Assessment of peatland burning in Scotland during 1985-2022 using Landsat imagery
Assessment of peatland burning in Scotland during 1985-2022 using Landsat imagery
复制标题
使用 Landsat 图像评估 1985 年至 2022 年苏格兰泥炭地燃烧情况
DOI：
10.1002/2688-8319.12296
复制
发表时间：
2023
影响因子：
2.9
通讯作者：
Spracklen B
中科院分区：
文献类型：
--
作者：
Spracklen B
在苏格兰高地，人们普遍实行对高沼地植被的规定性焚烧，以增加狩猎鸟的数量，用于娱乐性射击，或改善牲畜放牧。近年来，由于担心对生态系统服务的潜在影响，这种土地管理制度引起了争议。然而，关于焚烧的程度、分布或频率的数据有限，而且不清楚焚烧是否存在长期趋势。至关重要的是，燃烧的泥炭土的程度是不为人所知的，我们使用的时间序列的Landsat图像覆盖7750平方公里的高沼地在苏格兰东部，以检测每年的变化，从1985年到2022年燃烧面积。使用归一化燃烧率的年度变化来检测燃烧区域。使用Google Earth图像，实地研究表明，用户的准确率为90%，生产者的准确率为77%。。我们估计年均燃烧面积为61平方公里，年际变化较大，38年研究中燃烧面积没有显著变化。期我们估计，32%的燃烧（19 km2year−1）发生在深层泥炭土上，在2017年修订国家指导方针（Muirburn Code）建议停止这种做法后，深层泥炭的燃烧没有减少。我们发现，在苏格兰东部，过去四十年来，高沼地燃烧面积没有显著变化。在深泥炭上的部分燃烧区域是一个管理问题。
In the Scottish uplands, prescribed burning of moorland vegetation is widely practised either to boost gamebird numbers for recreational shooting or to improve livestock grazing. In recent years, this system of land management has become controversial due to concerns over the potential impacts on ecosystem services. However, there are limited data on the extent, distribution or frequency of burning and it is unclear whether there are long‐term trends in burning. Crucially, the extent of burning on peat soils is not well known.We used a time series of Landsat imagery covering 7750 km2of moorland in Eastern Scotland to detect annual variation in area burnt from 1985 to 2022. Burnt areas were detected using annual changes in Normalised Burn Ratio.An accuracy evaluation conducted over eight sites covering 415 km2using a combination of Google Earth imagery, and field studies suggested a user's accuracy of 90% and a producer's accuracy of 77%.We estimate an average annual mean area burnt of 61 km2with large interannual variability and no significant change in area burnt over the 38‐year study period. We estimate that 32% of burning (19 km2year−1) occurred on deep peat soils with no reduction in burning on deep peat after the revision of national guidelines (the Muirburn Code) in 2017 recommended ceasing this practice.We find that in Eastern Scotland there has been no significant change in moorland area burnt over the last four decades. The fractional area burnt that is on deep peat is a matter of management concern.