Dynamics of coarse woody debris and decomposition rates in an old-growth forest in lower tropical China

Yang, Fangxing; Li, Yuelin; Zhou, Guoyi; Wenigmann, K. O.; Zhang, Deqiang; Wenigmann, Mike; Liu, Shizhong; Zhang, Qianmei

doi:10.1016/j.foreco.2010.01.046

Cited by 58 publications

(73 citation statements)

References 48 publications

(85 reference statements)

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“…Indeed, warmer microclimatic conditions in southern aspects can enhance the CWD decay as a consequence of more intense insolation, higher air and soil temperatures (Barnes et al 1997). Temperature affects decomposition rate, as microbial and invertebrate activity is higher at higher temperatures (Yang et al 2010, Mackensen & Bauhus 2003. It was demonstrated that an increase of 2 °C in temperature increases stem woody debris decay (expressed in density loss) by 9-55% (Yin 1999).…”

Section: Iforest -Biogeosciences and Forestrymentioning

confidence: 99%

Effect of topography on tree species composition and volume of coarse woody debris in an Oriental beech (Fagus orientalis Lipsky) old growth forests, northern Iran

Sefidi¹,

Darabad²,

Azaryan³

2016

iForest

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There is an emerging interest in the relationships between forest structure and topographic aspects. Still, such patterns have been scarcely studied in undisturbed mixed beech forests in northern Iran. We investigated the influence of topographical factors including aspect, slope degree, and landform index (LI) on the distribution of dominant tree species and coarse woody debris (CWD). Tree density and basal area were not significantly correlated with any of the measured parameters, except a moderate relation between basal area and LI (r = -0.376; P = 0.029). Redundancy analysis (RDA) of the tree layer revealed a significant relationship between the measured environmental variables and species distributions. CWD volume showed significant negative correlation with percent canopy coverage and was highly correlated with slope. Density of CWD in decay class IV was significantly correlated with aspect and percent of canopy cover. Analyses of CWD distributions in relation to both living vegetation and topographic gradients showed a highly complex interplay of factors driving the distribution of CWD across the forest stands.

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Section: Iforest -Biogeosciences and Forestrymentioning

confidence: 99%

Effect of topography on tree species composition and volume of coarse woody debris in an Oriental beech (Fagus orientalis Lipsky) old growth forests, northern Iran

Sefidi¹,

Darabad²,

Azaryan³

2016

iForest

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“…The ecological functions of dead wood have been studied extensively in temperate as well as in tropical forests (Aakala 2010, Palviainen et al 2010, Yang et al 2010 (FAO 2010). In contrast to large C storages, there was a decrease of the C stocks of dead wood since 1990-2010 reported by FAO (2010) which was mainly driven by a reduced forest area.…”

Section: Introductionmentioning

confidence: 99%

Carbon and nitrogen stocks in dead wood of tropical lowland forests as dependent on wood decay stages and land-use intensity

et al. 2016

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Meriem S., Tjitrosoedirjo S., Kotowska M.M., Hertel D., Triadiati T., 2016. Carbon and nitrogen stocks in dead wood of tropical lowland forests as dependent on wood decay stages and land-use intensity. Ann. For. Res. 59(2): 299-310.Abstract. Rapid transformation of natural forests into other land-use systems in the lowlands of Sumatra, Indonesia, strongly reduces total aboveground biomass and affects nutrient cycling. However, the consequences of this conversion for C and N stocks of dead wood remains poorly understood particularly in natural forests and jungle rubber. This study examined the differences in dead wood abundance, mass, and C, N and lignin concentrations of three decay stages of dead wood as well as the stocks of these chemical components stored in dead wood. Standing and fallen dead wood was determined as coarse woody debris with diameter ≥ 10 cm and classified into three decay stages of wood. Mass of dead wood was estimated using allometric equation. Total C and N stocks in dead wood in the natural forests (4.5 t C ha -1 , 0.05 t N ha -1 , respectively) were three times higher than those in the jungle rubber (1.5 t C ha -1 , 0.02 t N ha -1 , respectively). The stocks of C and N at early and advanced wood decay stages in the natural forests were also higher than those in the jungle rubber. The decay stages showed pronounced differences in concentrations of chemical components. With advancing stage of wood decay, N concentration increased and C/N ratio decreased, while concentrations of C and lignin were variable. The distribution of dead wood mass and stocks of C, and lignin were found to be higher in the early decay than those in the advanced decay stage. Higher input of dead wood in natural forests indicated a higher importance of dead wood decay in natural forests than in jungle rubber systems. Thus, replacing natural forests with jungle rubber strongly reduces total C and N stocks which might have a marked negative effect on the ecosystems' nutrient turnover and cycle.

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“…Debris quality is important to our understanding of FWD decomposition (Cornelissen 1996;Vávřová et al 2009;Yang et al 2010). Characterized from the microbe's perspective, litter quality is defined by the accessibility of carbon molecules (Couteaux et al 1995).…”

Section: Introductionmentioning

confidence: 99%

Soil warming accelerates decomposition of fine woody debris

2012

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Background and aims Soil warming from global climate change could increase decomposition of fine woody debris (FWD), but debris size and quality may mitigate this effect. The goal of this study was to investigate the effect of soil warming on decomposition of fine woody debris of differing size and quality. Methods We placed FWD of two size classes (2×20 cm and 4×40 cm) and four species (Acer saccharum, Betula lenta, Quercus rubra and Tsuga canadensis) in a soil warming and ambient area at Harvard Forest in central Massachusetts. We collected the debris from each area over two years and measured mass loss and lignin concentration. Results Warming increased mass loss for all species and size classes (by as much as 30%), but larger debris and debris with higher initial lignin content decomposed slower than smaller debris and debris with lower initial lignin content. Lignin degradation did not follow the same trends as mass loss. Lignin loss from the most lignin-rich species, T. canadensis, was the highest despite the fact that it lost mass the slowest. Conclusions Our results suggest that soil warming will increase decomposition of FWD in temperate forests. It is imperative that future models and policy efforts account for this potential shift in the carbon storage pool.

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Dynamics of coarse woody debris and decomposition rates in an old-growth forest in lower tropical China

Cited by 58 publications

References 48 publications

Effect of topography on tree species composition and volume of coarse woody debris in an Oriental beech (Fagus orientalis Lipsky) old growth forests, northern Iran

Effect of topography on tree species composition and volume of coarse woody debris in an Oriental beech (Fagus orientalis Lipsky) old growth forests, northern Iran

Carbon and nitrogen stocks in dead wood of tropical lowland forests as dependent on wood decay stages and land-use intensity

Soil warming accelerates decomposition of fine woody debris

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