Reference : Variations at different spatial scales of Posidonia oceanica (L.) Delile beds; effects o...
Scientific journals : Article
Life sciences : Phytobiology (plant sciences, forestry, mycology...)
Life sciences : Environmental sciences & ecology
http://hdl.handle.net/2268/11518
Variations at different spatial scales of Posidonia oceanica (L.) Delile beds; effects on the physico-chemical parameters of the sediment
French
Gobert, Sylvie mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > MARE Océanologie > > >]
Kyramarios, Michael [> >]
Lepoint, Gilles mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
Pergent-Martini, Christine [> >]
Bouquegneau, Jean-Marie mailto [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
2003
Oceanologica Acta
Elsevier Science
26
2
199-207
Yes
International
0399-1784
Paris
France
[en] Posidonia oceanica ; spatial distribution
[fr] sédiment
[en] Mediterranean Sea ; seagrass
[fr] distribution spatiale ; biomasse
[en] The biometric parameters (shoot density, length and width of leaves, leaf and epiphyte biomasses, leaf surface) of the P. oceanica meadow present a significant spatial variability at the mesoscale level (100 m2). All the parameters studied, excepting the number of leaves, decrease according to the depth. The horizontal spatial variations (centrifuge and centripetal distributions) reach a maximum in the shallower areas. The analysis of the microstructures (m2) of the meadow has not allowed a relationship to be established between the spatial variations of the biometric parameters and the environmental factors in the sediment (pH, water and organic matter content, red-ox potential, nutrient content). The heterogeneity of the meadow in the Revellata Bay quite probably results from the internal shoot and rhyzome growth dynamics.
<br />On the other hand, it appears that the presence of the prairie modifies the physical-chemical characteristics of the sediment. In fact, the sandy patches present different physical-chemical characteristics: lower organic matter, different granulometric and much higher interstitial water nutrient levels, as well as a higher pH and oxydo-reduction potential.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/11518
also: http://hdl.handle.net/2268/11514

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