000K  utf8
1100  $c2019
1500  eng
2050  urn:nbn:de:gbv:8-diss-254923
3000  van der Heijden, Luuk
4000  Determination of the food sources and of the role of meiofauna in soft-bottom intertidal habitats of the Marennes-Oléron Bay, France, and the Sylt-Rømø Bight, Germany. Importance of themicrophytobenthos-meiofauna pathway, highlighted by community structure, trophic markers and linear inverse food web models.$hChristian-Albrechts-Universität zu Kiel  [van der Heijden, Luuk]
4000  Rolle der Meiofauna und ihre Nahrungsquellen in intertidalen Habitaten der Marennes-Oléron Bucht, Frankreich, und der Sylt-Rømø Bucht, Deutschland.Bedeutung der Mikrophytobenthos-Meiofauna-Nahrungskette, dargestellt am Beispiel der Gemeinschaftsstruktur, der trophischen Marker und linearer inverser Nahrungsnetzmodelle.$hChristian-Albrechts-Universität zu Kiel  [van der Heijden, Luuk]
4030  Kiel$nChristian-Albrechts-Universität zu Kiel
4209  Meiofauna play an important role in ecosystem processes in soft-bottom benthic habitats, e.g. food web dynamics, related to their high production, their intermediate trophic position and the energy they transfer towards higher trophic levels. The trophic linkages and flows of organic matter related to the meiofauna remain poorly known or taken into account. To better assess the role of meiofauna, the community structure and trophic relationships between food sources and meiofauna were determined in five intertidal soft-bottom habitats (i.e., mudflat, seagrass bed, sandflat) of the Marennes-Oléron Bay, France, and the Sylt-Rømø Bight, Germany, taking temporal variations into account. Meiofauna communities were dominated by nematodes and benthic copepods. Biomass of microphytobenthos and of sediment organic matter were two of the major drivers of community structure. The combination of trophic markers (i.e., stable isotopes, fatty acids) demonstrated that microphytobenthos and bacteria were the major food sources of meiofauna in the five habitats. Information from community structure assessments and trophic marker analyses were implemented in food web models. In all habitats, these models demonstrated that the main flow of carbon to meiofauna originated from microphytobenthos, highlighting negligible changes in meiofauna feeding behavior besides the large differences in availability and productivity of food sources between these habitats. All trophic groups of nematodes, except for selective deposit feeding nematodes, were highly selective and mainly fed on microphytobenthos, resulting in a high production and a short turn-over time of meiofauna. In conclusion, this thesis demonstrated the important role of meiofauna in soft-bottom habitats as well as the importance of the trophic pathway from microphytobenthos to meiofauna in the functioning of these food webs.
4950  https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-254923$xR$3Volltext$534
4961  https://macau.uni-kiel.de/receive/diss_mods_00025492
5051  570
5550  benthic copepods
5550  benthische Copepoden
5550  community structure
5550  compound-specific isotope analyses
5550  ecological food web model
5550  fatty acids
5550  Fettsäuren
5550  free-living marine nematodes
5550  Frei-lebende marine Nematoden
5550  Gemeinschaftsstruktur
5550  Komponenten-spezifische Isotopenanalyse
5550  microphytobenthos
5550  Microphytobenthos
5550  mudflats
5550  Ökologisches Nahrungsnetzmodell
5550  sandflats
5550  Sandwatten
5550  Schlickwatten
5550  seagrass beds
5550  Seegraswiesen
5550  Stabile Isotopen
5550  stable isotopes