Senecio aquaticus
Tracheophyta
›Magnoliopsida›Asteraceae›Senecio›Senecio aquaticus
Ecology
A biennial, sometimes perennial, herb occurring in marshes, wet meadows, rush-pastures, and by streams, ponds and ditches. Generally lowland, but reaching 460 m in Weardale (Co. Durham) and in Co. Wicklow.
Status
Native
Trends
This species was mapped as `all records` in the 1962 Atlas. There has been widespread decline in S. and E. England, and analysis of the database reveals that most losses have occurred since 1950. The decline is probably due to drainage of wet meadows and agricultural intensification.
World Distribution
European Temperate element.
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Broad Habitats
Light (Ellenberg): 7
Moisture (Ellenberg): 8
Reaction (Ellenberg): 6
Nitrogen (Ellenberg): 5
Salt Tolerance (Ellenberg): 0
January Mean Temperature (Celsius): 3.6
July Mean Temperature (Celsius): 14.5
Annual Precipitation (mm): 1109
Height (cm): 80
Perennation - primary
Biennial, including monocarpic perennials
Perennation - secondary
Perennial
Life Form - primary
Hemicryptophyte
Woodiness
Herbaceous
Clonality - primary
Little or no vegetative spread
Count of 10km squares in Great Britain: 2304
Count of 10km squares in Ireland: 919
Count of 10km squares in the Channel Isles: 1
Atlas Change Index: -0.92
Weighted Changed Factor: -22
Weighted Change Factor Confidence (90%)
17
JNCC Designations
NBNSYS0000004365
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