Line thinning promotes stand growth and understory diversity in Japanese cedar (<i>Cryptomeria japonica</i> D. Don) plantations

Ishiga, Hiroaki; Maleque, M. Abdul; Taniguchi, Shingo

doi:10.1007/s10310-007-0051-7

Cited by 41 publications

(32 citation statements)

References 24 publications

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“…Other stand improvement treatments, such as cleaning, thinning and pruning, also exhibited this compatibility, which was in agreement with the findings of Ishii et al (2008). These improvement treatments did not directly affect the tally trees in the stands, or presented a harvest ratio that was similar to (or slightly below) the harvest ratio corresponding to selection cuttings, which suggests that this range of harvest ratios is suitable for achieving effective biodiversity enhancement.…”

Section: Discussionsupporting

confidence: 87%

Changes in biodiversity indicators in managed and unmanaged forests in NE Spain

Torras

Gil‐Tena

Saura

2012

Journal of Forest Research

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Major changes in Mediterranean forests have occurred in recent decades, mainly as a result of the abandonment of traditional activities and population decline in rural areas. In this study, we analyzed the short-term (11-year) evolution of forests in the region of Catalonia (NE Spain) and the role of management, by comparing seven biodiversity indicators estimated from 7,664 plots from the Second and Third Spanish National Forest Inventory. We evaluated the changes in unmanaged and managed stands with different silvicultural treatments, and considered the effect of stand density and land ownership on these dynamics. We found a general naturalization and maturation of forests and an increase in all of the biodiversity indicators investigated during the study period, with the increments being greater in unmanaged than in managed plots. Some types of silvicultural treatments, such as selection cutting or thinning, were shown to be compatible with an increase in the analyzed indicators, and thus were more adequate for a multifunctional management that considers forest production together with the maintenance or improvement of the diversity of forest communities. The increases in shrub species richness and in the number of large-diameter trees after silvicultural treatments were more prominent in dense stands. Private lands presented greater short-term increases than public forests in all biodiversity indicators, except for large-diameter trees. From these results, we concluded that the application of silvicultural treatments can be a key tool to shape and maintain diverse and healthy forest structures in the context of socioeconomic and environmental changes in the Mediterranean region, which may induce potentially excessive densification and homogenization of some forest stands and landscapes.

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Section: Discussionsupporting

confidence: 87%

Changes in biodiversity indicators in managed and unmanaged forests in NE Spain

Torras

Gil‐Tena

Saura

2012

Journal of Forest Research

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“…Line-thinned plots support higher biomass and species richness of understory vegetation and corresponding insect abundance in Cryptomeria plantations in Japan (Maleque et al, 2006b(Maleque et al, , 2007aIshii et al, 2008). Ohsawa (2004) showed that species richness of cerambycid beetles increased in selectively thinned larch plantations (Larix kaempferi) compared to unthinned plantations in Japan.…”

Section: Use Of Bioindicators In Forest Man-agementmentioning

confidence: 90%

Arthropods as bioindicators of sustainable forest management, with a focus on plantation forests

Maleque

Maetô

Ishiga

2009

Appl. Entomol. Zool.

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149

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Here we review the bioindicator potentials of several arthropod groups in forest management. First, we describe the indicator potentials of frequently used arthropod groups in general forest management, and then evaluate ecosystem function and plural taxonomic groups to infer forest biodiversity. We then review indicator potentials of arthropod groups to explore the ecological consequences of forest management practices. Different arthropod groups respond differently to forest management. Ants, carabid beetles, and spiders often respond to local-scale, disturbance-induced vegetation development caused by thinning and can be used to infer the ecological suitability of forest management treatments. Dung beetles and moths respond to habitat alterations caused by forest fragmentation and can indicate the suitability of landscape-level forest management techniques. Butterflies and cerambycid beetles respond highly positively to the presence of herbaceous plants and understory trees and can be used to infer the integrity of thinning treatments in forest management. Syrphid flies, which are strong flyers associated with vegetation complexity, can be used as bioindicators of landscape-level forest management practices. Monitoring regulatory service providers may also help when designing forest management practices. We propose using arthropod bioindicator groups to effectively design and assess ecologically sustainable management plans for both natural and plantation forests.

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“…As a result, studies on the effects of thinning on restoring or rehabilitating plant species diversity are increasing. These studies have shown that thinning enhanced the species richness of broadleaved trees in plantations of Abies sachalinensis [29] and Larix kaempferi [30] in northern Japan, and in C. japonica plantations in western [31] and central [32] Japan. However, Nagai and Yoshida [33] showed that thinning of Picea glehnii plantations in northern Japan reduced plant species diversity because of the direct effect of physical disturbance associated with the activity.…”

Section: Studies On Plant Species Diversity and Species Richness In Pmentioning

confidence: 98%

Review of Plant Species Diversity in Managed Forests in Japan

Nagaike¹

2012

ISRN Forestry

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The effects of conifer plantation management and forest fragmentation on plant species diversity in Japan were reviewed. While most studies have demonstrated that the practice of thinning in coniferous plantations can enhance species diversity of naturally regenerated trees, such as broad-leaved trees, some have shown that thinning reduces plant species diversity through the direct physical disturbance to forests. In addition, plant species diversity in plantations has also been shown to be dependent on the distance from seed sources. Extensive forest fragmentation due to land use changes has occurred, particularly in forests near urban and suburban areas. Although the number of species per unit area in abandoned coppice forests is not clearly related to the extent of forest fragmentation, most species attributes (such as rare species) are negatively influenced by forest fragmentation. Some of the forests owned by shrines and temples in urban areas are similar to island forests and are relatively well protected from human disturbance. To more clearly understand and evaluate changes in biodiversity through forest management, elucidating the interactions between management and plant species diversity, species composition, and the ecological traits of various species is therefore necessary.

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Line thinning promotes stand growth and understory diversity in Japanese cedar (Cryptomeria japonica D. Don) plantations

Cited by 41 publications

References 24 publications

Changes in biodiversity indicators in managed and unmanaged forests in NE Spain

Changes in biodiversity indicators in managed and unmanaged forests in NE Spain

Arthropods as bioindicators of sustainable forest management, with a focus on plantation forests

Review of Plant Species Diversity in Managed Forests in Japan

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