Criteria 3: Vital Habitat

Criteria 3: Vital Habitat

What does this map show?

Number/area permanent/perennial dry season refugia (P)

Hydrosystem areas that are permanent/perennial provide important dry season refugia for many species of flora and fauna in northern Australia (Pusey & Kennard, 2009). This attribute was calculated as the length of perennial streams/rivers (riverine) or area of permanent lacustrine or palustrine areas in each planning unit. See Chapter 4 for more details.

Degree of natural longitudinal connectivity (con)

Natural longitudinal connectivity facilitates movement of biota and materials along river networks and is critical to long-term persistence of biodiversity and ecosystem processes.  This attribute was calculated as the proportional stream length within each planning unit that was unnaffected by artificial barriers (dams, reservoirs and large weirs) downstream, within or upstream of each planning unit.  Artificial barriers data was sourced from AusHydro version 1.1.6, (Geoscience Australia and the Fenner School of Environment and Society, ANU. unpublished) and Dams and Water Storages 1990 data (Geoscience Australia, 2004).

Number of migratory bird species (Mbird_S)

Planning units containing vital habit for international migratory waterbirds may be considered to be of high conservation value.  This attribute was calculated simply as the number of migratory waterbird species recorded from a planning unit.  Migratory waterbirds species were sourced from the national list of migratory species. (

Sample map: 3: Vital Habitat

3: Vital Habitat