📍 R8: Cold Christmas

River: Rib Catchment: Upper Lea (Hertfordshire) Filter(s): 101

Your Site at a Glance

157
Species Detected
120
Genera Identified
68
Families Found
1,146,629
DNA Sequences

How Your Site Compares

Metric Your Site Rib Average Study Average
Species 157 160 206
Genera 120 123 151
Families 68 72 83
EPT Families 8 5 6

Rank 6 of 9 on Rib Rank 58 of 81 in study

🌊 Water Quality Indicators

Very Good

BMWP score: 111 (Very Good) — ASPT score: 6.5 (Excellent)

17 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)
44 (28.0%)
2. Naididae (Aquatic Oligochaetes)
19 (12.1%)
3. Simuliidae (Black Flies)
4 (2.5%)
4. Cyprinidae (Carp and Allies)
4 (2.5%)
5. Muridae (Old World Mice and Rats)
3 (1.9%)
6. Gasterosteidae (Sticklebacks)
3 (1.9%)
7. Lumbricidae (Common Earthworms)
3 (1.9%)
8. Psychodidae (Moth Flies)
3 (1.9%)
9. Limnephilidae (Northern Caddisflies)
3 (1.9%)
10. Limoniidae (Limoniid Crane Flies)
3 (1.9%)
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
19/33 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

9 fish species detected (5 families, 63 ESVs)
SpeciesFamilyESVs
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 8
Phoxinus phoxinus (Minnow) Cyprinidae 6
Squalius cephalus (Chub) Cyprinidae 5
Salmo trutta (Brown Trout / Sea Trout) Salmonidae 4
Barbatula barbatula (Stone Loach) Nemacheilidae 4
Cottus bairdii Cottidae 3
Rutilus frisii Cyprinidae 3
Squalius alburnoides Cyprinidae 2
Thymallus aeliani Salmonidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

12 EPT species detected (8 families, 15 ESVs — E:5 / P:1 / T:6)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Baetis rhodani (Large Dark Olive) Baetidae 2
Paraleptophlebia submarginata (Turkey Brown) Leptophlebiidae 2
Baetis scambus (Small Dark Olive) Baetidae 1
Serratella ignita (Blue Winged Olive) Ephemerellidae 1
Ephemera danica (The Mayfly) Ephemeridae 1
Plecoptera (Stoneflies)
Leuctra fusca (Late Needle Fly) Leuctridae 2
Trichoptera (Caddisflies)
Hydroptila sparsa (Microcaddisflies) Hydroptilidae 1
Athripsodes albifrons (Long-horned Caddisflies) Leptoceridae 1
Leptocerus tineiformis (Long-horned Caddisflies) Leptoceridae 1
Chaetopteryx villosa (Northern Caddisflies) Limnephilidae 1
Glyphotaelius pellucidus (Northern Caddisflies) Limnephilidae 1
Limnephilus extricatus (Northern Caddisflies) Limnephilidae 1

🔗 Your Ecological Twin

Most similar site: A9 - Watersplace Farm
River: Ash (different river)
Similarity: 46% of species shared
Download Data

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

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