Ontologia

HydroBASINS lev08 watershed · #2080566950

Bassin du Tarn

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 : Aveyron, Lozère

Pfafstetter: 23214909

Sub-basin area

948,2km²

Upstream area

948,2km²

Discharge

22,27m³/s

Mean elev.

972m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin du Tarn240 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

2 dept-equivalent regions (GADM L2)

44 communes (GADM L5)

19 intersecting protected areas

10 more protected areas

  • Gorges du Tarn et de la Jonte

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    5.81 km² overlap

  • Gorges du Tarn

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    4.57 km² overlap

  • Gorges du Tarn

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    4.47 km² overlap

  • Bougès

    IUCN IV

    Forest Managed Biological Reserve

    3.78 km² overlap

  • Combe des Cades

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    2.98 km² overlap

  • serre de guinet

    IUCN IV

    Land acquired by a regional conservatory of natural areas

    0.90 km² overlap

  • Vallée du Gardon de Mialet

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.58 km² overlap

  • Vallée du Gardon de Saint-Jean

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.33 km² overlap

  • Valdonnez

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.31 km² overlap

  • camp de rose

    IUCN IV

    Land acquired by a regional conservatory of natural areas

    0.08 km² overlap

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

Species present

7 132 distinct species · 341 719 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

341 719 obs · 27 cellules
Obs. / cellule
≥ 33 741
18 746–33 740
14 143–18 745
12 026–14 142
< 12 026

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

Ecological tissue

Sample of 38 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 du Tarn : 32 espèces + 6 bulles famille, 72 interactions GloBI documentées sur 5 types (connectance 10.2%, filtre Serrano α=0.2). Les 6 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
38
Interactions affichées
72
Connectance
0.102
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°

8,7°C

Annual rain

811mm

Moisture idx (CMI)

-0,03

Runoff

617mm/an

PET

838mm

AET

636mm

Mean slope

12,4°

Water table

503cm

Forest

67%

Crops

27%

Urban

0%

Protected

96%

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