Ontologia

HydroBASINS lev08 watershed · #2080033690

Bassin de Bremsa

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 5 administrative regions : Drammen, Hof, Holmestrand, Nedre Eiker, Sande

4% lakePfafstetter: 25105002

Sub-basin area

182,5km²

Upstream area

182,5km²

Discharge

4,09m³/s

Mean elev.

236m

Administrative coverage

5 dept-equivalent regions (GADM L2)

14 intersecting protected areas

5 more protected areas

  • Bremsa

    IUCN Ia

    Nature Reserve

    0.05 km² overlap

  • Trestikle

    IUCN Ia

    Nature Reserve

    0.05 km² overlap

  • Rismyr

    IUCN Ia

    Nature Reserve

    0.05 km² overlap

  • Gunnestad

    IUCN Not Reported

    Natural Monument

    0.00 km² overlap

  • Skalstad

    IUCN Not Reported

    Natural Monument

    0.00 km² overlap

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

Species present

4 974 distinct species · 116 166 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

116 166 obs · 9 cellules
Obs. / cellule
≥ 32 022
32 022–32 021
16 410–32 021
8 181–16 409
< 8 181

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

Ecological tissue

Sample of 34 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 Bremsa : 23 espèces reliées par 113 interactions GloBI sur 6 types (connectance 19.0%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
113
Connectance
0.190
Patrimoniales
0
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°

5,2°C

Annual rain

761mm

Moisture idx (CMI)

0,31

Runoff

699mm/an

PET

522mm

AET

438mm

Mean slope

6,8°

Water table

326cm

Forest

66%

Crops

10%

Urban

4%

Protected

1%

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