Vallée du Narais, forêt de Bercé et ruisseau du Dinan
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2022
46 km²
Commune · FRA
Surfonds
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
945
Observations
7 657
Area
4,7km²
Ecological tissue
Sample of 29 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 Surfonds : 24 espèces reliées par 71 interactions GloBI sur 4 types (connectance 17.5%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
29
Interactions affichées
71
Connectance
0.175
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
945 distinct species · 7 657 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
11,3°C
Annual rain
720mm
Warmest m°
23,4°C
Coldest m°
1,5°C
Elevation: 111 m on average (min 99 m, max 130 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
11,3°C
Annual rain
720mm
Warmest month
23,4°C
Coldest month
1,5°C
Mean alt.
111m
Min
99m
Max
130m
Std. dev.
9m
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
5,9
Org. C
36,1g/kg
Clay
21,9%
Sand
36,0%
Silt
42,1%
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
5,7
Org. C
63,1g/kg
Clay
21,2%
Sand
36,5%
Silt
42,3%
5–15 cm
pH H₂O
5,9
Org. C
26,8g/kg
Clay
21,5%
Sand
36,6%
Silt
42,0%
15–30 cm
pH H₂O
5,9
Org. C
18,3g/kg
Clay
23,0%
Sand
34,9%
Silt
42,1%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest30.0%
Crops46.3%
Built-up0.7%
Bare soil0.6%
Other (grassland, water…)22.4%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology1 basins · 0 lakes · 1 rivers
Hydrology metrics for this exact territory
Stream length here
0,3km
Basins crossed
1
Max stream order
1
Max drainage
2 420km²
Discharge in basins
0,0m³/s
Mean precip.
684mm/an
Mean T°
10,4°C
Moisture idx
-0,17
Max snow
6%
Mean runoff
264mm/an
Mean elev. (basins)
153m
Watersheds crossing here
Rivers / streams (1, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
0,1nW
Built-up
66,9%
Pesticides
45,4kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas1
IUCN Not Reported · 1
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN
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.