Icelandic Tourism Research Centre

Growing cruise tourism numbers in the Arctic have prompted concerns about a lack of local capacity to handle this form of development. To address these concerns, this paper discusses how Arctic tourism destinations manage cruise tourism. The study involved a cross-case analysis of five Arctic cruise destination communities. The empirical investigation identifies five practices — pricing, innovation, investment, regulation, and networking—that can be used to address local cruise challenges and secure local control over the number of incoming cruise tourists. The study concludes that sustainable Arctic cruise destinations rely on regional and national regulations, locally developed practices, and local governance arrangements.

Isousnic acid (isoUA) has been detected in a few usnic acid (UA)-producing lichens with chemotaxonomic values. IsoUA was first isolated from a specimen belonging to Cladonia arbuscula s.l. (referred to as C. mitis in the publication). However, the isolation and detection of isoUA in this Cladonia species have not been reproduced and confirmed with clear evidence. This study focused on C. arbuscula s.l. collected in Iceland and aimed to (1) identify the lichen specimen using DNA barcoding and (2) investigate whether isoUA is produced using a series of chromatographic methods. The fungal nuclear ribosomal internal transcribed spacer (nrITS) barcode was sequenced, and the specimen was identified as C. arbuscula, following recent circumscription recommendations. Routine metabolite profiling did not detect isoUA, and it could only be identified after vigorous chromatographic purification and concentration steps using flash chromatography and preparative high-performance liquid chromatography. IsoUA was found in trace quantities (~24 µg/g dry weight), which likely explains its absence in routine metabolite profiling. A rapid ultra-high-performance liquid chromatography (UHPLC) method using a pentafluorophenyl column was developed to separate UA and isoUA. Our study highlights the importance of an integrative approach combining DNA barcoding and detailed chromatographic analyses for lichen chemistry research.

Marine biodiversity faces challenges due to climate change, pollution, and human activities. Conservation efforts are often constrained by limited resources and public disengagement. This study evaluates the potential benefits of incorporating environmental DNA (eDNA) sampling and citizen science into whale-watching tours to raise environmental awareness and promote marine conservation. A Likert-scale questionnaire evaluating attitudes, knowledge, and willingness to contribute to conservation through financial support, behavioral changes, and volunteering was administered to 224 participants across the Pelagos Sanctuary (Italy), the Azores (Portugal), and Skjálfandi Bay (Iceland). Environmental awareness, interest in environmental DNA (eDNA), and higher education levels were identified as significant predictors of willingness to pay (WTP). Conversely, higher ticket prices negatively impacted financial commitment. The majority of respondents reported an increased awareness of marine biodiversity and eDNA, along with a strong sense of personal responsibility toward marine protection. The study outlined various participant profiles, indicating how age, education, and ecotourism experience influence conservation attitudes. Specifically, younger individuals who are highly educated and have prior whale-watching experience were more inclined to provide financial support and engage in citizen science activities. These findings demonstrate that integrating citizen science-based activities and environmental DNA (eDNA) sampling, into whale-watching tours is an effective way to foster meaningful pro-environmental engagement. This model presents a scalable and cost-effective approach to enhancing public participation in marine conservation and biodiversity monitoring, with potential applications extending to broader marine governance and ecotourism settings.

Marine mammals serve as indicator species for environmental and human health. However, they are increasingly exposed to pressure from human activities and climate change. The white-beaked dolphin (Lagenorhynchus albirostris) (WBD) is among the species negatively affected by these conditions. To support conservation and management efforts, a deeper understanding of their behavior and movement patterns is essential. One approach is drone-based monitoring combined with artificial intelligence (AI), allowing efficient data collection and large-scale analysis. This study aims to: (1) investigate the use of drone imagery and AI to monitor and analyze marine mammal behavior, and (2) test the application of machine learning (ML) to identify behavioral patterns. Data were collected in Skjálfandi Bay, Iceland, between 2021 and 2023. Three behavioral types were identified: Traveling, Milling, and Respiration. The AI_RGB model showed high performance on Traveling behavior (precision 92.3%, recall 96.9%), while the AI_gray model achieved higher precision (97.3%) but much lower recall (9.5%). The model struggled to classify Respiration accurately (recall 1%, F1-score 2%). A key challenge was misidentification of WBDs due to visual overlap with birds, waves, and reflections, resulting in high false positive rates. Multimodal AI systems may help reduce such errors in future research.

This paper investigates the mechanisms of ocean acidification and its effects on marine biota. Ocean acidification is where seawater absorbs too much carbon dioxide from the atmosphere, increasing acidity, measured by pH value. Its causes include human activities (fossil fuel burning, deforestation), climate activities (ocean warming, sea ice melting), and natural phenomena (volcanic eruptions, etc.). Historical PETM events and the end Permian mass extinction event indicate ocean acidification significantly impacts biodiversity. Ocean acidification may induce behavioral and physiological alterations in non-calcifying marine organisms, including modifications to the swimming patterns of clownfish and the foraging behaviors of planktonic fauna. For calcified microorganisms, it can hinder coral bone formation and shellfish shell formation, reducing juvenile survival rates. Overall, ocean acidification disrupts the marine food web, reduces biodiversity, damages ecosystem stability and adaptability, and requires in-depth exploration of its mechanisms and the development of response strategies.

ABSTRACTWildlife populations globally have experienced widespread historical declines due to anthropogenic and environmental impacts, yet for some species, contemporary management and conservation programmes have enabled recent recovery. The impacts of decline and recovery on genomic diversity and, vice versa, the genetic factors that contribute to conservation success or failure are rich areas for inquiry, with implications for shaping how we manage species into the future. To comprehensively characterise these processes in natural systems requires range‐wide sampling and international collaboration, particularly for species with wide dispersal capabilities, broad geographic distributions, and complex regional metapopulation dynamics. Here, we present the first range‐ and genome‐wide population genomic analysis of grey seals based on 3812 nuclear SNPs genotyped in 188 samples from 17 localities. Our analyses support the existence of three main grey seal populations centred in the NW Atlantic, NE Atlantic and Baltic Sea, and point to the existence of previously unrecognised substructure within the NE Atlantic. We detected remarkably low levels of genetic diversity in the NW Atlantic population, and demographic analyses revealed a turbulent history of NE Atlantic and Baltic Sea grey seals, with bottlenecks in the Middle Ages and the 20th century due to hunting and habitat alterations. We found some localities deviated from isolation by distance patterns, likely reflecting wide‐scale metapopulation dynamics associated with recolonisation and recovery in regions where they were historically extirpated. We identify at least six grey seal genetic populations and reveal marked genetic effects of past declines and recent recovery across the species' range.

ABSTRACT The volume of cruise ship arrivals is a critical factor in the debate over the sustainability of local cruise destinations. However, cruise operators primarily determine itineraries, leaving local destinations with limited control over the frequency and timing of arrivals. This study draws on the concept of community-based tourism from a new institutional economic perspective to explore the establishment of institutions that destinations can implement to influence the volume and timing of cruise arrivals, promoting more sustainable cruise practices. Our study focuses on four Nordic destinations: Gotland in Sweden, Ísafjörður in Iceland, and Lofoten and Svalbard in Norway. Despite the challenges and opportunities of managing cruise traffic, each destination has implemented institutions to manage and control the influx of cruise ships. Our findings reveal that these destinations are employing a range of institutions, including regulations, guidelines, and innovative measures, to influence cruise traffic. This demonstrates how these control strategies can enhance the development of community-based tourism.

Mercury (Hg) is a heterogeneously distributed toxicant affecting wildlife and human health. Yet, the spatial distribution of Hg remains poorly documented, especially in food webs, even though this knowledge is essential to assess large-scale risk of toxicity for the biota and human populations. Here, we used seabirds to assess, at an unprecedented population and geographic magnitude and high resolution, the spatial distribution of Hg in North Atlantic marine food webs. To this end, we combined tracking data of 837 seabirds from seven different species and 27 breeding colonies located across the North Atlantic and Atlantic Arctic together with Hg analyses in feathers representing individual seabird contamination based on their winter distribution. Our results highlight an east-west gradient in Hg concentrations with hot spots around southern Greenland and the east coast of Canada and a cold spot in the Barents and Kara Seas. We hypothesize that those gradients are influenced by eastern (Norwegian Atlantic Current and West Spitsbergen Current) and western (East Greenland Current) oceanic currents and melting of the Greenland Ice Sheet. By tracking spatial Hg contamination in marine ecosystems and through the identification of areas at risk of Hg toxicity, this study provides essential knowledge for international decisions about where the regulation of pollutants should be prioritized.

Since 2016, A(H5Nx) high pathogenic avian influenza (HPAI) virus of clade 2.3.4.4b has become one of the most serious global threats not only to wild and domestic birds, but also to public health. In recent years, important changes in the ecology, epidemiology, and evolution of this virus have been reported, with an unprecedented global diffusion and variety of affected birds and mammalian species. After the two consecutive and devastating epidemic waves in Europe in 2020-2021 and 2021-2022, with the second one recognized as one of the largest epidemics recorded so far, this clade has begun to circulate endemically in European wild bird populations. This study used the complete genomes of 1,956 European HPAI A(H5Nx) viruses to investigate the virus evolution during this varying epidemiological outline. We investigated the spatiotemporal patterns of A(H5Nx) virus diffusion to/from and within Europe during the 2020-2021 and 2021-2022 epidemic waves, providing evidence of ongoing changes in transmission dynamics and disease epidemiology. We demonstrated the high genetic diversity of the circulating viruses, which have undergone frequent reassortment events, providing for the first time a complete overview and a proposed nomenclature of the multiple genotypes circulating in Europe in 2020-2022. We described the emergence of a new genotype with gull adapted genes, which offered the virus the opportunity to occupy new ecological niches, driving the disease endemicity in the European wild bird population. The high propensity of the virus for reassortment, its jumps to a progressively wider number of host species, including mammals, and the rapid acquisition of adaptive mutations make the trend of virus evolution and spread difficult to predict in this unfailing evolving scenario.