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- Title
Food web analysis in intertidal Zostera marina and Zostera noltii communities in winter and summer.
- Authors
Ouisse, Vincent; Riera, Pascal; Migné, Aline; Leroux, Cédric; Davoult, Dominique
- Abstract
The food web of two intertidal seagrass ( Zostera marina and Zostera noltii) beds that may be influenced by the seasonal variation in food source abundance was studied in winter and in summer with δC and δN analysis. In spite of high relative variation of abundance of main primary producers at the two sites, the food web did not vary between winter and summer. The δC range of primary producers was wide. Zostera leaves, the most C-enriched source, were not consumed directly by grazers. Deposit and filter feeders have a similar δC and could use a mix of suspended and sedimented organic particulate matter, largely composed of detritus from macroalgae to seagrass. This trophic pathway allows the local incorporation of the high biomass produced by seagrasses. The wide δN range of predators was linked either to a large variety from omnivore to carnivore predators or to the also wide ranges of δN of primary consumers.
- Subjects
FOOD chains; SEAGRASSES; ZOSTERA marina; ZOSTERA noltii; PLANT biomass
- Publication
Marine Biology, 2012, Vol 159, Issue 1, p165
- ISSN
0025-3162
- Publication type
Article
- DOI
10.1007/s00227-011-1796-2