Ontologia

HydroBASINS lev08 watershed · #2080050000

Bassin de Afon Nyfer

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 2 administrative regions : Ceredigion, Pembrokeshire

Coastal basinPfafstetter: 23301753

Sub-basin area

621,4km²

Upstream area

621,4km²

Discharge

9,1m³/s

Mean elev.

92m

Administrative coverage

2 dept-equivalent regions (GADM L2)

30 intersecting protected areas

21 more protected areas

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

Species present

10 525 distinct species · 611 542 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

611 542 obs · 19 cellules
Obs. / cellule
≥ 125 010
71 753–125 009
39 111–71 752
23 913–39 110
< 23 913

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

Ecological tissue

Sample of 26 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 Afon Nyfer : 19 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 36 interactions GloBI sur 5 types (connectance 11.1%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
26
Interactions affichées
36
Connectance
0.111
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°

9,5°C

Annual rain

902mm

Moisture idx (CMI)

0,38

Runoff

919mm/an

PET

555mm

AET

478mm

Mean slope

3,9°

Water table

206cm

Forest

19%

Crops

15%

Urban

2%

Protected

61%

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