Commune · IND
Siwan
India
Species observed
149
Observations
344
Area
2 225,5km²
Ecological tissue
Sample of 34 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).
Indicateurs du tissu écologique
Tissu écologique de Siwan : 25 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 50 interactions GloBI sur 3 types (connectance 8.9%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
149 distinct species · 344 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
25,5°C
Annual rain
1 117mm
Warmest m°
37,5°C
Coldest m°
9,9°C
Elevation: 62 m on average (min 54 m, max 70 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
7,1
Org. C
11,9g/kg
Clay
28,0%
Sand
31,3%
Silt
40,7%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: suGLiMaggregated to Siwan
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology8 basins · 33 lakes · 2 rivers
Hydrology metrics for this exact territory
Stream length here
36,0km
Lake surface here
12,84km²
Basins crossed
8
Max stream order
7
Max drainage
726 192km²
Discharge in basins
3 700,5m³/s
Mean precip.
1 045mm/an
Mean T°
25,5°C
Moisture idx
-0,35
Max snow
1%
Mean runoff
411mm/an
Mean elev. (basins)
65m
Watersheds crossing here
- Bassin de Gandak Naharsub-area1 830,6 km²overlap990.41 km²45%
- Bassin de Gandak Naharsub-area1 917,4 km²overlap342.72 km²15%
- Basin #99830sub-area603,4 km²overlap256.25 km²12%
- Bassin de Gandak Naharsub-area580,3 km²overlap232.25 km²10%
- Bassin de Ghagharasub-area1 009,8 km²overlap212.17 km²10%
- Bassin de Ghagharasub-area291,5 km²overlap137.94 km²6%
- Bassin de Ghagharasub-area349,3 km²overlap53.38 km²2%
- Bassin de Ghagharasub-area327,4 km²overlap0.35 km²0%
Lakes (33, top by area)
- Lake #76908area1,1 km²avg depth1.0 m
- Lac 1383785area0,9 km²avg depth2.0 m
- Lac 1383693area0,9 km²avg depth1.8 m
- Lac 1383559area0,9 km²avg depth1.4 m
- Lac 1383662area0,7 km²avg depth2.1 m
- Lac 1383769area0,6 km²avg depth1.7 m
- Lac 1383756area0,6 km²avg depth1.6 m
- Lac 1383629area0,6 km²avg depth1.7 m
- Lac 1383708area0,6 km²avg depth1.7 m
24 more lakes
- Lac 1383720area0,5 km²avg depth1.4 m
- Lac 1383621area0,5 km²avg depth1.4 m
- Lac 1383839area0,5 km²avg depth1.4 m
- Lac 1383934area0,4 km²avg depth1.9 m
- Lac 1383596area0,4 km²avg depth0.9 m
- Lac 1383821area0,4 km²avg depth1.3 m
- Lac 1383603area0,3 km²avg depth1.4 m
- Lac 1383636area0,3 km²avg depth1.3 m
- Lac 1383745area0,3 km²avg depth1.4 m
- Lac 1383715area0,3 km²avg depth1.8 m
- Lac 1383656area0,2 km²avg depth1.0 m
- Lac 1383605area0,2 km²avg depth1.0 m
- Lac 1383664area0,2 km²avg depth1.5 m
- Lac 1383544area0,2 km²avg depth1.5 m
- Lac 1383893area0,2 km²avg depth1.4 m
- Lac 1384012area0,2 km²avg depth1.5 m
- Lac 1383646area0,2 km²avg depth0.8 m
- Lac 1383569area0,2 km²avg depth1.1 m
- Lac 1383613area0,1 km²avg depth1.1 m
- Lac 1383731area0,1 km²avg depth0.5 m
- Lac 1383698area0,1 km²avg depth0.9 m
- Lac 1383667area0,1 km²avg depth1.3 m
- Lac 1383633area0,1 km²avg depth1.3 m
- Lac 1383799area0,1 km²avg depth1.3 m
Rivers / streams (2, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
13hab/km²
Night light
1,5nW
Built-up
243,7%
Pesticides
2,0kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)