Ontologia

HydroBASINS lev08 watershed · #2080022040

Bassin de Grand Flet du Magny

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 1 administrative regions : Calvados

Coastal basinPfafstetter: 23230701

Sub-basin area

32km²

Upstream area

32km²

Discharge

0,05m³/s

Mean elev.

13m

Administrative coverage

1 dept-equivalent regions (GADM L2)

11 communes (GADM L5)

3 intersecting protected areas

  • Estuaire de l'Orne

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    3.94 km² overlap

  • Estuaire de l\'orne

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    2.27 km² overlap

  • Batterie de merville

    IUCN IV

    Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

    0.10 km² overlap

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

Species present

1 008 distinct species · 7 540 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

7 540 obs · 1 cellules
Obs. / cellule
≥ 7 540
7 540–7 539
7 540–7 539
7 540–7 539
< 7 540

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

Ecological tissue

Sample of 31 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 Grand Flet du Magny : 26 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 47 interactions GloBI sur 2 types (connectance 10.1%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
31
Interactions affichées
47
Connectance
0.101
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°

10,7°C

Annual rain

685mm

Moisture idx (CMI)

-0,11

Runoff

572mm/an

PET

766mm

AET

539mm

Mean slope

0,7°

Water table

78cm

Forest

3%

Crops

46%

Urban

8%

Protected

7%

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