HydroBASINS lev08 watershed · #7080043860

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 3 administrative regions : Clay, Duval, Saint Johns

Pfafstetter: 73256010

Sub-basin area

1 858km²

Upstream area

24 673,8km²

Discharge

233,76m³/s

Mean elev.

12m

Administrative coverage

Hydrographic chain

▼ Drains into

Outlet (drains to ocean / endorheic)

▲ Receives from 2 basins

Bassin de Saint Johns River2339 km²
Bassin de Black Creek1197 km²

3 dept-equivalent regions (GADM L2)

Duval
Florida · United States
1499.5 km²
80.8% of basin
Saint Johns
Florida · United States
199.1 km²
10.7% of basin
Clay
Florida · United States
157.4 km²
8.5% of basin

22 intersecting protected areas

Timucuan Ecological & Historic Preserve
IUCN V
Marine Protected Area
57.83 km² overlap
Nassau River - St. Johns River Marshes Aquatic Preserve
IUCN IV
Marine Protected Area
29.88 km² overlap
Timucuan Ecological and Historic
IUCN V
Preserve
29.34 km² overlap
Pablo Creek
IUCN V
Preserve
10.63 km² overlap
Pumpkin Hill Creek
IUCN V
Preserve State Park
9.56 km² overlap
Pumpkin Hill Creek Preserve State Park
IUCN IV
Marine Protected Area
9.56 km² overlap
Machaba Balu
IUCN V
Preserve
3.78 km² overlap
Rail Trail
IUCN V
Buffer
2.61 km² overlap
Gourd Island
IUCN V
Conservation Area
2.09 km² overlap

13 more protected areassorted by overlap area

Crosby
IUCN V
Sanctuary
1.65 km² overlap
Sawmill Slough
IUCN V
Preserve
1.55 km² overlap
Cedar Point
IUCN V
Preserve
1.45 km² overlap
Fort Caroline
IUCN III
National Memorial
0.56 km² overlap
Reed Island
IUCN V
Local Conservation Area
0.51 km² overlap
Ellis Property
IUCN V
Local Conservation Area
0.44 km² overlap
Cedar River
IUCN V
Sanctuary
0.21 km² overlap
Grandy
IUCN V
Preserve
0.16 km² overlap
Exchange Club Island
IUCN V
Club
0.14 km² overlap
Palm Island
IUCN V
Sanctuary
0.07 km² overlap
Bogey Creek Landing
IUCN V
Local Conservation Area
0.03 km² overlap
Bayorcor Property
IUCN V
Local Conservation Area
0.02 km² overlap
Unnamed Marsh Land
IUCN V
Local Conservation Area
0.02 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

6 282 distinct species · 1 668 751 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 39 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).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Saint Johns River : 26 espèces reliées par 80 interactions GloBI sur 3 types (connectance 10.8%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.108

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

20,5°C

Annual rain

1 268mm

Moisture idx (CMI)

-0,11

Runoff

334mm/an

PET

1 425mm

AET

1 073mm

Mean slope

0,5°

Water table

26cm

Forest

49%

Crops

Urban

53%

Protected

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)