Ontologia

Municipality · NLD

Velsen

Netherlands

CfbTemperate, no dry season, warm summer(100 %)

Species observed

4 994

Observations

125 810

Area

51km²

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 Velsen : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 127 interactions GloBI sur 5 types (connectance 14.8%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
42
Interactions affichées
127
Connectance
0.147
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Species present

4 994 distinct species · 125 810 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

125 810 obs · 1 cellules
Obs. / cellule
≥ 125 810
125 810–125 809
125 810–125 809
125 810–125 809
< 125 810

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

Climate

Mean T°

10,3°C

Annual rain

946mm

Warmest m°

19,3°C

Coldest m°

2,2°C

Elevation: 4 m on average (min -15 m, max 13 m)

Bioclimatic detailsExpert
Annual mean temp.
10,3°C
Annual rain
946mm
Warmest month
19,3°C
Coldest month
2,2°C
Mean alt.
4m
Min
-15m
Max
13m
Std. dev.
4m
Köppen-Geiger (dominant)
CfbTemperate, no dry season, warm summer(100 %)Temperate

CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)

Soil & lithology

pH H₂O

6,4

Org. C

46,2g/kg

Clay

7,7%

Sand

84,3%

Silt

8,0%

Average over 0-30 cm. Per-depth details in expert panel.

Dominant lithology: suGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,2
Org. C
68,7g/kg
Clay
7,6%
Sand
84,6%
Silt
7,9%
5–15 cm
pH H₂O
6,5
Org. C
40,5g/kg
Clay
8,0%
Sand
84,2%
Silt
7,8%
15–30 cm
pH H₂O
6,6
Org. C
29,4g/kg
Clay
7,6%
Sand
84,1%
Silt
8,4%

SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)

Land cover

Forest24.3%
Crops10.9%
Built-up7.2%
Bare soil0.9%
Other (grassland, water…)56.8%

Copernicus Global Land Cover 100m (Buchhorn et al. 2020)

Hydrology1 basins · 0 lakes · 3 rivers

Hydrology metrics for this exact territory

Stream length here

8,1km

Basins crossed

1

Max stream order

2

Max drainage

1 905km²

Discharge in basins

0,0m³/s

Mean precip.

782mm/an

Mean T°

9,0°C

Moisture idx

0,28

Max snow

11%

Mean runoff

490mm/an

Mean elev. (basins)

0m

Watersheds crossing here

Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10

Human pressure

Pop. density

7hab/km²

Night light

16,4nW

Built-up

715,2%

Pesticides

50,1kg/km²

GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)

Protected areas6

IUCN Not Reported · 2IUCN IV · 2IUCN Not Assigned · 1IUCN II · 1🌊 Marine · 1

NNN-NH

IUCN Not Assigned

Nature Reserves owned by professional nature management organizations · 2018

566 km²

Kennemerland-Zuid

IUCN Not Reported

Special Areas of Conservation (Habitats Directive) · 2013

82 km²

WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN