📍 A9: Watersplace Farm

River: Ash Catchment: Upper Lea (Hertfordshire) Filter(s): 53

Your Site at a Glance

215
Species Detected
164
Genera Identified
90
Families Found
569,399
DNA Sequences

How Your Site Compares

Metric Your Site Ash Average Study Average
Species 215 211 206
Genera 164 159 151
Families 90 93 83
EPT Families 11 9 6

Rank 4 of 7 on Ash Rank 42 of 81 in study

🌊 Water Quality Indicators

Very Good

BMWP score: 140 (Very Good) — ASPT score: 6.4 (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)
54 (25.1%)
2. Naididae (Aquatic Oligochaetes)
22 (10.2%)
3. Cyprinidae (Carp and Allies)
5 (2.3%)
4. Tipulidae (Crane Flies)
4 (1.9%)
5. Enchytraeidae (Potworms)
4 (1.9%)
6. Ectopsocidae (Ectopsocid Barklice)
4 (1.9%)
7. Simuliidae (Black Flies)
4 (1.9%)
8. Lumbricidae (Common Earthworms)
4 (1.9%)
9. Elmidae (Riffle Beetles)
3 (1.4%)
10. Carabidae (Ground Beetles)
3 (1.4%)
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
22/33 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

10 fish species detected (6 families, 90 ESVs)
SpeciesFamilyESVs
Phoxinus phoxinus (Minnow) Cyprinidae 12
Leuciscus leuciscus (Dace) Cyprinidae 9
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 7
Squalius cephalus (Chub) Cyprinidae 7
Salmo trutta (Brown Trout / Sea Trout) Salmonidae 6
Barbatula barbatula (Stone Loach) Nemacheilidae 4
Thymallus aeliani Salmonidae 4
Cottus bairdii Cottidae 3
Rutilus frisii Cyprinidae 3
Squalius alburnoides Cyprinidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

17 EPT species detected (11 families, 33 ESVs — E:9 / P:2 / T:6)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Habrophlebia fusca (Ditch Dun) Leptophlebiidae 5
Paraleptophlebia submarginata (Turkey Brown) Leptophlebiidae 4
Ephemera danica (The Mayfly) Ephemeridae 3
Baetis rhodani (Large Dark Olive) Baetidae 2
Baetis scambus (Small Dark Olive) Baetidae 2
Baetis vernus (Medium Olive) Baetidae 2
Ephemera vulgata (Drake Mackerel) Ephemeridae 2
Caenis luctuosa (Angler's Curse) Caenidae 1
Serratella ignita (Blue Winged Olive) Ephemerellidae 1
Plecoptera (Stoneflies)
Leuctra fusca (Late Needle Fly) Leuctridae 3
Leuctra digitata (Rolled-winged Stoneflies) Leuctridae 1
Trichoptera (Caddisflies)
Silo nigricornis (Humpless Case-maker Caddisflies) Goeridae 1
Hydroptila sparsa (Microcaddisflies) Hydroptilidae 1
Glyphotaelius pellucidus (Northern Caddisflies) Limnephilidae 1
Limnephilus extricatus (Northern Caddisflies) Limnephilidae 1
Lype phaeopa (Tube-case Caddisflies) Psychomyiidae 1
Notidobia ciliaris (Sericostomatid Caddisflies) Sericostomatidae 1

🔗 Your Ecological Twin

Most similar site: A7 - Hoghams
River: Ash (same river)
Similarity: 48% of species shared
Download Data

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

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