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| Pergentmartini, C; Pergent, G. |
| After blade shedding in the seagrass Posidonia oceanica, leaf sheaths remain attached to the rhizome and can persist for several decades within a ''matte'' They show, according to their insertion rank, cyclical variations in parameters such as thickness and tissue structure. These cycles are always annual, and may be influenced by environmental parameters such as light, temperature or water movement. The study of cyclic changes in Posidonia oceanica sheaths is thus a technique that can be used to investigate past changes in the near-shore environment. By analogy with dendrochronology, this study is termed lepidochronology. A number of applications of lepidochronological analysis have already been successfully tested : (i) Estimation of the growth rate and... |
| Tipo: Text |
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| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00099/21019/18645.pdf |
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| Lafabrie, Céline; Pergent, G; Kantin, Roger; Pergent Martini, C; Gonzalez, Jean-louis. |
| The accumulation of trace metals (Cd, Co, Cr, Hg, Ni and Pb) was measured in water, sediment, the mussel Mytilus galloprovincialis and the seagrass Posidonia oceanica. Samples were collected in three locations of the north-western Mediterranean (Canari, Livorno and Porto-Torres) which present different levels and sources of human impact. Analyses in the different compartments (water, sediment, M. galloprovincialis and P. oceanica) have allowed to identify Canari as the most Cd, Co, Cr and Ni contaminated site; Livorno as the most Hg contaminated and Porto-Torres as the most Pb contaminated. Furthermore, for the first time, metal concentrations found in P. oceanica have been compared with those found in the water column, in the sediment and in the... |
| Tipo: Text |
Palavras-chave: Mediterranean sea; Marine organisms; Sediment; Seawater; Biomonitoring; Metal contamination. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3106.pdf |
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