HydroBASINS lev08 watershed · #7080764520
Bassin de Saint Johns River
A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.
Crosses 5 administrative regions : Lake, Marion, Putnam, Seminole, Volusia
Sub-basin area
2 051,2km²
Upstream area
10 100,6km²
Discharge
98,5m³/s
Mean elev.
20m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 2 basins
- Bassin de Little Wekiva River917 km²
- Bassin de Saint Johns River401 km²
5 dept-equivalent regions (GADM L2)
- 660.6 km²32.2% of basin
- Marion612.7 km²29.9% of basin
- 533.2 km²26.0% of basin
- 241.9 km²11.8% of basin
- 0.1 km²0.0% of basin
15 intersecting protected areas
Ocala National
IUCN VGame Refuge
220.83 km² overlap
Lake Woodruff
IUCN IVNational Wildlife Refuge
87.34 km² overlap
Juniper Prairie
IUCN IbWilderness
57.86 km² overlap
Lower Wekiva River
IUCN VPreserve State Park
41.51 km² overlap
Nine Mile Point
IUCN Not AssignedCounty Managed Area
32.59 km² overlap
Alexander Springs
IUCN IbWilderness
31.92 km² overlap
Billies Bay
IUCN IbWilderness
12.40 km² overlap
Blue Spring
IUCN IIIState Park
10.76 km² overlap
Hontoon Island
IUCN IIIState Park
6.69 km² overlap
6 more protected areassorted by overlap area
Barberville
IUCN IVMitigation Bank
5.85 km² overlap
Little Lake George
IUCN IbWilderness
5.00 km² overlap
National Wildlife Refuge
3.92 km² overlap
Greenway
2.64 km² overlap
Lake Beresford
IUCN Not AssignedCounty Managed Area
1.43 km² overlap
Lungren Island
IUCN Not AssignedCounty Managed Area
0.01 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
5 115 distinct species · 364 080 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 40 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 Bassin de Saint Johns River : 29 espèces reliées par 59 interactions GloBI sur 4 types (connectance 7.2%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydroclimate (BasinATLAS lev08)
Mean T°
21,0°C
Annual rain
1 313mm
Moisture idx (CMI)
-0,12
Runoff
335mm/an
PET
1 495mm
AET
1 111mm
Mean slope
0,7°
Water table
47cm
Forest
69%
Crops
2%
Urban
4%
Protected
11%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)