Rivière· 10 segments
Mad River
Crosses 2 administrative regions : Carroll, Grafton
Total length
578km
Max discharge
26,5m³/s
Max Strahler
4
Segments matched
10
River geography2 admin regions · 0 communes
2 administrative regions crossed (GADM L2)
- GraftonNew Hampshire · United States22.4 kmin this dpt
- CarrollNew Hampshire · United States0.0 kmin this dpt
1 intersecting protected areas
Sandwich Range
IUCN IbWilderness
1 page = 1 named river (aggregation of 10 HydroRIVERS v10 segments). Spatial join cached after first hit.
Species present
527 distinct species · 4 807 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 47 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 Mad River : 37 espèces reliées par 88 interactions GloBI sur 4 types (connectance 8.1%, filtre Serrano α=0.2). 10 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
578km
Max discharge
26,5m³/s
Max Strahler
4
Segments matched
10
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.