Vallée de la Rance - Côte d\'Emeraude
IUCN VRegional Nature Park · 2024
893 km²
Commune · FRA
Saint-Hélen
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
868
Observations
3 711
Area
16,9km²
Ecological tissue
Sample of 46 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 Saint-Hélen : 40 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 88 interactions GloBI sur 6 types (connectance 8.5%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
46
Interactions affichées
88
Connectance
0.085
Patrimoniales
1
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
868 distinct species · 3 711 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
11,5°C
Annual rain
756mm
Warmest m°
21,9°C
Coldest m°
2,9°C
Elevation: 54 m on average (min 26 m, max 83 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
11,5°C
Annual rain
756mm
Warmest month
21,9°C
Coldest month
2,9°C
Mean alt.
54m
Min
26m
Max
83m
Std. dev.
12m
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
6,2
Org. C
33,7g/kg
Clay
21,9%
Sand
21,3%
Silt
56,8%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: paGLiMaggregated to Côtes-d'Armor
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,1
Org. C
54,9g/kg
Clay
20,4%
Sand
21,6%
Silt
57,9%
5–15 cm
pH H₂O
6,2
Org. C
26,9g/kg
Clay
22,3%
Sand
20,9%
Silt
56,9%
15–30 cm
pH H₂O
6,2
Org. C
19,2g/kg
Clay
22,8%
Sand
21,3%
Silt
55,8%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest33.3%
Crops39.6%
Built-up1.0%
Bare soil0.4%
Other (grassland, water…)25.6%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology1 basins · 1 lakes · 2 rivers
Hydrology metrics for this exact territory
Stream length here
1,5km
Lake surface here
0,01km²
Basins crossed
1
Max stream order
4
Max drainage
1 026km²
Discharge in basins
0,3m³/s
Mean precip.
749mm/an
Mean T°
11,0°C
Moisture idx
0,01
Max snow
7%
Mean runoff
519mm/an
Mean elev. (basins)
82m
Watersheds crossing here
Lakes (1, top by area)
Rivers / streams (2, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,0nW
Built-up
103,2%
Pesticides
46,1kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas2
IUCN V · 1IUCN Not Reported · 1🌊 Marine · 2
Estuaire de la Rance
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2014
28 km²
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.