Ontologia

Commune · FRA

Saint-Mars-du-Désert

France

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

Species observed

2 727

Observations

33 878

Area

30,6km²

Ecological tissue

Sample of 37 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-Mars-du-Désert : 26 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 131 interactions GloBI sur 6 types (connectance 18.6%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
131
Connectance
0.186
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

2 727 distinct species · 33 878 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

33 878 obs · 4 cellules
Obs. / cellule
≥ 12 222
12 222–12 221
8 929–12 221
8 929–8 928
< 8 929

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

Climate

Mean T°

12,0°C

Annual rain

813mm

Warmest m°

23,5°C

Coldest m°

2,6°C

Elevation: 33 m on average (min 3 m, max 76 m)

Bioclimatic detailsExpert
Annual mean temp.
12,0°C
Annual rain
813mm
Warmest month
23,5°C
Coldest month
2,6°C
Mean alt.
33m
Min
3m
Max
76m
Std. dev.
23m
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

41,6g/kg

Clay

17,6%

Sand

35,1%

Silt

47,2%

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

Dominant lithology: ssGLiMaggregated to Loire-Atlantique

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,9
Org. C
65,2g/kg
Clay
16,8%
Sand
35,9%
Silt
47,2%
5–15 cm
pH H₂O
5,9
Org. C
30,3g/kg
Clay
17,9%
Sand
34,9%
Silt
47,2%
15–30 cm
pH H₂O
5,9
Org. C
29,2g/kg
Clay
18,1%
Sand
34,6%
Silt
47,3%

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

Land cover

Forest18.4%
Crops42.5%
Built-up2.3%
Bare soil0.8%
Other (grassland, water…)36.1%

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

Hydrology2 basins · 2 lakes · 2 rivers

Hydrology metrics for this exact territory

Stream length here

3,8km

Lake surface here

1,48km²

Basins crossed

2

Max stream order

1

Max drainage

111 742km²

Discharge in basins

1,0m³/s

Mean precip.

750mm/an

Mean T°

11,4°C

Moisture idx

-0,09

Max snow

5%

Mean runoff

435mm/an

Mean elev. (basins)

45m

Watersheds crossing here

Lakes (2, top by area)

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

Human pressure

Pop. density

1hab/km²

Night light

0,2nW

Built-up

227,9%

Pesticides

44,1kg/km²

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

Protected areas2

IUCN Not Reported · 2

Marais de l'Erdre

IUCN Not Reported

Special Protection Area (Birds Directive) · 2019

28 km²

Marais de l'Erdre

IUCN Not Reported

Special Areas of Conservation (Habitats Directive) · 2014

26 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.