Ontologia

Commune · BGD

Sylhet Sadar

Bangladesh

CwaTemperate, dry winter, hot summer(100 %)

Species observed

374

Observations

1 134

Area

317,7km²

Ecological tissue

Sample of 37 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 Sylhet Sadar : 29 espèces dont 2 patrimoniales (LR IUCN CR/EN/VU) reliées par 44 interactions GloBI sur 4 types (connectance 6.6%, filtre Serrano α=0.2). 8 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
37
Interactions affichées
44
Connectance
0.066
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

374 distinct species · 1 134 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

1 134 obs · 8 cellules
Obs. / cellule
≥ 374
374–373
173–373
109–172
< 109

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

Climate

Mean T°

24,1°C

Annual rain

5 784mm

Warmest m°

30,5°C

Coldest m°

11,6°C

Elevation: 14 m on average (min 7 m, max 45 m)

Bioclimatic detailsExpert
Annual mean temp.
24,1°C
Annual rain
5 784mm
Warmest month
30,5°C
Coldest month
11,6°C
Mean alt.
14m
Min
7m
Max
45m
Std. dev.
9m
Köppen-Geiger (dominant)
CwaTemperate, dry winter, 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

5,4

Org. C

19,5g/kg

Clay

26,3%

Sand

49,5%

Silt

24,1%

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

Dominant lithology: wbGLiMaggregated to Sylhet

3 soil depths detailedExpert
0–5 cm
pH H₂O
5,4
Org. C
25,1g/kg
Clay
25,5%
Sand
50,2%
Silt
24,2%
5–15 cm
pH H₂O
5,4
Org. C
19,7g/kg
Clay
25,2%
Sand
50,4%
Silt
24,4%
15–30 cm
pH H₂O
5,5
Org. C
13,7g/kg
Clay
28,1%
Sand
48,1%
Silt
23,8%

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

Land cover

Forest21.6%
Crops36.9%
Built-up4.0%
Bare soil1.4%
Other (grassland, water…)36.0%

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

Hydrology3 basins · 7 lakes · 3 rivers

Hydrology metrics for this exact territory

Stream length here

97,5km

Lake surface here

2,33km²

Basins crossed

3

Max stream order

5

Max drainage

3 753km²

Discharge in basins

38,3m³/s

Mean precip.

3 786mm/an

Mean T°

22,8°C

Moisture idx

0,64

Mean runoff

3 542mm/an

Mean elev. (basins)

389m

Watersheds crossing here

Lakes (7, top by area)

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

Human pressure

Pop. density

28hab/km²

Night light

1,9nW

Built-up

400,2%

Pesticides

14,4kg/km²

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

Protected areas3

IUCN Not Reported · 2IUCN IV · 1

Ratargul

IUCN Not Reported

Special Biodiversity Conservation Area · 2015

2 km²

Tilagar

IUCN Not Reported

Eco Park · 2019

0 km²

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

Sub-administrations7