HydroBASINS lev08 watershed · #7080434140

Bassin de Saint Lawrence 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 4 administrative regions across 2 countries : Frontenac, Jefferson, Lake Ontario

563% lakePfafstetter: 72552011

Sub-basin area

179,3km²

Upstream area

21 128,1km²

Discharge

256,43m³/s

Mean elev.

82m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de French Creek127 km²

▲ Receives from 2 basins

Bassin de Cataraqui River718 km²
Bassin de Little Cataraqui Creek138 km²

4 dept-equivalent regions (GADM L2)

Lake Ontario
Ontario · Canada
104.0 km²
57.9% of basin
Frontenac
Ontario · Canada
67.1 km²
37.3% of basin
Lake Ontario
New York · United States
4.7 km²
2.6% of basin
Jefferson
New York · United States
3.9 km²
2.2% of basin

14 intersecting protected areas

Abbey Dawn Forest
IUCN V
Conservation Area
0.77 km² overlap
Hietakangas Farm -Kenner/Smith Esmt (Marks Farm)
IUCN Not Assigned
Conservation Easement
0.24 km² overlap
Thousand Islands National Park Of Canada
IUCN II
National Park
0.23 km² overlap
Hietakangas Farm -Haxall Easement (Marks Farm)
IUCN Not Assigned
Easement
0.11 km² overlap
Pananen Farm
IUCN Not Assigned
Conservation Easement
0.11 km² overlap
Hietakangas Farm -Groat
IUCN Not Assigned
Easement
0.10 km² overlap
Mid River LLC (Rueckert)
IUCN Not Assigned
Conservation Easement
0.02 km² overlap
Mid-River Farm "Squash Court"
IUCN Not Assigned
Conservation Easement
0.01 km² overlap
Buck Bay - Stickney
IUCN Not Assigned
Conservation Easement
0.01 km² overlap

5 more protected areassorted by overlap area

Mid-River Farm "NoHawkwers"
IUCN Not Assigned
Conservation Easement
0.01 km² overlap
Mid-River Farm "Snake Island"
IUCN Not Assigned
Conservation Easement
0.00 km² overlap
Bostwick Island
IUCN Ia
NGO/Land Trust/Agency - Fee Simple Property
0.00 km² overlap
Blanket Islands
IUCN Not Assigned
Conservation Easement
0.00 km² overlap
Pig Island
IUCN Not Assigned
Conservation Easement
0.00 km² overlap

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

Species present

1 791 distinct species · 100 007 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 32 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 Lawrence River : 21 espèces reliées par 84 interactions GloBI sur 3 types (connectance 16.9%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.169

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°

6,9°C

Annual rain

917mm

Moisture idx (CMI)

0,10

Runoff

470mm/an

PET

827mm

AET

632mm

Mean slope

0,6°

Water table

61cm

Forest

26%

Crops

27%

Urban

Protected

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