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Juncus maritimus

Tracheophyta ›Magnoliopsida›Juncaceae›Juncus›Juncus maritimus

Ecology

A rhizomatous, clump-forming perennial herb of saltmarshes and saline dune-slacks. It also occurs in areas subject to freshwater seepage on low, exposed rocky cliff-tops and stony sea-loch shores. It is tolerant of a wide range of salinities and soil moisture, occurring at all levels in saltmarshes and in both silty and sandy substrates. Lowland.

Status

Native

Trends

J. maritimus has been lost since the 1962 Atlas from a number of sites on the S. and E. coasts of England, but the distribution is stable elsewhere.

World Distribution

European Southern-temperate element; widely naturalised outside its native range.

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Broad Habitats

Littoral sediment (includes saltmarsh and saltmarsh pools)

Light (Ellenberg): 8

Moisture (Ellenberg): 8

Reaction (Ellenberg): 8

Nitrogen (Ellenberg): 5

Salt Tolerance (Ellenberg): 5

January Mean Temperature (Celsius): 4.7

July Mean Temperature (Celsius): 15.1

Annual Precipitation (mm): 1081

Height (cm): 100

Perennation - primary

Perennial

Life Form - primary

Non-bulbous geophyte (rhizome, corm or tuber)

Woodiness

Herbaceous

Clonality - primary

Tussock-forming graminoid, may slowly spread

Count of 10km squares in Great Britain: 390

Count of 10km squares in Ireland: 196

Count of 10km squares in the Channel Isles: 11

Atlas Change Index: -0.26

Weighted Changed Factor: 5

Weighted Change Factor Confidence (90%)

13

JNCC Designations

NBNSYS0000002226