📍 U1A: Manor Road Park (upstream site)

River: Lea Catchment: Upper Lea (Hertfordshire) Filter(s): 10

Your Site at a Glance

121
Species Detected
92
Genera Identified
53
Families Found
524,423
DNA Sequences

How Your Site Compares

Metric Your Site Lea Average Study Average
Species 121 251 206
Genera 92 174 151
Families 53 87 83
EPT Families 1 6 6

Rank 10 of 10 on Lea Rank 68 of 81 in study

🌊 Water Quality Indicators

Poor

BMWP score: 35 (Poor) — ASPT score: 3.5 (Poor)

10 scoring macroinvertebrate families detected

Indicators suggest polluted or significantly impacted water quality at this site.

🔍 Notable Findings

Conservation Species:

Invasive Species:

🦋 Top 10 Families at Your Site

1. Naididae (Aquatic Oligochaetes)
25 (20.7%)
2. Chironomidae (Non-biting Midges)
18 (14.9%)
3. Lumbricidae (Common Earthworms)
8 (6.6%)
4. Erpobdellidae (Jawless Leeches)
3 (2.5%)
5. Syrphidae (Hoverflies)
3 (2.5%)
6. Hydridae (Freshwater Hydras)
3 (2.5%)
7. Cyprinidae (Carp and Allies)
3 (2.5%)
8. Columbidae (Pigeons and Doves)
3 (2.5%)
9. Planorbidae (Ramshorn Snails)
3 (2.5%)
10. Anatidae (Ducks, Geese, and Swans)
3 (2.5%)
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
11/33 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

6 fish species detected (4 families, 31 ESVs)
SpeciesFamilyESVs
Phoxinus phoxinus (Minnow) Cyprinidae 7
Scardinius racovitzai Cyprinidae 5
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 4
Potamorrhaphis guianensis Belonidae 1
Cottus bairdii Cottidae 1
Gobio gobio (Gudgeon) Cyprinidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

1 EPT species detected (1 families, 2 ESVs — E:1 / P:0 / T:0)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Baetis rhodani (Large Dark Olive) Baetidae 2

🔗 Your Ecological Twin

Most similar site: S1 - Bridge opposite Dunelm (upstream site)
River: Stevenage Brook (different river)
Similarity: 29% of species shared
Download Data

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

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