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| Titel |
Resource utilization and trophic position of nematodes and harpacticoid copepods in and adjacent to Zostera noltii beds |
| VerfasserIn |
A.-M. Vafeiadou, P. Materatski, H. Adão, M. De Troch, T. Moens |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 11, no. 14 ; Nr. 11, no. 14 (2014-07-31), S.4001-4014 |
| Datensatznummer |
250117530
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| Publikation (Nr.) |
 copernicus.org/bg-11-4001-2014.pdf |
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| Zusammenfassung |
| This study examines the resource use and trophic position of nematodes and
harpacticoid copepods at the genus/species level in an estuarine food web in
Zostera noltii beds and in adjacent bare sediments using the natural abundance of stable
carbon and nitrogen isotopes. Microphytobenthos and/or epiphytes are among
the main resources of most taxa, but seagrass detritus and sediment
particulate organic matter contribute as well to meiobenthos nutrition,
which are also available in deeper sediment layers and in unvegetated patches
close to seagrass beds. A predominant dependence on chemoautotrophic
bacteria was demonstrated for the nematode genus Terschellingia and the copepod family
Cletodidae. A predatory feeding mode is illustrated for Paracomesoma and other
Comesomatidae, which were previously considered first-level consumers
(deposit feeders) according to their buccal morphology. The considerable
variation found in both resource use and trophic level among nematode genera
from the same feeding type, and even among congeneric nematode species,
shows that the interpretation of nematode feeding ecology based purely on mouth
morphology should be avoided. |
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