Vallée du Narais, forêt de Bercé et ruisseau du Dinan
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2022
46 km²
Subdivision · FRA
Le Mans-Est-Campagne
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
4 497
Observations
174 683
Area
197,1km²
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
Indicateurs du tissu écologique
Tissu écologique de Le Mans-Est-Campagne : 13 espèces reliées par 218 interactions GloBI sur 6 types (connectance 13.7%, filtre Serrano α=0.2). 44 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
57
Interactions affichées
218
Connectance
0.137
Patrimoniales
0
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
4 497 distinct species · 174 683 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
11,4°C
Annual rain
738mm
Warmest m°
23,5°C
Coldest m°
1,7°C
Elevation: 87 m on average (min 54 m, max 152 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
11,4°C
Annual rain
738mm
Warmest month
23,5°C
Coldest month
1,7°C
Mean alt.
87m
Min
54m
Max
152m
Std. dev.
24m
Köppen-Geiger (dominant)
CfbTemperate, no dry season, warm summer(100 %)Temperate
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
6,0
Org. C
36,6g/kg
Clay
22,6%
Sand
36,7%
Silt
40,6%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: scGLiMaggregated to Sarthe
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
5,9
Org. C
65,0g/kg
Clay
21,8%
Sand
37,3%
Silt
40,9%
5–15 cm
pH H₂O
6,1
Org. C
27,8g/kg
Clay
22,6%
Sand
36,9%
Silt
40,4%
15–30 cm
pH H₂O
6,0
Org. C
17,0g/kg
Clay
23,4%
Sand
36,0%
Silt
40,5%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest31.8%
Crops34.0%
Built-up1.6%
Bare soil0.6%
Other (grassland, water…)32.0%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology4 basins · 0 lakes · 9 rivers
Hydrology metrics for this exact territory
Stream length here
46,1km
Basins crossed
4
Max stream order
4
Max drainage
8 211km²
Discharge in basins
4,1m³/s
Mean precip.
688mm/an
Mean T°
10,6°C
Moisture idx
-0,17
Max snow
6%
Mean runoff
255mm/an
Mean elev. (basins)
134m
Watersheds crossing here
Rivers / streams (9, ord ≥ 4)
- L'Huisneord 4len here13.12 km9%total144 km
- Le Naraisord 4len here12.10 km53%total23 km
- La Morte Parenceord 2len here8.49 km71%total12 km
- La Vive Parenceord 3len here4.56 km55%total8 km
- Roules Crotteord 2len here3.89 km27%total14 km
- La Huneord 2len here2.05 km100%total2 km
- L'Archeord 1len here0.85 km15%total6 km
- Le Vivierord 1len here0.84 km100%total1 km
- La Souriceord 2len here0.16 km2%total8 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
1,0nW
Built-up
164,0%
Pesticides
45,6kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas2
IUCN Not Reported · 1IUCN IV · 1
Bas-Marais Tourbeux De La Basse-Goulandière
IUCN IVRegional Nature Reserve · 2011
0 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN
Sub-administrations5
France-specific data (Phase 2)
ZNIEFF, Natura 2000, INPN protected spaces, BNV-D pesticides, Naïades water quality, SAFRAN fine climate, BRGM lithology — Layer FR to load in Phase 2.