Ontologia

District · lka

Mannar

Sri Lanka

AwTropical, savannah(100 %)

Species observed

747

Observations

81 367

Area

2 017,8km²

Ecological tissue

Sample of 24 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 Mannar : 18 espèces dont 1 patrimoniale (LR IUCN CR/EN/VU) reliées par 38 interactions GloBI sur 3 types (connectance 13.8%, filtre Serrano α=0.2). 6 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
24
Interactions affichées
38
Connectance
0.138
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

747 distinct species · 81 367 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

81 367 obs · 39 cellules
Obs. / cellule
≥ 22 039
11 233–22 038
303–11 232
111–302
< 111

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

Climate

Mean T°

27,6°C

Annual rain

1 152mm

Warmest m°

32,0°C

Coldest m°

22,5°C

Elevation: 27 m on average (min -25 m, max 89 m)

Bioclimatic detailsExpert
Annual mean temp.
27,6°C
Annual rain
1 152mm
Warmest month
32,0°C
Coldest month
22,5°C
Mean alt.
27m
Min
-25m
Max
89m
Std. dev.
21m
Köppen-Geiger (dominant)
AwTropical, savannah(100 %)Tropical

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

Soil & lithology

pH H₂O

6,0

Org. C

45,4g/kg

Clay

32,2%

Sand

39,8%

Silt

28,0%

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

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,9
Org. C
57,2g/kg
Clay
31,3%
Sand
40,5%
Silt
28,2%
5–15 cm
pH H₂O
5,9
Org. C
41,6g/kg
Clay
31,6%
Sand
40,4%
Silt
28,0%
15–30 cm
pH H₂O
6,0
Org. C
37,6g/kg
Clay
33,7%
Sand
38,4%
Silt
27,8%

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

Land cover

Forest60.0%
Crops21.6%
Built-up0.3%
Bare soil1.4%
Other (grassland, water…)16.6%

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

Hydrology6 basins · 12 lakes · 5 rivers

Hydrology metrics for this exact territory

Stream length here

120,0km

Lake surface here

19,60km²

Basins crossed

6

Max stream order

4

Max drainage

3 345km²

Discharge in basins

29,4m³/s

Mean precip.

1 241mm/an

Mean T°

27,6°C

Moisture idx

-0,13

Mean runoff

315mm/an

Mean elev. (basins)

39m

Watersheds crossing here

Lakes (12, top by area)

3 more lakes

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

Human pressure

Pop. density

0hab/km²

Night light

0,1nW

Built-up

34,1%

Pesticides

10,2kg/km²

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

Protected areas22

IUCN Ib · 16IUCN IV · 4IUCN II · 2🌊 Marine · 5📍 Point sites · 1

Wilpattu

IUCN II

National Park · 1938

1 313 km²

Maduroad

IUCN Ib

Reserved Forest · 2012

519 km²

Thunukkai

IUCN Ib

Reserved Forest · 2012

254 km²

Complete list

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

Sub-administrations5