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  • Lake Shores
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  • 1
    Language: German
    In: Umweltwissenschaften und Schadstoff-Forschung, 2004, Vol.16(2), pp.113-114
    Description: Die Beitragsserie ‘Seeufer, ein vergessenes Ökoton’, wird ergänzt durch einen persönlichen Bericht von der ersten Seeuferkonferenz, veranstaltet in Konstanz (Beitrag 4). Von den fünf während der Konferenz behandelten Themenblöcken werden die drei ersten ausführlicher behandelt, da diese sich weitestgehend mit der Modellierung und mathematisch-theoretischen Bearbeitung des Seeufers befassen. Im ersten Themenblock wurden vornehmlich die hydrophysikalischen Prozesse behandelt, im zweiten stand die phänomenologische Erfassung von Seeuferbeeinträchtigungen, im dritten die Bewertung des ökologischen Zustands im Vordergrund. Gegenstand von Themenblock 4 waren Möglichkeiten der Uferrenaturierung bzw. des Uferschutzes. Themenblock 5 beschäftigte sich mit der nachhaltigen Entwicklung der Seeufer und zeigte neue Möglichkeiten der Nutzung und Bewertung auf. This report of an international conference about the problems around lakeshores, their evaluation and the possibilities to improve the situation for lake shores, continues the series ‘Lake shores, a forgotten ecotone’ as article 4. Five main topics were discussed: (1) applied ecology of lakeshores, (2) human impact, (3) ecological assessment, (4) protection and restoration, (5) sustainable development and use of lake shores.
    Keywords: Assessment ; hydrophysical processes ; lake shores ; sustainability
    ISSN: 0934-3504
    E-ISSN: 1865-5084
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  • 2
    Language: English
    In: Hydrobiologia, 2016, Vol.767(1), pp.207-220
    Description: Lake shores are characterised by a high natural variability, which is increasingly threatened by a multitude of anthropogenic disturbances including morphological alterations to the littoral zone. The European Water Framework Directive (EU WFD) calls for the assessment of lake ecological status by monitoring biological quality elements including benthic macroinvertebrates. To identify cost- and time-efficient sampling strategies for routine lake monitoring, we sampled littoral invertebrates in 32 lakes located in different geographical regions in Europe. We compared the efficiency of two sampling methodologies, defined as habitat-specific and pooled composite sampling protocols. Benthic samples were collected from unmodified and morphologically altered shorelines. Variability within macroinvertebrate communities did not differ significantly between sampling protocols across alteration types, lake types and geographical regions. Community composition showed no significant differences between field composite samples and artificially generated composite samples, and correlation coefficients between macroinvertebrate metrics calculated with both methods and a predefined morphological stressor index were similar. We conclude that proportional composite sampling represents a time- and cost-efficient method for routine lake monitoring as requested under the EU WFD, and may be applied across various European geographical regions.
    Keywords: Morphological alteration ; Macroinvertebrates ; Lake monitoring ; Method comparison ; Littoral zone ; EU Water Framework Directive
    ISSN: 0018-8158
    E-ISSN: 1573-5117
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  • 3
    In: Fundamental and Applied Limnology / Archiv für Hydrobiologie, June 2015, Vol.186(4), pp.311-321
    Description: Lakeshores are subjected to ongoing increase of human utilization and degradation. The development of effective assessment tools based on littoral macroinvertebrates is currently limited by the lack of knowledge as to whether effects of lakeshore modification on macroinvertebrate communities are mediated by water depth and season. We quantified the macroinvertebrate community of a large lowland lake (Lake Scharmuetzelsee, Germany) at natural shores and shores modified by marinas and beaches in three depth zones between April and November 2011. The effect of lakeshore modification on macroinvertebrate diversity and community composition was most pronounced in the upper littoral and less important in the middle littoral and profundal zone. Conversely, seasonal effects on upper littoral macroinvertebrate diversity and composition were less important than shore type in comparison with the middle littoral and profundal zone. We recommend that future assessment methods based on macroinvertebrates should focus on the upper littoral zone, where effects of lakeshore modifications are strongest and communities are most susceptible to anthropogenic impairments. Our results also suggest that a single seasonal sampling is sufficient to capture the compositional differences of macroinvertebrate communities associated with human lakeshore modifications.
    Keywords: Profundal ; Biodiversity ; Shoreline Development ; Spatial Heterogeneity ; Beach ; Marina
    ISSN: 1863-9135
    E-ISSN: 23637110
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  • 4
    In: Fundamental and Applied Limnology / Archiv für Hydrobiologie, June 2015, Vol.186(4), pp.353-369
    Description: Hydromorphological alterations of lake shores constitute an important pressure on Central European lakes. The local ecological effects of such alterations can be assessed by multimetric assessment methods based on eulittoral macroinvertebrate communities. However, such tools so far only enable a local assessment even if the European Union Water Framework (EU WFD) requires an assessment at whole-lake level. Since due to time and financial constraints it is not feasible to perform small-scale macroinvertebrate assessments over the whole length of the lake shore, the site-specific ecological assessment result needs to be extrapolated. In this study, we analyse the use of a physical habitat survey method including both ground surveys and aerial photo analysis (HML = HydroMorphology of Lakes survey protocol) to enable an extrapolation from local to whole lake ecological assessment. For that purpose, we correlated individual macroinvertebrate metrics as well as results of a multimetric macroinvertebrate-based index (I) with the areal cover of surrounding natural shore elements, (II) with the hydromorphological impact within an encircling rectangle around the macroinvertebrate sampling site, and (III) with the hydromorphological impact in the adjacent epi-, eu- and sublittoral subsegments. Building up on this, an ecological whole lake assessment was achieved by averaging multimetric index scores calculated for each subsegement based on a regression equation between the multimetric index and the hydromorphological impacts in the three subsegments. This whole lake assessment approach can most likely be applied to geographical regions outside Central Europe and lake types not analysed here (fluvial lowland lakes, prealpine/alpine lakes), but more studies are necessary to verify this. Eventually, the extrapolation presented here may complement existing lake assessments under the EU WFD solely focusing on water quality so far.
    Keywords: Physical Habitat Survey ; Eu Water Framework Directive ; Hydromorphology Of Lakes Protocol (Hml) ; Hydromorphology ; Whole Lake Assessment ; Lakes ; Macroinvertebrates
    ISSN: 1863-9135
    E-ISSN: 23637110
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  • 5
    Language: German
    In: Umweltwissenschaften und Schadstoff-Forschung, 2004, Vol.16(1), pp.48-56
    Description: Die EU-Wasserrahmenrichtlinie (EU-WRRL) fordert eine holistische Herangehensweise in Maßnahmen zur Gewässergüteverbesserung Mit der Forderung nach ’mehr Ökologie’ ist die Anwendung von Biodiversitätsindices naheliegend. Will man Biodiversitätsindices verwenden, um Vergleiche durchzuführen, so stellt sich die Frage, ob ein Ranking anhand eines ’Biodiversitätindex unabhängig von der speziellen Wahl des Index ist. Leider ist dies nicht der Fall. Konzepte zur Auflösung des Dilemmas werden aufgezeigt und eine graphische Technik eingesetzt, die bisher nur in der Quantenmechanik, statistischen Mechanik und in der Theoretischen Chemie angewender wurde: Die Technik der YOUNG-Diagramme. Within the context of the EU Water Framework Directive (EUWFD), there is a demand for a holistic quality improvement of aquatic systems. Therefore, it is obvious that biodiversity is one of the quality components and hence has to be considered in detail. The ranking of habitats, based on biodiversity indices, depends on the specific measurement selected. It is postulated that a ranking of habitats by means of a biodiversity index may be ambiguous. Concepts to resolve this dilemma are demonstrated, and a graphical formalism is introduced which up to now has only been used in quantum mechanics, statistical mechanics, and theoretical chemistry: The YOUNG-diagram technique.
    Keywords: Areas of protection ; biodiversity ; ecotones ; EU Water Frame work Directive (EU-WFD) ; Lake Constance ; lake shores ; order theory ; YOUNG-Diagrams
    ISSN: 0934-3504
    E-ISSN: 1865-5084
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