Biodiversity Assessment - Pilbara

Riparian Zones

Table: Riparian Zones: their average condition, trend and threatening processes for each subregion.
Reliability assessment	Condition	Trend	Threatening processes	Threatening processes notes
Chichester (PIL1)
Qualitative	Degraded (Recovery unlikely in medium term)	Declining	Exotic weeds	Buffel grass, Parkinsonia, Mesquite, Mexican Poppy.
			Feral animals	Cattle, donkey, camel, horse.
			Grazing pressure	Grazing and trampling by cattle, donkey, camel, horse.
Fortescue (PIL2)
Qualitative	Fair (Recovery requires significant intervention)	Declining	Exotic weeds	Buffel grass, Parkinsonia, Mesquite, date palm, cotton palm, Indian water fern, water lilies.
			Feral animals	Donkey.
			Grazing pressure	Cattle, horse.
Hamersley (PIL3)
Qualitative	Fair (Recovery requires significant intervention)	Declining	Changed hydrology - other	Mine de-watering. Input to systems and drawdown around systems.
			Exotic weeds	Buffel grass, date palm, Indian water fern ? Ceratopteris, ruby dock.
			Feral animals	Donkey, horse.
			Grazing pressure	Cattle, horse.
Roebourne (PIL4)
Qualitative	Fair (Recovery requires significant intervention)	Declining	Changed fire regimes	No data
			Exotic weeds	Buffel grass, Parkinsonia, Mesquite.
			Feral animals	Cattle, sheep, horses, foxes, cats, rabbits, goats.
			Firewood collection	No data
			Grazing pressure	No data

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