Ontologia

HydroBASINS lev08 watershed · #2080055850

Bassin de Tolka

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 6 administrative regions : Ashbourne, Drogheda, Dublin City, Fingal, Laytown - Bettystown +1

Coastal basinPfafstetter: 23400930

Sub-basin area

961,6km²

Upstream area

961,6km²

Discharge

0,17m³/s

Mean elev.

57m

Administrative coverage

6 dept-equivalent regions (GADM L2)

29 intersecting protected areas

  • Dublin Bay

    IUCN Not Applicable

    UNESCO-MAB Biosphere Reserve

    15.53 km² overlap

  • North Bull Island SPA

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    7.69 km² overlap

  • Malahide Estuary

    IUCN Not Reported

    Marine Protected Area (OSPAR)

    7.66 km² overlap

  • Malahide Estuary SAC

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    7.60 km² overlap

  • Malahide Estuary SPA

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    7.12 km² overlap

  • North Dublin Bay

    IUCN Not Reported

    Marine Protected Area (OSPAR)

    6.23 km² overlap

  • North Dublin Bay SAC

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    6.15 km² overlap

  • The Broadmeadow Estuary

    IUCN IV

    Wetland of International Importance (Ramsar Site)

    5.58 km² overlap

  • North Bull Island

    IUCN IV

    Wetland of International Importance (Ramsar Site)

    5.19 km² overlap

20 more protected areas

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

Species present

3 961 distinct species · 222 373 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

222 373 obs · 28 cellules
Obs. / cellule
≥ 50 405
41 557–50 404
2 879–41 556
1 017–2 878
< 1 017

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

Ecological tissue

Sample of 38 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 Tolka : 29 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 95 interactions GloBI sur 6 types (connectance 13.5%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
95
Connectance
0.135
Patrimoniales
3
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°

9,4°C

Annual rain

816mm

Moisture idx (CMI)

0,23

Runoff

664mm/an

PET

624mm

AET

516mm

Mean slope

1,2°

Water table

68cm

Forest

3%

Crops

22%

Urban

20%

Protected

0%

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