ILWS - Charles Sturt University
ILWS - Charles Sturt University

Woody Regrowth in Rural Landscapes

Led by A/Prof Ian Lunt

The information on these pages is accurate to the end of 2016 when reporting for SRA was completed for the 2015-16 Biennial Report.  All reporting for our projects is now found in relevant areas under the four research themes.

  • About
  • Issues
  • Members
  • Outcomes
  • Projects
  • Publications
  • Engagement
  • Postgrad Research

About

The aim of this SRA was to enhance environmental sustainability in regional Australia, by improving our ability to manage natural regeneration and regrowth for a broad range of social and environmental values.

regenerationThe SRA group tackled an emerging issue of increasing importance for sustainability, land use planning and biodiversity conservation in eastern Australia and elsewhere. Its research findings are providing a sound knowledge base for improved management of regenerating rural landscapes in Australia and elsewhere.
The program:

  • Explored changing social discourses and evolving community attitudes to woody plant regeneration in agricultural landscapes
  • Identified the impacts of woody plant regeneration on a range of valued ecosystem services (and disservices) including biodiversity conservation, soil health, carbon sequestration and fire hazards.
  • Developed practical techniques for managing woody regrowth to enhance biodiversity values and other ecosystem services.
  • Assisted policy development and management of biodiversity in regenerating agricultural landscapes

The SRA group included staff with a wide array of social and ecological expertise and substantial track records in sustainable land use and conservation management in Australia.
They had expertise in:

  • vegetation and fauna ecology
  • ecosystem dynamics
  • conservation management and restoration ecology
  • population biology
  • disturbance and road ecology and management
  • adaptive management
  • social learning
  • landholder perceptions and land management decision making
  • GIS and remote sensing
  • spatial science for environmental modelling

Most of the group's field research was conducted by its PhD students and Honours students. 2014  was a major year of consolidation and extension with two PhDs submitting and passing their PhDs. The completed projects provided a solid grounding for future work, with major advances in our understanding of the ecological and social aspects of woody regrowth in central Victoria.

Research projects conducted in a number of regions, from southern Victoria to south-central NSW.

Current research projects covered an array of social and ecological issues, including:

  • where does regrowth occur, how does it change over time
  • how does regrowth affect plants, animals and soils
  • paradoxes of native vegetation management in south east Australia in the early 21st century
  • role of legacy trees and soil microbes in the process of natural regeneration

Issues

Many regions in South East Australia are undergoing rapid demographic and land-use changes, such as reduced agricultural production and expansion of 'lifestyle' properties.

In some regions these changes have promoted regeneration of native woody plants across large areas. Such passive (or unassisted) regeneration is expected to become more widespread in the future. This process is a major issue globally and is expected to be promoted as climate change progresses.

Regrowth of native trees and shrubs has triggered a diversity of responses from different sectors of the community, from 'woody weeds' to 'valuable regeneration'. However the diversity of community attitudes to regrowth is poorly understood. Similarly, little research is available on the effects that regrowth has on biodiversity, ecosystem process and ecosystem services.

Despite its widespread occurrence, regenerating vegetation is not well recognised by many current policies on land use and vegetation retention.  Woody regrowth often slips through the cracks between agricultural studies of 'woody weeds' and ecological and social studies of 'natural ecosystems'

Members

Members Expertise
A/Prof Ian Lunt Ecosystem dynamics; conservation management and restoration ecology
Dr Catherine Allan Adaptive management; social learning
Dr John Morgan
(LaTrobe University)
Plant ecology; population biology and disturbance ecology
 A/Prof Peter Spooner Landscape ecology; disturbance ecology, road ecology and management
Dr Rik Thwaites Landholder perceptions and land management decision making
Dr Rachel Whitsed GIS, Spatial science for environmental modeling
Dr Alison Matthews Wildlife ecology, impacts of climate change on wildlife

Outcomes

2014 was a major year of consolidation and extension with two PhD and an Honours projects completed.

Key outcomes from these projects were:

  • The knowledge gained from research on understanding bird responses in regenerating landscapes has added to our knowledge on how the landscape vegetation mosaic changes over time with a shift in land use patterns. This will help conserve woodland bird species by understanding the dynamics of regrowth patches as potential complimentary habitats to public reserves and ecological plantings on farms
  • The research on how shrubby regrowth on private land is being viewed and managed has provided understandings from a social science perspective that can be used to inform culturally appropriate interventions for better biodiversity outcomes.
  • The pioneering inter-disciplinary study which included ecological mapping and social surveys has documented land-use changes in the southern Strathbogie Ranges region in central Victoria. This project has expand the geographical range of projects conducted in this SRA and enabled patterns and responses to be compared across catchments

Expected outcomes from research projects still underway include:

  • The project on the dynamics of south-eastern Australian woodlands has contributed  important theoretical insight into the construction and maintenance of woodland ecosystems world-wide. The results will also assist land managers in making informed decisions regarding the use of disturbance-based management in woodland ecosystems.
  • The research on legacy trees and soil microbes will advance our understanding of the role that communities of microbes play in the process of natural regeneration, and establish whether old growth trees serve an important function in the preservation and recovery of these microbial communities. Ideally, this understanding would allow us to help restore the functional diversity to recovering ecosystems. These findings may also support the implementation of new forest husbandry techniques to help facilitate and expedite restoration efforts.
  • The research on the paradoxes of native vegetation management aims to support regional communities and government agencies involved in land management. It is anticipated that the findings will contribute to a greater awareness of the consequences linked to the paradoxical nature of contemporary vegetation management and policy, including the role public narratives have in policy development and its implementation, particularly after major crises such as bushfires. This has relevance for policy makers, managers and community in efforts to enhance the development of sustainable vegetation management and fire protection policies.

Projects

Publications

2014 

Zeeman, B.J., Lunt, I.D., & Morgan, J.W. (2014). Can severe drought reverse woody plant encroachment in a temperate Australian woodland? Journal of Vegetation Science, 25(4), 928-936.

Smallbone, L., Matthews, A., & Lunt, I.D. (2014). Regrowth provides complementary habitat for woodland birds of conservation concern in a regenerating agricultural landscape. Landscape and Urban Planning, 124, 43-52.

Coulson, C.,Spooner, P.G., Lunt, I.D., & Watson, S.J. (2014). From the matrix to roadsides and beyond: the role of isolated paddock trees as dispersal points for invasion. Diversity and Distributions, 20(2), 137-148.

 Whitsed, R., & Smallbone, L. (2014). Uncertainty in a cellular automata model for vegetation change. Journal of Spatial Science, 1-16.

Geddes, L.S., Lunt, I.D., Smallbone, L. & Morgan, J.W. (2011). Old field colonization by native trees and shrubs following land use change: could this be Victoria's largest example of landscape recovery? Ecological Management and Restoration 12(1), 31-36.

Lunt, I.D., Winsemius, L.M., McDonald, S.P., Morgan, J.W. & Dehaan, R.L. (2010). How widespread is woody plant encroachment in temperate Australia? Changes in woody vegetation cover in lowland woodland and coastal ecosystems in Victoria from 1989 to 2005. Journal of Biogeography 37, 722-732.

Lunt , I. D., Allan, C., Spooner , P., Thwaites, R., & Morgan, J. (2010) Managing regrowth in Australia's changing rural landscape: a social phenomenon. Australasian Plant Conservation 19(1), 5-6.

Engagement

CassiniaA seminar and workshop showcasing completed and current research was held in Benalla on April 21, 2015. Around 35 people attended, coming from local Catchment Management Authorities, government departments, non government nature organisations and individual landholdings. Ian's introduction to the issue was followed by seven brief presentations, summarised below:

Understanding bird responses in regenerating agricultural landscapes, Dr Lisa Smallbone. Demonstrated that regrowth is valuable habitat, complementary to forest reserve. Modelling suggests tree cover to be dominant feature by 2046.

How does land-use affect soil microbes? Joey Walters-Nevet
This will indicate how ecosystems are recovering below ground, and determine whether legacy trees provide protection to fungi and bacteria.

What can we learn about woodland dynamics from dense tree regeneration? Erika Cross.
Dense regeneration provides a unique opportunity to understand the dynamics of open vegetation types!

Thinning dense eucalypt stands Dr Chris Jones and Dr Libby Rumpff
(Melbourne University). Thinning increases understorey richness and cover, both exotics and natives. Thinning can restore benchmark levels in short term, but not all sites respond (topsoil/seedbank, grazing).

Social and ecological changes in the southern Strathbogie Ranges, Candice Dent (A/Prof Lunt presented).
Farmers and amenity landholders both saw the landscape as a production, agricultural landscape,not 'bushland'. Some revegetation occurring, but vegetation was infrequently discussed.

The "home-grown terror" within your beloved forest. Samantha Strong.
Contradictory myths of war, hell, risk and control frame an overarching complexity; contributes to policy 'reality'.

Perceptions of shrubby regrowth in Central Victoria, Dr Fleur Stelling (Dr Allan presented). Reframe regrowth, engage wide range of stakeholders, appeal to landscape preferences, cultural preferences and the bird narrative; that is establish new social norms – regrowth stewardship.

Following the presentations researchers joined with the other participants in three concurrent workshops that considered policy, organisation and on ground responses to the material presented. Each group developed ideas for changed perception and management of woody regrowth in Victoria.

A/Prof Lunt writes the very popular ecology blog, Ecology for Australia

Dr Lisa Smallbone gave a presentation on 'Opportunities for ecosystem recovery in regenerating landscapes: a case study from an Australian temperate multi-function landscape' at the
international ecology conference INTECOL, London, August 2013 at its Biodiversity, Ecosystems Services and Multifunction symposium.