A303 Bridge – 2017
These results are taken from kick sampling conducted beneath the bridge where the A303 Wincanton Bypass crosses the river Cale; UK grid reference ST71100 27786.
Date | January | February | March | April | ||||
Target Groups | Number | Category | Number | Category | Number | Category | Number | Category |
Cased caddis | a | 3 | a | |||||
Caseless caddis | a | 2 | a | |||||
Mayflies | a | |||||||
Blue-winged olives | a | 5 | a | |||||
Flat-bodies | ||||||||
Olives | a | 20 | b | |||||
Stoneflies | a | 1 | a | |||||
Freshwater shrimp | b | 17 | b | |||||
Site score | 8 | 8 | ||||||
Notes | ||||||||
Invasive Species | ||||||||
American signal crayfish | NO | YES | NO | NO | ||||
Himalayan balsam | NO | NO | NO | NO | ||||
Japanese knotweed | NO | NO | NO | NO | ||||
Giant hogweed | NO | NO | NO | NO | ||||
Floating pennywort | NO | NO | NO | NO | ||||
American skunk cabbage | NO | NO | NO | NO | ||||
Other species noted | Bullhead, leeches, limpets | Bullhead, water snails, limpets | ||||||
River depth close | cm | 10cm | cm | cm | ||||
River depth middle | cm | 15cm | cm | cm | ||||
River depth far | cm | 15cm | cm | cm |