Ontologia

HydroBASINS lev08 watershed · #2080575380

Bassin de Fiume Elsa

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 : Florence, Pisa, Siena

Pfafstetter: 21500840

Sub-basin area

874,9km²

Upstream area

875km²

Discharge

11,32m³/s

Mean elev.

234m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin de Egola766 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

3 dept-equivalent regions (GADM L2)

4 intersecting protected areas

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

Species present

2 856 distinct species · 43 572 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

43 572 obs · 23 cellules
Obs. / cellule
≥ 12 845
3 947–12 844
1 783–3 946
999–1 782
< 999

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

Ecological tissue

Sample of 45 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 Fiume Elsa : 34 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 130 interactions GloBI sur 5 types (connectance 12.6%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
46
Interactions affichées
130
Connectance
0.126
Patrimoniales
1
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°

14,0°C

Annual rain

819mm

Moisture idx (CMI)

-0,17

Runoff

404mm/an

PET

989mm

AET

648mm

Mean slope

6,5°

Water table

254cm

Forest

16%

Crops

53%

Urban

10%

Protected

1%

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