Abstract
We examined the seasonality and magnitude of the leaf-blade, rhizome and root biomass and production, along with the fate of leaf-blade production, of the 4 Mediterranean seagrass species Posidonia oceanica, Cymodocea nodosa, Zostera noltii and Zostera marina in a protected northern Spanish bay (Cala Jonquet, 42 degree 18.26' N, 3 degree 18.11' E) to estimate (1) the annual production consumed by herbivores or decomposed by detritivores and (2) the production in excess of consumption and first-year decomposition, which should be an upper limit of long-term burial of refractory detritus.