With 3 figures and 2 tables
Comparison Between the Energy Flow Networks of Two Habitats in the Venice Lagoon
Article first published online: 25 JUL 2005
Volume 23, Issue Supplement s1, pages 228–236, December 2002
How to Cite
Libralato, S., Pastres, R., Pranovi, F., Raicevich, S., Granzotto, A., Giovanardi, O. and Torricelli, P. (2002), Comparison Between the Energy Flow Networks of Two Habitats in the Venice Lagoon. Marine Ecology, 23: 228–236. doi: 10.1111/j.1439-0485.2002.tb00022.x
- Issue published online: 25 JUL 2005
- Article first published online: 25 JUL 2005
- Trophic networks;
- energy flows;
- Tapes philippinarum;
- Venice Lagoon
Abstract. The energy flows of two habitats are quantified and compared by using a trophic network model. The habitats are representative of two typical subsystems of the Venice Lagoon: the seagrass meadows, which represent a mature stage in the ecological succession of lagoon environments, and the Tapes philippinarum fishing grounds, which are subjected to mechanical clam harvesting.
The results obtained for the 'seagrass habitat’are consistent with other field studies, confirming the‘key-stone’role played by phanerogams in a lagoon environment. The results for the ‘Tapes habitat’show that the energy flow from the sediment to the water column is extremely important. Indeed, the high T. philippinarum biomass cannot be supported solely by the primary production of the local phytoplankton. Instead, this biomass could be supported by a supply provided by the sediment resuspension caused by intensive clam fishing. These findings suggest the presence of a positive feedback between fishing effort and T. philippinarum standing crop.