📍 MM7: Digswell Park Road

River: Mimram Catchment: Upper Lea (Hertfordshire) Filter(s): 131

Your Site at a Glance

204
Species Detected
155
Genera Identified
79
Families Found
481,418
DNA Sequences

How Your Site Compares

Metric Your Site Mimram Average Study Average
Species 204 204 206
Genera 155 151 151
Families 79 77 83
EPT Families 8 8 6

Rank 6 of 10 on Mimram Rank 46 of 81 in study

🌊 Water Quality Indicators

Very Good

BMWP score: 111 (Very Good) — ASPT score: 6.2 (Excellent)

18 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)
37 (18.1%)
2. Naididae (Aquatic Oligochaetes)
35 (17.2%)
3. Lumbricidae (Common Earthworms)
9 (4.4%)
4. Enchytraeidae (Potworms)
7 (3.4%)
5. Anatidae (Ducks, Geese, and Swans)
6 (2.9%)
6. Chydoridae (Chydorid Water Fleas)
4 (2.0%)
7. Cyclopidae (Cyclopoid Copepods)
4 (2.0%)
8. Muridae (Old World Mice and Rats)
4 (2.0%)
9. Hydridae (Freshwater Hydras)
4 (2.0%)
10. Limoniidae (Limoniid Crane 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
18/33 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

5 fish species detected (6 families, 29 ESVs)
SpeciesFamilyESVs
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 5
Salmo trutta (Brown Trout / Sea Trout) Salmonidae 5
Barbatula barbatula (Stone Loach) Nemacheilidae 4
Potamorrhaphis guianensis Belonidae 1
Cottus bairdii Cottidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

11 EPT species detected (8 families, 17 ESVs — E:5 / P:2 / T:4)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Baetis rhodani (Large Dark Olive) Baetidae 2
Baetis vernus (Medium Olive) Baetidae 1
Cloeon dipterum (Pond Olive) Baetidae 1
Serratella ignita (Blue Winged Olive) Ephemerellidae 1
Paraleptophlebia submarginata (Turkey Brown) Leptophlebiidae 1
Plecoptera (Stoneflies)
Isoperla grammatica (Yellow Sally) Perlodidae 2
Nemurella pictetii (Pictet's Stonefly) Nemouridae 1
Trichoptera (Caddisflies)
Glyphotaelius pellucidus (Northern Caddisflies) Limnephilidae 4
Sericostoma personatum (Sericostomatid Caddisflies) Sericostomatidae 2
Halesus radiatus (Northern Caddisflies) Limnephilidae 1
Rhyacophila dorsalis (Free-living Caddisflies) Rhyacophilidae 1

🔗 Your Ecological Twin

Most similar site: MM6B - Sherrardswood
River: Mimram (same river)
Similarity: 53% of species shared
Download Data

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

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