Ontologia

HydroBASINS lev08 watershed · #2080033720

Bassin de Vårneselva

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 4 administrative regions : Larvik, Sandefjord, Stokke, Tønsberg

Coastal basin 16% lakePfafstetter: 25105005

Sub-basin area

237,4km²

Upstream area

237,4km²

Discharge

5,01m³/s

Mean elev.

34m

Administrative coverage

4 dept-equivalent regions (GADM L2)

30 intersecting protected areas

  • Akersvannet

    IUCN Ia

    Nature Reserve

    2.52 km² overlap

  • Vikerøya

    IUCN V

    Protected Landscape

    1.44 km² overlap

  • Langø

    IUCN V

    Protected Landscape

    0.85 km² overlap

  • Indre Viksfjord

    IUCN Ia

    Nature Reserve

    0.80 km² overlap

  • Malmøya

    IUCN Not Reported

    Emerald Network

    0.64 km² overlap

  • Malmøya

    IUCN Ia

    Nature Reserve

    0.64 km² overlap

  • Hemskilen

    IUCN Ia

    Nature Reserve

    0.33 km² overlap

  • Hemskilen

    IUCN Not Reported

    Emerald Network

    0.33 km² overlap

  • Hemskilen

    IUCN IV

    Wildlife Conservation Area

    0.24 km² overlap

21 more protected areas

  • Ertholmen

    IUCN IV

    Wildlife Conservation Area

    0.16 km² overlap

  • Bokemoa

    IUCN V

    Protected Landscape

    0.14 km² overlap

  • Lyngholmen

    IUCN IV

    Wildlife Conservation Area

    0.13 km² overlap

  • Bølene

    IUCN IV

    Wildlife Conservation Area

    0.12 km² overlap

  • Refsholttjønna

    IUCN Ia

    Nature Reserve

    0.10 km² overlap

  • Ferjeholmen

    IUCN IV

    Wildlife Conservation Area

    0.08 km² overlap

  • Robergvannet

    IUCN Ia

    Nature Reserve

    0.08 km² overlap

  • Ringane

    IUCN Ia

    Nature Reserve

    0.06 km² overlap

  • Strømsundholmen

    IUCN IV

    Wildlife Conservation Area

    0.05 km² overlap

  • Sundskjæra

    IUCN IV

    Wildlife Conservation Area

    0.04 km² overlap

  • Marøyskjæra

    IUCN IV

    Wildlife Conservation Area

    0.04 km² overlap

  • Fokserød

    IUCN Ia

    Nature Reserve

    0.04 km² overlap

  • Melsom

    IUCN IV

    Wildlife/Botanical Conservation Area

    0.03 km² overlap

  • Bjønnesholmen

    IUCN IV

    Wildlife Conservation Area

    0.02 km² overlap

  • Strandvika

    IUCN Ia

    Nature Reserve

    0.02 km² overlap

  • Askvikmyra

    IUCN Ia

    Nature Reserve

    0.02 km² overlap

  • Flatholmen

    IUCN IV

    Wildlife Conservation Area

    0.01 km² overlap

  • Holtan

    IUCN IV

    Botanical Conservation Area

    0.01 km² overlap

  • Ilene and Presterodkilen Wetland System

    IUCN Ia

    Wetland of International Importance (Ramsar Site)

    0.01 km² overlap

  • Ilene

    IUCN Ia

    Nature Reserve

    0.01 km² overlap

  • Ilene

    IUCN Not Reported

    Emerald Network

    0.01 km² overlap

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

Species present

8 909 distinct species · 553 056 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

553 056 obs · 8 cellules
Obs. / cellule
≥ 190 642
190 642–190 641
71 225–190 641
53 989–71 224
< 53 989

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

Ecological tissue

Sample of 33 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 Vårneselva : 26 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 64 interactions GloBI sur 4 types (connectance 12.1%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
64
Connectance
0.121
Patrimoniales
2
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°

7,2°C

Annual rain

729mm

Moisture idx (CMI)

0,34

Runoff

679mm/an

PET

477mm

AET

405mm

Mean slope

3,2°

Water table

161cm

Forest

57%

Crops

24%

Urban

15%

Protected

3%

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