Ontologia

Ruisseau· 10 segments

L'Arn

Crosses 2 administrative regions : Hérault, Tarn

ruisseau

Total length

58km

Max discharge

2,7m³/s

Max Strahler

2

Segments matched

10

River geography2 admin regions · 13 communes

Parent watershed

hybas-2080577790564 km²

2 administrative regions crossed (GADM L2)

  • Tarn
    Occitanie · France
    40.3 km
    in this dpt
  • Hérault
    Occitanie · France
    13.4 km
    in this dpt
13 communes (L5)

3 intersecting protected areas

1 page = 1 named river (aggregation of 10 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

1 407 distinct species · 7 071 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 37 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 L'Arn : 30 espèces + 7 bulles famille, 72 interactions GloBI documentées sur 6 types (connectance 10.8%, filtre Serrano α=0.2). Les 7 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
37
Interactions affichées
72
Connectance
0.108
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

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

Hydrology (HydroRIVERS v10)

Total length

58km

Max discharge

2,7m³/s

Max Strahler

2

Segments matched

10

HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.