Ontologia

HydroBASINS lev08 watershed · #2080033800

Bassin de Sagelva

A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.

Crosses 3 administrative regions : Gjerstad, Kragerø, Risør

Coastal basin 50% lakePfafstetter: 25107103

Sub-basin area

197,6km²

Upstream area

197,6km²

Discharge

4,94m³/s

Mean elev.

70m

Administrative coverage

3 dept-equivalent regions (GADM L2)

16 intersecting protected areas

7 more protected areas

  • Lun

    IUCN Ia

    Nature Reserve

    0.13 km² overlap

  • Brattøykollen

    IUCN Ia

    Nature Reserve

    0.11 km² overlap

  • Knipheia

    IUCN Ia

    Nature Reserve

    0.09 km² overlap

  • Bumyr

    IUCN Ia

    Nature Reserve

    0.08 km² overlap

  • Stangholmen

    IUCN Ia

    Nature Reserve

    0.04 km² overlap

  • Kjeholmskjæra

    IUCN Ia

    Nature Reserve

    0.03 km² overlap

  • Barland

    IUCN Not Reported

    Botanical Protection of Species

    0.00 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

3 635 distinct species · 34 614 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

34 614 obs · 7 cellules
Obs. / cellule
≥ 13 862
13 862–13 861
5 632–13 861
3 411–5 631
< 3 411

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

Ecological tissue

Sample of 36 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 Bassin de Sagelva : 25 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 100 interactions GloBI sur 6 types (connectance 15.0%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
100
Connectance
0.150
Patrimoniales
2
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydroclimate (BasinATLAS lev08)

Mean T°

6,7°C

Annual rain

831mm

Moisture idx (CMI)

0,39

Runoff

798mm/an

PET

505mm

AET

434mm

Mean slope

5,2°

Water table

286cm

Forest

99%

Crops

0%

Urban

0%

Protected

2%

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)