Ontologia

HydroBASINS lev08 watershed · #2080016460

Bassin de l'Arc

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 2 administrative regions : Bouches-du-Rhône, Var

105% lakePfafstetter: 21601080

Sub-basin area

1 591,1km²

Upstream area

1 591,1km²

Discharge

14,61m³/s

Mean elev.

193m

Administrative coverage

2 dept-equivalent regions (GADM L2)

65 communes (GADM L5)

29 intersecting protected areas

20 more protected areas

  • La cote bleue

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    9.96 km² overlap

  • Crau

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    9.68 km² overlap

  • Chaîne de l'Etoile- massif du Garlaban

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    9.33 km² overlap

  • Etang de bolmon

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    7.56 km² overlap

  • Plateau de vitrolles

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    5.94 km² overlap

  • Domaine De Calissane

    IUCN IV

    Biotope Protection Order

    5.88 km² overlap

  • Salines de l'Étang de Berre

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    4.52 km² overlap

  • Collines de caderaou - figuerolles

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    4.35 km² overlap

  • Les Alpilles

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    2.75 km² overlap

  • Les Alpilles

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    2.75 km² overlap

  • Sainte-Victoire

    IUCN III

    National Nature Reserve

    1.43 km² overlap

  • Poudrerie de saint-chamas

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    1.18 km² overlap

  • La petite camargue

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    1.11 km² overlap

  • Les Fourques, Le Portale Et Le Vallon De Garangeol

    IUCN IV

    Biotope Protection Order

    0.56 km² overlap

  • Le Jas De Rhodes

    IUCN IV

    Biotope Protection Order

    0.51 km² overlap

  • La Sambre

    IUCN IV

    Biotope Protection Order

    0.42 km² overlap

  • Marais de tete noire

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    0.17 km² overlap

  • Poitevine-Regarde-Venir

    IUCN IV

    Regional Nature Reserve

    0.02 km² overlap

  • Monteau-barabant

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    0.01 km² overlap

  • malouesse

    IUCN IV

    Land acquired by a regional conservatory of natural areas

    0.00 km² overlap

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

Species present

9 296 distinct species · 895 406 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

895 406 obs · 43 cellules
Obs. / cellule
≥ 166 415
32 527–166 414
23 893–32 526
14 591–23 892
< 14 591

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

Ecological tissue

Sample of 40 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 l'Arc : 35 espèces + 5 bulles famille, 53 interactions GloBI documentées sur 4 types (connectance 6.8%, filtre Serrano α=0.2). Les 5 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
40
Interactions affichées
53
Connectance
0.068
Patrimoniales
0
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°

13,1°C

Annual rain

640mm

Moisture idx (CMI)

-0,33

Runoff

295mm/an

PET

962mm

AET

539mm

Mean slope

3,9°

Water table

239cm

Forest

17%

Crops

14%

Urban

28%

Protected

3%

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