Ontologia

Commune · CHE

Grenchen

Switzerland

CfbTemperate, no dry season, warm summer(63 %)

Species observed

2 995

Observations

20 987

Area

26,2km²

Ecological tissue

Sample of 33 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 Grenchen : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 134 interactions GloBI sur 6 types (connectance 25.4%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
134
Connectance
0.254
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Species present

2 995 distinct species · 20 987 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

20 987 obs · 1 cellules
Obs. / cellule
≥ 20 987
20 987–20 986
20 987–20 986
20 987–20 986
< 20 987

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

Climate

Mean T°

8,4°C

Annual rain

1 508mm

Warmest m°

21,3°C

Coldest m°

-3,9°C

Elevation: 738 m on average (min 428 m, max 1 269 m)

Bioclimatic detailsExpert
Annual mean temp.
8,4°C
Annual rain
1 508mm
Warmest month
21,3°C
Coldest month
-3,9°C
Mean alt.
738m
Min
428m
Max
1 269m
Std. dev.
309m
Köppen-Geiger (dominant)
CfbTemperate, no dry season, warm summer(63 %)Temperate

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

Soil & lithology

pH H₂O

6,2

Org. C

69,8g/kg

Clay

34,2%

Sand

26,4%

Silt

39,4%

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

Dominant lithology: suGLiMaggregated to Lebern

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,1
Org. C
104,0g/kg
Clay
34,4%
Sand
26,4%
Silt
39,2%
5–15 cm
pH H₂O
6,3
Org. C
65,2g/kg
Clay
34,3%
Sand
26,5%
Silt
39,3%
15–30 cm
pH H₂O
6,3
Org. C
40,2g/kg
Clay
34,0%
Sand
26,3%
Silt
39,7%

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

Land cover

Forest31.7%
Crops26.8%
Built-up3.3%
Bare soil0.7%
Other (grassland, water…)37.6%

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

Hydrology2 basins · 0 lakes · 4 rivers

Hydrology metrics for this exact territory

Stream length here

4,0km

Basins crossed

2

Max stream order

6

Max drainage

8 397km²

Discharge in basins

9,5m³/s

Mean precip.

1 080mm/an

Mean T°

7,6°C

Moisture idx

0,29

Max snow

20%

Mean runoff

695mm/an

Mean elev. (basins)

722m

Watersheds crossing here

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

Human pressure

Pop. density

4hab/km²

Night light

3,5nW

Built-up

325,9%

Pesticides

53,5kg/km²

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

Protected areas8

IUCN IV · 5IUCN Not Assigned · 3

Grenchner Witi

IUCN IV

Federal Inventory of Amphibian Spawning Areas of National Importance · 2017

6 km²

Witi (BE,SO)

IUCN IV

Federal Inventory of Reserves for Waterbirds and Migratory Birds of International and National Imp. · 1992

4 km²

Wandflue

IUCN Not Assigned

Forest Reserves · 2023

0 km²

Aare bei Altreu

IUCN IV

Federal Inventory of Alluvial Zones of National Importance · 1992

0 km²

Schwelli

IUCN Not Assigned

Forest Reserves · 2023

0 km²

Complete list

WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN