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Biological Monitoring Working Party
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| Introduction |
BMWP scores for the locations sampled by S.O.C.S. can be viewed below: |
| River Ouse |
| East Mascalls |
| Scaynes Hill - Main river |
| Scaynes Hill - Canal Cut |
| Sheffield Park |
| Barcombe Mills |
| Bevern Stream |
| Stoneywish Country Park |
| Spatham Lane |
| Streat Lane |
| Swansyard Farm |
| Holmans railway bridge |
| Clapper's Bridge |
| North End Stream |
| Cooksbridge |
| Hamsey Road |
| Plumpton Mill Stream |
| Plumpton Mill |
| Ferrings Bridge |
| Longford Stream |
| Cinder Hill, Chailey |
| Ridgelands Lane - Newick |
| Longford Bridge |
| Great Bentley Stream |
| Brook Street, Cuckfield |
| Shortbridge Stream |
| Maresfield, Underhill |
| Shortbridge |
| Norlington Stream |
| Wellingham Lane |
| Bevern Stream, downstream from Clapper's Bridge, Barcombe | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| This sample was taken 1/2 km downstream from where we perform chemical tests each month on the quality of the water. This is the nearest place downstream from Clapper's Bridge with suitable depth and flow of water for carrying out a kick sample. We intend to carry out biological tests at this site on a regular basis to monitor the long term effects that water quality has on invertebrate life in the stream. See the latest water quality test results for this location... November 2007A BMWP Score of 61 is rated as fair biological quality and the ASPT also as fair. This is an almost identical result to the test taken in October 07 and probably reflects the results of the recent spillage of sewage but it should be noted that biodiversity is reduced by the dominance of strong competitors like the hydropsychid net-spinning caddis larvae.
A similar result to last year, again with quite a wide range of organisms captured, but lacking in pollution sensitive families. |
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| Location | Bevern Stream –Clappers Weir , Barcombe. | |
| Date | 4th April 2007 | |
| Grid Reference | TQ424161 | |
| Notes | Sample taken downstream from weir sill – mixed clay/gravel substrate – moderate flow. |
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| Also netted in this sample. | Planorbis shell |
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| Species | Group | BMWP Score |
| Ephemeridae | Mayfly | 10 |
| Calopterygidae | Damselfly | 8 |
| Caenidae | Mayfly | 7 |
| Gammaridae | Shrimp | 6 |
| Ancylidae | Snail | 6 |
| Hydropsychidae | Caddis Fly (caseless) | 5 |
| Elminthidae | Water beetle (adult and larvae) | 5 |
| Dytiscidae | Diving beetle (larva) |
5 |
| Simuliidae | Blackfly larvae | 5 |
| Baetidae | Mayfly | 4 |
| Sphaeriidae | Mussel | 3 |
| Lymnaeidae | Spireshell snail | 3 |
| Chironomidae | Midge larvae (Chironomus) | 2 |
| Oligochaeta | Worm - Tubifex and Lumbriculus | 1 |
| Total Score | 70 | |
| ASPT (Average Score Per Taxon) | 5.0 | |
April 2006
A fairly wide variety of organisms were captured, but lacking in pollution sensitive families, giving low scores on both the BMWP total and the Average Score Per Taxon. This maybe related to recent high levels of ammonia measured at this location.| Location | Bevern Stream –Clappers Weir , Barcombe. | |
| Date | 7th April 2006 | |
| Grid Reference | TQ424161 | |
| Notes | Sample taken downstream from weir sill – mixed clay/gravel substrate – moderate flow. |
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| Also netted in this sample. | 1 Bullhead Culicidae – mosquito larvae |
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| Species | Group | BMWP Score |
| Ephemerellidae | Mayfly | 10 |
| Gammaridae | Shrimp | 6 |
| Hydropsychidae | Caddis Fly (caseless) | 5 |
| Elminthidae | Water beetle (adult and larvae) | 5 |
| Dytiscidae | Diving beetle (Platambus maculatus) |
5 |
| Simuliidae | Blackfly larvae | 5 |
| Tipulidae | Cranefly larvae | 5 |
| Baetidae | Mayfly | 4 |
| Glossiphoniidae | Leech | 3 |
| Sphaerium | Mussel | 3 |
| Planorbiidae | Snail | 3 |
| Physidae | Snail | 3 |
| Lymnaeidae | Spireshell snail | 3 |
| Asellidae | Hoglouse | 3 |
| Chironomidae | Midge larvae (Chironomus) | 2 |
| Oligochaeta | Segmented worm (Lumbriculus) | 1 |
| Total Score | 66 | |
| ASPT (Average Score Per Taxon) | 4.1 | |
July 2005
| Location | Bevern Stream –opposite Scobells Farm, Barcombe. | |
| Date | 20th July 2005 | |
| Grid Reference | TQ425163 | |
| Notes | Moderate to slow flow rate. Partly shaded. Gravel substrate | |
| Also netted in this sample. | - | |
| Species | Group | BMWP Score |
| Ephemeridae | Mayfly | 10 |
| Ephemerellidae | Mayfly | 10 |
| Leptoceridae | Caddis Fly | 10 |
| Limnephilidae | Caddis Fly | 7 |
| Gammaridae | Shrimp | 6 |
| Hydropsychidae | Caddis Fly | 5 |
| Elminthidae | Water beetle | 5 |
| Tipulidae | Cranefly | 5 |
| Simuliidae | Blackfly | 5 |
| Baetidae | Mayfly | 4 |
| Glossiphoniidae | Leech | 3 |
| Limnaea | Snail | 3 |
| Physidae | Mussel | 3 |
| Hydracarina | Water mite | 0 |
| Total Score | 76 | |
| ASPT (Average Score Per Taxon) | 5.8 | |
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