Ontologia

Division · LKA

Polgahawela

Sri Lanka

AfTropical, rainforest(100 %)

Species observed

161

Observations

532

Area

99,1km²

Ecological tissue

Sample of 35 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 Polgahawela : 31 espèces dont 4 patrimoniales (LR IUCN CR/EN/VU) reliées par 25 interactions GloBI sur 4 types (connectance 4.2%, filtre Serrano α=0.2). 4 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
35
Interactions affichées
25
Connectance
0.042
Patrimoniales
4
Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Species present

161 distinct species · 532 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

532 obs · 3 cellules
Obs. / cellule
≥ 229
229–228
229–228
194–228
< 194

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

Climate

Mean T°

26,2°C

Annual rain

1 977mm

Warmest m°

33,3°C

Coldest m°

21,4°C

Elevation: 115 m on average (min 70 m, max 193 m)

Bioclimatic detailsExpert
Annual mean temp.
26,2°C
Annual rain
1 977mm
Warmest month
33,3°C
Coldest month
21,4°C
Mean alt.
115m
Min
70m
Max
193m
Std. dev.
35m
Köppen-Geiger (dominant)
AfTropical, rainforest(100 %)Tropical

CHELSA BIO 1-19 v2.1 · ETOPO DEM 60s · Köppen-Geiger 1991-2020 (Beck et al. 2018)

Soil & lithology

pH H₂O

5,3

Org. C

35,8g/kg

Clay

37,8%

Sand

34,0%

Silt

28,1%

Average over 0-30 cm. Per-depth details in expert panel.

Dominant lithology: mtGLiM

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,3
Org. C
42,3g/kg
Clay
36,2%
Sand
35,1%
Silt
28,8%
5–15 cm
pH H₂O
5,3
Org. C
35,2g/kg
Clay
37,2%
Sand
34,4%
Silt
28,4%
15–30 cm
pH H₂O
5,4
Org. C
29,8g/kg
Clay
40,1%
Sand
32,5%
Silt
27,3%

SoilGrids 250m (ISRIC, 2017) · GLiM v1.0 (Hartmann & Moosdorf 2012)

Land cover

Forest73.1%
Crops5.5%
Built-up3.1%
Bare soil0.1%
Other (grassland, water…)18.3%

Copernicus Global Land Cover 100m (Buchhorn et al. 2020)

Hydrology2 basins · 0 lakes · 1 rivers

Hydrology metrics for this exact territory

Stream length here

13,9km

Basins crossed

2

Max stream order

4

Max drainage

1 516km²

Discharge in basins

2,8m³/s

Mean precip.

2 286mm/an

Mean T°

26,7°C

Moisture idx

0,30

Mean runoff

919mm/an

Mean elev. (basins)

177m

Watersheds crossing here

Rivers / streams (1, ord ≥ 4)

Live spatial overlap (cached after first hit) · HydroBASINS lev08 × HydroLAKES × HydroRIVERS v10

Human pressure

Pop. density

6hab/km²

Night light

0,5nW

Built-up

306,2%

Pesticides

12,4kg/km²

GHSL POP/Built 2020 · VIIRS lumière nocturne · PEST-CHEMGRIDS 2020 (Maggi et al.)

Protected areas4

IUCN Ib · 3IUCN Not Reported · 1

Dambulla

IUCN Ib

Reserved Forest · 1937

2 km²

Polgolla

IUCN Not Reported

Forest Reserve · 1888

1 km²

WDPA (World Database on Protected Areas) — UNEP-WCMC & IUCN