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Victorian Resources Online

Ecosystem Decline

Soil erosion | Soil degradation | Ecosystem decline

Ecosystem decline can include catchment salinity, vegetation decline, weed proliferation, invasion of pest animals and stream decline.

Examples of ecosystem decline - Catchment salinity
Farm dams and surrounding woody vegetation damaged by the accumulation of salt in this low part of the landscape

Catchment salinity

Catchment salinity is where changes in the water balance of a catchment mobilises salt stores and concentrates the salts in low lying parts of the catchment. This concentration results in damage to vegetative cover and surface waters.

An illustration is given on the Soil and landscape assessment in the upper Bet Bet Creek catchment page.

Further information is available at the salinity management page.
Examples of ecosystem decline - Vegetation decline
Dying old silver wattles not being replace by new woody species

Vegetation decline

Vegetation decline describes both the loss of mass and diversity of vegetation in the landscape. It also covers any increase in weediness of the vegetative structure.

Examples of ecosystem decline - Weed proliferation
The weed “wandering jew” dominating the understory in a conservation reserve

Weed proliferation

Weed proliferation is the excess growth of undesirable plants such that intervention is required to reduce harm to the environment, the economy, human health or amenity.

Further information is available in the
Invasive Plants section.
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