Ontologia

HydroBASINS lev08 watershed · #4080044670

Bassin de 小糸川

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 12 administrative regions : Futtsu, Isumi, Kamogawa, Katsuura, Kimitsu +7

Coastal basinPfafstetter: 41301715

Sub-basin area

1 162,5km²

Upstream area

1 162,5km²

Discharge

10,54m³/s

Mean elev.

86m

Administrative coverage

12 dept-equivalent regions (GADM L2)

4 more

29 intersecting protected areas

  • Minamiboso

    IUCN V

    Quasi National Park

    98.86 km² overlap

  • Common fishery right area(Chiba)

    IUCN VI

    Common fishery right area

    45.74 km² overlap

  • Isumi

    IUCN IV

    Prefectural Wildlife Protection Area

    38.99 km² overlap

  • Takagoyama

    IUCN IV

    Prefectural Wildlife Protection Area

    25.14 km² overlap

  • Takago yama

    IUCN V

    Prefectural Natural Park

    23.89 km² overlap

  • Mishima

    IUCN IV

    Prefectural Wildlife Protection Area

    19.29 km² overlap

  • Mineoka sankei

    IUCN V

    Prefectural Natural Park

    17.32 km² overlap

  • Kinadayama

    IUCN IV

    Prefectural Wildlife Protection Area

    14.48 km² overlap

  • Kanbe

    IUCN IV

    Prefectural Wildlife Protection Area

    11.72 km² overlap

20 more protected areas

  • Mineokayama

    IUCN IV

    Prefectural Wildlife Protection Area

    11.69 km² overlap

  • Miyoshi

    IUCN IV

    Prefectural Wildlife Protection Area

    10.08 km² overlap

  • Amatsu

    IUCN IV

    Prefectural Wildlife Protection Area

    9.79 km² overlap

  • Kisarazu

    IUCN IV

    Prefectural Wildlife Protection Area

    7.90 km² overlap

  • Kiyosumiyama

    IUCN IV

    Prefectural Wildlife Protection Area

    7.22 km² overlap

  • Tomi san

    IUCN V

    Prefectural Natural Park

    6.71 km² overlap

  • Seiwa

    IUCN V

    Prefectural Nature Conservation Area

    5.91 km² overlap

  • Shirahama

    IUCN V

    Prefectural Nature Conservation Area

    5.06 km² overlap

  • Futtsu misaki

    IUCN IV

    Prefectural Wildlife Protection Area

    2.94 km² overlap

  • Yoro keikoku okukiyosumi

    IUCN V

    Prefectural Natural Park

    1.77 km² overlap

  • Uchiura yama

    IUCN V

    Prefectural Nature Conservation Area

    1.56 km² overlap

  • Takatsuka yama

    IUCN V

    Prefectural Nature Conservation Area

    1.15 km² overlap

  • Motokiyosumi yama

    IUCN V

    Prefectural Nature Conservation Area

    0.94 km² overlap

  • Motokiyozumiyama Tsuga・Himekomatsu Idenshigen

    IUCN IV

    Rare Population Protected Forest

    0.39 km² overlap

  • Gakechi shokusei

    IUCN V

    Prefectural Nature Conservation Area

    0.33 km² overlap

  • Komatsuji no mori

    IUCN V

    Local Environment Conservation Area(Chiba)

    0.13 km² overlap

  • Shakudouji no mori

    IUCN V

    Local Environment Conservation Area(Chiba)

    0.07 km² overlap

  • Ishido

    IUCN IV

    Prefectural Wildlife Protection Area

    0.05 km² overlap

  • Minamiboso Momi

    IUCN IV

    Rare Population Protected Forest

    0.05 km² overlap

  • Shimizu kannon no mori

    IUCN V

    Local Environment Conservation Area(Chiba)

    0.00 km² overlap

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

Species present

3 849 distinct species · 59 719 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

59 719 obs · 33 cellules
Obs. / cellule
≥ 35 248
2 114–35 247
805–2 113
585–804
< 585

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 小糸川 : 30 espèces reliées par 49 interactions GloBI sur 4 types (connectance 6.6%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
39
Interactions affichées
49
Connectance
0.066
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°

15,2°C

Annual rain

1 807mm

Moisture idx (CMI)

0,47

Runoff

873mm/an

PET

959mm

AET

957mm

Mean slope

6,2°

Water table

191cm

Forest

69%

Crops

28%

Urban

26%

Protected

23%

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