Ontologia

Commune · IND

Nagappattinam

India

AwTropical, savannah(100 %)

Species observed

241

Observations

4 025

Area

529,2km²

Ecological tissue

Sample of 25 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 Nagappattinam : 18 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 36 interactions GloBI sur 4 types (connectance 12.0%, filtre Serrano α=0.2). 7 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
25
Interactions affichées
36
Connectance
0.120
Patrimoniales
2
Plus dense que (national)0 %(top 100%)

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

Species present

241 distinct species · 4 025 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

4 025 obs · 13 cellules
Obs. / cellule
≥ 1 224
705–1 223
561–704
83–560
< 83

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

Climate

Mean T°

28,0°C

Annual rain

1 393mm

Warmest m°

32,8°C

Coldest m°

23,5°C

Elevation: 4 m on average (min -6 m, max 10 m)

Bioclimatic detailsExpert
Annual mean temp.
28,0°C
Annual rain
1 393mm
Warmest month
32,8°C
Coldest month
23,5°C
Mean alt.
4m
Min
-6m
Max
10m
Std. dev.
3m
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

6,7

Org. C

37,6g/kg

Clay

33,1%

Sand

33,0%

Silt

34,0%

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

Dominant lithology: suGLiMaggregated to Nagappattinam

3 soil depths detailedExpert
0–5 cm
pH H₂O
6,7
Org. C
49,1g/kg
Clay
31,6%
Sand
34,2%
Silt
34,2%
5–15 cm
pH H₂O
6,7
Org. C
32,3g/kg
Clay
32,3%
Sand
33,3%
Silt
34,4%
15–30 cm
pH H₂O
6,7
Org. C
31,4g/kg
Clay
35,3%
Sand
31,3%
Silt
33,4%

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

Land cover

Forest6.5%
Crops68.2%
Built-up1.6%
Bare soil2.0%
Other (grassland, water…)21.6%

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

Hydrology3 basins · 4 lakes · 8 rivers

Hydrology metrics for this exact territory

Stream length here

44,4km

Lake surface here

3,99km²

Basins crossed

3

Max stream order

3

Max drainage

1 856km²

Discharge in basins

2,4m³/s

Mean precip.

1 182mm/an

Mean T°

28,6°C

Moisture idx

-0,26

Mean runoff

412mm/an

Mean elev. (basins)

15m

Watersheds crossing here

Lakes (4, top by area)

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

Human pressure

Pop. density

6hab/km²

Night light

1,4nW

Built-up

161,8%

Pesticides

4,2kg/km²

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