Ontologia

Ruisseau· 5 segments

Ärgera

Crosses 3 administrative regions : La Gruyère, La Sarine, Sense

ruisseau

Total length

17km

Max discharge

2m³/s

Max Strahler

3

Segments matched

5

River geography3 admin regions · 0 communes

Parent watershed

hybas-20805088301867 km²

3 administrative regions crossed (GADM L2)

  • Sense
    Fribourg · Switzerland
    11.3 km
    in this dpt
  • La Sarine
    Fribourg · Switzerland
    5.7 km
    in this dpt
  • La Gruyère
    Fribourg · Switzerland
    2.8 km
    in this dpt

12 intersecting protected areas

  • Petite Sarine

    IUCN IV

    Federal Inventory of Amphibian Spawning Areas of National Importance

  • La Sarine: Rossens-Fribourg

    IUCN IV

    Federal Inventory of Alluvial Zones of National Importance

  • Ärgera: Plasselb-Marly

    IUCN IV

    Federal Inventory of Alluvial Zones of National Importance

  • Ärgera

    IUCN IV

    Federal Inventory of Amphibian Spawning Areas of National Importance

  • Lac de Pérolles (FR)

    IUCN IV

    Federal Inventory of Reserves for Waterbirds and Migratory Birds of International and National Imp.

  • Plasselbschlund

    IUCN IV

    Federal Inventory of Alluvial Zones of National Importance

  • Torry d'Arau

    IUCN IV

    Federal Inventory of Fenlands of National Importance

  • Bois du Dévin

    IUCN IV

    Federal Inventory of Alluvial Zones of National Importance

  • Muschenegg

    IUCN Ia

    Federal Inventory of Raised and Transitional Mires of National Importance

3 more protected areas

1 page = 1 named river (aggregation of 5 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

2 318 distinct species · 21 798 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 33 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 Ärgera : 16 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 124 interactions GloBI sur 5 types (connectance 22.1%, filtre Serrano α=0.2). 18 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
34
Interactions affichées
124
Connectance
0.221
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

17km

Max discharge

2,0m³/s

Max Strahler

3

Segments matched

5

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