📍 A8: Watersplace US

River: Ash Catchment: Upper Lea (Hertfordshire) Filter(s): 128

Your Site at a Glance

205
Species Detected
155
Genera Identified
94
Families Found
824,497
DNA Sequences

How Your Site Compares

Metric Your Site Ash Average Study Average
Species 205 211 206
Genera 155 159 151
Families 94 93 83
EPT Families 11 9 6

Rank 5 of 7 on Ash Rank 45 of 81 in study

🌊 Water Quality Indicators

Very Good

BMWP score: 145 (Very Good) — ASPT score: 6.6 (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)
48 (23.4%)
2. Naididae (Aquatic Oligochaetes)
21 (10.2%)
3. Lumbricidae (Common Earthworms)
7 (3.4%)
4. Simuliidae (Black Flies)
5 (2.4%)
5. Psychodidae (Moth Flies)
4 (2.0%)
6. Cyclopidae (Cyclopoid Copepods)
3 (1.5%)
7. Cyprinidae (Carp and Allies)
3 (1.5%)
8. Salmonidae (Salmon and Trout)
3 (1.5%)
9. Phasianidae (Pheasants and Partridges)
3 (1.5%)
10. Muridae (Old World Mice and Rats)
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
21/33 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

8 fish species detected (6 families, 89 ESVs)
SpeciesFamilyESVs
Phoxinus phoxinus (Minnow) Cyprinidae 12
Leuciscus leuciscus (Dace) Cyprinidae 9
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 9
Squalius cephalus (Chub) Cyprinidae 6
Salmo trutta (Brown Trout / Sea Trout) Salmonidae 5
Cottus bairdii Cottidae 4
Thymallus aeliani Salmonidae 3
Barbatula barbatula (Stone Loach) Nemacheilidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

15 EPT species detected (11 families, 30 ESVs — E:8 / P:2 / T:5)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Paraleptophlebia submarginata (Turkey Brown) Leptophlebiidae 4
Baetis scambus (Small Dark Olive) Baetidae 3
Habrophlebia fusca (Ditch Dun) Leptophlebiidae 3
Baetis rhodani (Large Dark Olive) Baetidae 2
Serratella ignita (Blue Winged Olive) Ephemerellidae 2
Ephemera danica (The Mayfly) Ephemeridae 2
Baetis vernus (Medium Olive) Baetidae 1
Caenis luctuosa (Angler's Curse) Caenidae 1
Plecoptera (Stoneflies)
Leuctra fusca (Late Needle Fly) Leuctridae 3
Leuctra digitata (Rolled-winged Stoneflies) Leuctridae 1
Trichoptera (Caddisflies)
Hydroptila sparsa (Microcaddisflies) Hydroptilidae 2
Lepidostoma hirtum (Lepidostomatid Caddisflies) Lepidostomatidae 2
Glyphotaelius pellucidus (Northern Caddisflies) Limnephilidae 2
Silo nigricornis (Humpless Case-maker Caddisflies) Goeridae 1
Notidobia ciliaris (Sericostomatid Caddisflies) Sericostomatidae 1

🔗 Your Ecological Twin

Most similar site: A9 - Watersplace Farm
River: Ash (same river)
Similarity: 48% of species shared
Download Data

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

Project logos