Ontologia

Municipality · NLD

Haarlem

Netherlands

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

Species observed

7 180

Observations

437 188

Area

32,4km²

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 Haarlem : 34 espèces reliées par 90 interactions GloBI sur 6 types (connectance 11.0%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
90
Connectance
0.110
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

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

Species present

7 180 distinct species · 437 188 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

437 188 obs · 2 cellules
Obs. / cellule
≥ 331 055
331 055–331 054
331 055–331 054
331 055–331 054
< 331 055

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

936mm

Warmest m°

19,6°C

Coldest m°

2,0°C

Elevation: 0 m on average (min -4 m, max 8 m)

Bioclimatic detailsExpert
Annual mean temp.
10,3°C
Annual rain
936mm
Warmest month
19,6°C
Coldest month
2,0°C
Mean alt.
0m
Min
-4m
Max
8m
Std. dev.
2m
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

6,2

Org. C

44,1g/kg

Clay

10,9%

Sand

74,7%

Silt

14,4%

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

Dominant lithology: suGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,9
Org. C
67,8g/kg
Clay
10,9%
Sand
75,2%
Silt
14,0%
5–15 cm
pH H₂O
6,3
Org. C
39,4g/kg
Clay
10,6%
Sand
75,1%
Silt
14,3%
15–30 cm
pH H₂O
6,4
Org. C
24,9g/kg
Clay
11,3%
Sand
73,9%
Silt
14,8%

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

Land cover

Forest9.1%
Crops6.8%
Built-up11.8%
Bare soil0.3%
Other (grassland, water…)72.1%

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

Hydrology2 basins · 2 lakes · 3 rivers

Hydrology metrics for this exact territory

Stream length here

11,3km

Lake surface here

1,39km²

Basins crossed

2

Max stream order

2

Max drainage

1 905km²

Discharge in basins

0,0m³/s

Mean precip.

783mm/an

Mean T°

9,0°C

Moisture idx

0,27

Max snow

11%

Mean runoff

490mm/an

Mean elev. (basins)

-0m

Watersheds crossing here

Lakes (2, top by area)

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

Human pressure

Pop. density

25hab/km²

Night light

14,8nW

Built-up

1 175,8%

Pesticides

52,1kg/km²

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

Protected areas4

IUCN Not Assigned · 1IUCN Not Reported · 1IUCN IV · 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