Ruisseau· 2 segments
Usserød Å
Crosses 4 administrative regions : Allerød, Fredensborg, Hørsholm, Rudersdal
Total length
8km
Max discharge
0,9m³/s
Max Strahler
2
Segments matched
2
River geography4 admin regions · 0 communes
4 administrative regions crossed (GADM L2)
- HørsholmHovedstaden · Denmark6.7 kmin this dpt
- FredensborgHovedstaden · Denmark3.0 kmin this dpt
- RudersdalHovedstaden · Denmark0.7 kmin this dpt
- AllerødHovedstaden · Denmark0.7 kmin this dpt
11 intersecting protected areas
W
IUCN IVMarine Strategy Area
Rudersdal Kommune public
IUCN IV§3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)
Fredensborg Kommune public
IUCN IV§3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)
Fredensborg Kommune private
IUCN Not Assigned§3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)
Allerød Kommune public
IUCN IV§3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)
Allerød Kommune private
IUCN Not Assigned§3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)
Hørsholm Kommune private
IUCN Not Assigned§3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)
Nivå Ådal
IUCN VProtected by conservation order, excl. Church surroundings
Rudersdal Kommune private
IUCN Not Assigned§3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)
2 more protected areassorted by area
Hørsholm Kommune public
IUCN IV§3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)
Usserød Ådal
IUCN VProtected by conservation order, excl. Church surroundings
1 page = 1 named river (aggregation of 2 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
3 110 distinct species · 105 673 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 35 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 Usserød Å : 27 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 85 interactions GloBI sur 6 types (connectance 12.8%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
8km
Max discharge
0,9m³/s
Max Strahler
2
Segments matched
2
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.