This is a really important insight by @andyheald on how restocking figures can give a clearer idea of how our woodlands are really expanding and changing. Let me try to visualise and explain it... 1/
🌲 It's rare for broadleaf to be felled and restocked, so restocking can be assumed to be on former conifer.
🌲 Much conifer restocking isn't grant-funded, so its statistics aren't reliable, but replacing it with broadleaf often is. 2/
So 'broadleaf restocking' represents broadleaf woodland creation, over and above what's in the 'new woodland' statistics, but on former conifer instead of former open land. 3/
🌳We can add broadleaf restock to new woodland to get total increase in broadleaf area,
🌲And subtract broadleaf restock from new conifer planting to get net increase (or decrease) in conifer area. 4/
So we can see:
🌳In England and Wales, broadleaf woodland increased significantly more than the 'new woodland' statistics tell you;
🌲While conifer area decreased by just over 1000 hectares. 5/
In Scotland, both types of woodland expanded, but broadleaf accounted for over half (54%) of net expansion, not the 35% often quoted.
Across the UK as a whole, conifers (usually for wood production🏗️) only accounted for 30% of net expansion, the vast majority was broadleaf (usually for wildlife/amenity🐾). 7/
Why are broadleaves replacing conifers? Good reasons!
🌳Restoring Plantations on Ancient Woodland - where conifers historically replaced broadleaves,
🌳Restructuring - diversifying old conifer plantations with native trees at harvest, to enhance the whole forest for wildlife.
Why is it concerning?
Later in Forestry Statistics we read that the UK remains the second biggest net importer of wood products in the world, after China, and imports 80% of the wood products we need. Yet England and Wales are reducing their timber producting capacity. /9
We also read in Forestry Statistics that carbon sequestration by the UK's forests is projected to fall.
We are not planting as many conifers - which capture carbon faster and produce the timber we need - as we might have thought - and as we need. /10
Conclusion: It's vital we delve beyond headlines to understand how our forests are changing. Native broadleaves are replacing conifers for good reason, but it's vital they're compensated, by prioritising new conifers on suitable ground, for timber, carbon, and farm income. 11/11
A new series of four expert factsheets from @Forest_Research gets into the nuance below the headlines, and sorts the facts from the myths on this important and too frequently politicised topic: [Thread]
1. How does tree planting affect climate?
How much of a tree is carbon?
What role does timber play?
What is the effect of forests on carbon in soil?
What is the role of complex effects like albedo, VOCs and evapotranspiration? forestresearch.gov.uk/research/facts…
2. How can forestry help flooding in a changing climate?
What are the roles of evaporation, absorption, ‘leaky dams’?
How do you think at catchment-scale?
What are the limitations? forestresearch.gov.uk/research/facts…
The biggest carbon benefit of a new* forest comes from its large-scale production of low-carbon, recyclable resource. That's why UK #NetZero must be rooted in:
UKFS** designed
UKWAS*** certified
high-yielding****
new forests. confor.org.uk/media/247533/e… #ReforestationConference
* We aren’t talking ancient woodland here, which covers around 2.5% of the UK. If anyone is talking to you about woodland establishment and showing photos of ancient woodland, ask questions.
** UKFS, the UK Forestry Standard, regulates all government-supported woodland creation in the UK. It protects important habitats and deep peat from planting, ensures diverse forest design, and requires water, soil, landscape and heritage protection. gov.uk/government/pub…
The "landuse sector" have spent the 2010s tussling over carbon figures. But by far the biggest cause of climate change is still old-fashioned oil, coal and gas. [Mini thread]
It's imperative that in the 2020s, farmers, environmentalists, foresters and other rural businesses work together to keep the fossils in the ground. And we mustn't underestimate the tricks big fossil will play to ensure we collude in getting it out.
I hope my regular readers will know not cynical about oil because I'm a cynical person, or because I'm cynical about business, but because of overwhelming evidence that they're too deeply enmired in climate change to escape (although many individuals will)
I try to avoid the news (because I think too much), but the #ClimateEmergency#COP25 headlines yesterday gave me my first proper climate anxiety for years.
I escaped apocalyptic anxiety because I found hope, a very down-to-earth practical hope. We can decarbonise the atmosphere, and decarbonise our economy, by growing trees. Yep commercial trees.
Commercial trees are specially-bred to soak carbon from the air at super-speeds, store it in wood products, and drive the four horsemen of the climate apocalypse from our lives: cement, iron, oil, illegal logging. bbc.co.uk/news/world-eur…
The important UK #StateOfNature report has just been launched. Here’s my woodlandy take on this vital snapshot of the life from which we all live. [Thread] nbn.org.uk/stateofnature2…
The gloomy headline is that abundance of 700 indicator species has declined 13% since 1970, with indications that the decline of nature may be accelerating. But I’m more interested in the detail, because that’s where we can change the trends. #StateOfNature
After agricultural intensification, #StateOfNature reveals that climate change is the biggest threat. While changes may initially be seen in distribution rather than decline of species, it is imperative that we tackle what is an unfolding and irreversible disaster for ecosystems.
If you’re interested in low-carbon landscapes and green cities, I can’t recommend enough getting a coffee and watching this lecture by Elaine Oneil and George Berghorn in the @MSU_Forestry Forest Carbon and Climate programme. canr.msu.edu/news/fcwg-2018… [Thread]
After 20 years of management, conifers will have sequestered around 40t C/ha, but unmanaged natural regeneration less than 5. After 25 years managed conifers will have sequestered 80t/ha and natural regeneration less than 10.
The best option for carbon capture in the forest is to manage it but not harvest it: the top black line is managed but not harvested; the gold line is natural regeneration.