Ontologia

Commune · CHN

Chang'an

China

CwaTemperate, dry winter, hot summer(55 %)

Species observed

1 453

Observations

6 143

Area

1 602,4km²

Ecological tissue

Sample of 37 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 Chang'an : 29 espèces reliées par 48 interactions GloBI sur 3 types (connectance 7.2%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
48
Connectance
0.072
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

1 453 distinct species · 6 143 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

6 143 obs · 40 cellules
Obs. / cellule
≥ 3 772
218–3 771
40–217
23–39
< 23

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

Climate

Mean T°

12,1°C

Annual rain

928mm

Warmest m°

27,5°C

Coldest m°

-6,1°C

Elevation: 990 m on average (min 385 m, max 2 638 m)

Bioclimatic detailsExpert
Annual mean temp.
12,1°C
Annual rain
928mm
Warmest month
27,5°C
Coldest month
-6,1°C
Mean alt.
990m
Min
385m
Max
2 638m
Std. dev.
631m
Köppen-Geiger (dominant)
CwaTemperate, dry winter, hot summer(55 %)Temperate

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

Soil & lithology

pH H₂O

7,0

Org. C

20,6g/kg

Clay

22,8%

Sand

27,8%

Silt

49,3%

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

Dominant lithology: suGLiMaggregated to Xi'an

3 soil depths detailedExpert
0–5 cm
pH H₂O
7,0
Org. C
34,9g/kg
Clay
21,9%
Sand
28,5%
Silt
49,6%
5–15 cm
pH H₂O
7,0
Org. C
16,4g/kg
Clay
22,7%
Sand
27,8%
Silt
49,6%
15–30 cm
pH H₂O
7,1
Org. C
10,5g/kg
Clay
23,9%
Sand
27,2%
Silt
48,8%

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

Land cover

Forest38.6%
Crops21.8%
Built-up4.2%
Bare soil1.2%
Other (grassland, water…)34.2%

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

Hydrology9 basins · 1 lakes · 20 rivers

Hydrology metrics for this exact territory

Stream length here

317,0km

Lake surface here

0,11km²

Basins crossed

9

Max stream order

3

Max drainage

49 178km²

Discharge in basins

80,4m³/s

Mean precip.

700mm/an

Mean T°

11,7°C

Moisture idx

-0,29

Max snow

3%

Mean runoff

165mm/an

Mean elev. (basins)

1 005m

Watersheds crossing here

Lakes (1, top by area)

Rivers / streams (20, ord ≥ 4)

8 more river segments

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

Human pressure

Pop. density

5hab/km²

Night light

6,9nW

Built-up

416,2%

Pesticides

73,4kg/km²

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