Ontologia

HydroBASINS lev08 watershed · #4080045800

Bassin de 八尾川

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 4 administrative regions : Ama, Chibu, Nishinoshima, Okinoshima

Coastal basinPfafstetter: 41308000

Sub-basin area

418,2km²

Upstream area

418,2km²

Discharge

5,49m³/s

Mean elev.

111m

Administrative coverage

4 dept-equivalent regions (GADM L2)

12 intersecting protected areas

  • Daisen oki

    IUCN V

    National Park

    135.94 km² overlap

  • Common fishery right area(Shimane)

    IUCN VI

    Common fishery right area

    72.75 km² overlap

  • Oki

    IUCN VI

    Coastline Marine Resource Development Area, designated sea area

    60.68 km² overlap

  • Daimanji

    IUCN IV

    Prefectural Wildlife Protection Area

    4.00 km² overlap

  • Takuhiyama

    IUCN IV

    Prefectural Wildlife Protection Area

    3.89 km² overlap

  • Ama

    IUCN IV

    Prefectural Wildlife Protection Area

    1.77 km² overlap

  • Shirashima

    IUCN IV

    Prefectural Wildlife Protection Area

    1.20 km² overlap

  • Okishakunage jiseirin

    IUCN V

    Prefectural Nature Conservation Area

    0.74 km² overlap

  • Omori

    IUCN IV

    Prefectural Wildlife Protection Area

    0.30 km² overlap

3 more protected areas

  • Oki kokubunji

    IUCN IV

    Prefectural Wildlife Protection Area

    0.28 km² overlap

  • Ohakajima

    IUCN IV

    Prefectural Wildlife Protection Area

    0.18 km² overlap

  • Kamenohara ike

    IUCN IV

    Prefectural Wildlife Protection Area

    0.03 km² overlap

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

Species present

661 distinct species · 1 650 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 650 obs · 8 cellules
Obs. / cellule
≥ 371
371–370
211–370
199–210
< 199

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

Ecological tissue

Sample of 22 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 八尾川 : 19 espèces reliées par 22 interactions GloBI sur 3 types (connectance 8.0%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
24
Interactions affichées
22
Connectance
0.080
Patrimoniales
0
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°

13,5°C

Annual rain

1 866mm

Moisture idx (CMI)

0,50

Runoff

1 194mm/an

PET

939mm

AET

927mm

Mean slope

12,0°

Water table

405cm

Forest

58%

Crops

6%

Urban

2%

Protected

34%

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