Ontologia

HydroBASINS lev08 watershed · #2080023220

Bassin de Beemsterringvaart

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 29 administrative regions : Aalsmeer, Alkmaar, Amstelveen, Amsterdam, Beemster +24

13% lakePfafstetter: 23270104

Sub-basin area

794,8km²

Upstream area

794,8km²

Discharge

13m³/s

Mean elev.

-2m

Administrative coverage

29 dept-equivalent regions (GADM L2)

21 more

17 intersecting protected areas

8 more protected areas

  • Polder Westzaan

    IUCN IV

    Nature Conservation Act

    10.57 km² overlap

  • Polder Westzaan

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    10.57 km² overlap

  • Eilandspolder

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    7.98 km² overlap

  • Polder Zeevang

    IUCN IV

    Nature Conservation Act

    7.20 km² overlap

  • Polder Zeevang

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    7.20 km² overlap

  • Noordhollands Duinreservaat

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    4.64 km² overlap

  • Noordhollands Duinreservaat

    IUCN IV

    Nature Conservation Act

    4.64 km² overlap

  • NNN-UT

    IUCN Not Assigned

    Nature Reserves owned by professional nature management organizations

    0.52 km² overlap

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

Species present

15 933 distinct species · 6 256 660 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

6 256 660 obs · 46 cellules
Obs. / cellule
≥ 706 696
261 464–706 695
174 093–261 463
115 871–174 092
< 115 871

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

Ecological tissue

Sample of 36 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 Beemsterringvaart : 15 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 230 interactions GloBI sur 5 types (connectance 14.4%, filtre Serrano α=0.2). 42 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
57
Interactions affichées
230
Connectance
0.144
Patrimoniales
2
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°

9,2°C

Annual rain

792mm

Moisture idx (CMI)

0,24

Runoff

489mm/an

PET

603mm

AET

497mm

Mean slope

0,2°

Water table

5cm

Forest

2%

Crops

16%

Urban

58%

Protected

10%

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