Commune · CHN
Luan
China
Species observed
52
Observations
77
Area
1 001,5km²
Ecological tissue
Sample of 27 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 Luan : 23 espèces reliées par 26 interactions GloBI sur 3 types (connectance 7.4%, filtre Serrano α=0.2). 4 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
52 distinct species · 77 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
11,5°C
Annual rain
652mm
Warmest m°
29,9°C
Coldest m°
-10,4°C
Elevation: 65 m on average (min 15 m, max 359 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
7,5
Org. C
10,1g/kg
Clay
19,4%
Sand
47,6%
Silt
33,0%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: scGLiMaggregated to Tangshan
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 · 2 lakes · 14 rivers
Hydrology metrics for this exact territory
Stream length here
176,2km
Lake surface here
0,15km²
Basins crossed
8
Max stream order
6
Max drainage
45 725km²
Discharge in basins
28,1m³/s
Mean precip.
633mm/an
Mean T°
10,9°C
Moisture idx
-0,39
Max snow
3%
Mean runoff
67mm/an
Mean elev. (basins)
45m
Watersheds crossing here
- Bassin de 滦河sub-area1 020,2 km²overlap242.50 km²24%
- Bassin de 老陡河sub-area1 588,2 km²overlap227.12 km²23%
- Bassin de 小青河sub-area750,6 km²overlap206.63 km²21%
- Bassin de 沙河sub-area1 236,6 km²overlap137.61 km²14%
- Bassin de 双龙河sub-area1 889,9 km²overlap120.90 km²12%
- Bassin de 滦河sub-area2 068,2 km²overlap44.90 km²4%
- Bassin de 还乡河sub-area1 392,7 km²overlap21.48 km²2%
- Bassin de 青龙河sub-area310,4 km²overlap0.34 km²0%
Lakes (2, top by area)
Rivers / streams (14, ord ≥ 4)
- 滦河ord 6len here42.49 km4%total1205 km
- 沙河ord 3len here29.11 km23%total126 km
- 龙湾河ord 2len here27.06 km100%total27 km
- 小青龙河ord 2len here16.39 km31%total54 km
- 岳家河ord 1len here14.87 km86%total17 km
- 小戟门河ord 2len here12.82 km24%total53 km
- 管河ord 2len here10.92 km63%total17 km
- 狗尿河ord 1len here6.44 km100%total6 km
- 别故河ord 2len here6.17 km100%total6 km
- 溯河ord 2len here3.25 km40%total8 km
- 还乡河ord 4len here2.66 km1%total189 km
- 别故河故道ord 1len here1.80 km100%total2 km
2 more river segmentssorted by Strahler order + length
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
4hab/km²
Night light
2,6nW
Built-up
450,7%
Pesticides
74,9kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)