📍 MM10B: Panshanger (downstream site)

River: Mimram Catchment: Upper Lea (Hertfordshire) Filter(s): 76

Your Site at a Glance

173
Species Detected
130
Genera Identified
74
Families Found
465,482
DNA Sequences

How Your Site Compares

Metric Your Site Mimram Average Study Average
Species 173 204 206
Genera 130 151 151
Families 74 77 83
EPT Families 9 8 6

Rank 9 of 10 on Mimram Rank 54 of 81 in study

🌊 Water Quality Indicators

Very Good

BMWP score: 141 (Very Good) — ASPT score: 6.4 (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)
43 (24.9%)
2. Naididae (Aquatic Oligochaetes)
25 (14.5%)
3. Anatidae (Ducks, Geese, and Swans)
8 (4.6%)
4. Baetidae (Small Mayflies)
4 (2.3%)
5. Simuliidae (Black Flies)
4 (2.3%)
6. Ectopsocidae (Ectopsocid Barklice)
4 (2.3%)
7. Cyclopidae (Cyclopoid Copepods)
3 (1.7%)
8. Chydoridae (Chydorid Water Fleas)
3 (1.7%)
9. Hydridae (Freshwater Hydras)
3 (1.7%)
10. Tenthredinidae (Sawflies)
2 (1.2%)
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
20/33 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 (5 families, 58 ESVs)
SpeciesFamilyESVs
Thymallus aeliani Salmonidae 6
Salmo trutta (Brown Trout / Sea Trout) Salmonidae 6
Phoxinus phoxinus (Minnow) Cyprinidae 5
Barbatula barbatula (Stone Loach) Nemacheilidae 5
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 5
Cottus bairdii Cottidae 4
Leuciscus leuciscus (Dace) Cyprinidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

13 EPT species detected (9 families, 28 ESVs — E:7 / P:2 / T:4)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Cloeon dipterum (Pond Olive) Baetidae 4
Baetis rhodani (Large Dark Olive) Baetidae 3
Baetis vernus (Medium Olive) Baetidae 2
Serratella ignita (Blue Winged Olive) Ephemerellidae 2
Paraleptophlebia submarginata (Turkey Brown) Leptophlebiidae 2
Baetis scambus (Small Dark Olive) Baetidae 1
Ephemera danica (The Mayfly) Ephemeridae 1
Plecoptera (Stoneflies)
Leuctra fusca (Late Needle Fly) Leuctridae 3
Isoperla grammatica (Yellow Sally) Perlodidae 3
Trichoptera (Caddisflies)
Silo nigricornis (Humpless Case-maker Caddisflies) Goeridae 2
Athripsodes albifrons (Long-horned Caddisflies) Leptoceridae 2
Glyphotaelius pellucidus (Northern Caddisflies) Limnephilidae 2
Drusus annulatus (Northern Caddisflies) Limnephilidae 1

🔗 Your Ecological Twin

Most similar site: M8 - over the Misbourne
River: Misbourne (different river)
Similarity: 36% of species shared
Download Data

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

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