Ontologia

HydroBASINS lev08 watershed · #2080056590

Bassin de Mern Å

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 4 administrative regions : Faxe, Næstved, Stevns, Vordingborg

Coastal basinPfafstetter: 24100039

Sub-basin area

543,6km²

Upstream area

543,6km²

Discharge

2,99m³/s

Mean elev.

26m

Administrative coverage

4 dept-equivalent regions (GADM L2)

26 intersecting protected areas

17 more protected areas

  • Faxe Kommune private

    IUCN Not Assigned

    §3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)

    5.98 km² overlap

  • Vordingborg Kommune public

    IUCN IV

    §3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)

    2.60 km² overlap

  • Næstved Kommune private

    IUCN Not Assigned

    §3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)

    1.72 km² overlap

  • Stevns Kommune private

    IUCN Not Assigned

    §3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)

    1.63 km² overlap

  • Feddet - Præstø Fjord

    IUCN IV

    Protected by conservation order, excl. Church surroundings

    1.40 km² overlap

  • Skove ved Vemmetofte

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    1.16 km² overlap

  • Stevns Klint

    IUCN Not Applicable

    World Heritage Site (natural or mixed)

    0.49 km² overlap

  • Stevns Kommune public

    IUCN IV

    §3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)

    0.41 km² overlap

  • Lekkende Dyrehave

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.40 km² overlap

  • Faxe Kommune public

    IUCN IV

    §3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)

    0.30 km² overlap

  • Gammel Dyrehave

    IUCN IV

    Protected by conservation order, excl. Church surroundings

    0.13 km² overlap

  • Nysø, Bøndernes Egehoved

    IUCN IV

    Protected by conservation order, excl. Church surroundings

    0.12 km² overlap

  • Hammer-Torup Bakker

    IUCN V

    Protected by conservation order, excl. Church surroundings

    0.09 km² overlap

  • Næstved Kommune public

    IUCN IV

    §3 protected habitats (all lakes, bogs, streams, heaths and meadows etc.)

    0.08 km² overlap

  • Holtug Kridtbrud

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.06 km² overlap

  • Kulsbjerge

    IUCN IV

    Protected by conservation order, excl. Church surroundings

    0.04 km² overlap

  • Søer ved Bregentved og Gisselfeld

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    0.00 km² overlap

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

Species present

7 134 distinct species · 692 613 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

692 613 obs · 18 cellules
Obs. / cellule
≥ 231 143
133 901–231 142
25 962–133 900
23 055–25 961
< 23 055

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

Ecological tissue

Sample of 30 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 Mern Å : 21 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 84 interactions GloBI sur 6 types (connectance 16.9%, filtre Serrano α=0.2). 11 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
32
Interactions affichées
84
Connectance
0.169
Patrimoniales
1
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°

8,3°C

Annual rain

583mm

Moisture idx (CMI)

0,08

Runoff

366mm/an

PET

537mm

AET

432mm

Mean slope

1,0°

Water table

69cm

Forest

17%

Crops

56%

Urban

0%

Protected

6%

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