Wetland of International Importance (Ramsar Site) · bel
Marais d'Harchies
- Area
- 6 km²
- IUCN cat.
- Ia
- Year
- 1986
Overview
- Designation
- Wetland of International Importance (Ramsar Site)
- IUCN category
- Ia · Réserve naturelle intégrale
Protection stricte, accès limité aux fins scientifiques
- Established
- 1986
- Managing authority
- « Comité de gestion de la Zone Humide d’Intérêt Biologique des Marais d’Harchies-Hensies-Pommeroeul » Arrêté ministériel du 4 juin 2004,
Source : WDPA (UNEP-WCMC, World Database on Protected Areas).
Species present
2 123 distinct species · 59 482 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Ecological tissue
Sample of 42 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 Marais d'Harchies : 33 espèces dont 3 patrimoniales (LR IUCN CR/EN/VU) reliées par 96 interactions GloBI sur 4 types (connectance 11.1%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).
Hydrology1 basins · 3 lakes · 1 rivers
Hydrology metrics for this exact territory
Lake surface here
0,70km²
Basins crossed
1
Max stream order
4
Max drainage
1 107km²
Discharge in basins
0,1m³/s
Mean precip.
794mm/an
Mean T°
9,9°C
Moisture idx
0,04
Max snow
7%
Mean runoff
413mm/an
Mean elev. (basins)
91m
Watersheds crossing here
Lakes (3, top by area)
Rivers / streams (1, ord ≥ 4)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Location
Fond cartographique : OpenFreeMap · © OpenStreetMap contributors · Géométrie : nos sources (GADM/HydroBASINS/HydroLAKES/HydroRIVERS/WDPA)
- Centroid
- 50.46369, 3.68551
- Open in maps
- OpenStreetMap → · Satellite →
Species observed (Phase 2)
Listing species observed within this protected area requires the GBIF v2 partition × WDPA spatial overlay matview. Computing infrastructure pending.