Ontologia

Commune · CHN

Yan An

China

DwaCold, dry winter, hot summer(94 %)

Species observed

157

Observations

254

Area

3 536,6km²

Ecological tissue

Sample of 38 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 Yan An : 34 espèces reliées par 57 interactions GloBI sur 5 types (connectance 8.1%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
57
Connectance
0.081
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

157 distinct species · 254 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

254 obs · 16 cellules
Obs. / cellule
≥ 158
30–157
13–29
3–12
< 3

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

Climate

Mean T°

10,0°C

Annual rain

570mm

Warmest m°

28,1°C

Coldest m°

-10,4°C

Elevation: 1 164 m on average (min 918 m, max 1 451 m)

Bioclimatic detailsExpert
Annual mean temp.
10,0°C
Annual rain
570mm
Warmest month
28,1°C
Coldest month
-10,4°C
Mean alt.
1 164m
Min
918m
Max
1 451m
Std. dev.
98m
Köppen-Geiger (dominant)
DwaCold, dry winter, hot summer(94 %)Cold

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

Soil & lithology

pH H₂O

8,0

Org. C

15,0g/kg

Clay

17,1%

Sand

41,0%

Silt

41,9%

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

Dominant lithology: ssGLiMaggregated to Yan'an

3 soil depths detailedExpert
0–5 cm
pH H₂O
8,0
Org. C
26,7g/kg
Clay
16,5%
Sand
41,4%
Silt
42,0%
5–15 cm
pH H₂O
8,0
Org. C
10,2g/kg
Clay
17,5%
Sand
40,9%
Silt
41,6%
15–30 cm
pH H₂O
8,1
Org. C
8,1g/kg
Clay
17,3%
Sand
40,7%
Silt
42,1%

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

Land cover

Forest33.2%
Crops14.0%
Built-up0.3%
Bare soil1.1%
Other (grassland, water…)51.4%

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

Hydrology15 basins · 1 lakes · 4 rivers

Hydrology metrics for this exact territory

Stream length here

211,6km

Lake surface here

0,23km²

Basins crossed

15

Max stream order

4

Max drainage

499 299km²

Discharge in basins

465,8m³/s

Mean precip.

518mm/an

Mean T°

9,5°C

Moisture idx

-0,52

Max snow

1%

Mean runoff

55mm/an

Mean elev. (basins)

1 119m

Watersheds crossing here

6 more basins

Lakes (1, top by area)

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

Human pressure

Pop. density

1hab/km²

Night light

1,1nW

Built-up

34,1%

Pesticides

71,0kg/km²

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