Raet
IUCN Not ReportedNational Park · 2016
608 km²
Municipality · NOR
Tvedestrand
Norway
CfbTemperate, no dry season, warm summer(65 %)
Species observed
7 577
Observations
166 393
Area
226,5km²
Ecological tissue
Sample of 40 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 Tvedestrand : 29 espèces reliées par 97 interactions GloBI sur 6 types (connectance 12.4%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
40
Interactions affichées
97
Connectance
0.124
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
7 577 distinct species · 166 393 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
7,8°C
Annual rain
1 227mm
Warmest m°
20,7°C
Coldest m°
-3,1°C
Elevation: 82 m on average (min -19 m, max 207 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
7,8°C
Annual rain
1 227mm
Warmest month
20,7°C
Coldest month
-3,1°C
Mean alt.
82m
Min
-19m
Max
207m
Std. dev.
49m
Köppen-Geiger (dominant)
CfbTemperate, no dry season, warm summer(65 %)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
116,6g/kg
Clay
8,5%
Sand
59,8%
Silt
31,7%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: mtGLiM
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
4,8
Org. C
144,4g/kg
Clay
7,7%
Sand
60,8%
Silt
31,5%
5–15 cm
pH H₂O
4,8
Org. C
125,6g/kg
Clay
7,5%
Sand
60,8%
Silt
31,8%
15–30 cm
pH H₂O
4,9
Org. C
79,8g/kg
Clay
10,3%
Sand
57,7%
Silt
31,9%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest71.5%
Crops3.0%
Built-up0.1%
Bare soil0.6%
Other (grassland, water…)24.8%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology4 basins · 34 lakes · 10 rivers
Hydrology metrics for this exact territory
Stream length here
53,8km
Lake surface here
10,87km²
Basins crossed
4
Max stream order
3
Max drainage
3 715km²
Discharge in basins
6,5m³/s
Mean precip.
958mm/an
Mean T°
6,5°C
Moisture idx
0,48
Max snow
45%
Mean runoff
864mm/an
Mean elev. (basins)
127m
Watersheds crossing here
Lakes (34, top by area)
- Songevannetarea2,4 km²avg depth16.7 m
- Øynesvannarea1,3 km²avg depth7.8 m
- Ubergsvatnetarea1,1 km²avg depth11.7 m
- Lac 1298088area0,8 km²avg depth6.5 m
- Lac 1298124area0,7 km²avg depth6.9 m
- Lac 1298459area0,6 km²avg depth5.3 m
- Lac 1298196area0,6 km²avg depth6.1 m
- Lac 1298163area0,5 km²avg depth6.9 m
- Lac 1297813area0,5 km²avg depth7.3 m
25 more lakes
- Lac 1297806area0,5 km²avg depth6.2 m
- Lac 1298297area0,4 km²avg depth5.4 m
- Lac 1297996area0,4 km²avg depth8.8 m
- Lac 1298228area0,4 km²avg depth6.0 m
- Lac 1298392area0,4 km²avg depth5.5 m
- Lac 1298506area0,4 km²avg depth7.2 m
- Lac 1298639area0,3 km²avg depth6.0 m
- Lac 1297997area0,3 km²avg depth5.1 m
- Lac 1298106area0,3 km²avg depth5.3 m
- Lac 1298242area0,3 km²avg depth5.6 m
- Lac 1297785area0,2 km²avg depth4.6 m
- Lac 1298056area0,2 km²avg depth4.6 m
- Lac 1298295area0,2 km²avg depth5.7 m
- Lac 1298305area0,2 km²avg depth5.8 m
- Lac 1298458area0,2 km²avg depth7.0 m
- Lac 1298013area0,2 km²avg depth5.6 m
- Lac 1298028area0,2 km²avg depth5.0 m
- Lac 1298485area0,1 km²avg depth2.9 m
- Lac 1297911area0,1 km²avg depth5.5 m
- Lac 1298197area0,1 km²avg depth3.8 m
- Lac 1298215area0,1 km²avg depth6.0 m
- Lac 1298164area0,1 km²avg depth4.0 m
- Lac 1298108area0,1 km²avg depth4.0 m
- Lac 1298104area0,1 km²avg depth5.3 m
- Lac 1298361area0,1 km²avg depth5.7 m
Rivers / streams (10, ord ≥ 4)
- Storelvaord 3len here21.82 km65%total33 km
- Marendalselvaord 2len here5.78 km100%total6 km
- Gjevingelvaord 1len here5.32 km100%total5 km
- Lagelvaord 3len here5.00 km38%total13 km
- Øyneselvaord 1len here4.60 km100%total5 km
- Langangselvaord 1len here3.90 km68%total6 km
- Røsbekkenord 1len here2.61 km100%total3 km
- Dalselvaord 2len here2.40 km39%total6 km
- Beindalselvaord 1len here2.05 km44%total5 km
- Raudelvaord 1len here0.29 km3%total9 km
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
1,2nW
Built-up
13,0%
Pesticides
8,5kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas14
IUCN Ia · 11IUCN Not Reported · 3🌊 Marine · 3
Haugsjåknipen
IUCN Not ReportedEmerald Network
1 km²
Haugsjåknipen
IUCN IaNature Reserve · 2002
1 km²
Fjellheia
IUCN IaNature Reserve · 2009
1 km²
Gulspettvannet
IUCN IaNature Reserve · 2002
1 km²
Nordskogen
IUCN IaNature Reserve · 2002
1 km²
Complete list14 protected areas
- RaetNational ParkIUCN Not Reported2016608 km²
- HaugsjåknipenEmerald NetworkIUCN Not Reported1 km²
- HaugsjåknipenNature ReserveIUCN Ia20021 km²
- FjellheiaNature ReserveIUCN Ia20091 km²
- GulspettvannetNature ReserveIUCN Ia20021 km²
- NordskogenNature ReserveIUCN Ia20021 km²
- Vakerknatten og NøklefjellNature ReserveIUCN Ia20231 km²
- VennevannslieneNature ReserveIUCN Ia20240 km²
- EikåsenNature ReserveIUCN Ia20150 km²
- RosstølNature ReserveIUCN Ia20170 km²
- EidboNature ReserveIUCN Ia20230 km²
- RuholmenNature ReserveIUCN Ia19800 km²
- Lille LestholmenNature ReserveIUCN Ia19800 km²
- SkuggevikNatural MonumentIUCN Not Reported19560 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN