📍 B2: Walkern - Greenway

River: Beane Catchment: Upper Lea (Hertfordshire) Filter(s): 118

Your Site at a Glance

294
Species Detected
217
Genera Identified
120
Families Found
562,962
DNA Sequences

How Your Site Compares

Metric Your Site Beane Average Study Average
Species 294 268 206
Genera 217 193 151
Families 120 103 83
EPT Families 8 5 6

Rank 4 of 10 on Beane Rank 9 of 81 in study

🌊 Water Quality Indicators

Good

BMWP score: 116 (Very Good) — ASPT score: 5.5 (Good)

21 scoring macroinvertebrate families detected

Clean water with slight impacts; a healthy community of macroinvertebrate families is present.

🔍 Notable Findings

Conservation Species:

Invasive Species:

🦋 Top 10 Families at Your Site

1. Chironomidae (Non-biting Midges)
46 (15.6%)
2. Naididae (Aquatic Oligochaetes)
31 (10.5%)
3. Lumbricidae (Common Earthworms)
12 (4.1%)
4. Enchytraeidae (Potworms)
10 (3.4%)
5. Tipulidae (Crane Flies)
8 (2.7%)
6. Syrphidae (Hoverflies)
7 (2.4%)
7. Limoniidae (Limoniid Crane Flies)
6 (2.0%)
8. Cicadellidae (Leafhoppers)
6 (2.0%)
9. Simuliidae (Black Flies)
5 (1.7%)
10. Psychodidae (Moth Flies)
5 (1.7%)
Taxonomic composition

🪲 Extended Riverfly Taxa

1 Flatworms 18Dragonflies and Damselflies
2 Freshwater Snails 19Water Boatmen
3 Limpets 20Other Water Bugs
4 Bivalves 21Water Beetles
5 Aquatic Worms 22Alderflies
6 Leeches 23Caseless Caddisflies - Green Sedge
7 Crayfish 24Caseless Caddisflies - Net Spinners
8 Water Hoglouse 25Caseless Caddisflies - Non-Gilled
9 Freshwater Shrimps 26Cased Caddisflies - Hood Case-Maker
10 Invasive Non-Native Shrimps 27Cased Caddisflies - Weighted Case-Maker
11 Mayflies - Angler's Curse 28Cased Caddisflies - Bush Tailed Caddisfly
12 Mayflies - Olives 29Cased Caddisflies - Other
13 Mayflies - Prong Gilled 30Craneflies
14 Mayflies - Flatbodied 31Blackflies
15 Mayflies - Green Drake 32Non-Biting Midges
16 Mayflies - Blue-Winged Olive 33Water Snipe Flies
17 Stoneflies
22/33 Extended Riverfly taxa detected

Note: The Extended Riverfly Monitoring Initiative calculates scores based on abundance categories, which cannot be determined from eDNA presence/absence data. This checklist shows which taxa groups were detected but does not constitute an official ARMI score.

🐟 Fish Species

4 fish species detected (5 families, 23 ESVs)
SpeciesFamilyESVs
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 5
Barbatula barbatula (Stone Loach) Nemacheilidae 3
Rutilus frisii Cyprinidae 1
Cottus bairdii Cottidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

14 EPT species detected (9 families, 24 ESVs — E:4 / P:0 / T:10)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Baetis rhodani (Large Dark Olive) Baetidae 2
Baetis scambus (Small Dark Olive) Baetidae 1
Cloeon dipterum (Pond Olive) Baetidae 1
Serratella ignita (Blue Winged Olive) Ephemerellidae 1
Trichoptera (Caddisflies)
Glyphotaelius pellucidus (Northern Caddisflies) Limnephilidae 5
Limnephilus extricatus (Northern Caddisflies) Limnephilidae 2
Agapetus fuscipes (Saddle-case Makers) Glossosomatidae 1
Silo nigricornis (Humpless Case-maker Caddisflies) Goeridae 1
Hydroptila vectis (Microcaddisflies) Hydroptilidae 1
Leptocerus tineiformis (Long-horned Caddisflies) Leptoceridae 1
Limnephilus flavicornis (Northern Caddisflies) Limnephilidae 1
Limnephilus marmoratus (Northern Caddisflies) Limnephilidae 1
Micropterna lateralis (Northern Caddisflies) Limnephilidae 1
Rhyacophila dorsalis (Free-living Caddisflies) Rhyacophilidae 1

🔗 Your Ecological Twin

Most similar site: E1B - parallel channel near source (winterbourne)
River: Channel (different river)
Similarity: 33% of species shared
Download Data

294 Species detected at this site — CSV format, opens in Excel

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