Ontologia

HydroBASINS lev08 watershed · #2080431930

Bassin de la Basse Selle

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 1 administrative regions : Somme

Pfafstetter: 23250205

Sub-basin area

37,8km²

Upstream area

3 774,6km²

Discharge

45,75m³/s

Mean elev.

56m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de la Somme Canalisée404 km²

▲ Receives from 2 basins

1 dept-equivalent regions (GADM L2)

6 communes (GADM L5)

3 intersecting protected areas

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

Species present

1 876 distinct species · 23 227 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

23 227 obs · 1 cellules
Obs. / cellule
≥ 23 227
23 227–23 226
23 227–23 226
23 227–23 226
< 23 227

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 la Basse Selle : 32 espèces dont 4 patrimoniales (LR IUCN CR/EN/VU) reliées par 114 interactions GloBI sur 5 types (connectance 13.2%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
42
Interactions affichées
114
Connectance
0.132
Patrimoniales
4
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°

10,3°C

Annual rain

644mm

Moisture idx (CMI)

-0,15

Runoff

451mm/an

PET

757mm

AET

529mm

Mean slope

1,3°

Water table

93cm

Forest

0%

Crops

51%

Urban

68%

Protected

0%

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