Ontologia

Commune · FRA

Varennes-sous-Dun

France

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

Species observed

1 372

Observations

23 891

Area

17,6km²

Ecological tissue

Sample of 29 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 Varennes-sous-Dun : 22 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 65 interactions GloBI sur 5 types (connectance 16.0%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
29
Interactions affichées
65
Connectance
0.160
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

1 372 distinct species · 23 891 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

23 891 obs · 3 cellules
Obs. / cellule
≥ 14 994
14 994–14 993
14 994–14 993
4 843–14 993
< 4 843

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

Climate

Mean T°

10,7°C

Annual rain

1 041mm

Warmest m°

24,0°C

Coldest m°

-0,6°C

Elevation: 444 m on average (min 382 m, max 580 m)

Bioclimatic detailsExpert
Annual mean temp.
10,7°C
Annual rain
1 041mm
Warmest month
24,0°C
Coldest month
-0,6°C
Mean alt.
444m
Min
382m
Max
580m
Std. dev.
60m
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

5,8

Org. C

34,9g/kg

Clay

21,8%

Sand

42,3%

Silt

35,9%

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

Dominant lithology: scGLiMaggregated to Saône-et-Loire

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,8
Org. C
52,6g/kg
Clay
20,1%
Sand
43,2%
Silt
36,8%
5–15 cm
pH H₂O
5,7
Org. C
32,9g/kg
Clay
21,6%
Sand
42,2%
Silt
36,3%
15–30 cm
pH H₂O
5,8
Org. C
19,2g/kg
Clay
23,7%
Sand
41,6%
Silt
34,7%

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

Land cover

Forest31.4%
Crops35.7%
Built-up0.8%
Bare soil0.4%
Other (grassland, water…)31.7%

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

Hydrology1 basins · 0 lakes · 1 rivers

Hydrology metrics for this exact territory

Stream length here

4,5km

Basins crossed

1

Max stream order

2

Max drainage

510km²

Discharge in basins

0,2m³/s

Mean precip.

801mm/an

Mean T°

10,0°C

Moisture idx

-0,04

Max snow

10%

Mean runoff

325mm/an

Mean elev. (basins)

459m

Watersheds crossing here

Rivers / streams (1, ord ≥ 4)

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

Human pressure

Pop. density

0hab/km²

Night light

0,5nW

Built-up

80,4%

Pesticides

11,0kg/km²

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

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.