Ontologia

HydroBASINS lev08 watershed · #2080022180

Bassin de la Lézarde

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 : Seine-Maritime

16% lakePfafstetter: 23250102

Sub-basin area

317,4km²

Upstream area

317,6km²

Discharge

6,53m³/s

Mean elev.

73m

Administrative coverage

1 dept-equivalent regions (GADM L2)

43 communes (GADM L5)

7 intersecting protected areas

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

Species present

5 711 distinct species · 380 190 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

380 190 obs · 19 cellules
Obs. / cellule
≥ 90 806
64 098–90 805
16 799–64 097
11 369–16 798
< 11 369

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

Ecological tissue

Sample of 51 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 Lézarde : 19 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 254 interactions GloBI sur 5 types (connectance 13.9%, filtre Serrano α=0.2). 42 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
61
Interactions affichées
254
Connectance
0.139
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

712mm

Moisture idx (CMI)

-0,06

Runoff

621mm/an

PET

760mm

AET

543mm

Mean slope

1,8°

Water table

103cm

Forest

0%

Crops

44%

Urban

28%

Protected

6%

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