HydroLAKES lake · #102
Malaren
Surface area
1 083,13km²
Avg depth
12,9m
Volume
14 000km³
Shoreline
2 125,6km
Administrative coverage
23 dept-equivalent regions (GADM L2)
- SträngnäsSödermanland · Sweden210.90 km²19.4% of lake
- VästeråsVästmanland · Sweden203.91 km²18.7% of lake
- EnköpingUppsala · Sweden164.62 km²15.1% of lake
- EkeröStockholm · Sweden160.62 km²14.7% of lake
- Upplands-BroStockholm · Sweden89.40 km²8.2% of lake
- SödertäljeStockholm · Sweden40.85 km²3.8% of lake
30 intersecting protected areas
Asköviken-Sörfjärden
IUCN IVWetland of International Importance (Ramsar Site)
98.66 km² overlap
Ridöarkipelagen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
43.59 km² overlap
Ridöarkipelagen
IUCN VNatura 2000 SPA
43.59 km² overlap
Ridöarkipelagen
IUCN VNatura 2000 SCI
43.59 km² overlap
Ridöarkipelagen
IUCN Not ReportedSpecial Protection Area (Birds Directive)
43.59 km² overlap
Nature Reserve
43.50 km² overlap
Ängsö
IUCN IVNatura 2000 SPA
43.02 km² overlap
Ängsö
IUCN IVNatura 2000 SCI
43.02 km² overlap
Ängsö
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
43.02 km² overlap
21 more protected areassorted by overlap area
Ängsö
IUCN Not ReportedSpecial Protection Area (Birds Directive)
43.02 km² overlap
2001338 Ängsö
IUCN IVNature Reserve
43.01 km² overlap
Ridö-Sundbyholmsarkipelagen södra
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
24.57 km² overlap
Natura 2000 SCI
24.57 km² overlap
Ridö-Sundbyholmsarkipelagen södra
IUCN Not ReportedSpecial Protection Area (Birds Directive)
24.57 km² overlap
Natura 2000 SPA
24.57 km² overlap
Nature Reserve
24.57 km² overlap
2024689 Lovö
IUCN VNature Reserve
11.13 km² overlap
2001346 Strömsholm
IUCN VNature Reserve
10.41 km² overlap
Strömsholm
IUCN VNatura 2000 SPA
10.41 km² overlap
Strömsholm
IUCN VNatura 2000 SCI
10.41 km² overlap
Strömsholm
IUCN Not ReportedSpecial Protection Area (Birds Directive)
10.41 km² overlap
Strömsholm
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
10.41 km² overlap
2002172 Grönsö
IUCN IaNature Reserve
9.11 km² overlap
Norra Björkfjärden, ost
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
8.15 km² overlap
2002738 Norra Björkfjärden
IUCN IaNature Reserve
8.15 km² overlap
Norra Björkfjärden, ost
IUCN IaNatura 2000 SCI
8.15 km² overlap
Veckholms skjutfält
IUCN Not AssignedAgreement between government agencies
7.81 km² overlap
2002171 Härjarö
IUCN VNature Reserve
6.91 km² overlap
Segersön
IUCN Not AssignedNatura 2000 SCI
6.59 km² overlap
Segersön
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
6.59 km² overlap
Computed live · HydroLAKES × GADM × WDPA · cached after first hit.
Species present
10 630 distinct species · 1 111 528 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 34 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.
ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).
Indicateurs du tissu écologique
Tissu écologique de Malaren : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 79 interactions GloBI sur 3 types (connectance 14.1%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Lake statistics (HydroLAKES)
Surface
1 083,13km²
Avg depth
12,9m
Volume
14 000,000km³
Watershed
22 682km²
Shoreline
2 125,6km
Shore dev. idx
18,22
Residence time
947days
Elevation
3m
HydroLAKES v1.0 (Messager et al. 2016) · 1.4M lacs ≥ 0.1 km² mondialement.