Ontologia

HydroBASINS lev08 watershed · #7080478030

Bassin de Twentymile Creek

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 across 2 countries : Chautauqua, Erie, Lake Erie

576% lakePfafstetter: 72555716

Sub-basin area

539,5km²

Upstream area

539,7km²

Discharge

5,83m³/s

Mean elev.

249m

Administrative coverage

Hydrographic chain

▼ Drains into

Bassin · #70804779000 km²

▲ Receives from 0 basins

Source / headwater (no upstream basin)

4 dept-equivalent regions (GADM L2)

1 intersecting protected areas

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

Species present

1 232 distinct species · 40 503 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Densité d'observations

40 503 obs · 13 cellules
Obs. / cellule
≥ 16 835
10 925–16 834
4 313–10 924
579–4 312
< 579

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

Ecological tissue

Sample of 39 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 Bassin de Twentymile Creek : 29 espèces reliées par 105 interactions GloBI sur 4 types (connectance 12.8%, filtre Serrano α=0.2). 12 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées
41
Interactions affichées
105
Connectance
0.128
Patrimoniales
0
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°

8,7°C

Annual rain

1 070mm

Moisture idx (CMI)

0,18

Runoff

341mm/an

PET

878mm

AET

730mm

Mean slope

1,1°

Water table

65cm

Forest

39%

Crops

20%

Urban

2%

Protected

0%

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