Ontologia

HydroBASINS lev08 watershed · #2080050130

Bassin de Afon Dulas

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 : Ceredigion, NA, Powys

Pfafstetter: 23301756

Sub-basin area

551,4km²

Upstream area

551,4km²

Discharge

26,72m³/s

Mean elev.

273m

Administrative coverage

3 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

4 499 distinct species · 186 010 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

186 010 obs · 16 cellules
Obs. / cellule
≥ 108 829
16 553–108 828
8 197–16 552
3 637–8 196
< 3 637

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

Ecological tissue

Sample of 13 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 Dulas : 7 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 32 interactions GloBI sur 5 types (connectance 41.0%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
13
Interactions affichées
32
Connectance
0.410
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°

8,2°C

Annual rain

1 306mm

Moisture idx (CMI)

0,56

Runoff

1 268mm/an

PET

570mm

AET

533mm

Mean slope

12,1°

Water table

445cm

Forest

14%

Crops

5%

Urban

0%

Protected

38%

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