Indicator: BD-18 Area revegetated with woody vegetation
Data
| 1977 | 1980 | 1985 | 1988 | 1989 | 1991 | 1992 | 1995 | 1998 | 2000 | 2002 | 2004 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ACT | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| NSW | 482.3 | 247.1 | 417.2 | 285.8 | 199.9 | 181.6 | 197.8 | 342.7 | 232.5 | 140.1 | 158.3 | 220.7 |
| NT | 7.7 | 3.7 | 7.7 | 3.9 | 3.3 | 4.7 | 4.6 | 7.6 | 10.4 | 7.9 | 9.0 | 11.9 |
| QLD | 886.3 | 290.4 | 704.5 | 415.9 | 319.0 | 314.7 | 275.3 | 357.6 | 338.9 | 201.0 | 284.0 | 259.1 |
| SA | 78.1 | 27.7 | 50.3 | 26.4 | 29.0 | 19.3 | 18.9 | 44.9 | 33.0 | 19.1 | 32.1 | 32.8 |
| TAS | 9.2 | 2.8 | 34.7 | 13.7 | 8.9 | 14.1 | 16.6 | 19.6 | 17.4 | 14.3 | 26.3 | 26.5 |
| VIC | 82.3 | 27.7 | 69.2 | 37.8 | 36.7 | 42.0 | 38.4 | 46.2 | 34.6 | 32.5 | 68.2 | 71.0 |
| WA | 133.1 | 50.9 | 103.3 | 79.5 | 77.7 | 43.0 | 34.3 | 67.1 | 79.1 | 86.4 | 94.6 | 63.8 |
| Total | 1,680.9 | 652.3 | 1,389.0 | 865.0 | 676.6 | 621.4 | 587.9 | 887.7 | 747.9 | 503.2 | 674.4 | 687.6 |
Source: ERIN (Unpublished Data) 2002, SoE/ERIN remote sensing project, Contact:Elizabeth.McDonald@deh.gov.au.
Total regrowth in Australia (‘000 hectares), 1977-2004
Source: ERIN (Unpublished Data) 2002, SoE/ERIN remote sensing project, Contact:Elizabeth.McDonald@deh.gov.au.
Total regrowth in Australia (‘000 hectares), 1977-2004
Source: ERIN (Unpublished Data) 2002, SoE/ERIN remote sensing project, Contact:Elizabeth.McDonald@deh.gov.au.
Extent of regrowth of woody vegetation as a percentage of the initial (1980) area of woody vegetation
Extent of regrowth of woody vegetation as a proportion of IBRAs
Nature of major revegetation activity in South Australia - 1999-2001
| Reason for planting | Area planted ('000 ha) | |||||||
|---|---|---|---|---|---|---|---|---|
| Before 1995–96 | 1995–96 | 1996–97 | 1997–98 | 1998–99 | 1999–00 | 2000–01 | ||
| Revegetation on private farms (non-forestry purposes) | 10 | 4 | 17 | 20 | 16 | 48 | 43 | |
| Private forestry | Timber or pulp production: hardwoods | 5 | 1 | 1 | nd | nd | 3 | 2 |
| Farm forestry | >1 | >1 | >1 | 1 | 1 | 1 | > 1 | |
| 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | ||
| Public forestry (State Forests of NSW) | Timber or pulp production: hardwoods | 0.9 | 2.8 | 4.3 | 7.8 | 5.5 | 3.4 | 3.2 |
| Timber or pulp production: softwoods | 4.7 | 6 | 6 | 5.6 | 4.9 | 3.9 | 4.2 | |
Source: Department of Environment and Conservation (NSW) 2003, State of the Environment, Chapter 6 Biodiversity Table 6.2, Department of Environment and Conservation, Sydney, viewed 13 Oct 2005, http://www.epa.nsw.gov.au/soe/soe2003/chapter6/chp_6.2.htm.
What the data mean
Revegetation programs/regrowth have remained fairly constant across the nation over the last 30 years except in 1977 and 1985, when regrowth was significantly higher. Revegetation has not kept pace with land clearing. See Indicator Change in area and proportion of woody native vegetation . The greatest regrowth has occurred in Queensland but this has not offset clearing - the extent of woody vegetation has decreased in that State by about 5 million hectares since 1972. See indicator The proportion and area of native vegetation and changes over time .
Data Limitations
Some regrowth may bear little resemblance to the communities that were previously cleared, eg dense woody shrubs may form a monoculture.
Data derived from ERIN analysis do not distinguish between natural regrowth and revegetation programs
Woody vegetation is defined as vegetation with at least 20% canopy cover and 2 metres tall
The woody non-woody data is 'AGO Version July 2005'. This data was provided to ERIN by the AGO and was the best available information at the time. All subsequent analysis by ERIN assumes data are correct as received from the supplier. This is an 'Indicative Analysis Only' with a focus on monitoring trends through time and the comparison of the results between the IBRA regions. For this reason all results to have been rounded to the nearest 100 ha.
Issues for which this is an indicator and why
Inland Waters — Catchment scale influences - Influence of climate variability and change
None
Other indicators for this issue:
- A-01 Annual variation in the Southern Oscillation Index
- A-02 Rainfall trends - annual mean rainfall
- A-04 Temperature trends - annual mean temperature anomalies
- A-05 Temperature extremes - percentage area of extreme annual mean temperatures
- A-36 Rainfall extremes - percentage area experiencing extreme wet and dry conditions
- A-37 Temperature trends - spatial trend in mean annual temperatures
- A-41 Greenhouse - climate change projections
- A-47 Rainfall deficiencies - drought
- LD-05 Terrestrial carbon loss rate and rate of land carbon sequestration
- LD-24 Severe drought and wildfire correlation
- BD-11 Area burnt by frequency, intensity and season of burning
- BD-15 Examples of impacts of climate variability on selected species, habitats or ecosystems
- AAT-12 Changes in colonies of plants on Heard Island
- AAT-14 Ice sheet mass balance and sea ice extent
- AAT-15 Glacier movement
Key
Links to another web site
Links to data in the DRS
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