Rivière· 3 segments
Чна
Crosses 2 administrative regions : Kulebakskiy rayon, Navashinskiy rayon
Total length
24km
Max discharge
17,3m³/s
Max Strahler
4
Segments matched
3
River geography2 admin regions · 0 communes
2 administrative regions crossed (GADM L2)
- Navashinskiy rayonNizhegorod · Russia13.0 kmin this dpt
- Kulebakskiy rayonNizhegorod · Russia0.0 kmin this dpt
2 intersecting protected areas
Natural Monument
Boloto Pokolevskoe
IUCN IIINatural Monument
1 page = 1 named river (aggregation of 3 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
232 distinct species · 323 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 41 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).
Indicateurs du tissu écologique
Tissu écologique de Чна : 27 espèces reliées par 114 interactions GloBI sur 6 types (connectance 13.2%, filtre Serrano α=0.2). 15 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
24km
Max discharge
17,3m³/s
Max Strahler
4
Segments matched
3
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.