Ontologia — Encyclopédie du vivant

River geography4 admin regions · 65 communes

Parent watershed

hybas-2080461420349 km²

4 administrative regions crossed (GADM L2)

Haute-Marne
Grand Est · France
81.0 km
in this dpt
Eure-et-Loir
Centre-Val de Loire · France
55.6 km
in this dpt
Marne
Grand Est · France
14.7 km
in this dpt
Eure
Normandie · France
0.2 km
in this dpt

65 communes (L5)For countries with L5

10 intersecting protected areas

Etangs de la Champagne humide
IUCN Not Reported
Wetland of International Importance (Ramsar Site)
Perche
IUCN V
Regional Nature Park
Forêts et étangs du Perche
IUCN Not Reported
Special Protection Area (Birds Directive)
Lac du Der
IUCN Not Reported
Special Protection Area (Birds Directive)
Réservoir de la Marne dit du Der-Chantecoq
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
Le Der Chantecoq Et Les Étangs D\'Outines Et D\'Arrigny
IUCN IV
National Hunting and Wildlife Reserve
Herbages et cultures autour du lac du Der
IUCN Not Reported
Special Protection Area (Birds Directive)
Vallée de l'Eure de Maintenon à Anet et vallons affluents
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
Argentolle - etangs d\'outines et d\'arrigny
IUCN IV
Land acquired by Conservatoire du Littoral (national seaside and lakeside conservancy)

1 more protected areassorted by area

cote de montreuil (la)
IUCN IV
Land acquired by a regional conservatory of natural areas

1 page = 1 named river (aggregation of 29 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

1 522 distinct species · 24 874 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 38 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

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de La Blaise : 33 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 83 interactions GloBI sur 6 types (connectance 11.8%, filtre Serrano α=0.2). 5 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

38

Interactions affichées

83

Connectance

0.118

Patrimoniales

2

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

155km

Max discharge

19,7m³/s

Max Strahler

5

Segments matched

29

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

La Blaise

🗺️River geography4 admin regions · 65 communes