Ontologia

HydroBASINS lev08 watershed · #2080023450

Bassin de Reitdiep

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 17 administrative regions : Aa en Hunze, Achtkarspelen, Assen, Borger-Odoorn, Coevorden +12

17% lakePfafstetter: 23270306

Sub-basin area

1 611,6km²

Upstream area

1 611,6km²

Discharge

28,58m³/s

Mean elev.

3m

Administrative coverage

17 dept-equivalent regions (GADM L2)

9 more

30 intersecting protected areas

  • Drentsche Aa

    IUCN II

    National Park

    251.42 km² overlap

  • NNN-DR

    IUCN Not Assigned

    Nature Reserves owned by professional nature management organizations

    247.65 km² overlap

  • NNN-GR

    IUCN Not Assigned

    Nature Reserves owned by professional nature management organizations

    84.08 km² overlap

  • Lauwersmeer

    IUCN II

    National Park

    56.04 km² overlap

  • Lauwersmeer

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    52.98 km² overlap

  • Lauwersmeer

    IUCN IV

    Nature Conservation Act

    52.98 km² overlap

  • Lauwersmeer

    IUCN II

    Wetland of International Importance (Ramsar Site)

    52.98 km² overlap

  • NNN-FR

    IUCN Not Assigned

    Nature Reserves owned by professional nature management organizations

    41.18 km² overlap

  • Drentsche Aa-gebied

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    38.42 km² overlap

21 more protected areas

  • Drentsche Aa-gebied

    IUCN IV

    Nature Conservation Act

    38.42 km² overlap

  • Leekstermeergebied

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    15.43 km² overlap

  • Leekstermeergebied

    IUCN IV

    Nature Conservation Act

    15.43 km² overlap

  • Leekstermeergebied

    IUCN IV

    Wetland of International Importance (Ramsar Site)

    15.43 km² overlap

  • Fochteloërveen

    IUCN IV

    Nature Conservation Act

    13.53 km² overlap

  • Fochteloërveen

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    13.52 km² overlap

  • Fochteloërveen

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    13.52 km² overlap

  • Witterveld

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    4.20 km² overlap

  • Witterveld

    IUCN IV

    Nature Conservation Act

    4.20 km² overlap

  • Elperstroomgebied

    IUCN IV

    Nature Conservation Act

    3.51 km² overlap

  • Elperstroomgebied

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    3.51 km² overlap

  • Bakkeveense Duinen

    IUCN IV

    Nature Conservation Act

    1.53 km² overlap

  • Bakkeveense Duinen

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    1.53 km² overlap

  • Waddensea Area

    IUCN Not Applicable

    UNESCO-MAB Biosphere Reserve

    0.41 km² overlap

  • Norgerholt

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.26 km² overlap

  • Norgerholt

    IUCN IV

    Nature Conservation Act

    0.26 km² overlap

  • Wadden Sea

    IUCN Not Applicable

    World Heritage Site (natural or mixed)

    0.07 km² overlap

  • Waddenzee

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.07 km² overlap

  • Waddenzee

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    0.07 km² overlap

  • Wadden Sea

    IUCN IV

    Wetland of International Importance (Ramsar Site)

    0.07 km² overlap

  • Waddenzee

    IUCN IV

    Nature Conservation Act

    0.07 km² overlap

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

Species present

14 048 distinct species · 6 436 211 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

6 436 211 obs · 84 cellules
Obs. / cellule
≥ 325 959
201 830–325 958
77 234–201 829
45 716–77 233
< 45 716

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

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 Bassin de Reitdiep : 32 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) + 7 bulles famille, 73 interactions GloBI documentées sur 5 types (connectance 9.9%, filtre Serrano α=0.2). Les 7 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

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).

Hydroclimate (BasinATLAS lev08)

Mean T°

8,7°C

Annual rain

793mm

Moisture idx (CMI)

0,18

Runoff

477mm/an

PET

646mm

AET

526mm

Mean slope

0,2°

Water table

10cm

Forest

4%

Crops

27%

Urban

12%

Protected

13%

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