Ontologia

HydroBASINS lev08 watershed · #7080752770

Bassin de Atchafalaya River

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 3 administrative regions : Iberville, Saint Landry, Saint Martin

Pfafstetter: 74300467

Sub-basin area

139,6km²

Upstream area

1 915,3km²

Discharge

42,92m³/s

Mean elev.

15m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Chicot Pass500 km²

▲ Receives from 2 basins

3 dept-equivalent regions (GADM L2)

1 intersecting protected areas

  • Atchafalaya

    IUCN IV

    National Wildlife Refuge

    24.68 km² overlap

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

Species present

811 distinct species · 18 852 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

18 852 obs · 3 cellules
Obs. / cellule
≥ 13 930
13 930–13 929
13 930–13 929
3 005–13 929
< 3 005

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

Ecological tissue

Sample of 40 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 Atchafalaya River : 28 espèces reliées par 68 interactions GloBI sur 4 types (connectance 8.3%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
68
Connectance
0.083
Patrimoniales
0
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°

19,4°C

Annual rain

1 509mm

Moisture idx (CMI)

0,07

Runoff

731mm/an

PET

1 410mm

AET

1 172mm

Mean slope

0,5°

Water table

24cm

Forest

88%

Crops

6%

Urban

0%

Protected

0%

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