📍 R9: Wadesmill - Old Church Lane

River: Rib Catchment: Upper Lea (Hertfordshire) Filter(s): 141

Your Site at a Glance

203
Species Detected
153
Genera Identified
91
Families Found
523,443
DNA Sequences

How Your Site Compares

Metric Your Site Rib Average Study Average
Species 203 160 206
Genera 153 123 151
Families 91 72 83
EPT Families 8 5 6

Rank 2 of 9 on Rib Rank 47 of 81 in study

🌊 Water Quality Indicators

Very Good

BMWP score: 135 (Very Good) — ASPT score: 6.1 (Excellent)

22 scoring macroinvertebrate families detected

Near-natural conditions with an unpolluted, diverse macroinvertebrate community.

🔍 Notable Findings

Conservation Species:

Invasive Species:

🦋 Top 10 Families at Your Site

1. Chironomidae (Non-biting Midges)
51 (25.1%)
2. Naididae (Aquatic Oligochaetes)
21 (10.3%)
3. Lumbricidae (Common Earthworms)
6 (3.0%)
4. Simuliidae (Black Flies)
6 (3.0%)
5. Ectopsocidae (Ectopsocid Barklice)
4 (2.0%)
6. Lumbriculidae (Aquatic Earthworms)
3 (1.5%)
7. Enchytraeidae (Potworms)
3 (1.5%)
8. Pediciidae (Hairy Crane Flies)
3 (1.5%)
9. Limnephilidae (Northern Caddisflies)
3 (1.5%)
10. Empididae (Dance Flies)
3 (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
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

7 fish species detected (6 families, 33 ESVs)
SpeciesFamilyESVs
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 4
Squalius cephalus (Chub) Cyprinidae 3
Phoxinus phoxinus (Minnow) Cyprinidae 3
Barbatula barbatula (Stone Loach) Nemacheilidae 3
Salmo trutta (Brown Trout / Sea Trout) Salmonidae 3
Potamorrhaphis guianensis Belonidae 2
Cottus bairdii Cottidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

13 EPT species detected (9 families, 23 ESVs — E:5 / P:3 / T:5)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Paraleptophlebia submarginata (Turkey Brown) Leptophlebiidae 6
Ephemera danica (The Mayfly) Ephemeridae 3
Baetis rhodani (Large Dark Olive) Baetidae 2
Baetis scambus (Small Dark Olive) Baetidae 1
Habrophlebia fusca (Ditch Dun) Leptophlebiidae 1
Plecoptera (Stoneflies)
Leuctra digitata (Rolled-winged Stoneflies) Leuctridae 1
Leuctra fusca (Late Needle Fly) Leuctridae 1
Nemurella pictetii (Pictet's Stonefly) Nemouridae 1
Trichoptera (Caddisflies)
Glyphotaelius pellucidus (Northern Caddisflies) Limnephilidae 2
Silo nigricornis (Humpless Case-maker Caddisflies) Goeridae 1
Halesus radiatus (Northern Caddisflies) Limnephilidae 1
Limnephilus extricatus (Northern Caddisflies) Limnephilidae 1
Notidobia ciliaris (Sericostomatid Caddisflies) Sericostomatidae 1

🔗 Your Ecological Twin

Most similar site: A9 - Watersplace Farm
River: Ash (different river)
Similarity: 45% of species shared
Download Data

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

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