GeneFlow eDNA Biodiversity Survey
Chalk stream invertebrate biodiversity monitoring using environmental DNA
11
Rivers Surveyed
81
Sampling Sites
16,684
Total ESVs Detected
556
Max Species at Site
Full Study Report
Comprehensive analysis of all rivers and sites with key findings and recommendations
View Master ReportRiver Reports
Site Reports
| Site Code | Site Name | River | ESVs | Species | EPT Families |
|---|---|---|---|---|---|
| A4 | Malting Lane (upstream site) | Ash | 302 | 301 | 7 |
| A7 | Hoghams | Ash | 249 | 248 | 9 |
| A6 | Widford STW Upstream | Ash | 242 | 242 | 10 |
| A9 | Watersplace Farm | Ash | 215 | 214 | 11 |
| A8 | Watersplace US | Ash | 205 | 205 | 11 |
| A5 | Hadham Mill | Ash | 131 | 131 | 8 |
| A10 | Holycross road (downstream site) | Ash | 131 | 131 | 7 |
| B8 | Woodhall lower | Beane | 557 | 556 | 12 |
| B9 | Stapleford Church | Beane | 417 | 416 | 8 |
| B4 | Frogmore Hall - Rookery | Beane | 362 | 362 | 2 |
| B2 | Walkern - Greenway | Beane | 294 | 294 | 8 |
| B6 | Woodall Estate | Beane | 282 | 282 | 8 |
| B3 | Aston End (Aston Ford) | Beane | 274 | 273 | 3 |
| B1B | Walkern Ford (upstream site) | Beane | 165 | 165 | 2 |
| B1A | Newell Lane (extra site) | Beane | 140 | 140 | 1 |
| B5 | Watton Lamas Control (upriver) (Lammas U... | Beane | 133 | 133 | 4 |
| B10 | Waterford Marsh (downstream site) | Beane | 57 | 56 | 5 |
| E1B | parallel channel near source (winterbour... | Channel | 259 | 258 | 6 |
| C6 | Chenies | Chess | 301 | 300 | 8 |
| C3 | Broadwater Bridge | Chess | 257 | 255 | 5 |
| C9 | Scotsbridge Mill | Chess | 254 | 254 | 10 |
| C8 | Loudwater (trout rise) | Chess | 244 | 243 | 8 |
| C7 | Chorley Wood pump | Chess | 232 | 231 | 6 |
| C4 | Marsh Field | Chess | 226 | 226 | 8 |
| C10 | Elms below lake inlet (downstream site) | Chess | 177 | 177 | 7 |
| C2 | Upstream Chesham Moor on main channel (2... | Chess | 171 | 170 | 4 |
| C1 | Queens Head (upstream site) | Chess | 82 | 82 | 3 |
| C5 | Latimer Bridge | Chess | 23 | 23 | 2 |
| E6 | Brook Street | Ewelme Brook | 264 | 263 | 8 |
| E5 | Braze Lane | Ewelme Brook | 243 | 243 | 11 |
| E3 | Ewelme Mill | Ewelme Brook | 228 | 228 | 6 |
| E7 | Millbrook Mead (downstream site) | Ewelme Brook | 124 | 124 | 1 |
| E2 | Watercress Centre | Ewelme Brook | 115 | 115 | 6 |
| E1A | King's Pool: Ewelme (upstream site) | Ewelme Brook | 67 | 67 | 4 |
| H6 | Colstrope I | Hamble Brook | 168 | 168 | 7 |
| H10 | Bridge east of Mill End Car Park (downst... | Hamble Brook | 143 | 142 | 6 |
| H5 | Upstream Colstrope Farm | Hamble Brook | 137 | 137 | 7 |
| H4 | downstream Arizona Farm (upstream site) | Hamble Brook | 86 | 86 | 5 |
| H7 | Pheasant's Hill | Hamble Brook | 17 | 17 | 1 |
| U7 | Mill Green | Lea | 305 | 305 | 6 |
| U3 | Meads (Wheathampstead) | Lea | 293 | 292 | 5 |
| U6 | Stanborough South | Lea | 277 | 277 | 8 |
| U8 | Waterhall Farm | Lea | 275 | 274 | 11 |
| U5 | Lemsford Village | Lea | 269 | 269 | 5 |
| U10 | Gaunts (downstream of Amwell Magna Fishi... | Lea | 265 | 265 | 8 |
| U4 | Waterend Lane | Lea | 260 | 260 | 4 |
| U2 | Batford Springs | Lea | 233 | 233 | 5 |
| U1B | East Hyde | Lea | 208 | 207 | 4 |
| U1A | Manor Road Park (upstream site) | Lea | 121 | 121 | 1 |
| MM8 | Tewinbury Farm | Mimram | 292 | 292 | 12 |
| MM10A | Panshanger Div. Chan. 2 | Mimram | 272 | 272 | 13 |
| MM9 | Archer’s Green | Mimram | 263 | 262 | 11 |
| MM6A | Welwyn Allotments | Mimram | 242 | 241 | 8 |
| MM6B | Sherrardswood | Mimram | 209 | 209 | 7 |
| MM7 | Digswell Park Road | Mimram | 204 | 204 | 8 |
| MM3 | Kimpton Mill (upstream site) | Mimram | 181 | 181 | 6 |
| MM5 | Singlers Marsh (S. End) | Mimram | 176 | 176 | 5 |
| MM10B | Panshanger (downstream site) | Mimram | 173 | 172 | 9 |
| MM4 | Codicote Bottom | Mimram | 33 | 33 | 2 |
| M6 | Chalfont St Giles | Misbourne | 341 | 340 | 4 |
| M5 | Bottom House Farm | Misbourne | 295 | 295 | 5 |
| M10 | Denham Country Park (downstream site) | Misbourne | 267 | 266 | 11 |
| M4 | Quarrendon Mill | Misbourne | 265 | 265 | 8 |
| M2 | Mop End | Misbourne | 254 | 253 | 9 |
| M9 | Higher Denham | Misbourne | 240 | 240 | 6 |
| M8 | over the Misbourne | Misbourne | 233 | 232 | 9 |
| M3 | Shardeloes | Misbourne | 227 | 226 | 6 |
| M1 | Doctors Meadows (upstream site) | Misbourne | 216 | 215 | 4 |
| M7 | Chalfont St Peter Community Centre | Misbourne | 42 | 42 | 3 |
| R5 | A10 Bridge Hay Lane | Rib | 216 | 215 | 9 |
| R9 | Wadesmill - Old Church Lane | Rib | 203 | 202 | 8 |
| R7 | Standon A120 Road Bridge | Rib | 198 | 197 | 9 |
| R1 | River Green (Buntingford) | Rib | 183 | 183 | 2 |
| R4 | Westmill below south bridge | Rib | 174 | 172 | 3 |
| R8 | Cold Christmas | Rib | 157 | 157 | 8 |
| R3 | Aspenden Road Bridge (Buntingford) | Rib | 150 | 149 | 2 |
| R2 | Buntingford Watermill (upstream site) | Rib | 96 | 96 | 2 |
| R10 | Bengeo (downstream site) | Rib | 66 | 66 | 6 |
| S1 | Bridge opposite Dunelm (upstream site) | Stevenage Brook | 135 | 135 | 3 |
| S3 | Frogmore Hall (downstream site) | Stevenage Brook | 119 | 118 | 5 |
| S2 | Wychdell Flood Storage Reservoir | Stevenage Brook | 82 | 82 | 2 |
