📍 R10: Bengeo (downstream site)

River: Rib Catchment: Upper Lea (Hertfordshire) Filter(s): 42

Your Site at a Glance

66
Species Detected
57
Genera Identified
35
Families Found
359,828
DNA Sequences

How Your Site Compares

Metric Your Site Rib Average Study Average
Species 66 160 206
Genera 57 123 151
Families 35 72 83
EPT Families 6 5 6

Rank 9 of 9 on Rib Rank 76 of 81 in study

🌊 Water Quality Indicators

Good

BMWP score: 71 (Good) — ASPT score: 6.5 (Excellent)

11 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)
20 (30.3%)
2. Cyprinidae (Carp and Allies)
6 (9.1%)
3. Naididae (Aquatic Oligochaetes)
4 (6.1%)
4. Simuliidae (Black Flies)
3 (4.5%)
5. Cyclopidae (Cyclopoid Copepods)
2 (3.0%)
6. Salmonidae (Salmon and Trout)
2 (3.0%)
7. Erpobdellidae (Jawless Leeches)
1 (1.5%)
8. Lumbricidae (Common Earthworms)
1 (1.5%)
9. Julidae (Cylindrical Millipedes)
1 (1.5%)
10. Coccinellidae (Ladybird Beetles)
1 (1.5%)
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
15/33 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

11 fish species detected (5 families, 66 ESVs)
SpeciesFamilyESVs
Gobio gobio (Gudgeon) Cyprinidae 8
Squalius cephalus (Chub) Cyprinidae 6
Phoxinus phoxinus (Minnow) Cyprinidae 6
Leuciscus leuciscus (Dace) Cyprinidae 5
Cottus bairdii Cottidae 3
Salmo trutta (Brown Trout / Sea Trout) Salmonidae 2
Trachurus lathami Carangidae 1
Rutilus frisii Cyprinidae 1
Gobio kovatschevi Cyprinidae 1
Barbatula barbatula (Stone Loach) Nemacheilidae 1
Oncorhynchus gorbuscha (Pink Salmon) Salmonidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

6 EPT species detected (6 families, 8 ESVs — E:4 / P:0 / T:2)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Ephemera danica (The Mayfly) Ephemeridae 2
Baetis rhodani (Large Dark Olive) Baetidae 1
Caenis luctuosa (Angler's Curse) Caenidae 1
Paraleptophlebia submarginata (Turkey Brown) Leptophlebiidae 1
Trichoptera (Caddisflies)
Glyphotaelius pellucidus (Northern Caddisflies) Limnephilidae 2
Silo nigricornis (Humpless Case-maker Caddisflies) Goeridae 1

🔗 Your Ecological Twin

Most similar site: A10 - Holycross road (downstream site)
River: Ash (different river)
Similarity: 27% of species shared
Download Data

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

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