Ontologia

Commune · FRA

Varennes-sur-Loire

France

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

Species observed

2 513

Observations

34 525

Area

23,9km²

Ecological tissue

Sample of 36 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-sur-Loire : 26 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 111 interactions GloBI sur 5 types (connectance 15.0%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
39
Interactions affichées
111
Connectance
0.150
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

2 513 distinct species · 34 525 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

34 525 obs · 4 cellules
Obs. / cellule
≥ 15 614
15 614–15 613
6 581–15 613
6 581–6 580
< 6 581

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

Climate

Mean T°

12,3°C

Annual rain

641mm

Warmest m°

24,6°C

Coldest m°

2,3°C

Elevation: 28 m on average (min 25 m, max 46 m)

Bioclimatic detailsExpert
Annual mean temp.
12,3°C
Annual rain
641mm
Warmest month
24,6°C
Coldest month
2,3°C
Mean alt.
28m
Min
25m
Max
46m
Std. dev.
2m
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

6,6

Org. C

28,1g/kg

Clay

16,5%

Sand

52,1%

Silt

31,4%

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

Dominant lithology: ssGLiMaggregated to Maine-et-Loire

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,4
Org. C
43,4g/kg
Clay
16,4%
Sand
52,3%
Silt
31,4%
5–15 cm
pH H₂O
6,6
Org. C
23,1g/kg
Clay
16,2%
Sand
53,1%
Silt
30,8%
15–30 cm
pH H₂O
6,6
Org. C
17,8g/kg
Clay
16,9%
Sand
51,0%
Silt
32,1%

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

Land cover

Forest11.2%
Crops48.9%
Built-up1.2%
Bare soil3.0%
Other (grassland, water…)35.7%

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

Hydrology2 basins · 0 lakes · 2 rivers

Hydrology metrics for this exact territory

Stream length here

4,9km

Basins crossed

2

Max stream order

7

Max drainage

81 075km²

Discharge in basins

127,2m³/s

Mean precip.

679mm/an

Mean T°

11,5°C

Moisture idx

-0,23

Max snow

6%

Mean runoff

198mm/an

Mean elev. (basins)

52m

Watersheds crossing here

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

Human pressure

Pop. density

0hab/km²

Built-up

120,7%

Pesticides

44,6kg/km²

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

Protected areas6

IUCN Not Reported · 4IUCN V · 1IUCN IV · 1

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.