Marais et tourbières des vallées de la Somme et de l’Avre
IUCN IVWetland of International Importance (Ramsar Site) · 2017
131 km²
Commune · FRA
Bourdon
France
CfbTemperate, no dry season, warm summer(100 %)
Species observed
1 881
Observations
17 504
Area
7,1km²
Ecological tissue
Sample of 44 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 Bourdon : 33 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 141 interactions GloBI sur 6 types (connectance 12.5%, filtre Serrano α=0.2). 15 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
48
Interactions affichées
141
Connectance
0.125
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
1 881 distinct species · 17 504 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
10,7°C
Annual rain
745mm
Warmest m°
22,0°C
Coldest m°
1,3°C
Elevation: 39 m on average (min 18 m, max 69 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
10,7°C
Annual rain
745mm
Warmest month
22,0°C
Coldest month
1,3°C
Mean alt.
39m
Min
18m
Max
69m
Std. dev.
20m
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
7,0
Org. C
25,6g/kg
Clay
23,0%
Sand
13,2%
Silt
63,8%
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
6,8
Org. C
40,7g/kg
Clay
22,1%
Sand
13,0%
Silt
64,9%
5–15 cm
pH H₂O
7,1
Org. C
18,8g/kg
Clay
22,9%
Sand
12,5%
Silt
64,6%
15–30 cm
pH H₂O
7,0
Org. C
17,1g/kg
Clay
24,0%
Sand
14,1%
Silt
61,9%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest12.7%
Crops64.5%
Built-up0.6%
Bare soil0.7%
Other (grassland, water…)21.5%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology2 basins · 1 lakes · 2 rivers
Hydrology metrics for this exact territory
Stream length here
4,6km
Lake surface here
0,19km²
Basins crossed
2
Max stream order
5
Max drainage
6 195km²
Discharge in basins
1,1m³/s
Mean precip.
658mm/an
Mean T°
10,1°C
Moisture idx
-0,12
Max snow
8%
Mean runoff
487mm/an
Mean elev. (basins)
88m
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
0,3nW
Built-up
58,9%
Pesticides
47,5kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas6
IUCN IV · 5IUCN Not Reported · 1
Basse vallée de la Somme de Pont-Rémy à Breilly
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2010
14 km²
le marais du chateau
IUCN IVLand acquired by a regional conservatory of natural areas · 2002
0 km²
le larry de bourdon
IUCN IVLand acquired by a regional conservatory of natural areas · 2013
0 km²
le marais departemental d yzeux
IUCN IVLand acquired by a regional conservatory of natural areas · 2013
0 km²
site geologique
IUCN IVLand acquired by a regional conservatory of natural areas · 2022
0 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.