Ontologia

HydroBASINS lev08 watershed · #2080020290

Bassin de la Nivelle - Urdazuri

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 across 2 countries : Navarra, Pyrénées-Atlantiques

Coastal basinPfafstetter: 23190999

Sub-basin area

374,1km²

Upstream area

374,1km²

Discharge

1,72m³/s

Mean elev.

157m

Administrative coverage

2 dept-equivalent regions (GADM L2)

20 communes (GADM L5)

20 intersecting protected areas

11 more protected areas

  • Site De Lur Berria

    IUCN IV

    Biotope Protection Order

    1.42 km² overlap

  • Baie de Chingoudy

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    1.31 km² overlap

  • Aritzakun-Urritzate-Gorramendi

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.72 km² overlap

  • Aritzakun-Urritzate-Gorramendi

    IUCN Not Reported

    Special Protection Area (Birds Directive)

    0.72 km² overlap

  • La Nive

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.24 km² overlap

  • Lac mouriscot

    IUCN IV

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

    0.24 km² overlap

  • Lac de Mouriscot

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

    0.21 km² overlap

  • Errota Handia

    IUCN IV

    Regional Nature Reserve

    0.11 km² overlap

  • Lac marion

    IUCN IV

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

    0.09 km² overlap

  • Baie de cenitz

    IUCN IV

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

    0.03 km² overlap

  • Peral de Bera

    IUCN III

    Natural Monument

    0.00 km² overlap

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

Species present

5 479 distinct species · 326 854 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

326 854 obs · 10 cellules
Obs. / cellule
≥ 66 408
66 408–66 407
40 821–66 407
34 896–40 820
< 34 896

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

Ecological tissue

Sample of 37 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 la Nivelle - Urdazuri : 24 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 122 interactions GloBI sur 6 types (connectance 17.4%, filtre Serrano α=0.2). 14 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
38
Interactions affichées
122
Connectance
0.173
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°

13,3°C

Annual rain

1 320mm

Moisture idx (CMI)

0,33

Runoff

1 048mm/an

PET

883mm

AET

771mm

Mean slope

8,4°

Water table

272cm

Forest

63%

Crops

6%

Urban

14%

Protected

1%

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