Ontologia

Commune · FRA

Saint-Michel-en-l'Herm

France

CfbTemperate, no dry season, warm summer(100 %)

Species observed

3 447

Observations

234 341

Area

58,4km²

Ecological tissue

Sample of 23 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-Michel-en-l'Herm : 14 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 50 interactions GloBI sur 2 types (connectance 18.1%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
24
Interactions affichées
50
Connectance
0.181
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

3 447 distinct species · 234 341 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

234 341 obs · 5 cellules
Obs. / cellule
≥ 138 256
138 256–138 255
56 978–138 255
20 768–56 977
< 20 768

Source : GBIF — observations agrégées par hexagones 0.027° × 0.027° (~22km), filtre précision coordonnée < 10 km. Fond carte : OpenFreeMap · © OpenStreetMap.

Climate

Mean T°

12,9°C

Annual rain

794mm

Warmest m°

23,2°C

Coldest m°

4,2°C

Elevation: 1 m on average (min -2 m, max 4 m)

Bioclimatic detailsExpert
Annual mean temp.
12,9°C
Annual rain
794mm
Warmest month
23,2°C
Coldest month
4,2°C
Mean alt.
1m
Min
-2m
Max
4m
Std. dev.
1m
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

7,2

Org. C

37,3g/kg

Clay

40,7%

Sand

14,2%

Silt

45,2%

Average over 0-30 cm. Per-depth details in expert panel.

Dominant lithology: ssGLiMaggregated to Vendée

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,2
Org. C
63,6g/kg
Clay
39,7%
Sand
13,9%
Silt
46,4%
5–15 cm
pH H₂O
7,3
Org. C
25,6g/kg
Clay
41,4%
Sand
12,9%
Silt
45,7%
15–30 cm
pH H₂O
7,3
Org. C
22,7g/kg
Clay
40,9%
Sand
15,7%
Silt
43,4%

SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)

Land cover

Forest0.7%
Crops72.9%
Built-up0.8%
Bare soil0.4%
Other (grassland, water…)25.2%

Copernicus Global Land Cover 100m (Buchhorn et al. 2020)

Hydrology2 basins · 0 lakes · 4 rivers

Hydrology metrics for this exact territory

Stream length here

9,5km

Basins crossed

2

Max stream order

2

Max drainage

1 999km²

Discharge in basins

0,6m³/s

Mean precip.

767mm/an

Mean T°

12,3°C

Moisture idx

-0,06

Max snow

4%

Mean runoff

522mm/an

Mean elev. (basins)

28m

Watersheds crossing here

Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10

Human pressure

Pop. density

0hab/km²

Night light

0,1nW

Built-up

82,9%

Pesticides

41,7kg/km²

GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)

Protected areas8

IUCN Not Reported · 3IUCN V · 2IUCN IV · 2IUCN III · 1🌊 Marine · 7

Marais poitevin

IUCN III

Wetland of International Importance (Ramsar Site) · 2023

690 km²

Marais poitevin

IUCN Not Reported

Special Protection Area (Birds Directive) · 2019

682 km²

Marais Poitevin

IUCN Not Reported

Special Areas of Conservation (Habitats Directive) · 2014

479 km²

Complete list

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.