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  • 1
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    A new species of the genus Conosiphon Becker, 1923 and the first records of this genus for Europe (Diptera, Asilidae) (2023)
    Pensoft Publishers
    In:  ZooKeys vol. 1181, pp. 59-79
    Details
    Publication Date: 2024-04-16
    Description: A new species of Conosiphon Becker, 1923, Conosiphon ianus Álvarez Fidalgo & van den Broek, sp. nov., is described from Spain, representing the first record of this genus for Europe. It is illustrated in high-resolution photographs and the first ecological information is provided, as well as a key to all species tentatively placed in this genus.
    Keywords: Almería ; Asilinae ; endemic ; Iberian Peninsula ; identification key ; Spain
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 2
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    Strategies for good and comprehensive metadata in field-based permafrost research (2024)
    In:  EPIC3
    Details
    Publication Date: 2024-04-15
    Description: Comprehensive metadata are key to making data FAIR. It is therefore essential to collect metadata in an organized and standardized way. For standardized data acquisition, ie. on research vessels, tools are already available and constantly improved. In land-based permafrost expeditions, however, the data and metadata are as diverse as the science questions behind them. We present an overview of this diversity in (meta)data and (meta)data collection and propose strategies to writing good and comprehensive metadata. We encourage to think about metadata right from the start and work on them steadily during the whole process from field work preparation to data collection and from data analysis to final publication. Easy to adapt templates and only choosing the tools that fit the specific data set increases the participation of the whole team.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , NonPeerReviewed
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  • 3
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    Variegated Glacier, Alaska, USA: A Century of Surges (2005)
    In:  EPIC3Journal of Glaciology, 51, 174 p.
    Details
    Publication Date: 2024-04-15
    Description: ABSTRACT. A 1995 surge of Variegated Glacier, Alaska, USA, is discussed in the context of its six 20thcenturypredecessors, especially the previous surge in 1982/83 which was studied in detail. The averagetime between surge initiations is 15 years. The 1995 surge was considerably weaker than itspredecessors, having a single phase or at most a very weak second phase. The 1995 surge confirmsthat there is a seasonal cycle, with surge initiation in winter and termination in the first part of the meltseason, and a correlation between weather and both surge termination date and surge extent. Two daysof record high temperature correlated with the termination of the 1995 surge. The most obvious issue isthe absence of a strong second surge phase (as there was in the 1982/83 surge) culminating in a surgeextent more in line with that of the predecessors. This is considered in the light of a simple criterion forsurge initiation and re-initiation which depends upon the evolving basal shear stress.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 4
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    Alpine Ice Cores and Ground Penetrating Radar: Combined Investigations for Glaciological and Climatic Interpretations of a Cold Alpine Ice Body (2003)
    In:  EPIC3TellusB(5), 55, pp. 1007-1017
    Details
    Publication Date: 2024-04-15
    Description: The accurate interpretation of ice cores as climate archives requires detailed knowledge about the glaciological environment.We investigate the potential of ground penetrating radar (GPR) surveys to obtain information about the internal structure of a cold alpine ice body to improve theinterpretation of two ice cores containing long-term climate information from Colle Gnifetti, Swiss-Italian Alps, retrieved as part of the ALPCLIM project.The GPR profiles connect several drill sites, parallel and perpendicular to the flow line, yielding a 3D picture of the subsurface.Observed internal reflection horizons are of isochronic origin, faciliating the transfer of age-depth relations between the ice cores.A third ice core record is used as independent means to estimate the accuracy of the GPR results in respect to flow modeling, based on glaciological surface data,which was used before for climate analysis of the ice cores.Our results demonstrate that GPR data is a mandatory tool for alpine ice core studies, as they allow to map major transitions in physical-chemical properties,transfer age-depth relations between sites, complement ambiguous peaks in core records for interpretation, and establish a detailed picture of the flow regimesurrounding the climate archive.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 5
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    Direct evidence for continuous radar reflector originating from changes in crystal-orientation fabric (2007)
    In:  EPIC3The Cryosphere, 1, 1-10{http://www.copernicus.org/EGU/tc/tc.html}, 2007, ISSN: 1994-0432
    Details
    Publication Date: 2024-04-15
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 6
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    Thermal acclimation and habitat-dependent differences in temperature robustness of a crustacean motor circuit (2023)
    Frontiers
    In:  EPIC3Frontiers in Cellular Neuroscience, Frontiers, 17, pp. 1263591-1263591, ISSN: 1662-5102
    Details
    Publication Date: 2024-04-15
    Description: Introduction: At the cellular level, acute temperature changes alter ionic conductances, ion channel kinetics, and the activity of entire neuronal circuits. This can result in severe consequences for neural function, animal behavior and survival. In poikilothermic animals, and particularly in aquatic species whose core temperature equals the surrounding water temperature, neurons experience rather rapid and wide-ranging temperature fluctuations. Recent work on pattern generating neural circuits in the crustacean stomatogastric nervous system have demonstrated that neuronal circuits can exhibit an intrinsic robustness to temperature fluctuations. However, considering the increased warming of the oceans and recurring heatwaves due to climate change, the question arises whether this intrinsic robustness can acclimate to changing environmental conditions, and whether it differs between species and ocean habitats. Methods: We address these questions using the pyloric pattern generating circuits in the stomatogastric nervous system of two crab species, Hemigrapsus sanguineus and Carcinus maenas that have seen a worldwide expansion in recent decades. Results and discussion: Consistent with their history as invasive species, we find that pyloric activity showed a broad temperature robustness (〉30°C). Moreover, the temperature-robust range was dependent on habitat temperature in both species. Warm-acclimating animals shifted the critical temperature at which circuit activity breaks down to higher temperatures. This came at the cost of robustness against cold stimuli in H. sanguineus, but not in C. maenas. Comparing the temperature responses of C. maenas from a cold latitude (the North Sea) to those from a warm latitude (Spain) demonstrated that similar shifts in robustness occurred in natural environments. Our results thus demonstrate that neuronal temperature robustness correlates with, and responds to, environmental temperature conditions, potentially preparing animals for changing ecological conditions and shifting habitats.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 7
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    Interactive responses to temperature and salinity in larvae of the Asian brush-clawed crab Hemigrapsus takanoi: relevance for range expansion into the Baltic Sea, in the context of climate change (2024)
    Springer Nature
    In:  EPIC3Biological Invasions, Springer Nature, pp. 1-20, ISSN: 1387-3547
    Details
    Publication Date: 2024-04-15
    Description: We studied the potential of a recently introduced species, the Asian brush-clawed crab (Hemigrapsus takanoi), to expand its distribution range further into the Baltic Sea. H. takanoi has been documented in the southwestern Baltic Sea since 2014. The ability to persist and further expand into the Baltic Proper will depend on their potential to sustain all stages of their complex life cycle, including pelagic larvae, under the Baltic Sea's conditions. Range limits may be established by the tolerance to low salinity, which in addition may be affected by water temperature. A key question is whether local populations at the distribution limit (within the Baltic Sea) show increased tolerance to low salinities and hence promote further expansion. We quantified the combined effects of salinity (10–33 PSU) and temperature (15–24 °C) on larval development in four populations of H. takanoi (two from the Baltic and two from the North Sea). We found substantial differences in larval performance between the populations from the Baltic and North Seas. Larvae from the North Sea populations always showed higher survival and faster development compared with those from the Baltic Sea. Only weak evidence of elevated tolerance towards low salinity was found in the larvae from the Baltic Sea populations. In addition, larvae from the population located near the range limit showed very low survival under all tested salinity-temperature combinations and no evidence of increased tolerance to low salinity. There was no apparent genetic differentiation among the studied populations in the mitochondrial cytochrome c oxidase subunit one gene (COI) implying high connectivity among the populations. In conclusion, the weak evidence of low salinity tolerance in Baltic Sea populations, and poor larval performance for the population located near the range limit, coupled with limited genetic differentiation suggest that subsidies are needed for populations to persist near the range limit. Alternatively, ontogenetic migrations would be required to sustain those populations. Monitoring efforts are needed to elucidate the underlaying mechanisms and document potential future range expansions.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 8
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    Exploring Convolutional Neural Networks for the Thermal Image Classification of Volcanic Activity (2024)
    MDPI
    Details
    Publication Date: 2024-04-15
    Description: This paper addresses the classification of images depicting the eruptive activity of Mount Etna, captured by a network of ground-based thermal cameras. The proposed approach utilizes Convolutional Neural Networks (CNNs), focusing on pretrained models. Eight popular pretrained neural networks underwent systematic evaluation, revealing their effectiveness in addressing the classification problem. The experimental results demonstrated that, following a retraining phase with a limited dataset, specific networks such as VGG-16 and AlexNet, achieved an impressive total accuracy of approximately 90%. Notably, VGG-16 and AlexNet emerged as practical choices, exhibiting individual class accuracies exceeding 90%. The case study emphasized the pivotal role of transfer learning, as attempts to solve the classification problem without pretrained networks resulted in unsatisfactory outcomes.
    Description: Supported by Italian Research Center on High Performance Computing Big Data and Quantum Computing (ICSC), project funded by European Union—NextGenerationEU—and National Recovery and Resilience Plan (NRRP)—Mission 4 Component 2 within the activities of Spoke 3 (Astrophysics and Cosmos Observations). Sonia Calvari also acknowledges the financial support of the Project FIRST ForecastIng eRuptive activity at Stromboli volcano (Delibera n. 144/2020; Scientific Responsibility: S.C.) Vulcani 2019.
    Description: Published
    Description: 124-137
    Description: OSV3: Sviluppo di nuovi sistemi osservazionali e di analisi ad alta sensibilità
    Description: JCR Journal
    Keywords: Etna Volcano ; Lava Fountains ; classification of events ; 04.08. Volcanology
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 9
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    Hygrophorus sect. Olivaceoumbrini: new boundaries, extended biogeography and unexpected diversity unravelled by transatlantic studies (2021)
    Naturalis Biodiversity Center
    In:  Persoonia - Molecular Phylogeny and Evolution of Fungi vol. 46, pp. 272-312
    Details
    Publication Date: 2024-04-15
    Description: As currently delineated, Hygrophorus sect. Olivaceoumbrini is a polyphyletic assembly within subg. Colorati, encompassing glutinous and pigmented taxa. According to available literature, between a dozen and twenty species may belong in the section, mostly represented in continental and boreal forests of Europe and North America. However, the limited phylogenetic and biogeographic coverage of the genus does not presently allow for a reliable assessment of its taxonomic boundaries, nor does it provide a complete picture of species diversity within sect. Olivaceoumbrini. In an ongoing effort to confer an evolutionary backbone to Hygrophorus systematics, we assembled and analysed a dataset comprising 268 intercontinental sequences, including holotypes of 7 taxa previously not positioned phylogenetically, and enriched with collections from largely unexplored Mediterranean and Anatolian ecosystems. Overall, 30 clades are identified within 5 distinct lineages, including 11 species putatively new to science. Seven of these are formally described here as H. agathosmoides, H. albofloccosus, H. canadensis, H. limosus, H. marcocontui, H. pinophilus and H. pustulatoides spp. nov. This enriched coverage of section Olivaceoumbrini s.lat. calls for a re-evaluation of its natural boundaries into a core monophyletic clade, including H. olivaceoalbus and five closely related lookalikes, as well as the assignment of the section rank to the four remaining lineages: sect. Fuscocinerei sect. nov., sect. Limacini sect. nov., sect. Nudolidi sect. nov. and sect. Tephroleuci, respectively. We also stabilize the usage of six historical names, H. glutinifer, H. hyacinthinus, H. mesotephrus, H. olivaceoalbus, H. pustulatus and H. tephroleucus, through designation of two neotypes, three lectotypes and four epitypes.
    Keywords: Ecology ; Evolution ; Behavior and Systematics ; Hygrophorus latitabundus ; Hygrophorus olivaceoalbus ; Hygrophorus persoonii ; phylogeny ; taxonomy ; waxcap
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 10
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    Ressourcenkompetenz entwickeln : Ressourcenschonung und Ressourceneffizienz in der Hochschule verankern (2019)
    Berlin : Springer
    Details
    Publication Date: 2024-04-15
    Keywords: ddc:300
    Repository Name: Wuppertal Institut für Klima, Umwelt, Energie
    Language: German
    Type: bookpart , doc-type:bookPart
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