Ontologia

Commune · IND

Nahan

India

CwaTemperate, dry winter, hot summer(100 %)

Species observed

387

Observations

12 853

Area

563,2km²

Ecological tissue

Sample of 31 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 Nahan : 24 espèces reliées par 32 interactions GloBI sur 3 types (connectance 6.9%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
32
Connectance
0.069
Patrimoniales
0
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Species present

387 distinct species · 12 853 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

12 853 obs · 13 cellules
Obs. / cellule
≥ 11 332
407–11 331
182–406
141–181
< 141

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

Climate

Mean T°

20,9°C

Annual rain

1 752mm

Warmest m°

33,7°C

Coldest m°

5,3°C

Elevation: 778 m on average (min 330 m, max 1 700 m)

Bioclimatic detailsExpert
Annual mean temp.
20,9°C
Annual rain
1 752mm
Warmest month
33,7°C
Coldest month
5,3°C
Mean alt.
778m
Min
330m
Max
1 700m
Std. dev.
330m
Köppen-Geiger (dominant)
CwaTemperate, dry winter, hot summer(100 %)Temperate

CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)

Soil & lithology

pH H₂O

6,1

Org. C

31,4g/kg

Clay

25,4%

Sand

38,1%

Silt

36,5%

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

Dominant lithology: ssGLiMaggregated to Sirmaur

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,1
Org. C
48,6g/kg
Clay
23,9%
Sand
39,1%
Silt
37,0%
5–15 cm
pH H₂O
6,1
Org. C
30,3g/kg
Clay
24,6%
Sand
38,4%
Silt
37,0%
15–30 cm
pH H₂O
6,1
Org. C
15,4g/kg
Clay
27,6%
Sand
36,8%
Silt
35,6%

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

Land cover

Forest62.5%
Crops17.2%
Built-up0.7%
Bare soil0.3%
Other (grassland, water…)19.3%

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

Hydrology5 basins · 0 lakes · 5 rivers

Hydrology metrics for this exact territory

Stream length here

31,3km

Basins crossed

5

Max stream order

4

Max drainage

2 617km²

Discharge in basins

5,8m³/s

Mean precip.

1 283mm/an

Mean T°

21,9°C

Moisture idx

-0,14

Max snow

2%

Mean runoff

290mm/an

Mean elev. (basins)

720m

Watersheds crossing here

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

Human pressure

Pop. density

2hab/km²

Night light

0,7nW

Built-up

71,4%

Pesticides

1,9kg/km²

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