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  • 1
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    Optimizing statistical classification accuracy of satellite remotely sensed imagery for supporting fast flood hydrological analysis (2012)
    De Gruyter Open
    Details
    Publication Date: 2012-04-14
    Description:    The aim of this study is to improve classification results of multispectral satellite imagery for supporting flood risk assessment analysis in a catchment area in Cyprus. For this purpose, precipitation and ground spectroradiometric data have been collected and analyzed with innovative statistical analysis methods. Samples of regolith and construction material were in situ collected and examined in the spectroscopy laboratory for their spectral response under consecutive different conditions of humidity. Moreover, reflectance values were extracted from the same targets using Landsat TM/ETM+ images, for drought and humid time periods, using archived meteorological data. The comparison of the results showed that spectral responses for all the specimens were less correlated in cases of substantial humidity, both in laboratory and satellite images. These results were validated with the application of different classification algorithms (ISODATA, maximum likelihood, object based, maximum entropy) to satellite images acquired during time period when precipitation phenomena had been recorded. Content Type Journal Article Pages 1-26 DOI 10.2478/s11600-012-0025-9 Authors Dimitrios D. Alexakis, Department of Civil Engineering and Geomatics, Remote Sensing Lab., Faculty of Engineering and Technology, Cyprus University of Technology, Limassol, Cyprus Athos Agapiou, Department of Civil Engineering and Geomatics, Remote Sensing Lab., Faculty of Engineering and Technology, Cyprus University of Technology, Limassol, Cyprus Diofantos G. Hadjimitsis, Department of Civil Engineering and Geomatics, Remote Sensing Lab., Faculty of Engineering and Technology, Cyprus University of Technology, Limassol, Cyprus Adrianos Retalis, National Observatory of Athens, Institute for Environmental Research and Sustainable Development, Athens, Greece Journal Acta Geophysica Online ISSN 1895-7455 Print ISSN 1895-6572
    Print ISSN: 1895-6572
    Electronic ISSN: 1895-7455
    Topics: Geosciences
    Published by De Gruyter Open
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  • 2
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    Increasing heterogeneity of sensitive assemblages as a consequence of human impact in submarine caves (2012)
    Springer
    Details
    Publication Date: 2012-03-01
    Description:    Submarine caves are considered as a top priority for conservation, but the effects of common pressures are poorly known for these habitats. Here, we examined the effect of recreational human visitation on a selection of submarine caves in a Mediterranean Marine Protected Area (40°35′40″N; 8°11′39″E) where diving activities are regulated. Sampling was conducted in visited and not visited caves to assess whether diving activities have a significant effect on cave habitats, what are the components of biodiversity most affected by this disturbance, and its potential effects on spatial heterogeneity of benthic assemblages. Results clearly showed that human visitation could significantly affect spatial patterns of benthic assemblages. Organisms with erect growth forms were significantly more abundant and homogeneously distributed where diving activities are forbidden. An increase in the small-scale heterogeneity of assemblages and a decrease in their three-dimensional structure could be the ultimate consequences of human visitation. The interaction between specific stressors and the patterns of distribution of species and assemblages can drive their spatial heterogeneity also in unique habitats like marine caves, representing an early warning for the development of appropriate management measures. Content Type Journal Article Category Original Paper Pages 1-10 DOI 10.1007/s00227-012-1895-8 Authors Giuseppe Guarnieri, Laboratorio Zoologia e Biologia Marina, Dipartimento Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, CoNISMa, Campus Ecotekne, 73100 Lecce, Italy Antonio Terlizzi, Laboratorio Zoologia e Biologia Marina, Dipartimento Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, CoNISMa, Campus Ecotekne, 73100 Lecce, Italy Stanislao Bevilacqua, Laboratorio Zoologia e Biologia Marina, Dipartimento Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, CoNISMa, Campus Ecotekne, 73100 Lecce, Italy Simonetta Fraschetti, Laboratorio Zoologia e Biologia Marina, Dipartimento Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, CoNISMa, Campus Ecotekne, 73100 Lecce, Italy Journal Marine Biology Online ISSN 1432-1793 Print ISSN 0025-3162
    Print ISSN: 0025-3162
    Electronic ISSN: 1432-1793
    Topics: Biology
    Published by Springer
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  • 3
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    Kartographische Arbeiten und deutsche Namengebung in Neuschwabenland, Antarktis (1986)
    Verlag des Instituts für Angewandt Geodäsie, Frankfurt am Main
    In:  EPIC3Mitteilungen des Institus für Angewandt Geodäsie, Verlag des Instituts für Angewandt Geodäsie, Frankfurt am Main, 24(1+2), pp. 1-264/31, ISSN: 0071-9196
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    Publication Date: 2018-09-18
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , notRev
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  • 4
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    Depositional setting, provenance, and tectonic-volcanic setting of Eocene–Recent deep-sea sediments of the oceanic Izu–Bonin forearc, northwest Pacific (IODP Expedition 352) (2018)
    Taylor & Francis
    In:  International Geology Review, 60 (15). pp. 1816-1854.
    Details
    Publication Date: 2021-02-08
    Description: New biostratigraphical, geochemical, and magnetic evidence is synthesized with IODP Expedition 352 shipboard results to understand the sedimentary and tectono-magmatic development of the Izu–Bonin outer forearc region. The oceanic basement of the Izu–Bonin forearc was created by supra-subduction zone seafloor spreading during early Eocene (c. 50–51 Ma). Seafloor spreading created an irregular seafloor topography on which talus locally accumulated. Oxide-rich sediments accumulated above the igneous basement by mixing of hydrothermal and pelagic sediment. Basaltic volcanism was followed by a hiatus of up to 15 million years as a result of topographic isolation or sediment bypassing. Variably tuffaceous deep-sea sediments were deposited during Oligocene to early Miocene and from mid-Miocene to Pleistocene. The sediments ponded into extensional fault-controlled basins, whereas condensed sediments accumulated on a local basement high. Oligocene nannofossil ooze accumulated together with felsic tuff that was mainly derived from the nearby Izu–Bonin arc. Accumulation of radiolarian-bearing mud, silty clay, and hydrogenous metal oxides beneath the carbonate compensation depth (CCD) characterized the early Miocene, followed by middle Miocene–Pleistocene increased carbonate preservation, deepened CCD and tephra input from both the oceanic Izu–Bonin arc and the continental margin Honshu arc. The Izu–Bonin forearc basement formed in a near-equatorial setting, with late Mesozoic arc remnants to the west. Subduction-initiation magmatism is likely to have taken place near a pre-existing continent–oceanic crust boundary. The Izu–Bonin arc migrated northward and clockwise to collide with Honshu by early Miocene, strongly influencing regional sedimentation.
    Type: Article , PeerReviewed
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  • 5
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    Sonderforschungsbereich 313, Veränderungen der Umwelt - Der Nördliche Nordatlantik, Christian-Albrechts-Universität: Berichtsband 91-92-93, Band 2: Publikationen und Manuskripte (1993)
    Universität Kiel, SFB 313
    In:  Berichte aus dem Sonderforschungsbereich 313, Veränderungen der Umwelt - Der Nördliche Nordatlantik, 91 -92-93, Band 2 . Universität Kiel, SFB 313, Kiel, Germany, 260 pp.
    Details
    Publication Date: 2019-04-30
    Type: Report , NonPeerReviewed
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  • 6
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    North Atlantic Cruise No. 50, 7 May - 12 August 2001 [M50] (2002)
    Leitstelle Meteor, Institut für Meereskunde Hamburg
    In:  Meteor-Berichte, 02-2 . Leitstelle Meteor, Institut für Meereskunde Hamburg, Hamburg, Germany, 133 pp.
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    Publication Date: 2020-04-02
    Type: Report , NonPeerReviewed
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  • 7
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    IUGG Yearbook 2023 (2023)
    IUGG Secretariat, GFZ German Research Centre for Geosciences
    In:  IUGG Publications
    Details
    Publication Date: 2023-03-02
    Description: The IUGG Yearbook is a reference document of IUGG members, administrative officers, and Association and Union Commission officers that is updated annually and distributed free of charge. Each issue endeavors to update the contact information for hundreds of persons who are actively participating in IUGG scientific activities. Information is complied throughout the year until end December. The Yearbooks are published and posted at the IUGG webpage at the beginning of the year. The Yearbooks are printed together with the Annual Reports for the preceding year in May and mailed to National Committee for Geodesy and Geophysics, Adhering Bodies, IUGG partners, and major libraries.
    Language: French , English
    Type: info:eu-repo/semantics/report
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  • 8
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    TOPOGULF : a joint programme initiated by IFREMER, Brest (France), IFM, Kiel (W. Germany); data report: Vol. 1: CTD, O2, and nutrients (1986)
    In:  Berichte aus dem Institut für Meereskunde an der Christian-Albrechts-Universität Kiel, 154 . UNSPECIFIED, 183 pp.
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    Publication Date: 2021-01-20
    Type: Report , NonPeerReviewed
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  • 9
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    Mollusc species response to drivers in space and time: Rise and demise of the unique Pontocaspian fauna (2020)
    Details
    Publication Date: 2024-01-12
    Description: The evolution of the Pontocaspian lakes and seas (Caspian Sea, Black Sea, Aral Sea) is characterised by major changes in water levels, which developed into a pulsating system of connected and isolated basins. During the late Quaternary (Late Pleistocene and Holocene), these basins have hosted a unique endemic biodiversity that experienced species turnover events. There are indications that the Pontocaspian species diversity is now in demise because of anthropogenic modifications of the ecosystem, such as habitat alteration, poaching, pollution and invasive species. Little data is available on faunal changes and resilience of Pontocaspian species to help discerning the effect of natural drivers and anthropogenic drivers on the endemic fauna, which is of direct relevance for conservation strategies. \nThis thesis aims to characterize species richness and abundance of fossil faunas to establish a baseline for comparison with the changing biodiversity of today. Mollusc species are used as the study group as they easily fossilize and are abundant in the geological record. They inform us about the composition of communities and how they change, and enable us to reconstruct environments (\xe2\x80\x98habitats\xe2\x80\x99). This is necessary in order to compare biodiversity through different time intervals and establish whether comparable habitats existed as those of today. A baseline of Pontocaspian mollusc faunas was achieved by analysing snapshots from the Caspian Sea basin and the Black Sea basin. Caspian mollusc assemblages are analysed from late Pleistocene (corresponding to the late Khazarian, Hyrcanian, early Khvalynian and late Khvalynian regional stages) and pre-20th century Holocene (Novocaspian) assemblages. Black Sea assemblages from the late Neoeuxinian and late Holocene are described. They are both compared with modern day assemblages. \nThis study shows clear indications of a Pontocaspian mollusc diversity crisis. Overall, in the 20th\xe2\x80\x9321st century, Pontocaspian molluscs have experienced a severe decline in species richness and abundance: a strong turnover towards invasive species in the Caspian basin, a strong habitat decline in parts of the Black Sea basin and a total obliteration in the Aral basin. The late Quaternary mollusc fauna snapshots demonstrate that endemic species dominated the Caspian communities with minor contributions of native species until the late Holocene. The Pontocaspian mollusc species richness in the Caspian Sea basin is higher than in the Pontocaspian habitats of the Black Sea basin, or the Aral Sea basin. Throughout the Late Quaternary, the strong natural fluctuations of Caspian Sea level affected shallow water bivalve species of the genus Didacna, but barely changed the overall composition of the mollusc faunas. Late Quaternary mollusc fauna snapshots of the Black Sea basin show very little change in the Pontocaspian species community since humans impacted the habitats. However, the Black Sea Pontocaspian mollusc communities are currently under severe threat of habitat deterioration and destruction. \nThis research indicates that the Caspian Sea could act as a source for Pontocaspian biota, hence conservation efforts are imperative there. The deeper parts (〉50 m water depth) possibly present a (partial) refuge, and urgent research is required to assess these habitats and their faunas. Future research should focus on improving the taxonomic framework to elucidate the identity of some Pontocaspian cryptic and sister species. We need more distribution and ecological data of current Pontocaspian species and more detailed biodiversity time series coupled with detailed environmental proxies to assess the nature of the Pontocaspian biodiversity crisis more comprehensively and plan conservation actions accordingly.
    Keywords: Pontocaspian ; Biodiversity ; Quaternary ; Mollusca ; Marie Sk\xc5\x82odowska-Curie Actions ; Action: H2020-MSCA-ITN-2014 ; PRIDE ; Grant agreement no: 642973
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/doctoralThesis
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