Current and potential tree locations in tree line ecotone of Changbai Mountains, Northeast China: the controlling effects of topography.
Current and potential tree locations in tree line ecotone of Changbai Mountains, Northeast China: the controlling effects of topography.
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东北长白山林线交错带当前和潜在的树木位置：地形的控制作用
DOI：
10.1371/journal.pone.0106114
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Wang L
中科院分区：
文献类型：
--
作者：
Zong S;Wu Z;Xu J;Li M;Gao X;He H;Du H;Wang L
长白山林线交错带在过去的几十年里经历了巨大的变化。树木的位置显示出在山的四侧的变化，特别是在北方和西部的两侧，这还没有得到充分的解释。以前的研究将这种变化归因于温度的变化。然而，在这项研究中，我们假设，地形控制是负责造成的树木位置的变化，在林线交错带的长白山。为了验证这一假设，我们使用IKONOS图像和WorldView-1图像来识别树木的位置，并开发了一个逻辑回归模型，使用地形变量来识别树木位置的主导控制。结果表明，在山西侧，坡向、湿度和坡度是影响乔木层位置的主导因子，而在北方侧，海拔、SPI和坡向是影响乔木层位置的主导因子。树木目前能到达的最高海拔在北方为2140米，在西部为2060米。模型预测结果表明，目前两侧林木线以上的生境均为林木可利用生境。在当前树线下的树木补充可以利用基于当前树木位置的较高海拔处的可用栖息地。研究结果证实了地形对长白山林线交错带树木位置的控制作用，并提出在林线交错带研究中，评估树木对地形的响应是必要的。
Tree line ecotone in the Changbai Mountains has undergone large changes in the past decades. Tree locations show variations on the four sides of the mountains, especially on the northern and western sides, which has not been fully explained. Previous studies attributed such variations to the variations in temperature. However, in this study, we hypothesized that topographic controls were responsible for causing the variations in the tree locations in tree line ecotone of the Changbai Mountains. To test the hypothesis, we used IKONOS images and WorldView-1 image to identify the tree locations and developed a logistic regression model using topographical variables to identify the dominant controls of the tree locations. The results showed that aspect, wetness, and slope were dominant controls for tree locations on western side of the mountains, whereas altitude, SPI, and aspect were the dominant factors on northern side. The upmost altitude a tree can currently reach was 2140 m asl on the northern side and 2060 m asl on western side. The model predicted results showed that habitats above the current tree line on the both sides were available for trees. Tree recruitments under the current tree line may take advantage of the available habitats at higher elevations based on the current tree location. Our research confirmed the controlling effects of topography on the tree locations in the tree line ecotone of Changbai Mountains and suggested that it was essential to assess the tree response to topography in the research of tree line ecotone.
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影响因子：
6.4
作者：
HUTCHINSON, MF
通讯作者：
HUTCHINSON, MF
影响因子：
2.8
作者：
BROWN, DG
通讯作者：
BROWN, DG
影响因子：
4.2
作者：
Grace, J;Berninger, F;Nagy, L
通讯作者：
Nagy, L
影响因子：
3.9
作者：
Körner, C;Paulsen, J
通讯作者：
Paulsen, J
影响因子：
2
作者：
Gooseff, MN;Lyons, WB;Dowling, C
通讯作者：
Dowling, C