Baie de Somme Picardie maritime
IUCN VRegional Nature Park · 2020
1 361 km²
Commune · FRA
Villers-sur-Authie
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
1 786
Observations
44 260
Area
12,4km²
Ecological tissue
Sample of 45 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 Villers-sur-Authie : 32 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 95 interactions GloBI sur 6 types (connectance 9.6%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
45
Interactions affichées
95
Connectance
0.096
Patrimoniales
2
Plus dense que (national)0 %(top 100%)
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
1 786 distinct species · 44 260 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
11,0°C
Annual rain
874mm
Warmest m°
21,0°C
Coldest m°
2,2°C
Elevation: 11 m on average (min 4 m, max 29 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
11,0°C
Annual rain
874mm
Warmest month
21,0°C
Coldest month
2,2°C
Mean alt.
11m
Min
4m
Max
29m
Std. dev.
8m
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
6,8
Org. C
40,6g/kg
Clay
24,4%
Sand
34,0%
Silt
41,6%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: smGLiMaggregated to Somme
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,7
Org. C
63,4g/kg
Clay
24,5%
Sand
34,3%
Silt
41,4%
5–15 cm
pH H₂O
6,9
Org. C
35,8g/kg
Clay
24,8%
Sand
33,9%
Silt
41,3%
15–30 cm
pH H₂O
6,9
Org. C
22,8g/kg
Clay
23,8%
Sand
33,9%
Silt
42,2%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest14.2%
Crops57.5%
Built-up0.5%
Bare soil0.7%
Other (grassland, water…)27.1%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology1 basins · 0 lakes · 2 rivers
Hydrology metrics for this exact territory
Stream length here
7,3km
Basins crossed
1
Max stream order
3
Max drainage
1 103km²
Discharge in basins
0,2m³/s
Mean precip.
662mm/an
Mean T°
10,1°C
Moisture idx
-0,06
Max snow
8%
Mean runoff
542mm/an
Mean elev. (basins)
92m
Watersheds crossing here
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
0,2nW
Built-up
52,1%
Pesticides
45,4kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas8
IUCN Not Reported · 5IUCN IV · 2IUCN V · 1🌊 Marine · 2
Baie de Somme
IUCN Not ReportedWetland of International Importance (Ramsar Site) · 1998
190 km²
Marais arrière-littoraux picards
IUCN Not ReportedSpecial Protection Area (Birds Directive) · 2015
18 km²
Marais arrière-littoraux picards
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2017
17 km²
Vallée de l'Authie
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2015
7 km²
Prairies et marais tourbeux de la basse vallée de l'Authie
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2015
3 km²
Complete list8 protected areas
- Baie de Somme Picardie maritimeRegional Nature ParkIUCN V20201 361 km²
- Baie de SommeWetland of International Importance (Ramsar Site)IUCN Not Reported1998190 km²
- Marais arrière-littoraux picardsSpecial Protection Area (Birds Directive)IUCN Not Reported201518 km²
- Marais arrière-littoraux picardsSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported201717 km²
- Vallée de l'AuthieSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20157 km²
- Prairies et marais tourbeux de la basse vallée de l'AuthieSpecial Areas of Conservation (Habitats Directive)IUCN Not Reported20153 km²
- le marais du pendeLand acquired by a regional conservatory of natural areasIUCN IV19970 km²
- Basse vallee de l\'authieLand acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)IUCN IV20090 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.