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  • 1
    Online Resource
    Online Resource
    Experimental salt marsh islands: A model system for novel metacommunity experiments
    Elsevier BV ; 2017
    In:  Estuarine, Coastal and Shelf Science Vol. 198 ( 2017-11), p. 288-298
    Details
    In: Estuarine, Coastal and Shelf Science, Elsevier BV, Vol. 198 ( 2017-11), p. 288-298
    Type of Medium: Online Resource
    ISSN: 0272-7714
    URL: Article
    DOI: 10.1016/j.ecss.2017.09.021
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2017
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    SSG: 21,3
    SSG: 12
    SSG: 14
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  • 2
    Online Resource
    Online Resource
    Environmental conditions of a salt-marsh biodiversity experiment on the island of Spiekeroog (Germany)
    Copernicus GmbH ; 2018
    In:  Earth System Science Data Vol. 10, No. 4 ( 2018-10-16), p. 1843-1858
    Details
    In: Earth System Science Data, Copernicus GmbH, Vol. 10, No. 4 ( 2018-10-16), p. 1843-1858
    Abstract: Abstract. Field experiments investigating biodiversity and ecosystem functioning require the observation of abiotic parameters, especially when carried out in the intertidal zone. An experiment for biodiversity–ecosystem functioning was set up in the intertidal zone of the back-barrier salt marsh of Spiekeroog Island in the German Bight. Here, we report the accompanying instrumentation, maintenance, data acquisition, data handling and data quality control as well as monitoring results observed over a continuous period from September 2014 to April 2017. Time series of abiotic conditions were measured at several sites in the vicinity of newly built experimental salt-marsh islands on the tidal flat. Meteorological measurements were conducted from a weather station (WS, https://doi.org/10.1594/PANGAEA.870988), oceanographic conditions were sampled through a bottom-mounted recording current meter (RCM, https://doi.org/10.1594/PANGAEA.877265) and a bottom-mounted tide and wave recorder (TWR, https://doi.org/10.1594/PANGAEA.877258). Tide data are essential in calculating flooding duration and flooding frequency with respect to different salt-marsh elevation zones. Data loggers (DL) for measuring the water level (DL-W, https://doi.org/10.1594/PANGAEA.877267), temperature (DL-T, https://doi.org/10.1594/PANGAEA.877257), light intensity (DL-L, https://doi.org/10.1594/PANGAEA.877256) and conductivity (DL-C, https://doi.org/10.1594/PANGAEA.877266) were deployed at different elevational zones on the experimental islands and the investigated salt-marsh plots. A data availability of 80 % for 17 out of 23 sensors was achieved. Results showed the influence of seasonal and tidal dynamics on the experimental islands. Nearby salt-marsh plots exhibited some differences, e.g., in temperature dynamics. Thus, a consistent, multi-parameter, long-term dataset is available as a basis for further biodiversity and ecosystem functioning studies.
    Type of Medium: Online Resource
    ISSN: 1866-3516
    URL: Article
    DOI: 10.5194/essd-10-1843-2018
    Language: English
    Publisher: Copernicus GmbH
    Publication Date: 2018
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  • 3
    Online Resource
    Online Resource
    Functional trait dimensions of trophic metacommunities
    Wiley ; 2021
    In:  Ecography Vol. 44, No. 10 ( 2021-10), p. 1486-1500
    Details
    In: Ecography, Wiley, Vol. 44, No. 10 ( 2021-10), p. 1486-1500
    Abstract: Metacommunity ecology currently lacks a consistent functional trait perspective across trophic levels. To foster new cross‐taxa experiments and field studies, we present hypotheses on how three trait dimensions change along gradients of density of individuals, resource supply and habitat isolation. The movement dimension refers to the ability to move and navigate in space, the tolerance dimension addresses the ability to tolerate prevailing environmental conditions and the interaction dimension aggregates the abilities to acquire resources in competition with other species, to defend against consumers or to profit from other species by mutualism and facilitation. In multi‐trophic studies, functionally analogous traits associated to these dimensions need to be defined across taxa and measured. The dimensions represent subnetworks of strongly correlated traits within the overall phenotypic trait network. These subnetworks can be aggregated to trait modules using dimension reduction techniques. We demonstrate how to derive dimensions from species distributions and trait correlation networks, using salt marshes as an example. We hypothesize that at the single‐community scale, investments by organisms in the tolerance dimension increase with decreasing resource supply. Investments to the interaction dimension increase with increasing density. Communities with densely packed individuals are characterized by convergence under equal competition and by increasing divergence under stabilizing and equalizing competition. At the metacommunity scale, trade‐offs between the movement dimension and the interaction dimension shape the community functional composition. Biomass removal by consumers act as an equalizing factor and increase divergence in the interaction and movement dimension, particularly in well‐connected habitats. As future research directions to advance functional metacommunity ecology, we propose investigating 1) the feasibility of using dimensions as broad generalizations of multiple functions in different meta‐ecosystems, 2) functional trait analogues across taxa, 3) dimension responses and effects on gradients of meta‐ecosystems and 4) matching of functionally analogous traits between trophic levels.
    Type of Medium: Online Resource
    ISSN: 0906-7590 , 1600-0587
    URL: Issue
    URL: Article
    DOI: 10.1111/ecog.2021.v44.i10
    DOI: 10.1111/ecog.05869
    Language: English
    Publisher: Wiley
    Publication Date: 2021
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    detail.hit.zdb_id: 1112659-0
    SSG: 12
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  • 4
    Online Resource
    Online Resource
    Spatial and temporal patterns of initial plant establishment in salt marsh communities
    Wiley ; 2020
    In:  Journal of Vegetation Science Vol. 31, No. 6 ( 2020-11), p. 1122-1132
    Details
    In: Journal of Vegetation Science, Wiley, Vol. 31, No. 6 ( 2020-11), p. 1122-1132
    Abstract: How are dispersal processes, abiotic and biotic interactions determining the initial salt marsh plant community establishment and development when connectivity is different? We aim to answer this question by analysing the spatial and temporal patterns of plant establishment along an environmental gradient at two connectivity settings. Location Back‐barrier salt marsh and tidal flats of Spiekeroog, northwest Germany. Methods We established an experiment along a saltmarsh elevation gradient with bare sediment open for spontaneous colonisation on the natural salt marsh and on the experimental salt marsh islands built on the tidal flats approximately 500 m from the natural salt marsh for low connectivity. Plant establishment was identified from georeferenced photos at least monthly. Results Experimental islands as low‐connectivity plots had limited colonisation by annual halophytes that produced large number of small seeds. Number of individuals increased with higher connectivity at patches enclosed by salt marsh. Number of individuals was highest at the mid elevations whereas peak species richness was at the upper salt marsh. Temporal patterns of seedling emergence showed increasing plant numbers until the end of April followed by a gradual decline over the season at the pioneer and lower salt marsh zones. Upper elevations on the other hand had a stable number of low individual counts over time. Spatial clustering of plant individuals indicating possible facilitation was important at the initial stages of salt marsh development at pioneer and lower salt marsh elevation, but only early in the season. Conclusions Stochastic patterns of early salt marsh colonisation indicated that success of species colonisation was determined by seed properties, seed availability and environmental conditions mediated by elevation. We found indications that at the initial stages, further colonisation was supported by already colonised plants but shifted to avoidance later in the season.
    Type of Medium: Online Resource
    ISSN: 1100-9233 , 1654-1103
    URL: Issue
    URL: Article
    DOI: 10.1111/jvs.v31.6
    DOI: 10.1111/jvs.12915
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2020
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    detail.hit.zdb_id: 1053769-7
    SSG: 12
    SSG: 23
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