Ontologia

Rivière· 14 segments

Oker

Crosses 7 administrative regions : Braunschweig, Celle, Gifhorn, Goslar, Peine +2

rivière

Total length

137km

Max discharge

30m³/s

Max Strahler

5

Segments matched

14

River geography7 admin regions · 0 communes

Parent watershed

hybas-20803585307817 km²

7 administrative regions crossed (GADM L2)

  • Braunschweig
    Niedersachsen · Germany
    18.3 km
    in this dpt
  • Gifhorn
    Niedersachsen · Germany
    18.1 km
    in this dpt
  • Wolfenbüttel
    Niedersachsen · Germany
    16.5 km
    in this dpt
  • Goslar
    Niedersachsen · Germany
    14.3 km
    in this dpt
  • Celle
    Niedersachsen · Germany
    3.5 km
    in this dpt
  • Peine
    Niedersachsen · Germany
    0.7 km
    in this dpt
  • Salzgitter
    Niedersachsen · Germany
    0.0 km
    in this dpt

29 intersecting protected areas

20 more protected areas

1 page = 1 named river (aggregation of 14 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

1 263 distinct species · 5 274 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 37 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 Oker : 25 espèces reliées par 114 interactions GloBI sur 5 types (connectance 16.2%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
114
Connectance
0.162
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

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

Hydrology (HydroRIVERS v10)

Total length

137km

Max discharge

30,0m³/s

Max Strahler

5

Segments matched

14

HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.