Ontologia

HydroBASINS lev08 watershed · #2080000440

Bassin de נחל אלכסנדר

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 5 administrative regions : Jenin, Nablus, Qalqilya, Tubas, Tulkarm

Coastal basinPfafstetter: 21101730

Sub-basin area

1 937,8km²

Upstream area

1 937,8km²

Discharge

0,4m³/s

Mean elev.

181m

Administrative coverage

5 dept-equivalent regions (GADM L2)

30 intersecting protected areas

21 more protected areas

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

Species present

5 010 distinct species · 1 104 421 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 104 421 obs · 47 cellules
Obs. / cellule
≥ 180 772
80 966–180 771
19 016–80 965
8 723–19 015
< 8 723

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 de נחל אלכסנדר : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 75 interactions GloBI sur 4 types (connectance 10.7%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
75
Connectance
0.107
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°

19,7°C

Annual rain

568mm

Moisture idx (CMI)

-0,57

Runoff

233mm/an

PET

1 310mm

AET

477mm

Mean slope

4,6°

Water table

303cm

Forest

18%

Crops

49%

Urban

47%

Protected

4%

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