In the tropical species Cymodocea rotundata, germination can occur throughout the year. Seeds of Halodule may be dormant for long periods, possi bly extending over many years, while those of Sy-ringodium show only short-term dormancy. However, seeds of Halodule and Syringodium are able to germinate for more than 3 years after they have been released from the parent plant. The longevity of seeds of these species may well exceed that of other seagrasses (McMillan, 1983a).

Finally, it should mentioned that Orth et al. (2000) reviewed seed dormancy, seed bank and germination of seagrasses and the possible applications of this knowledge for the conservation and restoration of seagrass beds (see also Orth et al., Chapter 5).

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