Ruisseau· 22 segments
Tirza
Crosses 3 administrative regions : Cesis, Gulbene, Madona
Total length
103km
Max discharge
6,7m³/s
Max Strahler
3
Segments matched
22
River geography3 admin regions · 0 communes
3 administrative regions crossed (GADM L2)
2 intersecting protected areas
Audulītes staignāju meži
IUCN IVNature Reserve
Druvienas alejas
IUCN IIINature Monument
1 page = 1 named river (aggregation of 22 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
141 distinct species · 175 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 27 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 Tirza : 18 espèces reliées par 64 interactions GloBI sur 4 types (connectance 15.8%, filtre Serrano α=0.2). 11 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
103km
Max discharge
6,7m³/s
Max Strahler
3
Segments matched
22
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.