Wadden Sea
IUCN Not ApplicableWorld Heritage Site (natural or mixed) · 2009
11 574 km²
Municipality · NLD
Hollands Kroon
Netherlands
CfbTemperate, no dry season, warm summer(100 %)
Species observed
5 985
Observations
930 264
Area
379,1km²
Ecological tissue
Sample of 39 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 Hollands Kroon : 31 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 73 interactions GloBI sur 4 types (connectance 9.9%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
39
Interactions affichées
73
Connectance
0.099
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
5 985 distinct species · 930 264 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
10,3°C
Annual rain
868mm
Warmest m°
19,1°C
Coldest m°
2,3°C
Elevation: -3 m on average (min -5 m, max 3 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
10,3°C
Annual rain
868mm
Warmest month
19,1°C
Coldest month
2,3°C
Mean alt.
-3m
Min
-5m
Max
3m
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
7,0
Org. C
55,9g/kg
Clay
28,8%
Sand
31,9%
Silt
39,3%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: suGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,9
Org. C
76,6g/kg
Clay
28,2%
Sand
32,4%
Silt
39,4%
5–15 cm
pH H₂O
7,0
Org. C
37,7g/kg
Clay
28,1%
Sand
32,5%
Silt
39,4%
15–30 cm
pH H₂O
7,0
Org. C
53,5g/kg
Clay
30,2%
Sand
30,7%
Silt
39,1%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest4.8%
Crops60.2%
Built-up1.8%
Bare soil0.9%
Other (grassland, water…)32.4%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology1 basins · 4 lakes · 20 rivers
Hydrology metrics for this exact territory
Stream length here
88,1km
Lake surface here
7,64km²
Basins crossed
1
Max stream order
3
Max drainage
1 905km²
Discharge in basins
0,1m³/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
Lakes (4, top by area)
Rivers / streams (20, ord ≥ 4)
- Ringslootord 2len here16.09 km68%total24 km
- Waardkanaalord 3len here12.65 km99%total13 km
- Robbevaartord 2len here8.81 km100%total9 km
- Van Ewijcksvaartord 1len here6.75 km100%total7 km
- Kanaal Schagen-Kolhornord 1len here6.18 km70%total9 km
- Hoekvaartord 1len here5.92 km100%total6 km
- Westfriesche Vaartord 1len here4.95 km100%total5 km
- Oudelandertochtord 1len here4.57 km99%total5 km
- Groetkanaalord 2len here4.28 km100%total4 km
- Molenvaartord 3len here4.10 km100%total4 km
- Aartswouder Hoofdwijkord 1len here3.57 km100%total4 km
- Den Oeversche Vaartord 2len here2.97 km100%total3 km
8 more river segmentssorted by Strahler order + length
- Balgzandkanaalord 3len here2.63 km83%total3 km
- Waardtochtord 1len here2.48 km100%total2 km
- Ooster Egalementslootord 3len here0.81 km8%total10 km
- Kolhornerdiepord 2len here0.54 km100%total1 km
- Dieringerord 1len here0.39 km8%total5 km
- Langevlietord 1len here0.34 km10%total4 km
- Scheidingsvlietord 1len here0.01 km0%total2 km
- Westerhavenord 2len here≈ tangenttotal1 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
3,2nW
Built-up
175,3%
Pesticides
56,1kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas10
IUCN IV · 4IUCN Not Reported · 3IUCN Not Applicable · 2IUCN Not Assigned · 1🌊 Marine · 10
Waddenzee
IUCN IVNature Conservation Act · 2009
2 718 km²
Waddenzee
IUCN Not ReportedSpecial Protection Area (Birds Directive) · 1991
2 718 km²
Wadden Sea
IUCN IVWetland of International Importance (Ramsar Site) · 1984
2 710 km²
Waddenzee
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2009
2 648 km²
Waddensea Area
IUCN Not ApplicableUNESCO-MAB Biosphere Reserve · 1986
2 435 km²
Complete list10 protected areas
- Wadden SeaWorld Heritage Site (natural or mixed)IUCN Not Applicable200911 574 km²
- WaddenzeeNature Conservation ActIUCN IV20092 718 km²
- WaddenzeeSpecial Protection Area (Birds Directive)IUCN Not Reported19912 718 km²
- Wadden SeaWetland of International Importance (Ramsar Site)IUCN IV19842 710 km²
- WaddenzeeSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20092 648 km²
- Waddensea AreaUNESCO-MAB Biosphere ReserveIUCN Not Applicable19862 435 km²
- IJsselmeerWetland of International Importance (Ramsar Site)IUCN IV20001 134 km²
- IJsselmeerNature Conservation ActIUCN IV20101 134 km²
- IJsselmeerSpecial Protection Area (Birds Directive)IUCN Not Reported20001 134 km²
- NNN-NHNature Reserves owned by professional nature management organizationsIUCN Not Assigned2018566 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN