Ontologia

Rivière· 9 segments

Großer Graben

Crosses 4 administrative regions : Börde, Harz, Helmstedt, Wolfenbüttel

rivière

Total length

82km

Max discharge

4,9m³/s

Max Strahler

4

Segments matched

9

River geography4 admin regions · 0 communes

Parent watershed

hybas-2080377770793 km²

4 administrative regions crossed (GADM L2)

  • Harz
    Sachsen-Anhalt · Germany
    30.7 km
    in this dpt
  • Börde
    Sachsen-Anhalt · Germany
    12.4 km
    in this dpt
  • Helmstedt
    Niedersachsen · Germany
    6.8 km
    in this dpt
  • Wolfenbüttel
    Niedersachsen · Germany
    3.0 km
    in this dpt

19 intersecting protected areas

10 more protected areas

1 page = 1 named river (aggregation of 9 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

550 distinct species · 989 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 46 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 Großer Graben : 32 espèces reliées par 118 interactions GloBI sur 5 types (connectance 11.4%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
46
Interactions affichées
118
Connectance
0.114
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

82km

Max discharge

4,9m³/s

Max Strahler

4

Segments matched

9

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