📍 B4: Frogmore Hall - Rookery

River: Beane Catchment: Upper Lea (Hertfordshire) Filter(s): 117

Your Site at a Glance

362
Species Detected
243
Genera Identified
124
Families Found
854,963
DNA Sequences

How Your Site Compares

Metric Your Site Beane Average Study Average
Species 362 268 206
Genera 243 193 151
Families 124 103 83
EPT Families 2 5 6

Rank 3 of 10 on Beane Rank 3 of 81 in study

🌊 Water Quality Indicators

Moderate

BMWP score: 56 (Moderate) — ASPT score: 4.7 (Moderate)

12 scoring macroinvertebrate families detected

Water quality is moderately impacted; some pollution-sensitive families are present but diversity is limited.

🔍 Notable Findings

Conservation Species:

Invasive Species:

🦋 Top 10 Families at Your Site

1. Chironomidae (Non-biting Midges)
44 (12.2%)
2. Enchytraeidae (Potworms)
33 (9.1%)
3. Naididae (Aquatic Oligochaetes)
26 (7.2%)
4. Lumbricidae (Common Earthworms)
19 (5.2%)
5. Staphylinidae (Rove Beetles)
19 (5.2%)
6. Tipulidae (Crane Flies)
13 (3.6%)
7. Limoniidae (Limoniid Crane Flies)
7 (1.9%)
8. Psychodidae (Moth Flies)
7 (1.9%)
9. Sphaeroceridae (Small Dung Flies)
5 (1.4%)
10. Syrphidae (Hoverflies)
5 (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 ✗
14/33 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

7 fish species detected (6 families, 34 ESVs)
SpeciesFamilyESVs
Barbatula barbatula (Stone Loach) Nemacheilidae 7
Rutilus frisii Cyprinidae 3
Phoxinus phoxinus (Minnow) Cyprinidae 2
Gasterosteus aculeatus (Three-spined Stickleback) Gasterosteidae 2
Potamorrhaphis guianensis Belonidae 1
Cottus bairdii Cottidae 1
Salmo trutta (Brown Trout / Sea Trout) Salmonidae 1

🪰 EPT Species (Mayflies, Stoneflies & Caddisflies)

4 EPT species detected (2 families, 8 ESVs — E:3 / P:0 / T:1)
SpeciesFamilyESVs
Ephemeroptera (Mayflies)
Baetis rhodani (Large Dark Olive) Baetidae 2
Procloeon pennulatum (Large Spurwing) Baetidae 2
Baetis vernus (Medium Olive) Baetidae 1
Trichoptera (Caddisflies)
Glyphotaelius pellucidus (Northern Caddisflies) Limnephilidae 2

🔗 Your Ecological Twin

Most similar site: B9 - Stapleford Church
River: Beane (same river)
Similarity: 37% of species shared
Download Data

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

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