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  • 1
    In: Ecological Indicators, Elsevier BV, Vol. 70 ( 2016-11), p. 409-419
    Type of Medium: Online Resource
    ISSN: 1470-160X
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2016
    detail.hit.zdb_id: 2063587-4
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  • 2
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2015
    In:  Biodiversity and Conservation Vol. 24, No. 2 ( 2015-2), p. 337-353
    In: Biodiversity and Conservation, Springer Science and Business Media LLC, Vol. 24, No. 2 ( 2015-2), p. 337-353
    Type of Medium: Online Resource
    ISSN: 0960-3115 , 1572-9710
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2015
    detail.hit.zdb_id: 2000787-5
    SSG: 12
    SSG: 23
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  • 3
    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
    Language: English
    Publisher: Wiley
    Publication Date: 2021
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    detail.hit.zdb_id: 1112659-0
    SSG: 12
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  • 4
    In: Applied Vegetation Science, Wiley, Vol. 21, No. 3 ( 2018-07), p. 363-372
    Abstract: Do mid‐field forest fragments and margins around them compensate for the loss of floral ecosystem services provided by semi‐natural grasslands? Location Seven habitat types in central and southeast Estonia. Methods Using three properties of service quality – functional Diversity, functional Intensity, and functional Stability (DIS‐system)– we addressed flower colour richness, flower size, and species richness within colour group, respectively. We also considered the human and pollinator perspective, and the seasonal dynamics of flowering. Results Closed‐canopy edges of forests and forest core areas contrasted to semi‐natural grasslands and grassland surrogates in some indicators of species composition, such as proportion of forbs, but less unequivocally in more specific indicators of service quality. Habitats ranked quite similarly from both a human and pollinator perspective, except the human perspective overstated the compositional and service quality of all open habitats. From a human perspective, forest service quality was downgraded in all three service provision properties in comparison to other habitats, while pollinators would see the strong contrast of forests only in flower size (functional intensity). Only south‐exposed close‐canopy edges and particularly outer grassy edges of forests somewhat resembled the quality of grassland surrogates for both user groups. Conclusions The ecosystem service provision quality of a habitat should be evaluated using a set of functional indicators, considering user group specific perception and phenology. Small mid‐field forests only partly substitute for the floral‐based services provided by grasslands, but their role can be improved by selectively opening up the overstorey at forest margins and expanding outer forest margin grasslands.
    Type of Medium: Online Resource
    ISSN: 1402-2001 , 1654-109X
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2053083-3
    SSG: 12
    SSG: 23
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  • 5
    Online Resource
    Online Resource
    Wiley ; 2020
    In:  Journal of Vegetation Science Vol. 31, No. 6 ( 2020-11), p. 1122-1132
    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
    RVK:
    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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  • 6
    Online Resource
    Online Resource
    Springer Science and Business Media LLC ; 2017
    In:  Plant Ecology Vol. 218, No. 4 ( 2017-4), p. 417-431
    In: Plant Ecology, Springer Science and Business Media LLC, Vol. 218, No. 4 ( 2017-4), p. 417-431
    Type of Medium: Online Resource
    ISSN: 1385-0237 , 1573-5052
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2017
    detail.hit.zdb_id: 1364679-5
    detail.hit.zdb_id: 1479167-5
    SSG: 12
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  • 7
    Online Resource
    Online Resource
    Frontiers Media SA ; 2022
    In:  Frontiers in Ecology and Evolution Vol. 10 ( 2022-9-14)
    In: Frontiers in Ecology and Evolution, Frontiers Media SA, Vol. 10 ( 2022-9-14)
    Abstract: Microphytobenthos (MPBs) are the main primary producers in shallow marine ecosystems, such as the Wadden Sea. We investigated the spatial and temporal dynamics of MPB communities across the marine-terrestrial boundary over three seasons (spring, summer, and fall) on three East Frisian Islands (Norderney, Spiekeroog, and Wangerooge) in the German Wadden Sea. Natural transects were compared with 12 experimental islands (salt marsh vegetated vs. initially bare islands) established on the tidal flats of Spiekeroog for studying dispersal-mediated community assembly. Sediment cores were taken along triplicate transects and on three elevation levels of the experimental islands, corresponding to the pioneer (pio) zone, the lower salt (LS) marsh, and the upper salt (US) marsh. On both the natural transects and the experimental islands, the highest MPB biomass was observed in the pio zone, where vegetation-driven sediment stabilization and high-mud content could have promoted MPB biomass in this marine-terrestrial transition zone. On the experimental islands, MPB biomass and diversity significantly decreased with elevation regardless of the season, indicating that the rarely submerged upper salt marsh level supported minimal MPB growth. The MPB biomass was also higher on initially vegetated than on bare islands, which was the most pronounced on the US level. On the tidal flat transects, the MPB biomass significantly increased with elevation up to the pio zone before decreasing again in the LS marsh. Temperature, sediment water content, and grain size significantly affected transect MPB biomass. MPB diversity, on the other hand, was not related to elevation but was rather determined by temperature, mean grain size, and mud content. Our study suggests that extending MPB studies into the “terrestrial” domain of salt marshes enhances our understanding of the microalgae–plant interaction in this important boundary zone.
    Type of Medium: Online Resource
    ISSN: 2296-701X
    Language: Unknown
    Publisher: Frontiers Media SA
    Publication Date: 2022
    detail.hit.zdb_id: 2745634-1
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  • 8
    Online Resource
    Online Resource
    Copernicus GmbH ; 2018
    In:  Earth System Science Data Vol. 10, No. 4 ( 2018-10-16), p. 1843-1858
    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
    Language: English
    Publisher: Copernicus GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 2475469-9
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  • 9
    In: Ecology and Evolution, Wiley, Vol. 13, No. 12 ( 2023-12)
    Abstract: Ecology aims to comprehend species distribution and its interaction with environmental factors, from global to local scales. While global environmental changes affect marine biodiversity, understanding the drivers at smaller scales remains crucial. Tidal flats can be found on most of the world's coastlines and are particularly vulnerable to anthropogenic disturbances. They are important transient ecosystems between terrestrial and marine ecosystems, and their biodiversity provides important ecosystem services. Owing to this unique, terrestrial–marine transition, strong environmental gradients of elevation, sediment composition and food availability prevail. Here, we investigated which regional and local environmental factors drive the spatio‐temporal dynamics of macrozoobenthos communities on back‐barrier tidal flats in the East Frisian Wadden Sea. On the regional level, we found that species composition changed significantly from west to east on the East Frisian islands and that total abundance and species richness decreased from west to east. On the local abiotic level, we found that macrozoobenthos biomass decreased with higher elevation towards the salt marsh and that the total abundance of organisms in the sediment significantly increased with increasing mud content, while biodiversity and biomass were not changing significantly. In contrast to expectations, increasing Chl a availability as a measure of primary productivity did not result in changes in abundance, biomass or biodiversity, but extremely high total organic carbon (TOC) content was associated with a decrease in biomass and biodiversity. In conclusion, we found regional and local relationships that are similar to those observed in previous studies on macrozoobenthos in the Wadden Sea. Macrozoobenthos biomass, abundance and biodiversity are interrelated in a complex way with the physical, abiotic and biotic processes in and above the sediment.
    Type of Medium: Online Resource
    ISSN: 2045-7758 , 2045-7758
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 2635675-2
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  • 10
    In: Estuarine, Coastal and Shelf Science, Elsevier BV, Vol. 198 ( 2017-11), p. 288-298
    Type of Medium: Online Resource
    ISSN: 0272-7714
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2017
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    detail.hit.zdb_id: 763369-5
    SSG: 21,3
    SSG: 12
    SSG: 14
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