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Berlin Brandenburg

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  • 1
    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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  • 2
    Language: English
    In: Hydrobiologia, 2009, Vol.636(1), pp.421-438
    Description: Turloughs, ephemeral water bodies associated with karstified limestone, are an important habitat found in the West of Ireland. They are a priority habitat under the European Habitats Directive (92/43/EEC) and are groundwater-dependent habitats under the European Water Framework Directive (2000/60/EC; WFD). Sampling to meet the objectives of either Directive requires discrimination of inherent natural variation from anthropogenically induced disturbances and accounting for both spatial and seasonal patterns of biotic distribution. This study reports within- (submerged grassland) and between-habitat (submerged and emergent grassland) variability of macroinvertebrate communities in six turloughs. Two different habitat types were sampled from two turloughs in April 2007, and further assessment of spatial pattern in commonly found submerged grassland habitat was determined from four additional turloughs in spring 2008. While cluster analysis and non-metric multidimensional scaling identified differences in macroinvertebrate community structures between habitats in one out of two turloughs, congruence of invertebrate communities was, nevertheless, greater within than among turloughs. Within-habitat variability of macroinvertebrate communities across sampling locations of submerged grassland habitat was sufficiently low so that samples collected at any location of a turlough can provide a reliable metric of the macroinvertebrate community of a turlough as a whole. A standardized submerged grassland sampling approach for routine turlough sampling is recommended as a pressure response method to fulfil the requirements of the WFD. For a comprehensive conservation assessment, however, as demanded under the EC Habitats Directive, we suggest a multi-habitat sampling approach to obtain a thorough assessment of turlough macroinvertebrate biodiversity.
    Keywords: Turloughs ; Ephemeral lakes ; Macroinvertebrates ; Habitat variability ; Water Framework Directive ; Habitats Directive
    ISSN: 0018-8158
    E-ISSN: 1573-5117
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  • 3
    Language: English
    In: Hydrobiologia, 2012, Vol.696(1), pp.47-62
    Description: The temporal transition of species dominance following disturbances is strongly influenced by taxon life histories. In temporary water bodies, seasonal progression can be rapid. The community response of aquatic littoral invertebrate communities to disturbance was measured across four temporary water bodies (turloughs) representing a hydroperiod gradient in the karst landscape of western Ireland. Three distinct turlough wet-phases were identified based on macroinvertebrate taxon richness and community composition: filling, aquatic and drying phase. Invertebrates able to recolonise the turlough environment quickly upon flooding from refugia (e.g. sink-holes or little puddles) or resting stages within the turlough basin demonstrated highest proportion in abundances during the initial filling phase. Over time, the number of actively dispersing invertebrates, generally occupying turloughs only for a part of their life-cycle, increased. Hydroperiod had a significant effect on macroinvertebrate taxon richness, with short hydroperiods supporting low faunal diversity. Influence of hydrological disturbance generally decreased with progression of the annual wet phase, indicated by a decrease in taxon richness variation and an increase of biodiversity with time. Our study highlights the importance of life-cycle strategies of species for the occurrence of fairly predictable and periodically occurring seasonal patterns, and emphasizes the importance of ecological disturbances for colonisation cycles.
    Keywords: Seasonal variation ; Disturbance ; Macroinvertebrates ; Turloughs ; Hydroperiod
    ISSN: 0018-8158
    E-ISSN: 1573-5117
    Source: Springer Science & Business Media B.V.
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  • 4
    Language: English
    In: Hydrobiologia, 10/2012, Vol.696(1), pp.47-62
    Description: The temporal transition of species dominance following disturbances is strongly influenced by taxon life histories. In temporary water bodies, seasonal progression can be rapid. The community response of aquatic littoral invertebrate communities to disturbance was measured across four temporary water bodies (turloughs) representing a hydroperiod gradient in the karst landscape of western Ireland. Three distinct turlough wet-phases were identified based on macroinvertebrate taxon richness and community composition: filling, aquatic and drying phase. Invertebrates able to recolonise the turlough environment quickly upon flooding from refugia (e.g. sink-holes or little puddles) or resting stages within the turlough basin demonstrated highest proportion in abundances during the initial filling phase. Over time, the number of actively dispersing invertebrates, generally occupying turloughs only for a part of their life-cycle, increased. Hydroperiod had a significant effect on macroinvertebrate taxon richness, with short hydroperiods supporting low faunal diversity. Influence of hydrological disturbance generally decreased with progression of the annual wet phase, indicated by a decrease in taxon richness variation and an increase of biodiversity with time. Our study highlights the importance of life-cycle strategies of species for the occurrence of fairly predictable and periodically occurring seasonal patterns, and emphasizes the importance of ecological disturbances for colonisation cycles.
    Keywords: Colonization ; Community Composition ; Refuges ; Phenology ; Temporary Ponds ; Flooding ; Biodiversity ; Drying ; Zoobenthos ; Adaptations ; Landscape ; Basins ; Drying ; Biodiversity ; Dominance ; Refugia ; Community Composition ; Life History ; Phenology ; Flooding ; Seasonal Variations ; Puddles ; Refugia ; Community Composition ; Life Cycle Analysis ; Sulfur Dioxide ; Biological Diversity ; Disturbance ; Invertebrates ; Water Bodies ; Seasonal Variations ; Phenology ; History ; Karst Hydrology ; Flooding ; Adaptation ; Drying ; Macroinvertebrates ; Invertebrates ; Phenology ; History ; Karst Hydrology ; Flooding ; Adaptation ; Drying ; Macroinvertebrates ; Invertebrates ; Eire ; Ecosystem and Ecology Studies ; Issues in Sustainable Development ; Other Aquatic Communities ; Invertebrates ; General ; Effects of Pollution ; Groundwater;
    ISSN: 0018-8158
    E-ISSN: 1573-5117
    Source: Springer (via CrossRef)
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  • 5
    In: Fundamental and Applied Limnology / Archiv für Hydrobiologie, June 2015, Vol.186(4), pp.279-282
    Description: The following publications mainly Focus on applied aspects of freshwater research, including assessment approaches for the effects of hydromorphological alteration for the functioning of freshwater ecosystems. Hence, this special issue contributes to the development of suitable and viable options for the implementation of monitoring programmes for European freshwaters
    Keywords: Lakes ; Ecosystems ; Coastal Morphology ; Man-Induced Effects ; Biodiversity ; Freshwater Ecology ; Littoral Zone ; Austria ; Germany ; Italy ; Freshwater ; Ecosystems and Energetics;
    ISSN: 1863-9135
    E-ISSN: 23637110
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  • 6
    In: Fundamental and Applied Limnology / Archiv für Hydrobiologie, March 2012, Vol.180(2), pp.123-131
    Description: Human induced shoreline alterations are a common feature of lake ecosystems worldwide. This study investigates the efficiency of different sampling strategies for the monitoring of lakes, including anthropogenically caused shoreline alterations such as erosion control structures or recreational beaches, by comparing littoral macroinvertebrate diversity and community structures of unmodified with soft (recreational beaches) and hard (retaining walls, ripraps) altered shorelines in a central European lake. Littoral macroinvertebrates were sampled at three different shoreline types at Lake Werbellin, Germany using habitat-specific and composite sampling. We tested the efficiency of a single composite sample as an adequate and cost-efficient alternative to labour intensive stratified habitat specific sampling of macroinvertebrates for routine lake monitoring. Both sampling schemes provided similar taxon richness estimates for all shoreline types. Variability in macroinvertebrate community structures within composite replicate samples did not differ significantly from that within habitat-specific replicate samples, with single habitats, however, supporting distinct macroinvertebrate communities. Our results show that composite samples, when collected proportionally to habitat availability at respective sampling sites, effectively represent littoral macroinvertebrate diversity and community structures at modified and unmodified shorelines. We conclude that composite macroinvertebrate samples can be considered as a useful, time- and cost-efficient tool for lake monitoring, but it has yet to be tested whether this method is applicable to other lake types and ecoregions.
    Keywords: Shoreline Alterations ; Macroinvertebrates ; Lake Monitoring ; Recreational Beaches ; Erosion Control Structures ; Shoreline Alterations ; Macroinvertebrates ; Lake Monitoring ; Recreational Beaches ; Erosion Control Structures
    ISSN: 1863-9135
    E-ISSN: 23637110
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  • 7
    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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  • 8
    Language: English
    In: Ecological indicators, 2013, Vol.25, pp.205-214
    Description: Implementation of the EU Water Framework Directive (WFD) has drawn much attention to hydromorphological alterations of surface waters. The Lake Habitat Survey (LHS) protocol provides a method for characterising and assessing the physical habitats of lakes and reservoirs. Two metrics were developed based on this method: the Lake Habitat Modification Score (LHMS) and the Lake Habitat Quality Assessment (LHQA), as measures of lake modification and habitat value, respectively. However, the use of these metrics to predict measures of ecological quality remains largely untested. Thus, we assessed the relationships between LHS metrics and the littoral macroinvertebrate community in 42 lakes across Europe. A significant relationship was found between littoral macrophyte descriptors and riparian natural land cover variables of the LHQA score and macroinvertebrate community composition in 2 out of 4 European regions. No relationship was found between macroinvertebrate community composition and the LHMS. Some significant correlations were found between selected macroinvertebrate metrics and the LHS scores, but this pattern was not consistent across regions, and no relationship was found with the overall LHMS or LHQA scores. This demonstrates that the LHS metrics do not consistently predict the quality of littoral macroinvertebrate communities across Europe, and a region specific approach may be necessary. However, we could demonstrate a relationship between the site specific LHS variables and the macroinvertebrate community at the site level, and in some cases at the regional level. Therefore, although the LHS metrics do not appear to be a useful for relating habitat quality and pressure to littoral macroinvertebrate communities, selected LHS variables may exhibit stronger relationships with the biota. ; p. 205-214.
    Keywords: Land Cover ; Habitats ; European Union ; Macroinvertebrates ; Surface Water ; Lakes ; Surveys ; Community Structure
    ISSN: 1470-160X
    Source: AGRIS (Food and Agriculture Organization of the United Nations)
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  • 9
    Language: English
    In: Ecological Indicators, February 2013, Vol.25, pp.205-214
    Description: ► The relationship between the LHS and the macroinvertebrate community was assessed in 42 lakes. ► There was a significant relationship between LHS and macroinvertebrates in 2 of the 4 regions. ► Some macroinvertebrate metrics correlated with LHS metrics, albeit inconsistently across Europe. ► LHS metrics are not useful for relating habitat quality to littoral macroinvertebrate communities. ► A typology approach may be necessary for different geographical regions. Implementation of the EU Water Framework Directive (WFD) has drawn much attention to hydromorphological alterations of surface waters. The Lake Habitat Survey (LHS) protocol provides a method for characterising and assessing the physical habitats of lakes and reservoirs. Two metrics were developed based on this method: the Lake Habitat Modification Score (LHMS) and the Lake Habitat Quality Assessment (LHQA), as measures of lake modification and habitat value, respectively. However, the use of these metrics to predict measures of ecological quality remains largely untested. Thus, we assessed the relationships between LHS metrics and the littoral macroinvertebrate community in 42 lakes across Europe. A significant relationship was found between littoral macrophyte descriptors and riparian natural land cover variables of the LHQA score and macroinvertebrate community composition in 2 out of 4 European regions. No relationship was found between macroinvertebrate community composition and the LHMS. Some significant correlations were found between selected macroinvertebrate metrics and the LHS scores, but this pattern was not consistent across regions, and no relationship was found with the overall LHMS or LHQA scores. This demonstrates that the LHS metrics do not consistently predict the quality of littoral macroinvertebrate communities across Europe, and a region specific approach may be necessary. However, we could demonstrate a relationship between the site specific LHS variables and the macroinvertebrate community at the site level, and in some cases at the regional level. Therefore, although the LHS metrics do not appear to be a useful for relating habitat quality and pressure to littoral macroinvertebrate communities, selected LHS variables may exhibit stronger relationships with the biota.
    Keywords: Eu Water Framework Directive ; Bioassessment ; Ecological Quality ; Habitat Surveying ; Hydromorphology ; Habitat Metrics ; Macroinvertebrate Metrics ; Macroinvertebrate Community Composition ; Environmental Sciences
    ISSN: 1470-160X
    E-ISSN: 1872-7034
    Source: ScienceDirect Journals (Elsevier)
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  • 10
    Language: English
    In: Aquatic Conservation: Marine and Freshwater Ecosystems, June 2009, Vol.19(4), pp.456-465
    Description: Copyright © 2009 John Wiley & Sons Ltd.
    Keywords: Turloughs ; Temporary Ponds ; Invertebrates ; Habitats Directive ; Water Framework Directive ; Conservation
    ISSN: 1052-7613
    E-ISSN: 1099-0755
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