Ontologia

HydroBASINS lev08 watershed · #2080258240

Bassin de Nigula oja

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 5 administrative regions : Rannu, Rõngu, Tarvastu, Viiratsi, Võrtsjärve

512% lakePfafstetter: 24296493

Sub-basin area

162,3km²

Upstream area

2 584,7km²

Discharge

23,15m³/s

Mean elev.

40m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Rõngu jõgi202 km²

▲ Receives from 2 basins

5 dept-equivalent regions (GADM L2)

  • Võrtsjärve
    Tartu · Estonia
    84.4 km²
    51.8% of basin
  • Rannu
    Tartu · Estonia
    38.2 km²
    23.4% of basin
  • Tarvastu
    Viljandi · Estonia
    17.6 km²
    10.8% of basin
  • Viiratsi
    Viljandi · Estonia
    15.6 km²
    9.5% of basin
  • Rõngu
    Tartu · Estonia
    7.3 km²
    4.5% of basin

30 intersecting protected areas

21 more protected areas

  • VEP nr.207005

    IUCN Not Assigned

    Woodland key habitat

    0.05 km² overlap

  • VEP nr.209099

    IUCN Not Assigned

    Woodland key habitat

    0.05 km² overlap

  • VEP nr.207006

    IUCN Not Assigned

    Woodland key habitat

    0.04 km² overlap

  • VEP nr.207009

    IUCN Not Assigned

    Woodland key habitat

    0.03 km² overlap

  • VEP nr.207708

    IUCN Not Assigned

    Woodland key habitat

    0.03 km² overlap

  • VEP nr.213110

    IUCN Not Assigned

    Woodland key habitat

    0.03 km² overlap

  • VEP nr.208465

    IUCN Not Assigned

    Woodland key habitat

    0.03 km² overlap

  • VEP nr.208469

    IUCN Not Assigned

    Woodland key habitat

    0.03 km² overlap

  • VEP nr.207709

    IUCN Not Assigned

    Woodland key habitat

    0.03 km² overlap

  • VEP nr.207707

    IUCN Not Assigned

    Woodland key habitat

    0.02 km² overlap

  • VEP nr.208466

    IUCN Not Assigned

    Woodland key habitat

    0.02 km² overlap

  • VEP nr.209642

    IUCN Not Assigned

    Woodland key habitat

    0.02 km² overlap

  • VEP nr.207706

    IUCN Not Assigned

    Woodland key habitat

    0.02 km² overlap

  • VEP nr.207008

    IUCN Not Assigned

    Woodland key habitat

    0.02 km² overlap

  • VEP nr.L02202

    IUCN Not Assigned

    Woodland key habitat

    0.02 km² overlap

  • VEP nr.206673

    IUCN Not Assigned

    Woodland key habitat

    0.02 km² overlap

  • VEP nr.151057

    IUCN Not Assigned

    Woodland key habitat

    0.02 km² overlap

  • VEP nr.208749

    IUCN Not Assigned

    Woodland key habitat

    0.01 km² overlap

  • VEP nr.209644

    IUCN Not Assigned

    Woodland key habitat

    0.01 km² overlap

  • VEP nr.208471

    IUCN Not Assigned

    Woodland key habitat

    0.01 km² overlap

  • VEP nr.208538

    IUCN Not Assigned

    Woodland key habitat

    0.01 km² overlap

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

Species present

2 002 distinct species · 13 014 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

13 014 obs · 6 cellules
Obs. / cellule
≥ 4 587
4 587–4 586
3 886–4 586
2 342–3 885
< 2 342

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

Ecological tissue

Sample of 33 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 Nigula oja : 24 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 61 interactions GloBI sur 7 types (connectance 11.6%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
33
Interactions affichées
61
Connectance
0.116
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°

5,3°C

Annual rain

620mm

Moisture idx (CMI)

0,08

Runoff

272mm/an

PET

569mm

AET

433mm

Mean slope

0,5°

Water table

26cm

Forest

20%

Crops

28%

Urban

0%

Protected

52%

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