Ontologia

Commune · CAN

Waltham

Canada

DfbCold, no dry season, warm summer(100 %)

Species observed

297

Observations

1 602

Area

398,9km²

Ecological tissue

Sample of 22 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 Waltham : 16 espèces + 6 bulles famille, 30 interactions GloBI documentées sur 2 types (connectance 13.0%, filtre Serrano α=0.2). Les 6 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
22
Interactions affichées
30
Connectance
0.130
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

297 distinct species · 1 602 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 602 obs · 9 cellules
Obs. / cellule
≥ 739
739–738
195–738
123–194
< 123

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

Climate

Mean T°

4,8°C

Annual rain

940mm

Warmest m°

23,8°C

Coldest m°

-15,5°C

Elevation: 245 m on average (min 105 m, max 321 m)

Bioclimatic detailsExpert
Annual mean temp.
4,8°C
Annual rain
940mm
Warmest month
23,8°C
Coldest month
-15,5°C
Mean alt.
245m
Min
105m
Max
321m
Std. dev.
46m
Köppen-Geiger (dominant)
DfbCold, no dry season, warm summer(100 %)Cold

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

Soil & lithology

pH H₂O

5,4

Org. C

54,1g/kg

Clay

27,6%

Sand

31,8%

Silt

40,6%

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

Dominant lithology: mtGLiMaggregated to Pontiac

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,3
Org. C
87,4g/kg
Clay
27,8%
Sand
31,2%
Silt
41,0%
5–15 cm
pH H₂O
5,4
Org. C
47,6g/kg
Clay
27,5%
Sand
31,6%
Silt
40,9%
15–30 cm
pH H₂O
5,5
Org. C
27,2g/kg
Clay
27,3%
Sand
32,7%
Silt
40,0%

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

Land cover

Forest85.0%
Crops0.5%
Built-up0.0%
Bare soil1.3%
Other (grassland, water…)13.2%

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

Hydrology9 basins · 50 lakes · 6 rivers

Hydrology metrics for this exact territory

Stream length here

71,0km

Lake surface here

25,77km²

Basins crossed

9

Max stream order

7

Max drainage

69 159km²

Discharge in basins

213,0m³/s

Mean precip.

874mm/an

Mean T°

4,3°C

Moisture idx

0,07

Max snow

42%

Mean runoff

354mm/an

Mean elev. (basins)

249m

Watersheds crossing here

Lakes (50, top by area)

41 more lakes

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

Human pressure

Pop. density

0hab/km²

Night light

0,0nW

Built-up

1,5%

Pesticides

2,5kg/km²

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

Protected areas11

IUCN IV · 8IUCN Not Reported · 1IUCN Ia · 1IUCN VI · 1
Complete list

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