Ontologia

Rivière· 15 segments

Holzbach

Crosses 16 administrative regions : Altenkirchen (Westerwald), Bischofszell, Calw, Enzkreis, Hochtaunuskreis +11

rivière

Total length

253km

Max discharge

55m³/s

Max Strahler

4

Segments matched

15

River geography16 admin regions · 0 communes

Parent watershed

hybas-20804478401980 km²

16 administrative regions crossed (GADM L2)

  • Westerwaldkreis
    Rheinland-Pfalz · Germany
    13.6 km
    in this dpt
  • Sankt Gallen
    Sankt Gallen · Switzerland
    11.3 km
    in this dpt
  • Neuwied
    Rheinland-Pfalz · Germany
    9.4 km
    in this dpt
  • Merzig-Wadern
    Saarland · Germany
    8.3 km
    in this dpt
  • Wetteraukreis
    Hessen · Germany
    5.9 km
    in this dpt
  • Enzkreis
    Baden-Württemberg · Germany
    3.4 km
    in this dpt
  • Ludwigsburg
    Baden-Württemberg · Germany
    2.9 km
    in this dpt
  • Karlsruhe
    Baden-Württemberg · Germany
    2.6 km
    in this dpt
  • Altenkirchen (Westerwald)
    Rheinland-Pfalz · Germany
    2.4 km
    in this dpt
  • Bischofszell
    Thurgau · Switzerland
    2.4 km
    in this dpt
  • Hochtaunuskreis
    Hessen · Germany
    1.9 km
    in this dpt
  • Neustadt an der Aisch-Bad Windsh
    Bayern · Germany
    1.6 km
    in this dpt
  • Stuttgart
    Baden-Württemberg · Germany
    1.3 km
    in this dpt
  • Rems-Murr-Kreis
    Baden-Württemberg · Germany
    0.4 km
    in this dpt
  • Limburg-Weilburg
    Hessen · Germany
    0.0 km
    in this dpt
  • Calw
    Baden-Württemberg · Germany
    0.0 km
    in this dpt

30 intersecting protected areas

21 more protected areas

1 page = 1 named river (aggregation of 15 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

2 156 distinct species · 54 645 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 Holzbach : 28 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 80 interactions GloBI sur 4 types (connectance 12.0%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
80
Connectance
0.120
Patrimoniales
1
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

253km

Max discharge

55,0m³/s

Max Strahler

4

Segments matched

15

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