📍 U2: Batford Springs

River: Lea Catchment: Upper Lea (Hertfordshire) Filter(s): 125

Your Site at a Glance

233
Species Detected
158
Genera Identified
75
Families Found
1,024,248
DNA Sequences

How Your Site Compares

Metric Your Site Lea Average Study Average
Species 233 251 206
Genera 158 174 151
Families 75 87 83
EPT Families 5 6 6

Rank 8 of 10 on Lea Rank 35 of 81 in study

🌊 Water Quality Indicators

Good

BMWP score: 85 (Good) — ASPT score: 5.3 (Good)

16 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)
70 (30.0%)
2. Naididae (Aquatic Oligochaetes)
28 (12.0%)
3. Cyprinidae (Carp and Allies)
12 (5.2%)
4. Simuliidae (Black Flies)
6 (2.6%)
5. Anatidae (Ducks, Geese, and Swans)
6 (2.6%)
6. Lumbricidae (Common Earthworms)
6 (2.6%)
7. Psychodidae (Moth Flies)
4 (1.7%)
8. Tipulidae (Crane Flies)
4 (1.7%)
9. Syrphidae (Hoverflies)
3 (1.3%)
10. Staphylinidae (Rove Beetles)
3 (1.3%)
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 ✗
16/33 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

16 fish species detected (6 families, 209 ESVs)
SpeciesFamilyESVs
Phoxinus phoxinus (Minnow) Cyprinidae 17
Squalius cephalus (Chub) Cyprinidae 14
Gobio gobio (Gudgeon) Cyprinidae 10
Barbus barbus (Barbel) Cyprinidae 8
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 7
Barbatula barbatula (Stone Loach) Nemacheilidae 7
Cyprinus carpio (Common Carp) Cyprinidae 5
Rutilus frisii Cyprinidae 4
Scardinius racovitzai Cyprinidae 4
Gobio kovatschevi Cyprinidae 3
Carassius auratus (Goldfish) Cyprinidae 3
Cottus bairdii Cottidae 1
Gobio muresius Cyprinidae 1
Rutilus rubilio Cyprinidae 1
Squalius alburnoides Cyprinidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

7 EPT species detected (5 families, 10 ESVs — E:4 / P:0 / T:3)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Baetis rhodani (Large Dark Olive) Baetidae 2
Serratella ignita (Blue Winged Olive) Ephemerellidae 2
Cloeon dipterum (Pond Olive) Baetidae 1
Caenis luctuosa (Angler's Curse) Caenidae 1
Trichoptera (Caddisflies)
Glyphotaelius pellucidus (Northern Caddisflies) Limnephilidae 2
Hydroptila sparsa (Microcaddisflies) Hydroptilidae 1
Limnephilus marmoratus (Northern Caddisflies) Limnephilidae 1

🔗 Your Ecological Twin

Most similar site: U1B - East Hyde
River: Lea (same river)
Similarity: 51% of species shared
Download Data

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

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