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  • 1
    Publication Date: 2019-02-01
    Description: Climate change will not only shift environmental means but will also increase the intensity of extreme events, exerting additional stress on ecosystems. While field observations on the ecological consequences of heat waves are emerging, experimental evidence is rare, and lacking at the community level. Using a novel "near-natural" outdoor mesocosms approach, this study tested whether marine summer heat waves have detrimental consequences for macrofauna of a temperate coastal community, and whether sequential heat waves provoke an increase or decrease of sensitivity to thermal stress. Three treatments were applied, defined and characterized through a statistical analysis of 15 years of temperature records from the experimental site: (1) no heat wave, (2) two heat waves in June and July followed by a summer heat wave in August and (3) the summer heat wave only. Overall, 50% of the species showed positive, negative or positive/negative responses in either abundance and/or biomass. We highlight four possible ways in which single species responded to either three subsequent heat waves or one summer heat wave: (1) absence of a response (tolerance, 50% of species), (2) negative accumulative effects by three subsequent heat waves (tellinid bivalve), (3) buffering by proceeding heat waves due to acclimation and/or shifts in phenology (spionid polychaete) and (4) an accumulative positive effect by subsequent heat waves (amphipod). The differential responses to single or sequential heat waves at the species level entailed shifts at the community level. Community-level differences between single and triple heat waves were more pronounced than those between regimes with vs. without heat waves. Detritivory was reduced by the single heat wave while suspension feeding was less common in the triple heat wave regime. Critical extreme events occur already today and will occur more frequently in a changing climate, thus, leading to detrimental impacts on coastal marine systems.
    Type: Article , PeerReviewed
    Format: text
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  • 2
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    Springer
    In:  In: YOUMARES 8 – Oceans Across Boundaries: Learning from each other. Springer, Cham, Switzerland, pp. 167-178. ISBN 978-3-319-93284-2
    Publication Date: 2019-01-14
    Description: The dramatic decline of biodiversity worldwide has raised a general concern on the impacts this process could have for the well-being of humanity. Human societies strongly depend on the benefits provided by natural ecosystems, which are the result of biogeochemical processes governed by species activities and their interaction with abiotic compartments. After decades of experimental research on the biodiversity-functioning relationship, a relative agreement has been reached on the mechanisms underlying the impacts that biodiversity loss can have on ecosystem processes. However, a general consensus is still missing. We suggest that the reason preventing an integration of existing knowledge is the scale discrepancy between observations on global change impacts and biodiversity-functioning experiments. The present chapter provides an overview of global change impacts on biodiversity across various ecological scales and its consequences for ecosystem functioning, highlighting what is known and where knowledge gaps still persist. Furthermore, the reader will be introduced to a set of tools that allow a multi-scale analysis of how global change drivers impact ecosystem functioning.
    Type: Book chapter , NonPeerReviewed
    Format: text
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  • 3
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    In:  (Master thesis), Christian-Albrechts-Universität Kiel, Kiel, Germany, 74 pp
    Publication Date: 2015-09-09
    Keywords: Course of study: MSc Biological Oceanography
    Type: Thesis , NonPeerReviewed
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  • 4
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 6
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    Wissenschaftliche Auswertungen
    In:  In: Warnsignal Klima: Die Biodiversität. , ed. by Lozan, J. L., Breckle, S. W., Müller, R. and Rachor, E. Wissenschaftliche Auswertungen, Hamburg, Germany, pp. 277-283. ISBN 978-3-9809668-1-8
    Publication Date: 2019-07-08
    Description: Dieses Kapitel bietet dem Leser eine Einleitung in die Biodiversität der Ostsee mit Schwerpunkt auf denn vorherrschenden Trends und den umweltbedingten sowie anthropogen-verursachten Stressoren, die das marine Leben dieser Region beeinflussen. Eine intensive Literaturrecherche zeigt die übereinstimmende Auffassung über die schädlichen Folgen des globalen Wandels, der Eutrophierung, biologischer Invasionen, der Zerstörung von Lebensräumen und der Überbeanspruchung kommerziell genutzter Arten für die Biodiversität dieser Region. Interaktionen dieser Umweltbelastungen, sowie die äußerst variablen Umweltbedingungen auf regionaler und lokaler Ebene und die heterogenen Toleranzen der vorkommenden Arten beeinträchtigen eine Abschätzung über die Folgen des Biodiversitätsverlustes für marine Ökosysteme. Dies wird zusätzlich durch Wissenslücken zum aktuellen Status der Biodiversität erschwert. Deshalb soll in diesem Kapitel ein kritischer Blick auf fehlende Informationen und deren Gründe geworfen werden, um Impulse für die Priorisierung künftiger ökologischer Studien zu setzen, welche effektive Strategien für den Erhalt und die nachhaltige Nutzung der Ostsee in Zeiten des globalen Wandels ermöglichen sollen. The present chapter will introduce the reader to the biodiversity of the Baltic Sea, paying special attention to the trends currently described and the environmental and human stressors that affect marine life. An intensive revision of the available scientific bibliography showed a general agreement on the detrimental effects that global warming, eutrophication, biological invasions, habitat destruction and overexploitation have on the biodiversity in this region. The interactions between these human pressures, highly variable environmental conditions at regional and local scales, and the heterogeneous tolerances of resident species prevent the prediction of the potential consequences that the loss of biodiversity could have on marine ecosystems. Knowledge gaps on the current state of biodiversity increase the uncertainty. In this context, the present chapter will give a critical look towards missing information and its causes, highlighting what the priorities of ecological research should be, in order to generate effective conservation strategies for the biodiversity of the Baltic Sea in a century of dramatic changes.
    Type: Book chapter , NonPeerReviewed
    Format: text
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  • 7
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    Copernicus Publications (EGU)
    In:  Earth System Science Data, 11 . pp. 947-957.
    Publication Date: 2019-07-11
    Description: The coastal waters of the Baltic Sea are subject to high variations in environmental conditions, triggered by natural and anthropogenic causes. Thus, in situ measurements of water parameters can be strategic for our understanding of the dynamics in shallow water habitats. In this study we present the results of a monitoring program at low water depths (1–2.5 m), covering 13 stations along the Baltic coast of Schleswig-Holstein, Germany. The provided dataset consists of records for dissolved inorganic nutrient concentrations taken twice a month and continuous readings at 10 min intervals for temperature, salinity and oxygen content. Data underwent quality control procedures and were flagged. On average, a data availability of 〉90 % was reached for the monitoring period within 2016–2018. The obtained monitoring data reveal great temporal and spatial variabilities of key environmental factors for shallow water habitats in the southwestern Baltic Sea. Therefore the presented information could serve as realistic key data for experimental manipulations of environmental parameters as well as for the development of oceanographic, biogeochemical or ecological models.
    Type: Article , PeerReviewed
    Format: text
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  • 8
    Publication Date: 2019-08-09
    Type: Dataset
    Format: text/tab-separated-values, 551050 data points
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  • 9
    Publication Date: 2019-08-09
    Type: Dataset
    Format: text/tab-separated-values, 586360 data points
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  • 10
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    PANGAEA
    In:  Supplement to: Franz, Markus; Lieberum, Christian; Bock, Gesche; Karez, Rolf (2019): Environmental parameters of shallow water habitats in the SW Baltic Sea. Earth System Science Data, 11(3), 947-957, https://doi.org/10.5194/essd-11-947-2019
    Publication Date: 2019-08-09
    Description: The coastal areas of the Baltic Sea represent highly variable environments. In order to record the environmental conditions in shallow water habitats of the SW Baltic Sea, a monitoring program was established. The monitoring sites are located along the Baltic Sea coast of Schleswig-Holstein, Germany. Thirteen stations were established, with samplings for dissolved inorganic nutrient concentrations at all stations and continuous recordings of environmental parameters (temperature, salinity, dissolved oxygen) at nine stations, respectively. Twice per month water samples were collected from a water depth of 1 m at all stations. The samples were analyzed for the concentration of dissolved inorganic nutrients (total oxidized nitrogen, nitrite, ammonia, phosphate and silicate) by UV/VIS spectroscopy using a Continuous Flow Analyzer (San++ Automated Wet Chemistry Analyzer, Skalar Analytical B.V.). For continuous recordings of temperature, salinity and dissolved oxygen concentrations, self-contained data loggers were deployed at 2.5 m depth. Two types of data loggers were used in this study: (I) MiniDOT loggers (Precision Measurement Engineering; http://pme.com; ±10 µmol L-1 or ±5 % saturation) including antifouling copper option (copper plate and mesh) to measure dissolved oxygen concentration and (II) DST CT salinity & temperature loggers (Star-Oddi; http://star-oddi.com; ±1.5 mS cm-1) recorded the conductivity. Both sensors additionally recorded water temperature with an accuracy of ± 0.1 °C. The sampling interval was set to 10 minutes for all parameters. The data for dissolved oxygen concentration was corrected for a depth of 2.5 m using the software provided by the manufacturer. Additionally, a manual compensation for salinity was calculated (see details in related article). Quality control was carried out by implementing spike and gradient tests, following recommendations of SeaDataNet quality control procedures (see https://seadatanet.org/Standards/Data-Quality-Control). All data values were flagged according to applied quality checks using the following flags: 1 = Pass, 2 = Suspect, 3 = Fail, 4 = Visually suspect, 5 = Salinity compensation fail (further explanations can be found in related article). Please note that for station 6 no data for temperature, salinity and dissolved oxygen concentration are available, since the complete logger station failed.
    Type: Dataset
    Format: application/zip, 17 datasets
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