Ontologia

HydroBASINS lev08 watershed · #6080009570

Bassin de Rio Marciano

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 : Belágua, Primeira Cruz, Santo Amaro do Maranhão

12% lakePfafstetter: 63109400

Sub-basin area

1 672,7km²

Upstream area

1 673km²

Discharge

53,94m³/s

Mean elev.

33m

Administrative coverage

3 dept-equivalent regions (GADM L2)

4 intersecting protected areas

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

Species present

265 distinct species · 1 376 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 376 obs · 28 cellules
Obs. / cellule
≥ 494
229–493
19–228
9–18
< 9

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

Ecological tissue

Sample of 36 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 Rio Marciano : 27 espèces reliées par 40 interactions GloBI sur 2 types (connectance 6.3%, filtre Serrano α=0.2). 9 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
36
Interactions affichées
40
Connectance
0.064
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°

27,1°C

Annual rain

1 674mm

Moisture idx (CMI)

0,03

Runoff

996mm/an

PET

1 632mm

AET

1 035mm

Mean slope

0,2°

Water table

6cm

Forest

15%

Crops

4%

Urban

0%

Protected

93%

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