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首页> 外文期刊>The holocene >The role of tree composition in Holocene fire history of the hemiboreal and southern boreal zones of southern Sweden, as revealed by the application of the Landscape Reconstruction Algorithm: Implications for biodiversity and climate-change issues
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The role of tree composition in Holocene fire history of the hemiboreal and southern boreal zones of southern Sweden, as revealed by the application of the Landscape Reconstruction Algorithm: Implications for biodiversity and climate-change issues

机译：景观重建算法的应用揭示了树木组成在瑞典南部半实体和南部北方地区全新世火史中的作用：对生物多样性和气候变化问题的影响

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摘要

We present a quantitative reconstruction of local forest history at two sites, Stavsåkra (hemiboreal zone) and Storasjö (southern boreal zone), in southern Sweden (province of Småland) to evaluate possible causes of contrasting Holocene fire histories in mid- and late Holocene. The Landscape Reconstruction Algorithm (LRA) is applied to evaluate becween-site differences in the relative abundance of deciduous trees and Pinus (pine) and landscape/woodland openness during the Holocene. The LRA estimates of local vegetation abundance are compared with other proxies of local vegetation, that is, plant and beetle remains. The LRA results suggest that Pinus was a major tree taxon in the woodlands of Storasjö during mid- and late Holocene, while Tilia (linden) and Betula (birch) were dominant at Stavsåkra. The contrasting fire histories are shown to be strongly related to between-site differences in tree composition during mid-Holocene, 4000-2000 bc in particular. The archaeological/historical and beetle data indicate contrasting land uses from c. 1000 bc (late Bronze Age/early Iron Age), grazing in open Calluna heaths at Stavsåkra and woodland grazing at Storasjö. Between-site differences in fire history during late Holocene were likely due to different land-use practices. Between-site differences in tree composition in mid-Holocene are best explained by local climatic and geological/geomorphological differences between the hemiboreal and southern boreal zones of Småland, which might also be the primary cause of between-site differences in land-use histories during late Holocene. Maintenance of biodiversity at the landscape scale in the study area requires that existing old pine woodlands and Calluna heath are managed with fire and cattle grazing. Further climate warming might lead to higher probabilities of climate-induces fire, in particular in pine-dominated woodlands.
机译：我们在瑞典南部（斯莫兰省）的两个站点Stavsåkra（半海岸带）和Storasjö（北寒带）提供了当地森林历史的定量重建，以评估全新世中期和晚期新世火史形成对比的可能原因。应用景观重建算法（LRA）评估全新世期间落叶乔木和松树（松树）的相对丰度与景观/林地的开放度之间的站点间差异。 LRA对当地植被丰度的估计值与其他本地植被代理（即植物和甲虫残骸）进行了比较。 LRA结果表明，在全新世中期和晚期，松属是Storasjö林地的一个主要树类群，而Stavsåkra的Tilia（菩提树）和Betula（桦木）则是主要树种。结果表明，相反的火史与全新世中期（尤其是公元前4000-2000年）树木之间的站点组成差异密切相关。考古/历史和甲虫的数据显示了c中土地利用的对比。公元前1000年（青铜时代晚期/铁器早期），在Stavsåkra在露天的卡卢纳（Calluna）荒地放牧，在Storasjö放牧在林地。全新世晚期火灾历史的现场间差异可能是由于不同的土地利用方式造成的。全新世中部树木组成之间的站点间差异最好用Småland的半实物和南部寒带之间的局部气候和地质/地貌差异来解释，这也可能是造成该地区土地利用历史上站点间差异的主要原因。全新世晚期。要在研究区域的景观尺度上维持生物多样性，就必须用火和牛放牧来管理现有的老松林地和卡卢纳荒地。进一步的气候变暖可能导致更高的可能性，特别是在以松树为主的林地中，引发气候火灾。

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