|Nitrogen dynamics in Posidonia oceanica cuttings: implications for transplantation experiments|Lepoint, G.; Vangeluwe, D.; Eisinger, M.; Paster, M.; van Treeck, P.; Bouquegneau, J.-M.; Gobert, S. (2004). Nitrogen dynamics in Posidonia oceanica cuttings: implications for transplantation experiments. Mar. Pollut. Bull. 48(5-6): 465-470. dx.doi.org/10.1016/j.marpolbul.2003.08.023
In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X; e-ISSN 1879-3363, meer
Posidonia König, 1805 [WoRMS]; Posidonia oceanica (Linnaeus) Delile, 1813 [WoRMS]; Marien
Posidonia; seagrass; transplantation; nitrogen budget; N-15 tracer; NW
|Auteurs|| || Top |
- Lepoint, G.
- Vangeluwe, D.
- Eisinger, M.
- Paster, M.
- van Treeck, P.
- Bouquegneau, J.-M.
- Gobert, S.
A 15N tracer study was performed during an experimental transplantation trial of natural Posidonia oceanica cuttings. The experiment was done in situ at 17 m depth in the Revellata Bay (Calvi, NW Corsica, France). Despite high survival rates of transplants (>90%) after one year, the weight and the N content of transplants are significantly lower than those of reference plants. In absence of roots, the transplants are not able to meet their N requirement because, leaf uptake is insufficient to replenish the N lost during the natural leaf decay. This could constitute a major cause of long-term failure for transplantation experiments or natural recolonisation processes. The increase of the 15N content in the roots shows that the plant re-allocates the nitrogen of one organ (i.e. leaves, rhizomes) to ensure the growth of another (i.e. roots).