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Scottish Seagrass Communities of the Genus Zostera
Member rating: No Rating | Words: | Submitted: Mon Apr 24 2006
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Scottish Seagrass Communities of the Genus Zostera Introduction Seagrasses comprise <0.02% of the angiosperm flora, representing a surprisingly small number of species, of which the principal genus is Zostera spp (Heeminga & Duarte 2000). Zostera occur widely in coastal zones throughout the world and therefore are integral to decisions about coastal management. Zostera can be biogeographically classified as temperate North Atlantic (Heeminga & Duarte 2000). All three species of the genus, Zostera marina L. (eelgrass), Zostera noltii (dwarf eelgrass), and Zostera angustifolia (narrow-leaved eelgrass) are found in Scottish coastal waters and are increasingly becoming threatened (Cleator 1993; UK BAP 2006). Zostera species are perennial angiosperms restricted to the intertidal and shallow subtidal fringe. The tolerable depth limit for Zostera species is set by light available for photosynthesis. The upslope limit to seagrass extension is imposed by sufficient immersion in seawater or tolerable disturbance by waves. Eelgrass communities will typically zonate...
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