Wadden Sea
IUCN Not ApplicableWorld Heritage Site (natural or mixed) · 2009
11 574 km²
Province · nld
Fryslân
Netherlands
CfbTemperate, no dry season, warm summer(100 %)
Species observed
13 077
Observations
5 298 295
Area
3 580km²
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 Fryslân : 33 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 83 interactions GloBI sur 6 types (connectance 10.6%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
40
Interactions affichées
83
Connectance
0.106
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
13 077 distinct species · 5 298 295 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
9,8°C
Annual rain
886mm
Warmest m°
19,8°C
Coldest m°
1,1°C
Elevation: 1 m on average (min -10 m, max 15 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
9,8°C
Annual rain
886mm
Warmest month
19,8°C
Coldest month
1,1°C
Mean alt.
1m
Min
-10m
Max
15m
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
6,5
Org. C
82,8g/kg
Clay
28,9%
Sand
31,5%
Silt
39,6%
Average over 0-30 cm. Per-depth details in expert panel.
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,3
Org. C
95,3g/kg
Clay
28,3%
Sand
32,2%
Silt
39,6%
5–15 cm
pH H₂O
6,5
Org. C
58,6g/kg
Clay
28,3%
Sand
32,1%
Silt
39,6%
15–30 cm
pH H₂O
6,5
Org. C
94,5g/kg
Clay
30,1%
Sand
30,2%
Silt
39,7%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest9.2%
Crops44.0%
Built-up1.4%
Bare soil0.9%
Other (grassland, water…)44.5%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology8 basins · 50 lakes · 94 rivers
Hydrology metrics for this exact territory
Stream length here
662,6km
Lake surface here
132,02km²
Basins crossed
8
Max stream order
4
Max drainage
5 867km²
Discharge in basins
37,2m³/s
Mean precip.
790mm/an
Mean T°
8,8°C
Moisture idx
0,22
Max snow
14%
Mean runoff
476mm/an
Mean elev. (basins)
0m
Watersheds crossing here
- Bassin de Van Harinxmakanaalsub-area1 453,9 km²overlap1423.72 km²40%
- Bassin de Prinses Margrietkanaalsub-area889,5 km²overlap893.07 km²25%
- Bassin de De Tsjonger of De Kuundersub-area924,7 km²overlap682.88 km²19%
- Bassin de Reitdiepsub-area1 611,6 km²overlap325.58 km²9%
- Bassin de Ringslootsub-area1 905,4 km²overlap239.05 km²7%
- Bassin de Vledder- en Wapserveensche Aasub-area382,3 km²overlap6.83 km²0%
- Basin #23380sub-area2,2 km²overlap1.46 km²0%
- Bassin de Hunzesub-area1 455,9 km²overlap0.66 km²0%
Lakes (50, top by area)
- Ijsselmeerarea1 962,7 km²avg depth4.5 m
- Lauwersmeerarea21,4 km²avg depth3.3 m
- Heegermeerarea20,1 km²avg depth1.0 m
- Tjeukemeerarea19,3 km²avg depth1.0 m
- Sneekermeerarea11,1 km²avg depth1.0 m
- Slotermeerarea10,7 km²avg depth1.0 m
- Burgumer Mararea4 km²avg depth1.0 m
- Koevordermeerarea3,4 km²avg depth0.9 m
- Zwarte Brekkenarea3,2 km²avg depth1.4 m
41 more lakes
- Terkaplesterpoelenarea3 km²avg depth0.7 m
- Groote Brekkenarea2,9 km²avg depth0.8 m
- Doelesleatarea2,9 km²avg depth0.9 m
- De Leijenarea2,8 km²avg depth1.0 m
- Vlakke Brekkenarea2,7 km²avg depth0.9 m
- Langwarder Wielenarea2,2 km²avg depth0.8 m
- Morraarea1,9 km²avg depth0.7 m
- Wijde Eearea1,5 km²avg depth0.5 m
- Lake #64231area1,3 km²avg depth0.5 m
- Grutte Kritearea1,2 km²avg depth0.7 m
- Idzegaasterpoelarea1,1 km²avg depth0.7 m
- Groote Gaastmeerarea1,1 km²avg depth0.6 m
- Ringwielarea1 km²avg depth0.6 m
- Lac 1325846area0,9 km²avg depth1.6 m
- Lac 1325197area0,9 km²avg depth1.3 m
- Lac 1325899area0,9 km²avg depth1.4 m
- Lac 1326506area0,8 km²avg depth1.4 m
- Lac 1326998area0,8 km²avg depth1.6 m
- Lac 1326669area0,8 km²avg depth1.7 m
- Lac 1324435area0,7 km²avg depth2.1 m
- Lac 1325441area0,7 km²avg depth1.4 m
- Lac 1325694area0,7 km²avg depth1.5 m
- Lac 1325811area0,6 km²avg depth1.5 m
- Lac 1325817area0,5 km²avg depth1.5 m
- Lac 1326986area0,5 km²avg depth1.3 m
- Lac 1325731area0,4 km²avg depth1.4 m
- Lac 1325239area0,4 km²avg depth1.4 m
- Lac 1325641area0,4 km²avg depth1.4 m
- Lac 1325806area0,3 km²avg depth1.2 m
- Lac 1326337area0,3 km²avg depth1.0 m
- Lac 1326284area0,3 km²avg depth1.4 m
- Lac 1326803area0,3 km²avg depth1.2 m
- Lac 1327075area0,3 km²avg depth1.4 m
- Lac 1326969area0,3 km²avg depth1.3 m
- Lac 1325617area0,3 km²avg depth1.1 m
- Lac 1325517area0,3 km²avg depth1.1 m
- Lac 1324918area0,3 km²avg depth1.2 m
- Lac 1327213area0,3 km²avg depth1.3 m
- Lac 1326997area0,3 km²avg depth1.2 m
- Lac 1325992area0,3 km²avg depth1.1 m
- Lac 1326282area0,3 km²avg depth1.4 m
Rivers / streams (94, ord ≥ 4)
- Prinses Margrietkanaalord 4len here39.78 km100%total40 km
- De Tsjonger of De Kuunderord 3len here30.99 km100%total31 km
- De Lendeord 2len here22.35 km87%total26 km
- Ald- of Keningsdjipord 2len here19.85 km100%total20 km
- Van Harinxmakanaalord 4len here19.10 km100%total19 km
- Dokkumer Djipord 4len here18.81 km97%total19 km
- Opsterlandse Compagnonsvaartord 2len here17.93 km100%total18 km
- Lange Rakord 1len here15.54 km100%total16 km
- Nije Feartord 2len here15.11 km100%total15 km
- Streamkanaalord 4len here13.49 km99%total14 km
- De Litsord 2len here13.17 km100%total13 km
- Wide Wimertsord 2len here13.09 km100%total13 km
82 more river segmentssorted by Strahler order + length
- Hijumer Feartord 2len here12.37 km100%total12 km
- Kromme Ieord 3len here11.71 km100%total12 km
- Harnzer Feartord 3len here11.17 km100%total11 km
- Boalserter Feartord 2len here11.01 km100%total11 km
- Arumer Feartord 3len here10.78 km100%total11 km
- Dokkumer Ieord 3len here10.58 km100%total11 km
- Nieuwe Vaartord 2len here10.48 km93%total11 km
- Verbindingskanaalord 1len here10.42 km100%total10 km
- De Wimertsord 3len here9.66 km100%total10 km
- Schipslootord 2len here9.51 km100%total9 km
- Aldmearord 3len here9.07 km100%total9 km
- De Moarkord 2len here9.01 km100%total9 km
- Weteringord 1len here8.70 km100%total9 km
- Falomster Feartord 1len here8.65 km100%total9 km
- Dokkumer Grutdjipord 1len here8.59 km100%total9 km
- Alddjipord 3len here8.59 km100%total9 km
- Harlingertrekvaartord 3len here8.59 km100%total9 km
- Grootdiepord 1len here8.33 km100%total8 km
- De Swetteord 1len here7.63 km100%total8 km
- Helomafeartord 3len here7.61 km80%total10 km
- Monnike Eeord 2len here7.48 km100%total7 km
- Prinses Margrietkanaalord 2len here7.43 km100%total7 km
- Jouster vaartord 4len here7.08 km100%total7 km
- Lange Sleatord 1len here7.06 km100%total7 km
- Molkfeartord 1len here6.84 km96%total7 km
- Ultsjebuorster Opfeartord 2len here6.39 km100%total6 km
- Tersoalster Sylroedeord 4len here6.27 km100%total6 km
- Keegenster Rydord 1len here6.15 km100%total6 km
- Jeltesleatord 2len here5.95 km100%total6 km
- Tsjommer Feartord 1len here5.83 km100%total6 km
- Frjentsjerter Feartord 1len here5.82 km100%total6 km
- Jislumer Feartord 2len here5.74 km100%total6 km
- Jaansleatord 1len here5.50 km100%total5 km
- Aldrijord 1len here5.37 km100%total5 km
- Súdhoekster Faartord 1len here5.33 km100%total5 km
- Prinsewiekord 2len here5.21 km100%total5 km
- Wiiddraaiord 3len here5.21 km100%total5 km
- Jonkerswijkord 1len here4.84 km60%total8 km
- Johan Frisokanaalord 1len here4.79 km100%total5 km
- Feansterfeartord 1len here4.64 km100%total5 km
- Miedumer Djipord 3len here4.63 km100%total5 km
- Alde Rydord 3len here4.57 km100%total5 km
- Wielster Feartord 1len here4.56 km100%total5 km
- Warkumer Trekfeartord 1len here4.54 km100%total5 km
- It Wiidord 1len here4.44 km100%total4 km
- Noordwooldervaortord 2len here4.39 km100%total4 km
- De Mearord 1len here4.29 km100%total4 km
- Kromme Grouord 1len here4.17 km100%total4 km
- Rypster Feartord 1len here3.99 km100%total4 km
- Dyksgreftord 1len here3.90 km100%total4 km
- Alddjipord 1len here3.90 km100%total4 km
- Goaiumer Feartord 1len here3.73 km94%total4 km
- Easterbierrumer Feartord 1len here3.47 km99%total4 km
- Hearreweister Feartord 2len here3.46 km100%total3 km
- Bûtenpostmer Feartord 1len here3.43 km100%total3 km
- Reitdiepord 4len here3.33 km12%total29 km
- Ultjsemearord 3len here3.32 km100%total3 km
- Tsjettelfeartord 1len here3.02 km94%total3 km
- Noordwoldervaartord 1len here2.89 km100%total3 km
- Gaaster Feartord 1len here2.84 km90%total3 km
- Nije Kanaalord 1len here2.76 km100%total3 km
- Skrokfeartord 1len here2.75 km100%total3 km
- Dyksfeartord 1len here2.70 km100%total3 km
- Folkertssleatord 2len here2.48 km100%total2 km
- De Peazensord 1len here2.45 km98%total3 km
- Van Starkenborghkanaalord 4len here2.32 km8%total27 km
- Hallumer Feartord 1len here2.28 km100%total2 km
- Kûkhernster Feartord 1len here2.16 km100%total2 km
- Aldfeartord 1len here2.11 km81%total3 km
- Nije Faartord 1len here2.02 km97%total2 km
- Jaanfeartord 2len here1.82 km100%total2 km
- Pikmeer-oostord 3len here1.64 km100%total2 km
- Feanskiedingord 1len here1.62 km100%total2 km
- Nauwe Greonsord 1len here1.35 km100%total1 km
- Oude Diepord 1len here1.18 km12%total10 km
- Westerfaartord 1len here0.83 km67%total1 km
- Ossenzijlerslootord 2len here0.77 km26%total3 km
- Lindeord 2len here0.59 km17%total3 km
- Dwarsdiepord 2len here0.53 km3%total16 km
- Zoutkamperrilord 1len here0.42 km23%total2 km
- Robbengatsluisord 1len here0.32 km7%total5 km
- Portugalslootord 1len here≈ tangenttotal3 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
1,0nW
Built-up
135,0%
Pesticides
50,8kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas78
IUCN Not Reported · 34IUCN IV · 30IUCN II · 7IUCN Not Assigned · 5IUCN Not Applicable · 2🌊 Marine · 30
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 list78 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
- NNN-FRNature Reserves owned by professional nature management organizationsIUCN Not Assigned20142 178 km²
- NoordzeekustzoneNature Conservation ActIUCN IV20101 445 km²
- North Sea Coastal AreaWetland of International Importance (Ramsar Site)IUCN IV20001 445 km²
- NoordzeekustzoneSpecial Protection Area (Birds Directive)IUCN Not Reported20001 445 km²
- NoordzeekustzoneSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20091 445 km²
- NoordzeekustzoneMarine Protected Area (OSPAR)IUCN Not Reported20091 416 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-GRNature Reserves owned by professional nature management organizationsIUCN Not Assigned2016774 km²
- NNN-DRNature Reserves owned by professional nature management organizationsIUCN Not Assigned2015716 km²
- NNN-OVNature Reserves owned by professional nature management organizationsIUCN Not Assigned2017632 km²
- NNN-FLNature Reserves owned by professional nature management organizationsIUCN Not Assigned2010263 km²
- Drents-Friese Wold & LeggelderveldNature Conservation ActIUCN IV201075 km²
- Drents-Friese Wold & LeggelderveldSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201175 km²
- SchiermonnikoogNational ParkIUCN II198968 km²
- Drents-Friese Wold & LeggelderveldSpecial Protection Area (Birds Directive)IUCN Not Reported200068 km²
- LauwersmeerNational ParkIUCN II200360 km²
- LauwersmeerSpecial Protection Area (Birds Directive)IUCN Not Reported200058 km²
- LauwersmeerNature Conservation ActIUCN IV201058 km²
- LauwersmeerWetland of International Importance (Ramsar Site)IUCN II200058 km²
- Drents-Friese WoldNational ParkIUCN II199956 km²
- Duinen TerschellingWetland of International Importance (Ramsar Site)IUCN IV200041 km²
- Duinen TerschellingSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported200940 km²
- Duinen TerschellingNature Conservation ActIUCN IV200940 km²
- Duinen TerschellingSpecial Protection Area (Birds Directive)IUCN Not Reported200036 km²
- De Alde FeanenNational ParkIUCN II200634 km²
- Oudegaasterbrekken, Fluessen en omgevingNature Conservation ActIUCN IV201031 km²
- Oudegaasterbrekken, Fluessen and surroundingsWetland of International Importance (Ramsar Site)IUCN IV200031 km²
- Oudegaasterbrekken, Fluessen en omgevingSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201131 km²
- Oudegaasterbrekken, Fluessen en omgevingSpecial Protection Area (Birds Directive)IUCN Not Reported200029 km²
- FochteloërveenNature Conservation ActIUCN IV199826 km²
- FochteloërveenSpecial Protection Area (Birds Directive)IUCN Not Reported199826 km²
- FochteloërveenSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201326 km²
- IJsselmeerSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201024 km²
- SneekermeergebiedWetland of International Importance (Ramsar Site)IUCN IV200023 km²
- SneekermeergebiedNature Conservation ActIUCN IV201023 km²
- SneekermeergebiedSpecial Protection Area (Birds Directive)IUCN Not Reported200023 km²
- Alde FeanenWetland of International Importance (Ramsar Site)IUCN II199221 km²
- Alde FeanenNature Conservation ActIUCN IV199421 km²
- Alde FeanenSpecial Protection Area (Birds Directive)IUCN Not Reported199421 km²
- Alde FeanenSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201321 km²
- Duinen AmelandWetland of International Importance (Ramsar Site)IUCN IV200021 km²
- Duinen AmelandSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported200921 km²
- Duinen AmelandSpecial Protection Area (Birds Directive)IUCN Not Reported200021 km²
- Duinen AmelandNature Conservation ActIUCN IV200921 km²
- Duinen VlielandWetland of International Importance (Ramsar Site)IUCN IV200015 km²
- Duinen VlielandNature Conservation ActIUCN IV200915 km²
- Duinen VlielandSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported200915 km²
- Rottige Meenthe & BrandemeerSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201314 km²
- Rottige Meenthe and BrandemeerWetland of International Importance (Ramsar Site)IUCN IV200014 km²
- Rottige Meenthe & BrandemeerNature Conservation ActIUCN IV201314 km²
- Duinen VlielandSpecial Protection Area (Birds Directive)IUCN Not Reported200013 km²
- Duinen SchiermonnikoogWetland of International Importance (Ramsar Site)IUCN II20008 km²
+ 18 protected areas (top 60 shown)
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN
Sub-administrations18
- AchtkarspelenMunicipality
- AmelandMunicipality
- DantumadeelMunicipality
- De Fryske MarrenMunicipality
- HarlingenMunicipality
- HeerenveenMunicipality
- LeeuwardenMunicipality
- Noardeast-FryslânMunicipality
- OoststellingwerfMunicipality
- OpsterlandMunicipality
- SchiermonnikoogMunicipality
- SmallingerlandMunicipality
- Súdwest-FryslânMunicipality
- TerschellingMunicipality
- TytsjerksteradielMunicipality
- VlielandMunicipality
- WaadhoekeMunicipality
- WeststellingwerfMunicipality