Lago di Bolsena, Isole Bisentina e Martana
IUCN Not ReportedSpecial Protection Area (Birds Directive) · 1999
115 km²
Commune · ITA
Gradoli
Italy
CsaTemperate, dry summer, hot summer(100 %)
Species observed
204
Observations
1 492
Area
43,8km²
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 Gradoli : 33 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 98 interactions GloBI sur 4 types (connectance 12.6%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).
Espèces affichées
40
Interactions affichées
98
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).
Species present
204 distinct species · 1 492 observations
Source: GBIF Occurrence snapshot 2026-05-01.
Climate
Mean T°
13,7°C
Annual rain
858mm
Warmest m°
28,8°C
Coldest m°
1,7°C
Elevation: 367 m on average (min 305 m, max 578 m)
Bioclimatic details19 BIO + Köppen full + altitude statsExpert
Annual mean temp.
13,7°C
Annual rain
858mm
Warmest month
28,8°C
Coldest month
1,7°C
Mean alt.
367m
Min
305m
Max
578m
Std. dev.
85m
Köppen-Geiger (dominant)
CsaTemperate, dry summer, hot summer(100 %)Temperate
CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)
Soil & lithology
pH H₂O
6,8
Org. C
34,7g/kg
Clay
28,0%
Sand
30,2%
Silt
41,8%
Average over 0-30 cm. Per-depth details in expert panel.
Dominant lithology: scGLiMaggregated to Viterbo
3 soil depths detailed0-5cm / 5-15cm / 15-30cm × 5 propsExpert
0–5 cm
pH H₂O
6,7
Org. C
62,5g/kg
Clay
27,0%
Sand
30,8%
Silt
42,2%
5–15 cm
pH H₂O
6,8
Org. C
24,9g/kg
Clay
27,0%
Sand
30,7%
Silt
42,3%
15–30 cm
pH H₂O
6,8
Org. C
16,6g/kg
Clay
29,9%
Sand
29,1%
Silt
41,0%
SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)
Land cover
Forest20.6%
Crops9.5%
Built-up0.3%
Bare soil0.5%
Other (grassland, water…)69.1%
Copernicus Global Land Cover 100m (Buchhorn et al. 2020)
Hydrology3 basins · 1 lakes · 0 rivers
Hydrology metrics for this exact territory
Lake surface here
23,05km²
Basins crossed
3
Max drainage
1 325km²
Discharge in basins
0,5m³/s
Mean precip.
699mm/an
Mean T°
14,5°C
Moisture idx
-0,29
Max snow
2%
Mean runoff
316mm/an
Mean elev. (basins)
285m
Watersheds crossing here
Lakes (1, top by area)
Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10
Human pressure
Pop. density
0hab/km²
Night light
0,5nW
Built-up
27,8%
Pesticides
57,4kg/km²
GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)
Protected areas2
IUCN Not Reported · 2
Lago di Bolsena
IUCN Not ReportedSpecial Areas of Conservation (Habitats Directive) · 2016
115 km²
WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN