Fleuve· 38 segments

St. Marys River

Crosses 8 administrative regions : Algoma, Auglaize, Chippewa, Lake Hurron, Lake Superior +1

fleuve

Total length

189km

Max discharge

4 539,7m³/s

Max Strahler

Segments matched

River geography8 admin regions · 0 communes

Parent watershed

hybas-70803925202257 km²

8 administrative regions crossed (GADM L2)

Lake Hurron
Michigan · United States
87.2 km
in this dpt
Auglaize
Ohio · United States
37.6 km
in this dpt
Lake Superior
Michigan · United States
13.4 km
in this dpt
Algoma
Ontario · Canada
5.2 km
in this dpt
Chippewa
Michigan · United States
5.0 km
in this dpt
Lake Superior
Ontario · Canada
2.2 km
in this dpt
Mercer
Ohio · United States
2.0 km
in this dpt
Lake Hurron
Ontario · Canada
1.0 km
in this dpt

19 intersecting protected areas

Sault Ste. Marie State Forest Area
IUCN V
State Forest
Detour Passage Great Lakes State Bottomland Preserve
IUCN IV
Marine Protected Area
Wetlands Reserve Program (WRP), Chippewa, MI
IUCN V
Reserve Program
St. Joseph’s Island Bird Sanctuary
IUCN II
Migratory Bird Sanctuary
University of Michigan Homestead
IUCN V
Nature Preserve
University of Michigan Property
IUCN V
Nature Preserve
Wetlands Reserve Program (WRP)
IUCN Not Assigned
Reserve Program
Bailey - Lagerstrom
IUCN V
Nature Preserve
NCC Fee Simple Property (140039)
IUCN IV
NGO/Land Trust/Agency - Fee Simple Property

10 more protected areassorted by area

Privately Protected Area (NCC 140039)
IUCN IV
Privately Protected Area
Little Traverse Conservancy
IUCN V
Local Conservation Area
Wetlands Reserve Program (WRP), Mercer, OH
IUCN V
Reserve Program
Hobbins Meyer
IUCN V
Nature Preserve
Sault Ste. Marie Water Lot
IUCN Not Applicable
Transport Canada Conservation Area
MNRTF Parcel 66
IUCN V
Conservation Area
Emergency Watershed Protection Program - Floodplain Easement (EWPP-FPE), Mercer, OH
IUCN V
Watershed Protection
06-17-0095
IUCN Not Assigned
Conservation Easement
Lower River Islands
IUCN V
Local Conservation Area
14-17-0068
IUCN Not Assigned
Conservation Easement

1 page = 1 named river (aggregation of 38 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

143 distinct species · 565 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 43 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 St. Marys River : 30 espèces reliées par 102 interactions GloBI sur 3 types (connectance 11.3%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

102

Connectance

0.113

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)