📍 MM4: Codicote Bottom

River: Mimram Catchment: Upper Lea (Hertfordshire) Filter(s): 134

Your Site at a Glance

33
Species Detected
25
Genera Identified
16
Families Found
6,609
DNA Sequences

How Your Site Compares

Metric Your Site Mimram Average Study Average
Species 33 204 206
Genera 25 151 151
Families 16 77 83
EPT Families 2 8 6

Rank 10 of 10 on Mimram Rank 79 of 81 in study

🌊 Water Quality Indicators

Poor

BMWP score: 27 (Poor) — ASPT score: 4.5 (Moderate)

6 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. Chironomidae (Non-biting Midges)
17 (51.5%)
2. Anatidae (Ducks, Geese, and Swans)
2 (6.1%)
3. Bibionidae (March Flies)
1 (3.0%)
4. Naididae (Aquatic Oligochaetes)
1 (3.0%)
5. Drosophilidae (Vinegar Flies)
1 (3.0%)
6. Empididae (Dance Flies)
1 (3.0%)
7. Psychodidae (Moth Flies)
1 (3.0%)
8. Culicidae (Mosquitoes)
1 (3.0%)
9. Simuliidae (Black Flies)
1 (3.0%)
10. Tipulidae (Crane Flies)
1 (3.0%)
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 ✓
7/33 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

1 fish species detected (1 families, 1 ESVs)
SpeciesFamilyESVs
Salmo trutta (Brown Trout / Sea Trout) Salmonidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

2 EPT species detected (2 families, 3 ESVs — E:1 / P:1 / T:0)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Baetis rhodani (Large Dark Olive) Baetidae 1
Plecoptera (Stoneflies)
Nemurella pictetii (Pictet's Stonefly) Nemouridae 2

🔗 Your Ecological Twin

Most similar site: M7 - Chalfont St Peter Community Centre
River: Misbourne (different river)
Similarity: 17% of species shared
Download Data

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

Project logos