Grenchner Witi
IUCN IVFederal Inventory of Amphibian Spawning Areas of National Importance · 2017
6 km²
Commune · CHE
Arch
Switzerland
CfbTemperate, no dry season, warm summer(100 %)
Species observed
2 767
Observations
30 323
Area
6,5km²
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 Arch : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 90 interactions GloBI sur 5 types (connectance 12.8%, filtre Serrano α=0.2). 15 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
38
Interactions affichées
90
Connectance
0.128
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
2 767 distinct species · 30 323 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
10,0°C
Annual rain
1 254mm
Warmest m°
23,2°C
Coldest m°
-2,9°C
Elevation: 478 m on average (min 428 m, max 549 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
10,0°C
Annual rain
1 254mm
Warmest month
23,2°C
Coldest month
-2,9°C
Mean alt.
478m
Min
428m
Max
549m
Std. dev.
47m
Köppen-Geiger (dominant)
CfbTemperate, no dry season, warm summer(100 %)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
56,8g/kg
Clay
28,2%
Sand
34,3%
Silt
37,5%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: suGLiMaggregated to Büren
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,1
Org. C
84,4g/kg
Clay
28,6%
Sand
34,3%
Silt
37,0%
5–15 cm
pH H₂O
6,2
Org. C
48,8g/kg
Clay
27,8%
Sand
34,4%
Silt
37,9%
15–30 cm
pH H₂O
6,2
Org. C
37,0g/kg
Clay
28,1%
Sand
34,2%
Silt
37,7%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest27.6%
Crops33.4%
Built-up2.2%
Bare soil1.1%
Other (grassland, water…)35.8%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology1 basins · 0 lakes · 3 rivers
Hydrology metrics for this exact territory
Stream length here
4,2km
Basins crossed
1
Max stream order
6
Max drainage
8 397km²
Discharge in basins
2,5m³/s
Mean precip.
1 080mm/an
Mean T°
7,6°C
Moisture idx
0,29
Max snow
19%
Mean runoff
697mm/an
Mean elev. (basins)
721m
Watersheds crossing here
Rivers / streams (3, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
1hab/km²
Night light
2,1nW
Built-up
217,8%
Pesticides
52,7kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas5
IUCN IV · 5
Witi (BE,SO)
IUCN IVFederal Inventory of Reserves for Waterbirds and Migratory Birds of International and National Imp. · 1992
4 km²
Aare bei Altreu
IUCN IVFederal Inventory of Alluvial Zones of National Importance · 1992
0 km²
Kieswerk Schopsberg
IUCN IVFederal Inventory of Amphibian Spawning Areas of National Importance · 2003
0 km²
Widi
IUCN IVFederal Inventory of Amphibian Spawning Areas of National Importance · 2001
0 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN