Effects of Thinning on the Spatial Structure of Larix principis-rupprechtii Plantation
Structure-based forest management is a scientific and easy-to-operate method for sustainable forest management. We analyzed the stand spatial structure of Larix principis-rupprechtii plantation under five reserve densities. The results indicated that with the decrease of densities after thinning, th...
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doaj-3153276e1da14cec8a63d0cf0d3108f82020-11-25T00:17:40ZengMDPI AGSustainability2071-10502018-04-01104125010.3390/su10041250su10041250Effects of Thinning on the Spatial Structure of Larix principis-rupprechtii PlantationShengxing Ye0Zhirong Zheng1Zhaoyan Diao2Guodong Ding3Yanfeng Bao4Yundong Liu5Guanglei Gao6College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, ChinaState Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment, State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaState Environmental Protection Key Laboratory of Regional Eco-process and Function Assessment, State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, ChinaCollege of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, ChinaChinese Academy of Forestry, Institute of Desertification Studies, Beijing 100091, ChinaCollege of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, ChinaCollege of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, ChinaStructure-based forest management is a scientific and easy-to-operate method for sustainable forest management. We analyzed the stand spatial structure of Larix principis-rupprechtii plantation under five reserve densities. The results indicated that with the decrease of densities after thinning, the average mingling degree and uniform angle index had an increasing tendency, but the amplitude was small. Most of the trees were in zero mix, and a few of them were in moderate, strong, and relatively strong mix; the horizontal distribution patterns were uniform or near-uniform random. The distribution of neighborhood comparison and opening degree changed with a fluctuant pattern, but thinning decreased the competitive intensities to some extent. A composite structure index (Ci) was established, based on the relative importance of the above four indicators, to evaluate the overall effect of thinning on stand structure characteristics. The findings showed that Ci increased with the increase of thinning intensity, that is, the stand spatial structure became more complex. This indicated that Ci may be a simple and rapid indicator to evaluate the overall effect of thinning on stand spatial structure within densities after thinning.http://www.mdpi.com/2071-1050/10/4/1250plantationthinningspatial structureLarix principis-rupprechtiistructure-based forest managementcomposite structure index |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Shengxing Ye Zhirong Zheng Zhaoyan Diao Guodong Ding Yanfeng Bao Yundong Liu Guanglei Gao |
spellingShingle |
Shengxing Ye Zhirong Zheng Zhaoyan Diao Guodong Ding Yanfeng Bao Yundong Liu Guanglei Gao Effects of Thinning on the Spatial Structure of Larix principis-rupprechtii Plantation Sustainability plantation thinning spatial structure Larix principis-rupprechtii structure-based forest management composite structure index |
author_facet |
Shengxing Ye Zhirong Zheng Zhaoyan Diao Guodong Ding Yanfeng Bao Yundong Liu Guanglei Gao |
author_sort |
Shengxing Ye |
title |
Effects of Thinning on the Spatial Structure of Larix principis-rupprechtii Plantation |
title_short |
Effects of Thinning on the Spatial Structure of Larix principis-rupprechtii Plantation |
title_full |
Effects of Thinning on the Spatial Structure of Larix principis-rupprechtii Plantation |
title_fullStr |
Effects of Thinning on the Spatial Structure of Larix principis-rupprechtii Plantation |
title_full_unstemmed |
Effects of Thinning on the Spatial Structure of Larix principis-rupprechtii Plantation |
title_sort |
effects of thinning on the spatial structure of larix principis-rupprechtii plantation |
publisher |
MDPI AG |
series |
Sustainability |
issn |
2071-1050 |
publishDate |
2018-04-01 |
description |
Structure-based forest management is a scientific and easy-to-operate method for sustainable forest management. We analyzed the stand spatial structure of Larix principis-rupprechtii plantation under five reserve densities. The results indicated that with the decrease of densities after thinning, the average mingling degree and uniform angle index had an increasing tendency, but the amplitude was small. Most of the trees were in zero mix, and a few of them were in moderate, strong, and relatively strong mix; the horizontal distribution patterns were uniform or near-uniform random. The distribution of neighborhood comparison and opening degree changed with a fluctuant pattern, but thinning decreased the competitive intensities to some extent. A composite structure index (Ci) was established, based on the relative importance of the above four indicators, to evaluate the overall effect of thinning on stand structure characteristics. The findings showed that Ci increased with the increase of thinning intensity, that is, the stand spatial structure became more complex. This indicated that Ci may be a simple and rapid indicator to evaluate the overall effect of thinning on stand spatial structure within densities after thinning. |
topic |
plantation thinning spatial structure Larix principis-rupprechtii structure-based forest management composite structure index |
url |
http://www.mdpi.com/2071-1050/10/4/1250 |
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