Biodiversity & Conservation

MarLIN Glossary

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Seagrass
A flowering plant (Phylum Angiospermophyta) that is adapted to living fully submerged and rooted in estuarine and marine environments. Although not true grasses, all seagrasses are monocotyledons. The group is defined by their ecology rather than their phylogeny. In British waters, seagrasses are represented by the genus Zostera (eelgrass). Several members of the genus Ruppia (tasselweeds) also occur in marine and estuarine environments. Ruppia may be considered a seagrass, although this is not accepted universally (Green & Short, 2003).

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Glossary references