HydroBASINS lev08 watershed · #7080046850

Bassin de Pearl River

A watershed (drainage basin) is not a body of water — it is the land area where rainfall converges towards a single river that eventually reaches the sea (or an endorheic basin). Boundaries follow ridgelines.

Crosses 4 administrative regions : Hancock, Lamar, Pearl River, Saint Tammany

10% lakePfafstetter: 74100400

Sub-basin area

1 370,5km²

Upstream area

1 370,5km²

Discharge

26,63m³/s

Mean elev.

44m

Administrative coverage

4 dept-equivalent regions (GADM L2)

Pearl River
Mississippi · United States
966.0 km²
70.6% of basin
Hancock
Mississippi · United States
235.0 km²
17.2% of basin
Saint Tammany
Louisiana · United States
154.9 km²
11.3% of basin
Lamar
Mississippi · United States
13.2 km²
1.0% of basin

16 intersecting protected areas

Hancock County Marsh Coastal Preserve
IUCN IV
Marine Protected Area
23.28 km² overlap
Bogue Chitto
IUCN IV
National Wildlife Refuge
17.85 km² overlap
Hancock County Marsh
IUCN V
Coastal Reserve
16.49 km² overlap
Mitigation Bank | Mississippi Land Trust
IUCN Not Assigned
Conservation Easement
7.97 km² overlap
Mitigation Bank | Mississippi Land Trust
IUCN Not Assigned
Conservation Easement
5.93 km² overlap
Theodore A. Mars, Jr.
IUCN V
Memorial Wildlife Refuge
3.34 km² overlap
Atlantic Coast Conservancy/Pelican Coast Conservancy Conservation Easement D201511A
IUCN Not Assigned
Conservation Easement
2.47 km² overlap
Nicholson
IUCN V
Private Conservation
0.88 km² overlap
Atlantic Coast Conservancy/Pelican Coast Conservancy Conservation Easement D201649A
IUCN Not Assigned
Conservation Easement
0.59 km² overlap

7 more protected areassorted by overlap area

Crosby Arboretum
IUCN V
Arboretum
0.27 km² overlap
Private
IUCN V
PRIVATE
0.16 km² overlap
Perry
IUCN Not Assigned
Conservation Easement
0.15 km² overlap
Atlantic Coast Conservancy/Pelican Coast Conservancy Conservation Easement E201626A
IUCN Not Assigned
Conservation Easement
0.13 km² overlap
Atlantic Coast Conservancy/Pelican Coast Conservancy Conservation Easement D201650A
IUCN Not Assigned
Conservation Easement
0.10 km² overlap
Mitigation Bank | Mississippi Land Trust
IUCN Not Assigned
Conservation Easement
0.03 km² overlap
Mitigation Bank | Mississippi Land Trust
IUCN Not Assigned
Conservation Easement
0.01 km² overlap

Computed live · GADM 4.1 × HydroBASINS lev08 × WDPA · cached after first hit.

Species present

3 026 distinct species · 138 228 observations

Source: GBIF Occurrence snapshot 2026-05-01.

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

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Bassin de Pearl River : 25 espèces reliées par 79 interactions GloBI sur 3 types (connectance 11.2%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

Connectance

0.112

Patrimoniales

Plus dense que (national)0 %(top 100%)

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

Hydroclimate (BasinATLAS lev08)

Mean T°

19,1°C

Annual rain

1 574mm

Moisture idx (CMI)

0,09

Runoff

625mm/an

PET

1 427mm

AET

1 184mm

Mean slope

0,8°

Water table

45cm

Forest

93%

Crops

Urban

Protected

HydroATLAS BasinATLAS v10 (Linke et al. 2019) · HydroBASINS lev08 (Lehner & Grill 2013)