Article
Forestry
Ville Kankare, Ninni Saarinen, Jiri Pyorala, Tuomas Yrttimaa, Jari Hynynen, Saija Huuskonen, Juha Hyyppa, Mikko Vastaranta
Summary: The study found that different silvicultural treatments did not significantly affect mean wood density, but the relationship between structural characteristics and mean ring width was more pronounced under varying treatments. Single time terrestrial laser scanning can capture the variability of structural characteristics and their interactions with mean ring width.
Article
Plant Sciences
Gonzalo Perez-de-Lis, Cyrille B. K. Rathgeber, Laura Fernandez-de-Una, Stephane Ponton
Summary: The study examined the spatio-temporal relationship in tree rings during cell enlargement and wall thickening processes, finding that wall thickening progresses more rapidly than enlargement. Increasing the number of sectors above a certain threshold has limited effect on time resolution, with overlapping sector formation reducing synchronicity and stability, especially in narrow rings and during wall thickening.
Article
Computer Science, Information Systems
Zhedong Ge, Ziheng Zhang, Liming Shi, Shuai Liu, Yisheng Gao, Yucheng Zhou, Qiang Sun
Summary: This paper proposes a DAF-Net++ model based on U-Net for the semantic segmentation of annual rings in wood. By utilizing VGG16, dense jump links, CBAM, and DCAM, the model overcomes the challenges of segmenting dense areas and dealing with defects. Experimental results demonstrate that DAF-Net++ outperforms other segmentation models, achieving high accuracy in the CT image segmentation of Chinese fir annual rings.
Article
Materials Science, Paper & Wood
Gonca Duzkale Sozbir, Ibrahim Bektas, Aysenur Kilic Ak, Saniye Erkan
Summary: Thyme oil was found to enhance the physical and mechanical properties of wood, reduce water absorption, and improve wood strength when used in the impregnation process, especially in combination with heat treatment. The impregnation process with thyme oil shows promise for the wood protection industry due to its anti-fungal and antibacterial properties, as well as its environmentally friendly nature.
Article
Forestry
Yunpeng Wang, Rui Zhang, Zhichun Zhou
Summary: Schima superba is a valuable broadleaf tree species with systematic radial variation in wood anatomical properties. Different growth stages exhibit varying degrees of variability, with mature wood forming after the 16th year.
Article
Materials Science, Paper & Wood
Ying Guan, Hui Gao, Hao Shen, Wenqi Li, Yule Wu, Ran Yang
Summary: The bark of Pteroceltis tatarinowii is a main raw material for Xuan paper production, with bark from trees aged 2 to 3 years identified as the most suitable for manufacturing. Analysis of anatomical properties and chemical compositions showed significant differences in properties between bark and branch wood, with variations in length, width ratios, and lignin content influencing material selection for Xuan paper production.
Article
Forestry
Forough Soheili, Stephen Woodward, Isaac Almasi, Hazandy Abdul-Hamid, Hamid Reza Naji
Summary: Tree decline due to climate change leads to physiological weaknesses, pests and pathogens attacks, as well as threats to forest ecosystem stability. The study investigated the effects of drought on Persian oak in western Iran, finding that declining trees had higher wood density, narrower ring width, reduced vessel diameter and area, and more vessels and tylose in the pith towards the bark. The changes in anatomical features are associated with tree weakening and declining tree health.
Article
Geochemistry & Geophysics
Andrzej Z. Rakowski, Jacek Pawlyta, Hiroko Miyahara, Marek Krapiec, Mihaly Molnar, Damian Wiktorowski, Masayo Minami
Summary: The article presents the results of measuring radiocarbon concentration in English oak tree rings in southern Poland and confirms a prolonged increase in radiocarbon values during a specific time period. The study also suggests that this event may consist of two smaller events.
Article
Geography, Physical
Wenxia Dai, Yiheng Jiang, Wen Zeng, Ruibo Chen, Yongyang Xu, Ningning Zhu, Wen Xiao, Zhen Dong, Qingfeng Guan
Summary: This study proposes a novel multi-directional collaborative convolutional neural network (MDC-Net) for wood-leaf separation from terrestrial laser scanning (TLS) data, which is crucial for quantifying biophysical properties and understanding ecological functions. The MDC-Net incorporates multi-directional neighborhood construction and collaborative feature encoding to mitigate occlusion effects and enhance discrimination for thin structures. Experimental results demonstrate that the MDC-Net outperforms other methods and has the potential to facilitate the usage of TLS in ecology studies.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2023)
Article
Forestry
Jun-Hui Park, En-Bi Choi, Jongduk Jung, Jong-Kab Kim, Jeong-Wook Seo
Summary: This study aimed to investigate the effects of abiotic factors and the spread of Sasa spp. on the growth of Rhododendron spp. at high elevations in Korea. The death years of Rhododendron spp. were determined using cross-dating method and their relationship with bioclimate predictors was analyzed. The results showed that summer temperature is a limiting factor for the growth of Rhododendron spp.
Article
Environmental Sciences
R. D'Andrea, C. Corona, A. Poszwa, C. Belingard, M. Dominguez-Delmas, M. Stoffel, A. Crivellaro, R. Crouzevialle, F. Cerbelaud, G. Costa, S. Paradis-Grenouillet
Summary: Dendroprovenancing is a valuable tool for tracing the origin of wood products, and this study presents a method to determine the source of oak trees in a specific region in France. By combining tree-ring width, wood anatomical analyses, and geochemical signatures, the researchers were able to accurately identify the origin of the trees. The results demonstrate the potential of combining multiple approaches in dendroprovenancing studies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Forestry
Phillimon Ng'andwe, Donald Chungu, Frank Tailoka, Michael Bwembya
Summary: This study investigated the response of non-native Pinus kesiya in Zambia to climate change, finding that dry season precipitation is a limiting factor for tree growth. The tree-ring width chronology at different sites is positively modulated by precipitation, but negatively by solar radiation and temperature, with trees near emission sources showing significantly higher growth than those at remote sites.
Article
Environmental Sciences
T. Scharnweber, E. Rocha, A. Gonzalez Arrojo, S. Ahlgrimm, B. E. Gunnarson, S. Holzkamper, M. Wilmking
Summary: In micro-densitometry of wood, extraction of resin and soluble compounds is common practice before X-ray analysis to eliminate their influence on wood density. However, studies using X-ray fluorescence analysis on dendrochemicals are often conducted without prior extraction, which can influence element profiles. This study tested the effect of different solvents and extraction times on elemental time series of three tree species, finding that extraction did not significantly change the trends for most elements but did affect the levels and trends of certain elements, with water extraction being the most effective. The results contribute to the interpretation and evaluation of element profiles in dendro-environmental research.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Ecology
Chunsong Wang, Zhuangpeng Zheng, Feifei Zhou, Xinsheng Liu, Patrick Fonti, Jiani Gao, Keyan Fang
Summary: This study compared the dynamics of opposite wood (OW) and compression wood (CW) in a humid subtropical environment and found differences in the response and anatomical parameters between the two types of wood during wood formation.
FRONTIERS IN FORESTS AND GLOBAL CHANGE
(2023)
Article
Plant Sciences
Songfeng Diao, Honggang Sun, David I. Forrester, Alvaro A. V. Soares, Thiago P. Protasio, Jingmin Jiang
Summary: Silvicultural practices greatly enhance the economic value of forest wood products, and this research investigates the effects of stand density and stem height on the wood properties of S. tzumu trees. The results reveal that stand density significantly influences tree ring growth, wood quality, and stem form.
FRONTIERS IN PLANT SCIENCE
(2022)
