侧柏人工林林分结构与色彩斑块间的耦合关系

赵凯; 李金航; 徐程扬

doi:10.13332/j.1000-1522.20180316

侧柏人工林林分结构与色彩斑块间的耦合关系

Coupling relationship between stand structure and color patch of Platycladus orientalis plantations

摘要

摘要:
目的色彩是森林景观中最易影响感官的信息要素，也是衡量景观质量高低的重要指标，而林分结构是影响林内景观质量的重要因子。本文旨在通过林分结构与色彩斑块的耦合关系，对北京山区侧柏人工风景林林内景观质量的影响机理进行探讨。
方法采用主成分分析构建林分结构因子，通过灰色关联度分析研究林分结构与景观色彩斑块的耦合关联程度，并结合单因素方差分析和多重比较的方法研究两者间的变化规律。
结果(1) 4个因子对林分结构的影响程度依次为：林内空间因子＞植被生长因子＞林木高度因子＞林内竞争因子。(2)林分结构与景观色彩斑块的耦合关联度为0.6，属弱协调程度。其中，相关关系耦合度较大的指标包括：林内空间因子与色彩最大斑块比例(LPI)和斑块色彩多样性(SHDI)、植被生长因子与色彩斑块分离度(SPL)和色彩对比度(CPC)、林木高度因子与SHDI、SPL和CPC、林内竞争因子与色彩斑块亮度(CPB)。(3)植被生长仅在中低水平上对LPI有显著影响；林下相对高度仅在较高水平时对CPB和CPC有显著影响；而林内竞争程度在中低水平上对CPB和CPC有显著影响，在较高水平上对SPL有显著影响。
结论侧柏人工风景林林内景观色彩斑块与林分结构属中等关联程度，林分结构因子对色彩斑块的影响存在差异：不同林分结构因子所影响的色彩斑块指标、同一林分结构因子在不同水平上所影响的色彩斑块指标以及对色彩斑块的影响程度不尽相同，两者间存在相对复杂的耦合关系。

Abstract:
ObjectiveColor is not only the most sensitive information element in forest landscape, but also an important indicator to measure the quality of landscape. And forest structure is an important factor affecting the quality of forest landscape. So this paper aims to explore the influencing mechanism of the landscape quality in Platycladus orientalis plantations in Beijing mountain area through the coupling relation of stand structure and color patch.
MethodStand structure factors were constructed by principal component analysis, and the coupling correlation degree between forest structure and landscape color patches was studied by grey correlation analysis, and the change law between them was studied by univariate variance analysis and multiple comparison.
Result(1) The influence degree of four factors on stand structure is, in order, forest space factor > vegetation growth factor > forest height factor > forest competition factor. (2) The coupling correlation between forest structure and landscape color patches was 0.6, which was a weak coordination degree. Among them, the indicators with high correlation coupling degree included: forest space factor with LPI and SHDI; vegetation growth factor with SPL and CPC; forest height factor with SHDI and SPL and CPC; forest competition factor with CPB. (3) Vegetation growth only had a significant impact on LPI at the medium and low levels; The relative height of forest had significant effects on CPB and CPC only at a higher level. However, the intensity of intra-forest competition had a significant impact on CPB and CPC at the medium and low levels, and on the higher level, it had a significant impact on SPL.
ConclusionThe releationship between color patch and stand structure is medium correlation degree, and stand structure actors influence on color patch differences: color patch index affected by different stand structure factors, and color patch index affected by the same stand structure factor in different levels, and degree of influence on colour patch is not the same.So there is a relatively complex coupling relationship between them.

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