Ontologia

Municipality · SWE

Tjörn

Sweden

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

Species observed

5 976

Observations

237 587

Area

171,9km²

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 Tjörn : 23 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 93 interactions GloBI sur 5 types (connectance 17.6%, filtre Serrano α=0.2). 10 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
93
Connectance
0.176
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

5 976 distinct species · 237 587 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

237 587 obs · 6 cellules
Obs. / cellule
≥ 91 482
91 482–91 481
47 105–91 481
29 410–47 104
< 29 410

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

Climate

Mean T°

8,1°C

Annual rain

884mm

Warmest m°

18,2°C

Coldest m°

-1,2°C

Elevation: 21 m on average (min -32 m, max 58 m)

Bioclimatic detailsExpert
Annual mean temp.
8,1°C
Annual rain
884mm
Warmest month
18,2°C
Coldest month
-1,2°C
Mean alt.
21m
Min
-32m
Max
58m
Std. dev.
16m
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

5,1

Org. C

80,9g/kg

Clay

15,6%

Sand

53,7%

Silt

30,6%

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

Dominant lithology: mtGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,1
Org. C
111,9g/kg
Clay
15,3%
Sand
53,6%
Silt
31,1%
5–15 cm
pH H₂O
5,1
Org. C
93,2g/kg
Clay
15,0%
Sand
53,4%
Silt
31,7%
15–30 cm
pH H₂O
5,3
Org. C
37,7g/kg
Clay
16,7%
Sand
54,2%
Silt
29,1%

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

Land cover

Forest40.1%
Crops10.3%
Built-up0.7%
Bare soil3.5%
Other (grassland, water…)45.5%

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

Hydrology1 basins · 2 lakes · 3 rivers

Hydrology metrics for this exact territory

Stream length here

6,6km

Lake surface here

0,53km²

Basins crossed

1

Max stream order

1

Max drainage

1 839km²

Discharge in basins

0,4m³/s

Mean precip.

741mm/an

Mean T°

7,0°C

Moisture idx

0,27

Max snow

30%

Mean runoff

538mm/an

Mean elev. (basins)

53m

Watersheds crossing here

Lakes (2, top by area)

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

Human pressure

Pop. density

0hab/km²

Night light

1,6nW

Built-up

68,5%

Pesticides

4,1kg/km²

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

Protected areas37

IUCN V · 10IUCN Not Reported · 10IUCN Not Assigned · 9IUCN IV · 5IUCN Ia · 3🌊 Marine · 36📍 Point sites · 1

Stigfjorden

IUCN V

Wetland of International Importance (Ramsar Site) · 1989

73 km²

Stigfjorden

IUCN Not Reported

Special Areas of Conservation (Habitats Directive) · 2011

48 km²

Stigfjorden

IUCN Not Reported

Special Protection Area (Birds Directive) · 1996

48 km²

Complete list

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