Woodknowledge Wales

Woodknowledge Wales

Inspiring innovation through collaboration

Afforestation

Experts identify actions needed to mitigate potentially catastrophic threats to UK Forests

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New paper published highlighting key issues that must be addressed if our woodlands are to continue to deliver the range of benefits on which we depend.

A chilly pathway through the forest

Woodknowledge Wales’ Specialist Advisor Wood Science, Dainis Dauksta, and new board member Professor John Healey from Bangor University, joined a team of 42 European experts to carry out a horizon-scanning exercise and identify previously overlooked opportunities and threats faced by UK forests over the next 50 years.

Results were published in, ‘A horizon scan of issues affecting UK forest management within 50 years‘ by Tew et al., whichwas published in Forestry: An International Journal of Forest Research in November 2023 [1]

Dr Eleanor Tew, Head of Forest Planning at Forestry England and visiting researcher at Cambridge’s Department of Zoology emphasised that “The next 50 years will bring huge changes to UK forests: the threats they face, the way that we manage them, and the benefits they deliver to society” [2]

John Healey, Professor of Forest Sciences at Bangor University further explained that “There are many challenges to overcome to ensure that our woodlands not only provide crucial habitat for biodiversity conservation, and environments that are invaluable for human wellbeing, but also continue to produce wood as a vital renewable material that has a key role to play in achieving net zero emissions to meet the challenge of the climate crisis.” [3]

In the new paper, the authors focus on 15 emerging issues from a collated list of 180 that, while previously overlooked, are expected to have significant impact on UK forests over the next half century.

Source: Figure 2 Tew et al, A horizon scan of issues affecting UK forest management within 50 years, Forestry

In their thematic analysis, the authors were able to map all fifteen issues across eleven themes of significance within three main categories: environmental shocks and perturbations, political and socio-economic drivers, and emerging interactions, as shown in Figure 2 above.

The top-ranking issue in the final list when scored individually by the expert panel was ‘Catastrophic forest ecosystem collapse’. A reference to the cascading consequences caused by the interconnected impact of a combination of hazards affecting forest environments, this level of damage to forest ecosystems has already been witnessed in North America and continental Europe. Other threats include competition with society for water, viral diseases, and extreme weather affecting forest management.

While delivering an unequivocal tale of caution and call to action, the final list of 15 issues summarised in the paper’s abstract includes a number of opportunities that are key to mitigating the adverse outcomes of climate change on both the natural world and human societies.

“It was notable that three of the selected 15 issues focused on predicted shifts in future wood product markets and the challenge of ensuring that commercial forest resources do match future value chains. It was important that the Woodknowledge Wales and Bangor University participants in the Expert Panel played a valuable role in advocating for the inclusion of these issues and developing their description in the resulting paper,” said Healey.

Summarising the significance of the expert review as a whole, Professor Bill Sutherland, Senior author and pioneer of horizon scanning at the Department of Zoology, University of Cambridge, noted “We are already seeing dramatic events in Europe’s forests whether fires, disease or bark beetles, whilst the importance of trees is increasingly recognised. Horizon scanning to identify future issues is key, especially as trees planted now will face very different circumstances as they mature in scores of years.”  [2]

This research was funded by Forestry England. The Forestry Commission is bringing the sector together in 2024 to look at next steps.

References

1: Tew et al, A horizon scan of issues affecting UK forest management within 50 years, Forestry DOI: 10.1093/forestry/cpad047

2: University of Cambridge Press release: 8 November 2023, www.cam.ac.uk/research/news, Accessed 13 November 2023

3. University of Bangor Press release, 8 November 2023, www.bangor.ac.uk/news/, Accessed 25 November 2023

Circular wood use for accelerated global decarbonisation

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New research calls for cross-sectoral coordination to maximize net zero benefits of wood recycling

Perhaps not just a pile of old pallets or biomass?

Whilst less than 1% of waste wood goes to landfill in the UK, a new study published in Nature Communications proposes further efficiencies. A team of researchers from Bangor University, the University of Galway in Ireland and Woodknowledge Wales, analysed the whole life cycle of the current timber value chain. They believe collaboration and system change is needed to achieve even longer sequestration of the carbon locked within timber already in use within the supply chain.

The full paper, Circular wood use can accelerate global decarbonisation but requires cross-sectoral coordination [1], was written by Eilidh Forster, John Healey, Gary Newman and David Styles. It was published online by Nature Communications on 25 October 2023 and is open access. The original press release can be read via Bangor University’s news page. [2]

“The UK is currently able to produce only a fraction of the wood it requires yet recovered wood ‘waste’ is an under-valued resource. Improved transparency, reporting and management of recovered wood could create a multitude of circular business opportunities.” Eilidh Forster, lead author and PhD researcher, Bangor University

Enhancing the benefits of timber towards net zero

Wood harvested from sustainably managed forests is an important source of renewable biomaterial and global demand for wood is forecast to increase by up to 170% by 2050. In 2022, UK timber imports cost £11.5 billion.

Carbon captured during tree growth is retained in wood from harvested trees. The manufacture of timber products already tends to minimise greenhouse gas emissions relative to the manufacture of materials such as concrete and steel. Additionally, timber products are excellent carbon stores throughout the full life cycle of those products.

The benefits of timber towards net zero can be enhanced further by applying the principles of the circular economy. By identifying new ways to use, then reuse timber, before reusing that wood again – perhaps in the form of chipboard or wood fibre – there is huge potential to extend the service life of wood. By doing so, that captured atmospheric carbon is stored within that wood. Additionally, reusing wood in this ‘cascading’ manner (a concept introduced and explained in detail in Forster et al’s first paper [3]) brings down the demand for fresh supplies. As a result, there are also increased net carbon sequestration gains from reduced harvesting of virgin wood and reduced transport costs for timber imports.

Biogenic carbon material flow from wood harvest going to Hierarchical or ‘cascading’ use [2, Figure 3]

A circular or cascading wood flow as shown in the reproduced Figure above, delivers multiplied efficiencies in the journey to net zero. The report presents results that indicate a circular approach to recycling medium-density fibreboard (MDF) in the UK alone could deliver ‘75% more cumulative climate-change mitigation by 2050’ when compared with the current, ‘business-as-usual’ single-use approach. In combination with the complementary, if slower, long-term benefits of planting new forests for wood production, the cumulative effects of these two approaches alone could mitigate 258.8 million tonnes of carbon dioxide equivalent (CO2e) emissions. Which equals 61% of the total of net territorial emissions of the UK in the single year of 2021.

“Planting new production forests to meet future wood demand is a very important priority for achieving net zero, however it will take several decades for this benefit to be realised, and we can’t afford to wait that long to reduce the current rate of global warming. Therefore, we also need to act urgently to increase the efficiency with which we reuse current wood products to reduce the pressure that we are placing on global forests to meet our needs.” John Healey, study co-author and Professor of Forest Sciences, Bangor University

System change needed to maximise potential benefits of timber

The new research highlights that, while there are many potential benefits for net zero to be leveraged further, the current UK timber manufacturing system incorporates significant barriers that will first need to be overcome. The aims of the paper were to highlight these barriers and propose solutions that might enable maximum efficiency towards net zero across the timber value chain.

The researchers cite uncertainty of land-use subsidies, poor transparency of material flow through the value chain, and a lack of agreed circularity metrics among other barriers. They also note that low public awareness means the industry isn’t under social pressure and that this, in turn, has enabled conservatism towards change. To resolve these issues, the authors recommend industry collaboration towards cross-sector co-ordination, government intervention on matters such as compulsory deconstruction planning requirements for the built environment, and extended responsibility from manufacturers across the entire life cycle of their products.

“To substantially increase the efficiency of the whole system will require some significant changes in the wood using industries in UK, backed-up by better-targeted government policies, to substantially improve their co-ordination from afforestation to better wood recovery and reuse.” David Styles, study co-author and Associate Professor in Agri-sustainability, University of Galway.

Use, reuse, and reuse again before end-of-life biomass

Currently, a huge proportion of our out-of-service timber products are burnt as biomass to generate heat or electricity. The research team point out that there is opportunity to re-use or recycle these products several times prior to what should be perceived only as a final, end-of-life use as biomass.

Collect, recycle, reuse – striving for a zero-waste economy Source: Circular Economy, Kronospan

There are already several pioneering projects here in Wales that do employ circular thinking to timber reuse with great success. Particleboard manufacturers are increasing their use of recycled wood chips and innovative methods are being used to recover wood fibres from MDF board recovered from residential demolition. Recovered wood fibres can then be used as insulation, locking in the carbon for many more tens of years again within new build homes. If installed with recovery in mind, this same insulation might then be recoverable for further use in the next generation of new builds. This circular thinking can extend the use of the original harvested tree for hundreds more years.

“Moving to a circular economy is difficult but essential if we are to meet both our decarbonisation targets as well as our future resource needs. This paper shows the size of the win and makes practical suggestions for how we might get there. Woodknowledge Wales is an experiment in the kind of cross-sector coordination advocated by this research.” Gary Newman, study co-author and Chief Executive of Woodknowledge Wales.

References

1: Forster, E. J., Healey, J. R., Dymond, C. & Styles, D. , Circular wood use can accelerate global decarbonisation but requires cross-sectoral coordination. Nature Communications, 14:6766, (2023) DOI 10.1038/s41467-023-42499-6

2: Recycling used wood can make a big contribution to net zero but it needs much better coordination, Press Release, https://www.bangor.ac.uk/news/ [Accessed 26 October 2023]

3: Forster, E. J., Healey, J. R., Dymond, C. & Styles, D. Commercial afforestation can deliver effective climate change mitigation under multiple decarbonisation pathways. Nature Communications, 12:3831 (2021) DOI 10.1038/s41467-021-24084-x

Further reading

Investing in Afforestation—Economic aspects of woodland creation for timber production | Briefing Papers

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The decision to invest in an afforestation project with the primary aim of producing timber may involve many personal and environmental factors alongside financial considerations. Adoption of a forestry enterprise within a farming unit represents a change in land use and a long-term investment of land, labour and resources. Financial evaluation provides a structured and objective means to inform the decision and allows comparison of afforestation with other economic uses of land.
Afforestation projects can take a number of forms, from planting steep areas or wet corners of a farm to integrating timber trees with agricultural production or establishing plantation woodlands. Some afforestation projects such as commercial plantation woodlands have the potential to produce quality timber products alongside diversifying farm incomes and providing other environmental benefits such as carbon sequestration and flood risk mitigation.
This series of guidance notes provides practical information for farmers and other landowners interested in investing in forestry. It is designed to help develop a first understanding of economic evaluation of afforestation projects. The six guidance notes of the series introduce the basic steps involved in the assessment of such projects to allow some preliminary due diligence when considering an investment in forestry. This does not replace a full assessment and advice by a chartered forest manager.
BRIEFING PAPERS →

More and Better Home-Grown Timber—The financial case for existing landowners to plant woodland

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From the TV presenters of Countryfile to the ever-escalating claims of political parties in the last UK elections, it seems everyone wants to plant more trees. Reasons vary from carbon capture, amenity, and biodiversity to production of usable timber, as do levels of ambition.
Amongst the most widely quoted targets, The Committee on Climate Change (CCC) say that UK needs 30K Ha of new woodland a year to 2050 as part of a suite of land use changes to meet the UKs commitment to become Zero Carbon. This afforestation is predicted to account for the largest share of the forecast £39 Bn cost, the majority of that being spent on land acquisition. This presumes that either we expand the public estate or encourage land acquisition by external investors.
Experience from solar and wind farms suggests that this will be expensive, slow, and unpopular with some existing landowners, particularly farmers. Nonetheless there is considerable pressure on farmers from Brexit and existing financial challenges particularly of upland farming are severe in Wales.
Based upon the above, our approach is to solve two problems together. Woodland creation for a range of benefits, providing the means for farm transformation, while avoiding the expense and social disruption of land acquisition.
Promising lower costs of delivered woodland and a wide range of associated benefits, the approach has much to recommend it, subject to its financial viability.
This report reviews opportunities and challenges through the lens of financial viability.
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