Rivière
Alter Örtzearm
Crosses 1 administrative regions : Celle
Total length
1km
Max discharge
7m³/s
Max Strahler
4
Segments matched
1
River geography1 admin regions · 0 communes
1 administrative regions crossed (GADM L2)
- CelleNiedersachsen · Germany9.8 kmin this dpt
6 intersecting protected areas
Landscape Protection Area
Aller (mit Barnbruch), untere Leine, untere Oker
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Allertal bei Celle
IUCN VLandscape Protection Area
Örtze mit Nebenbächen
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive)
Örtze mit Nebenbächen
IUCN VLandscape Protection Area
Landscape Protection Area
1 page = 1 named river (aggregation of 1 HydroRIVERS v10 segment). Spatial join cached after first hit.
Species present
838 distinct species · 1 691 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 47 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).
Indicateurs du tissu écologique
Tissu écologique de Alter Örtzearm : 29 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 126 interactions GloBI sur 6 types (connectance 11.7%, filtre Serrano α=0.2). 18 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology (HydroRIVERS v10)
Total length
1km
Max discharge
7,0m³/s
Max Strahler
4
Segments matched
1
HydroRIVERS v1.0 (Lehner et al. 2019) aggregated by name + main_riv → 1 entity = 1 named river.