Schoenoplectus lacustris
Ecology
A tall rhizomatous perennial herb of standing or flowing fresh water, in conditions ranging from eutrophic and base-rich to oligotrophic and base-poor. Substrates include silt, clay, peat or gravel. It occurs in ponds, lakes, canals, dykes and slow moving rivers, usually in water 0.3-1.5 m deep, but can also be found in deeper water. Generally lowland, but reaching 405 m at Dock Tarn (Cumberland).
Status
Trends
The distribution of S. lacustris is very similar to that shown in the 1962 Atlas, where it was mapped as `all records`, but there have been local losses in S.E. England.
World Distribution
Eurosiberian Wide-temperate element.
Broad Habitats
Light (Ellenberg): 8
Moisture (Ellenberg): 11
Reaction (Ellenberg): 7
Nitrogen (Ellenberg): 6
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.7
July Mean Temperature (Celsius): 14.9
Annual Precipitation (mm): 1013
Length: 210
Perennation - primary
Life Form - primary
Woodiness
Clonality - primary
Count of 10km squares in Great Britain: 1202
Count of 10km squares in Ireland: 535
Count of 10km squares in the Channel Isles: 0
Atlas Change Index: 0.47
Weighted Changed Factor: 0
Weighted Change Factor Confidence (90%)
JNCC Designations
Atlas text references
Atlas (348d)
.
1986. Atlas of north European vascular plants north of the Tropic of Cancer. 3 vols.
.
1997. Aquatic plants in Britain and Ireland.