Ontologia

Municipality · NOR

Arendal

Norway

CfbTemperate, no dry season, warm summer(94 %)

Species observed

6 803

Observations

178 028

Area

285,8km²

Ecological tissue

Sample of 39 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 Arendal : 34 espèces + 5 bulles famille, 86 interactions GloBI documentées sur 4 types (connectance 11.6%, filtre Serrano α=0.2). Les 5 bulles regroupent des espèces visuellement absorbées par famille (≥3 espèces visibles).

Espèces affichées
39
Interactions affichées
86
Connectance
0.116
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

6 803 distinct species · 178 028 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

178 028 obs · 9 cellules
Obs. / cellule
≥ 55 284
55 284–55 283
19 789–55 283
14 514–19 788
< 14 514

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

Climate

Mean T°

8,0°C

Annual rain

1 260mm

Warmest m°

20,8°C

Coldest m°

-2,8°C

Elevation: 56 m on average (min -70 m, max 204 m)

Bioclimatic detailsExpert
Annual mean temp.
8,0°C
Annual rain
1 260mm
Warmest month
20,8°C
Coldest month
-2,8°C
Mean alt.
56m
Min
-70m
Max
204m
Std. dev.
40m
Köppen-Geiger (dominant)
CfbTemperate, no dry season, warm summer(94 %)Temperate

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

Soil & lithology

pH H₂O

4,8

Org. C

116,3g/kg

Clay

8,7%

Sand

60,9%

Silt

30,4%

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

Dominant lithology: mtGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
4,8
Org. C
148,1g/kg
Clay
8,0%
Sand
62,0%
Silt
29,9%
5–15 cm
pH H₂O
4,8
Org. C
127,0g/kg
Clay
7,8%
Sand
61,6%
Silt
30,5%
15–30 cm
pH H₂O
4,9
Org. C
73,9g/kg
Clay
10,3%
Sand
59,1%
Silt
30,6%

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

Land cover

Forest64.7%
Crops3.8%
Built-up0.6%
Bare soil0.7%
Other (grassland, water…)30.1%

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

Hydrology6 basins · 38 lakes · 15 rivers

Hydrology metrics for this exact territory

Stream length here

77,2km

Lake surface here

14,30km²

Basins crossed

6

Max stream order

4

Max drainage

4 024km²

Discharge in basins

87,4m³/s

Mean precip.

1 010mm/an

Mean T°

6,8°C

Moisture idx

0,51

Max snow

45%

Mean runoff

891mm/an

Mean elev. (basins)

86m

Watersheds crossing here

Lakes (38, top by area)

29 more lakes

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

Human pressure

Pop. density

1hab/km²

Night light

3,8nW

Built-up

64,2%

Pesticides

13,6kg/km²

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

Protected areas10

IUCN Ia · 6IUCN Not Reported · 4🌊 Marine · 2

Raet

IUCN Not Reported

National Park · 2016

608 km²

Bjorsund

IUCN Ia

Nature Reserve · 1982

1 km²

Lauvåsen

IUCN Not Reported

Emerald Network

0 km²

Complete list

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