Rivière· 148 segments

Saint Johns River

Crosses 12 administrative regions : Brevard, Clay, Duval, Indian River, Lake +7

rivière

Total length

534km

Max discharge

233,9m³/s

Max Strahler

Segments matched

148

River geography12 admin regions · 0 communes

Parent watershed

hybas-70807645202051 km²

12 administrative regions crossed (GADM L2)

Brevard
Florida · United States
126.4 km
in this dpt
Volusia
Florida · United States
102.2 km
in this dpt
Putnam
Florida · United States
94.8 km
in this dpt
Clay
Florida · United States
67.3 km
in this dpt
Lake
Florida · United States
62.7 km
in this dpt
Duval
Florida · United States
54.0 km
in this dpt
Orange
Florida · United States
41.0 km
in this dpt
Saint Johns
Florida · United States
40.1 km
in this dpt
Seminole
Florida · United States
21.7 km
in this dpt
Indian River
Florida · United States
19.5 km
in this dpt
Marion
Florida · United States
6.2 km
in this dpt
Osceola
Florida · United States
5.3 km
in this dpt

29 intersecting protected areas

Nassau River - St. Johns River Marshes Aquatic Preserve
IUCN IV
Marine Protected Area
Timucuan Ecological & Historic Preserve
IUCN V
Marine Protected Area
Lake Woodruff
IUCN IV
National Wildlife Refuge
Lower Wekiva River
IUCN V
Preserve State Park
Timucuan Ecological and Historic
IUCN V
Preserve
Juniper Prairie
IUCN Ib
Wilderness
Wetlands Reserve Program (WRP), Brevard, FL
IUCN V
Reserve Program
Alexander Springs
IUCN Ib
Wilderness
St. Johns
IUCN IV
National Wildlife Refuge

20 more protected areassorted by area

St. Johns River Blueway-Meldrim
IUCN Not Assigned
Conservation Easement
Pumpkin Hill Creek Preserve State Park
IUCN IV
Marine Protected Area
Pumpkin Hill Creek
IUCN V
Preserve State Park
Wetlands Reserve Program (WRP), Seminole, FL
IUCN V
Reserve Program
Little Lake George
IUCN Ib
Wilderness
Blue Spring
IUCN III
State Park
Machaba Balu
IUCN V
Preserve
Black Bear
IUCN V
Wilderness Area
Hontoon Island
IUCN III
State Park
Deering Preserve At Deep Creek
IUCN Not Assigned
Preserve
Lake Woodruff National Wildlife Refuge.Wilderness Area
IUCN Ib
National Wildlife Refuge
Wekiva-Ocala Greenway Florida Forever Bot Project - Wekiva-Ocala Connector East Macrosite
IUCN V
Greenway
Lake Harney
IUCN V
Wilderness Area
Lake Beresford
IUCN Not Assigned
County Managed Area
Hickory Bluff
IUCN Not Assigned
County Managed Area
Fort Caroline
IUCN III
National Memorial
Green Cove Springs
IUCN V
Nature Preserve
Exchange Club Island
IUCN V
Club
Bogey Creek Landing
IUCN V
Local Conservation Area
Lungren Island
IUCN Not Assigned
County Managed Area

1 page = 1 named river (aggregation of 148 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

347 distinct species · 1 061 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 46 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 Saint Johns River : 35 espèces reliées par 78 interactions GloBI sur 4 types (connectance 7.5%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.075

Patrimoniales

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

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

Hydrology (HydroRIVERS v10)