📍 B10: Waterford Marsh (downstream site)

River: Beane Catchment: Upper Lea (Hertfordshire) Filter(s): 27

Your Site at a Glance

57
Species Detected
49
Genera Identified
37
Families Found
229,051
DNA Sequences

How Your Site Compares

Metric Your Site Beane Average Study Average
Species 57 268 206
Genera 49 193 151
Families 37 103 83
EPT Families 5 5 6

Rank 10 of 10 on Beane Rank 77 of 81 in study

🌊 Water Quality Indicators

Good

BMWP score: 80 (Good) — ASPT score: 6.7 (Excellent)

12 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)
12 (21.1%)
2. Naididae (Aquatic Oligochaetes)
6 (10.5%)
3. Nemacheilidae (Stone Loaches)
2 (3.5%)
4. Elmidae (Riffle Beetles)
2 (3.5%)
5. Baetidae (Small Mayflies)
2 (3.5%)
6. Hydridae (Freshwater Hydras)
2 (3.5%)
7. Julidae (Cylindrical Millipedes)
1 (1.8%)
8. Lumbriculidae (Aquatic Earthworms)
1 (1.8%)
9. Lumbricidae (Common Earthworms)
1 (1.8%)
10. Dytiscidae (Diving Beetles)
1 (1.8%)
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
13/33 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, 17 ESVs)
SpeciesFamilyESVs
Phoxinus phoxinus (Minnow) Cyprinidae 4
Cottus bairdii Cottidae 3
Barbatula barbatula (Stone Loach) Nemacheilidae 3
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 2
Salmo trutta (Brown Trout / Sea Trout) Salmonidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

6 EPT species detected (5 families, 15 ESVs — E:5 / P:0 / T:1)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Serratella ignita (Blue Winged Olive) Ephemerellidae 6
Ephemera danica (The Mayfly) Ephemeridae 3
Baetis rhodani (Large Dark Olive) Baetidae 2
Cloeon dipterum (Pond Olive) Baetidae 2
Paraleptophlebia submarginata (Turkey Brown) Leptophlebiidae 1
Trichoptera (Caddisflies)
Silo nigricornis (Humpless Case-maker Caddisflies) Goeridae 1

🔗 Your Ecological Twin

Most similar site: A10 - Holycross road (downstream site)
River: Ash (different river)
Similarity: 26% of species shared
Download Data

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

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