Ontologia

Rivière· 25 segments

Bear River

Crosses 7 administrative regions : Amador, Calaveras, El Dorado, Nevada, Placer +2

rivière

Total length

1 709km

Max discharge

20,9m³/s

Max Strahler

4

Segments matched

25

River geography7 admin regions · 0 communes

Parent watershed

hybas-70805666101209 km²

7 administrative regions crossed (GADM L2)

  • Nevada
    California · United States
    47.0 km
    in this dpt
  • Placer
    California · United States
    40.9 km
    in this dpt
  • Amador
    California · United States
    28.9 km
    in this dpt
  • Sutter
    California · United States
    15.3 km
    in this dpt
  • Yuba
    California · United States
    11.0 km
    in this dpt
  • Calaveras
    California · United States
    0.3 km
    in this dpt
  • El Dorado
    California · United States
    0.0 km
    in this dpt

3 intersecting protected areas

1 page = 1 named river (aggregation of 25 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

468 distinct species · 4 040 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 49 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 Bear River : 31 espèces reliées par 125 interactions GloBI sur 4 types (connectance 10.2%, filtre Serrano α=0.2). 19 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
50
Interactions affichées
125
Connectance
0.102
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

1 709km

Max discharge

20,9m³/s

Max Strahler

4

Segments matched

25

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