HydroBASINS lev08 watershed · #7080514030
Bassin de St. Mary's 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 8 administrative regions : Adams, Allen, Auglaize, Mercer, Shelby +2
Sub-basin area
2 156,1km²
Upstream area
2 156,2km²
Discharge
22,49m³/s
Mean elev.
254m
Administrative coverage
Hydrographic chain
▼ Drains into
▲ Receives from 0 basins
Source / headwater (no upstream basin)
8 dept-equivalent regions (GADM L2)
- Adams610.1 km²28.3% of basin
- Mercer469.4 km²21.7% of basin
- 440.8 km²20.4% of basin
- 316.0 km²14.6% of basin
- 138.2 km²6.4% of basin
- 123.4 km²5.7% of basin
- Shelby59.8 km²2.8% of basin
- Allen1.2 km²0.1% of basin
12 intersecting protected areas
Reserve Program
3.24 km² overlap
Eagle Marsh
IUCN VNature Preserve
2.62 km² overlap
Reserve Program
0.78 km² overlap
Watershed Protection
0.55 km² overlap
Lindenwood
IUCN VNature Preserve
0.36 km² overlap
Wetlands Reserve Program (WRP)
IUCN Not AssignedReserve Program
0.29 km² overlap
Wetlands
0.28 km² overlap
Watershed Protection
0.25 km² overlap
Watershed Protection
0.21 km² overlap
3 more protected areassorted by overlap area
Reserve Program
0.19 km² overlap
Baltzell-Lenhart Woods
IUCN VNature Preserve
0.15 km² overlap
Reserve Program
0.14 km² overlap
Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.
Species present
2 191 distinct species · 274 356 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 St. Mary's River : 33 espèces reliées par 72 interactions GloBI sur 3 types (connectance 9.2%, filtre Serrano α=0.2). 7 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°
10,0°C
Annual rain
902mm
Moisture idx (CMI)
-0,13
Runoff
333mm/an
PET
1 035mm
AET
757mm
Mean slope
0,3°
Water table
17cm
Forest
1%
Crops
82%
Urban
6%
Protected
0%
HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)