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The mid-way findings of a 20-year study into moorland management - measuring carbon storage, water tables and species biodiversity on burnt, mown and unmanaged areas - have been published.
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Researchers working on a landmark 20-year study into the effects of various moorland management practices have published the half-way findings, concluding there is no “one size fits all” approach to moorland management.
The study, Protecting our Peatlands, found that although there was a small initial benefit in terms of carbon capture when heather is allowed to grow unmanaged, it causes the peat to dry out over time, and also provides a fuel load which increases the risk of wildfires. Wildfires themselves cause potentially catastrophic carbon loss as well as damage to the peat.
Researchers at York University recently published the 10-year findings with a note in the abstract explaining that: “Although Peatland-ES-UK has already continued for longer than nearly all other moorland research, it is important that the work covers at least the length of a complete management cycle. To produce results that are robust and long-term enough to guide moorland management policy, we plan to continue the project for another decade.”
The mid-way findings highlight the folly of knee-jerk reactions made by local governments, based either on short-term studies or the increasing pressure from activist groups. Researchers stated that: “Both burning and mowing release considerable amounts of carbon during [...] the first years after management, but this is counteracted by increased absorption later on… Heather management also seems to increase biodiversity and maintain higher water tables in the longer term, compared to areas of unmanaged heather.”
Comparing these findings to an earlier five-year study by researchers at the University of Leeds again highlights the need for longer term studies. Effects of Moorland Burning on the Ecohydrology of River Basins found that "water tables were [...] significantly deeper for burned catchments thank for unburned ones". If this study had run over a longer period, as Protecting our Peatlands did, they would have found that the water tables in unmanaged areas dropped steadily over time, and that "seven to nine years after management, the uncut areas are the driest with water tables around 13 cm below the peat surface, whereas both the mown and burnt areas have water tables around 11 cm underground".
It is suggested that this could be due to the fact that in uncut/unburnt areas, the heather gradually gets larger, resulting in more plant matter above ground which must be supplied with water by its roots below ground; "Most of this water is lost to the air from pores in the leaves in a process called evapotranspiration".
If the goal of moorland management policy is to protect peatlands and maximise carbon storage in the long-term, then it must be based on findings from studies that measure the long-term positive/negative effects of the various practices – including, as in this study, the effects on peatland of burning, mowing, and of leaving land unmanaged.
Amanda Anderson, Director of the Moorland Association, said: “This valuable report shows there is no simple solution to the management of peatland. This report provides compelling evidence for decision-makers to embrace all land management tools to find the sweet-spot of positive outcomes from our varied peatlands. There is no ‘one size fits all.’
“The debate around protecting and preserving peatland has long been too polarised and this report demonstrates that it is not in the best interests of conservation to demonise particular techniques. The time has come to apply this new knowledge to the previous blanket bog land management guidance from government and ensure it is fit for the purpose of restoring, enhancing and maintaining actively functioning blanket bog.”
Read the published study here
Wildfowlers are used to making the most of the conditions, and when it comes to conservation, Kent Wildfowling and Conservation Association has the same approach.
If bird flu taught us anything this year, it’s that our industry is too dependent on overseas birds. Tim Weston looks at the ways some game shoots are future-proofing their sport by becoming more self-sufficient.
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