Ontologia

HydroBASINS lev08 watershed · #2080022470

Bassin de la Liane

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 : Nord, Pas-de-Calais

Coastal basinPfafstetter: 23250305

Sub-basin area

1 095,4km²

Upstream area

1 095,4km²

Discharge

1,23m³/s

Mean elev.

49m

Administrative coverage

2 dept-equivalent regions (GADM L2)

129 communes (GADM L5)

30 intersecting protected areas

21 more protected areas

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

Species present

11 535 distinct species · 1 006 150 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 006 150 obs · 35 cellules
Obs. / cellule
≥ 80 343
45 893–80 342
37 852–45 892
22 754–37 851
< 22 754

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 la Liane : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 139 interactions GloBI sur 6 types (connectance 24.8%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
139
Connectance
0.248
Patrimoniales
1
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

630mm

Moisture idx (CMI)

0,00

Runoff

564mm/an

PET

631mm

AET

474mm

Mean slope

2,2°

Water table

118cm

Forest

3%

Crops

54%

Urban

12%

Protected

64%

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