Najas marina

Tracheophyta MagnoliopsidaNajadaceaeNajasNajas marina

Ecology

N. marina grows in meso-eutrophic water over deep substrates of peat or silty mud in the Norfolk broads. It is a dioecious annual, with both male and female plants in Britain. Lowland.

Status

Native

World Distribution

Circumpolar Southern-temperate element, with a continental distribution in W. Europe.

Broad Habitats

Standing water and canals

Light (Ellenberg): 5

Moisture (Ellenberg): 12

Reaction (Ellenberg): 9

Nitrogen (Ellenberg): 6

Salt Tolerance (Ellenberg): 0

January Mean Temperature (Celsius): 3.9

July Mean Temperature (Celsius): 16.1

Annual Precipitation (mm): 600

Length: 97

Perennation - primary

Annual

Life Form - primary

Annual hydrophyte (aquatic therophyte)

Woodiness

Herbaceous

Clonality - primary

Little or no vegetative spread

Count of 10km squares in Great Britain: 4

Count of 10km squares in Ireland: 0

Count of 10km squares in the Channel Isles: 0

Plantatt Conservation Status

Vulnerable

JNCC Designations

NBNSYS0000002153