Ontologia

Rivière· 18 segments

La Seiche

Crosses 2 administrative regions : Ille-et-Vilaine, Mayenne

rivière

Total length

103km

Max discharge

11,6m³/s

Max Strahler

4

Segments matched

18

River geography2 admin regions · 32 communes

Parent watershed

hybas-2080481490817 km²

2 administrative regions crossed (GADM L2)

  • Ille-et-Vilaine
    Bretagne · France
    79.4 km
    in this dpt
  • Mayenne
    Pays de la Loire · France
    3.4 km
    in this dpt
32 communes (L5)

1 page = 1 named river (aggregation of 18 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

862 distinct species · 3 389 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 56 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 La Seiche : 17 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 307 interactions GloBI sur 6 types (connectance 10.8%, filtre Serrano α=0.2). 59 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
76
Interactions affichées
307
Connectance
0.108
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

103km

Max discharge

11,6m³/s

Max Strahler

4

Segments matched

18

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