Commune · SDN
Geissan
Sudan
Species observed
44
Observations
118
Area
3 039,2km²
Ecological tissue
Sample of 9 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 Geissan : 7 espèces reliées par 7 interactions GloBI sur 3 types (connectance 19.4%, filtre Serrano α=0.2). 2 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
44 distinct species · 118 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
27,5°C
Annual rain
733mm
Warmest m°
38,0°C
Coldest m°
19,7°C
Elevation: 645 m on average (min 482 m, max 1 145 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
6,6
Org. C
12,3g/kg
Clay
37,2%
Sand
32,9%
Silt
29,9%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: mtGLiMaggregated to Geissan
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)
Hydrology20 basins · 2 lakes · 3 rivers
Hydrology metrics for this exact territory
Stream length here
45,8km
Lake surface here
2,37km²
Basins crossed
20
Max stream order
7
Max drainage
182 585km²
Discharge in basins
5 501,1m³/s
Mean precip.
983mm/an
Mean T°
27,0°C
Moisture idx
-0,52
Mean runoff
99mm/an
Mean elev. (basins)
667m
Watersheds crossing here
- Basin #74190sub-area1 131,7 km²overlap709.86 km²23%
- Bassin de النيل الأزرقsub-area1 543 km²overlap365.18 km²12%
- Bassin de النيل الأزرقsub-area376 km²overlap349.26 km²11%
- Basin #67520sub-area352,9 km²overlap346.34 km²11%
- Basin #68610sub-area280,8 km²overlap279.67 km²9%
- Basin #68840sub-area183,7 km²overlap182.93 km²6%
- Basin #62820sub-area155,1 km²overlap154.49 km²5%
- Basin #74180sub-area709,4 km²overlap149.34 km²5%
- Basin #66430sub-area313,3 km²overlap126.26 km²4%
11 more basinssorted by overlap
- Bassin de النيل الأزرقsub-area322,9 km²overlap124.54 km²4%
- Basin #72190sub-area322,3 km²overlap100.90 km²3%
- Bassin de النيل الأزرقsub-area57,5 km²overlap56.86 km²2%
- Basin #55890sub-area310,4 km²overlap36.81 km²1%
- Basin #67530sub-area24,8 km²overlap24.67 km²1%
- Bassin de Mole Wenzsub-area1 122,9 km²overlap24.41 km²1%
- Bassin de ዓባይ ወንዝsub-area822,3 km²overlap5.06 km²0%
- Basin #63450sub-area221,1 km²overlap1.74 km²0%
- Basin #76130sub-area303,6 km²overlap0.50 km²0%
- Bassin de النيل الأزرقsub-area696,2 km²overlap0.21 km²0%
- Basin #65930sub-area331,1 km²overlap0.17 km²0%
Lakes (2, top by area)
Rivers / streams (3, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,0nW
Built-up
3,3%
Pesticides
1,2kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)