Ontologia

Prefecture City · CHN

Yan'an

China

DwaCold, dry winter, hot summer(68 %)

Species observed

1 246

Observations

4 436

Area

36 951,6km²

Ecological tissue

Sample of 20 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 : 15 espèces reliées par 23 interactions GloBI sur 3 types (connectance 12.1%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
20
Interactions affichées
23
Connectance
0.121
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

1 246 distinct species · 4 436 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 436 obs · 99 cellules
Obs. / cellule
≥ 1 517
127–1 516
4–126
1–3
< 1

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

Climate

Mean T°

9,6°C

Annual rain

588mm

Warmest m°

27,3°C

Coldest m°

-10,4°C

Elevation: 1 242 m on average (min 497 m, max 1 709 m)

Bioclimatic detailsExpert
Annual mean temp.
9,6°C
Annual rain
588mm
Warmest month
27,3°C
Coldest month
-10,4°C
Mean alt.
1 242m
Min
497m
Max
1 709m
Std. dev.
204m
Köppen-Geiger (dominant)
DwaCold, dry winter, hot summer(68 %)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

15,6g/kg

Clay

19,5%

Sand

37,5%

Silt

43,0%

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

Dominant lithology: ssGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,9
Org. C
27,3g/kg
Clay
19,0%
Sand
37,9%
Silt
43,1%
5–15 cm
pH H₂O
8,0
Org. C
11,2g/kg
Clay
19,9%
Sand
37,4%
Silt
42,7%
15–30 cm
pH H₂O
8,0
Org. C
8,2g/kg
Clay
19,8%
Sand
37,2%
Silt
43,1%

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

Land cover

Forest32.4%
Crops14.7%
Built-up0.2%
Bare soil1.8%
Other (grassland, water…)51.0%

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

Hydrology81 basins · 16 lakes · 27 rivers

Hydrology metrics for this exact territory

Stream length here

3 191,0km

Lake surface here

20,22km²

Basins crossed

81

Max stream order

7

Max drainage

505 431km²

Discharge in basins

3 740,1m³/s

Mean precip.

505mm/an

Mean T°

9,2°C

Moisture idx

-0,51

Max snow

2%

Mean runoff

56mm/an

Mean elev. (basins)

1 238m

Watersheds crossing here

72 more basins

Lakes (16, top by area)

7 more lakes

Rivers / streams (27, ord ≥ 4)

15 more river segments

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

Human pressure

Pop. density

0hab/km²

Night light

0,5nW

Built-up

17,6%

Pesticides

67,4kg/km²

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

Sub-administrations12