Ontologia

HydroBASINS lev08 watershed · #2080033850

Bassin de Lilleelv

A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.

Crosses 3 administrative regions : Arendal, Froland, Grimstad

46% lakePfafstetter: 25107201

Sub-basin area

106,3km²

Upstream area

4 024,4km²

Discharge

101,41m³/s

Mean elev.

67m

Administrative coverage

Hydrographic chain

▼ Drains into

Outlet (drains to ocean / endorheic)

▲ Receives from 2 basins

3 dept-equivalent regions (GADM L2)

2 intersecting protected areas

  • Raet

    IUCN Not Reported

    National Park

    0.68 km² overlap

  • Urdalen

    IUCN Ia

    Nature Reserve

    0.26 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

4 872 distinct species · 107 383 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

107 383 obs · 4 cellules
Obs. / cellule
≥ 55 284
55 284–55 283
29 139–55 283
29 139–29 138
< 29 139

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

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).

RègnesAnimalPlanteChampignonBacterie
RelationsPredationParasitismeSymbiosePollinisation
StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Lilleelv : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 95 interactions GloBI sur 5 types (connectance 15.1%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
95
Connectance
0.151
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

7,0°C

Annual rain

1 053mm

Moisture idx (CMI)

0,54

Runoff

910mm/an

PET

488mm

AET

448mm

Mean slope

4,0°

Water table

195cm

Forest

54%

Crops

16%

Urban

19%

Protected

0%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)