Ontologia

Rivière· 11 segments

Alster

Crosses 3 administrative regions : Hamburg, Segeberg, Stormarn

rivière

Total length

84km

Max discharge

8m³/s

Max Strahler

4

Segments matched

11

River geography3 admin regions · 0 communes

Parent watershed

hybas-20800241701727 km²

3 administrative regions crossed (GADM L2)

  • Hamburg
    Hamburg · Germany
    20.9 km
    in this dpt
  • Stormarn
    Schleswig-Holstein · Germany
    11.3 km
    in this dpt
  • Segeberg
    Schleswig-Holstein · Germany
    4.1 km
    in this dpt

22 intersecting protected areas

13 more protected areas

1 page = 1 named river (aggregation of 11 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

2 357 distinct species · 26 556 observations

Source: GBIF Occurrence snapshot 2026-05-01.

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 Alster : 30 espèces reliées par 72 interactions GloBI sur 6 types (connectance 9.7%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
39
Interactions affichées
72
Connectance
0.097
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

84km

Max discharge

8,0m³/s

Max Strahler

4

Segments matched

11

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