Ontologia

Ruisseau

Olvár

Crosses 3 administrative regions : Balassagyarmat, Levice, Velký Krtíš

ruisseau

Total length

23km

Max discharge

0,2m³/s

Max Strahler

1

Segments matched

1

River geography3 admin regions · 0 communes

Parent watershed

hybas-20804799402561 km²

3 administrative regions crossed (GADM L2)

9 intersecting protected areas

  • Duna–Ipoly Nemzeti Park

    IUCN V

    National Park

  • Poiplie

    IUCN Not Reported

    Special Protection Area (Birds Directive)

  • Ipoly völgye

    IUCN Not Reported

    Special Protection Area (Birds Directive)

  • Ipoly völgye

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

  • Ipoly Valley

    IUCN V

    Wetland of International Importance (Ramsar Site)

  • Jedzina

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

  • Poiplie

    IUCN Not Reported

    Wetland of International Importance (Ramsar Site)

  • Alúvium Ipľa

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

  • Rataj

    IUCN Not Reported

    Special Areas of Conservation (Habitats Directive)

1 page = 1 named river (aggregation of 1 HydroRIVERS v10 segment). Spatial join cached after first hit.

Species present

314 distinct species · 734 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 27 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 Olvár : 20 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 70 interactions GloBI sur 4 types (connectance 19.9%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
27
Interactions affichées
70
Connectance
0.199
Patrimoniales
1
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydrology (HydroRIVERS v10)

Total length

23km

Max discharge

0,2m³/s

Max Strahler

1

Segments matched

1

HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.