rosmarus), applying distance sampling methodology in part of the Northeast Water Polynya (NEW), revealed a ‘bycatc...

The entire world population of the Glaucous Gull Larus hyperboreus breeds in the circumpolar Arctic. Some local populations appear to be declining significantly. In this paper, we summarize the current state of knowledge on Glaucous Gull populations and trends. The total Arctic population is estimated at 138 600 to 218 600 breeding pairs (277 200 t...

Key words: Glaucous Gull; Larus hyperboreus; Arctic; population status, population trends; monitoring; conservation concern

The ivory gull Pagophila eburnea is a high-Arctic species threatened by climate change and contaminants. The objective of this study was to assess spatial variation of contaminant levels (organochlorines 'OCs', brominated flame retardants 'BFRs', perfluorinated alkyl substances 'PFASs', and mercury 'Hg') in ivory gulls breeding in different areas a...

This report describes the results of a survey for colonial seabirds and seals along the almost unexplored coasts of Southeast Greenland. In July 2014 the region between Nanortalik and Tasiilaq was covered and it is the plan to cover the region further north to Ittoqqortoormiit in 2015. Very few colonial seabirds were found breeding in 2014, breedin...

Large population declines were reported for the thick-billed murre (Uria lomvia) in Greenland for the period 1930s–1980s, but no national status has been published for the past 20 years. Meanwhile, the murres have gained more protection and several human-induced mortality factors have been markedly reduced. Here, we give an updated status based on...

Seabirds were surveyed in the waters off SE Greenland and in Julianehåb Bight in October 2011. In the waters off SE Greenland only low densities of birds were recorded (Thick-billed Murres Uria lomvia, Little Auks Alle alle and Atlantic Puffins Fratercula arctica). The highest densities (Thick-billed Murres) were found during brief visits to the co...

Molecular phylogenies using 1-4 gene regions and information on ecology, morphology and pigment chemistry were used in a partial revision of the agaric family Hygro- phoraceae. The phylogenetically supported genera we recognize here in the Hygrophoraceae based on these and previous analyses are: Acantholichen, Ampulloclitocybe, Arrhenia, Cantharell...