Skip to main content

Free Content The trophic role of the macrophyte Cymodocea nodosa (Ucria) Asch. in a Mediterranean saltworks: Evidence from carbon and nitrogen stable isotope ratios

Download Article:
(PDF 227.013671875 kb)
A multiple stable isotope analysis (δ13C and δ15N) was used to determine the trophic role of the seagrass Cymodocea nodosa (Ucria) Asch. for consumers in a Mediterranean saltworks. Stable carbon and nitrogen isotope ratios performed on primary producers and consumers in February and July 1999 showed that C. nodosa is not a direct dietary source via grazing. No animal presented carbon values as enriched as the seagrass (−7.8‰). The trophic role of Cymodocea occurs through the detritus route via SOM. Sedimentary organic matter (SOM) (δ13C = −16.5‰) seems to be a mixture of particulate organic matter (δ13C = −19.0‰), algae (δ13C = −18.6‰) and seagrass detritus (δ13C = −7.7‰). The results of a mixing model suggest that Cymodocea detritus contribution to SOM varied temporally, a greater role in February than in July. In July the enriched values of both stable carbon and nitrogen isotopes of several primary producers and consumers in comparison with February (about +2‰ for primary producers, +3.5‰ for invertebrates and +1‰ for fish) suggest that less depleted carbon and nitrogen (probably from seagrass detritus) influence food web structure.Cymodocea has an important structuring role as seagrass blades are extensively colonised by a complex vegetal community which provides food and habitats for invertebrates. The δ13C of the animals suggests that epiphytes may represent an important ultimate organic matter source together with SOM.

27 References.

No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: 2002-11-01

More about this publication?
  • The Bulletin of Marine Science is dedicated to the dissemination of high quality research from the world's oceans. All aspects of marine science are treated by the Bulletin of Marine Science, including papers in marine biology, biological oceanography, fisheries, marine affairs, applied marine physics, marine geology and geophysics, marine and atmospheric chemistry, and meteorology and physical oceanography.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more