📍 R5: A10 Bridge Hay Lane

River: Rib Catchment: Upper Lea (Hertfordshire) Filter(s): 138

Your Site at a Glance

216
Species Detected
168
Genera Identified
100
Families Found
899,935
DNA Sequences

How Your Site Compares

Metric Your Site Rib Average Study Average
Species 216 160 206
Genera 168 123 151
Families 100 72 83
EPT Families 9 5 6

Rank 1 of 9 on Rib Rank 41 of 81 in study

🌊 Water Quality Indicators

Good

BMWP score: 129 (Very Good) — ASPT score: 5.9 (Good)

22 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)
41 (19.0%)
2. Naididae (Aquatic Oligochaetes)
19 (8.8%)
3. Lumbricidae (Common Earthworms)
8 (3.7%)
4. Staphylinidae (Rove Beetles)
6 (2.8%)
5. Simuliidae (Black Flies)
6 (2.8%)
6. Tipulidae (Crane Flies)
5 (2.3%)
7. Cyprinidae (Carp and Allies)
5 (2.3%)
8. Ectopsocidae (Ectopsocid Barklice)
4 (1.9%)
9. Cicadellidae (Leafhoppers)
4 (1.9%)
10. Enchytraeidae (Potworms)
3 (1.4%)
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
19/33 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

10 fish species detected (6 families, 62 ESVs)
SpeciesFamilyESVs
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 9
Phoxinus phoxinus (Minnow) Cyprinidae 8
Salmo trutta (Brown Trout / Sea Trout) Salmonidae 5
Cottus bairdii Cottidae 3
Barbatula barbatula (Stone Loach) Nemacheilidae 3
Potamorrhaphis guianensis Belonidae 1
Phoxinus colchicus Cyprinidae 1
Leuciscus leuciscus (Dace) Cyprinidae 1
Gobio muresius Cyprinidae 1
Squalius cephalus (Chub) Cyprinidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

13 EPT species detected (9 families, 31 ESVs — E:5 / P:3 / T:5)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Serratella ignita (Blue Winged Olive) Ephemerellidae 5
Baetis rhodani (Large Dark Olive) Baetidae 2
Baetis vernus (Medium Olive) Baetidae 2
Ephemera danica (The Mayfly) Ephemeridae 2
Centroptilum luteolum (Small Spurwing) Baetidae 1
Plecoptera (Stoneflies)
Leuctra fusca (Late Needle Fly) Leuctridae 7
Nemurella pictetii (Pictet's Stonefly) Nemouridae 2
Leuctra digitata (Rolled-winged Stoneflies) Leuctridae 1
Trichoptera (Caddisflies)
Limnephilus extricatus (Northern Caddisflies) Limnephilidae 3
Silo nigricornis (Humpless Case-maker Caddisflies) Goeridae 2
Glyphotaelius pellucidus (Northern Caddisflies) Limnephilidae 2
Crunoecia irrorata (Lepidostomatid Caddisflies) Lepidostomatidae 1
Lype phaeopa (Tube-case Caddisflies) Psychomyiidae 1

🔗 Your Ecological Twin

Most similar site: R4 - Westmill below south bridge
River: Rib (same river)
Similarity: 40% of species shared
Download Data

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

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