Rivière· 26 segments
Nera
Crosses 4 administrative regions : Macerata, Perugia, Terni, Viterbo
Total length
251km
Max discharge
59,6m³/s
Max Strahler
5
Segments matched
26
River geography4 admin regions · 0 communes
4 administrative regions crossed (GADM L2)
- TerniUmbria · Italy56.8 kmin this dpt
- PerugiaUmbria · Italy36.6 kmin this dpt
- MacerataMarche · Italy15.2 kmin this dpt
- ViterboLazio · Italy1.0 kmin this dpt
20 intersecting protected areas
National Park
Monti Sibillini (versante umbro)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Monti Sibillini (versante umbro)
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Valnerina, Montagna di Torricchio, Monte Fema e Monte Cavallo
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Bassa Valnerina: Monte Fionchi - Cascata delle Marmore
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Monti Coscerno - Civitella - Aspra (sommità)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Gola della Valnerina - Monte Fema
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Valle Rapegna e Monte Cardosa
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Valle Rapegna e Monte Cardosa
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
11 more protected areassorted by area
Parco fluviale del Nera
IUCN VRegional/Provincial Nature Park
Monti Galloro - dell'Immagine
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Monti lo Stiglio - Pagliaro
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Monte Solenne (Valnerina)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Monte Maggio (sommità)
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Valnerina
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Lago di San Liberato
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Lago dell'Aia (Narni)
IUCN Not ReportedSpecial Protection Area (Birds Directive)
Gole di Narni - Stifone
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Cascata delle Marmore
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Fiume Vigi
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
1 page = 1 named river (aggregation of 26 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
80 distinct species · 123 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 31 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 Nera : 29 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 31 interactions GloBI sur 5 types (connectance 6.7%, filtre Serrano α=0.2). 2 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
251km
Max discharge
59,6m³/s
Max Strahler
5
Segments matched
26
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.