Regeneration patterns after intermediate wind disturbance in an old-growth Fagus-Abies forest in southeastern Slovenia
Regeneration patterns after intermediate wind disturbance in an old-growth Fagus-Abies forest in southeastern Slovenia
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DOI：
10.1016/j.foreco.2006.01.039
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发表时间：
2006-05-01
影响因子：
3.7
通讯作者：
Diaci, J
中科院分区：
文献类型：
--
作者：
Nagel, TA;Svoboda, M;Diaci, J
我们研究了斯洛文尼亚东南部老生水青冈-白冷杉森林中与树冠结构相关的树木再生模式，其中包括 1983 年中度风暴损坏的 1 公顷地块和由小规模树冠间隙调节的 1 公顷对照地块。在风投图中，相互连接的间隙迷宫覆盖了图块的 55%，而更离散的树冠开口覆盖了控制图块的 27%。不同的树冠结构导致两个地块中树木再生的密度和空间格局存在显着差异。水青冈在这两个地块的再生层中占主导地位，而冷杉很少出现。对于水青冈来说，与对照地块相比，风抛地块中的幼苗数量减少了近六倍，但树苗和林下树木的数量却是对照地块的两倍。总体而言，两个样地中水青冈幼苗、幼树和林下树木的空间格局都聚集在一起，但对照样地中只有树苗和林下树木聚集在树冠间隙下，而风投地块中的树苗分布与树冠间隙无关。冷杉个体也有聚集的空间分布，但生长在封闭的树冠下。我们认为，不频繁的中度风暴扰动在中欧森林的结构和动态中发挥着重要作用，因为它创造了比小规模间隙过程调节的林分更粗粒度的森林结构。 (c) 2006 Elsevier B.V. 保留所有权利。
We studied patterns of tree regeneration in relation to canopy structure in a 1-ha plot damaged by an intermediate windstorm in 1983 and a 1-ha control plot regulated by small-scale canopy gaps in an old-growth Fagus sylvatica-Abies alba forest, southeastern Slovenia. In the windthrow plot, a maze of interconnected gaps covered 55% of the plot, while more discrete canopy openings covered 27% of the control plot. The different canopy structures resulted in marked differences in the density and spatial patterns of tree regeneration in the two plots. Fagus dominated the regeneration layer in both plots, while Abies occurred infrequently. For Fagus, there were nearly six-fold less seedlings, but twice as many saplings and understory trees in the windthrow plot compared to the control plot. Overall, the spatial patterns of Fagus seedlings, saplings, and understory trees were clumped in both plots, but only saplings and understory trees were aggregated under canopy gaps in the control plot, whereas saplings in the windthrow plot were distributed irrespective of canopy gaps. Abies individuals also had an aggregated spatial distribution, but were growing under a closed canopy. We suggest that infrequent, intermediate windstorm disturbance plays an important role in the structure and dynamics of central European forests by creating more coarse-grained forest structures than in stands regulated by smaller-scale gap processes. (c) 2006 Elsevier B.V. All rights reserved.