Commune · CHN
Helong
China
Species observed
758
Observations
2 238
Area
5 047,1km²
Ecological tissue
Sample of 8 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 Helong : 7 espèces reliées par 6 interactions GloBI sur 2 types (connectance 21.4%, filtre Serrano α=0.2). 1 bulle taxonomique (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Species present
758 distinct species · 2 238 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
3,6°C
Annual rain
822mm
Warmest m°
23,2°C
Coldest m°
-21,8°C
Elevation: 840 m on average (min 264 m, max 1 472 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
6,0
Org. C
57,4g/kg
Clay
21,3%
Sand
36,1%
Silt
42,6%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: paGLiMaggregated to Yanbian Korean
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)
Hydrology18 basins · 2 lakes · 13 rivers
Hydrology metrics for this exact territory
Stream length here
505,1km
Lake surface here
2,57km²
Basins crossed
18
Max stream order
5
Max drainage
9 022km²
Discharge in basins
208,9m³/s
Mean precip.
676mm/an
Mean T°
2,1°C
Moisture idx
-0,12
Max snow
37%
Mean runoff
257mm/an
Mean elev. (basins)
870m
Watersheds crossing here
- Bassin de 두만강 图们江sub-area2 415,2 km²overlap1448.21 km²29%
- Bassin de 长仁河sub-area881,9 km²overlap836.51 km²17%
- Bassin de 海兰河sub-area614,3 km²overlap615.08 km²12%
- Bassin de 海兰河sub-area586,4 km²overlap587.33 km²12%
- Bassin de 古洞河sub-area939,9 km²overlap528.09 km²10%
- Bassin de 柳洞河sub-area300,3 km²overlap298.09 km²6%
- Bassin de 두만강 图们江sub-area1 087,5 km²overlap295.84 km²6%
- Bassin de 두만강 图们江sub-area265,6 km²overlap187.54 km²4%
- Bassin de 두만강 图们江sub-area216,1 km²overlap158.71 km²3%
9 more basinssorted by overlap
- Bassin de 두만강 图们江sub-area146 km²overlap73.38 km²1%
- Bassin de 五道白河sub-area892,5 km²overlap8.85 km²0%
- Bassin de 布尔哈通河sub-area3 501,2 km²overlap4.02 km²0%
- Bassin de 五道白河sub-area172,5 km²overlap3.15 km²0%
- Bassin de 六道河 륙도하sub-area426 km²overlap1.03 km²0%
- Bassin de 연면수sub-area1 658 km²overlap0.91 km²0%
- Bassin de 古洞河sub-area314,5 km²overlap0.25 km²0%
- Bassin de 东盛1号干渠sub-area422 km²overlap0.07 km²0%
- Bassin de 五道白河sub-area346,7 km²overlap0.06 km²0%
Lakes (2, top by area)
Rivers / streams (13, ord ≥ 4)
- 두만강 图们江ord 6len here137.27 km20%total670 km
- 海兰河ord 4len here124.43 km87%total143 km
- 红旗河ord 4len here61.63 km100%total62 km
- 长仁河ord 2len here57.99 km100%total58 km
- 福洞河ord 3len here46.82 km100%total47 km
- 柳洞河ord 3len here22.72 km89%total26 km
- 桦树沟ord 4len here13.19 km100%total13 km
- 牛心河ord 1len here12.18 km100%total12 km
- 홍단수ord 4len here9.61 km11%total87 km
- 东城1号干渠ord 4len here8.67 km100%total9 km
- 연면수ord 5len here7.55 km6%total134 km
- 두만강 - 图们江ord 5len here2.92 km82%total4 km
1 more river segmentssorted by Strahler order + length
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,1nW
Built-up
17,0%
Pesticides
53,3kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)