The decomposition of branch-wood in the canopy and floor of a mixed deciduous woodland

Swift, M. J.; Healey, I. N.; Hibberd, J. K.; Sykes, Jonathan M.; Bampoe, V.; Nesbitt, Mark

doi:10.1007/bf00582892

Cited by 57 publications

(28 citation statements)

References 7 publications

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“…The differences in the decomposition rates among tree species can be attributed to differences in the initial chemical composition of the branches, since litter quality is an important factor that determines the rates of C and nutrient turnover [7,55,56]. Our results also indicated that each tree species differed in its initial chemical composition and that the decomposition rate was significantly correlated with each parameter of litter quality ( Figure 3).…”

Section: Discussionmentioning

confidence: 58%

Branch Wood Decomposition of Tree Species in a Deciduous Temperate Forest in Korea

Cha

Chae

Lee

et al. 2017

Forests

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Abstract:Woody debris, which is supplied by branch litter, is an important component of forest ecosystems as it contains large quantities of organic matter and nutrients. We evaluated changes in branch wood dry weight and nutrient content of six common species (Fraxinus rhynchophylla, Pinus densiflora, Prunus sargentii, Quercus mongolica, Acer pseudosieboldianum, and Symplocos chinensis for. pilosa) in a deciduous temperate forest in Korea for 40 months. Branch wood disk samples 1.4-1.6 cm thick were cut, and mass loss was measured over time using the litterbag method. No significant differences in mass loss were recorded among the six tree species. Further, mass loss was negatively correlated with initial lignin concentration and positively correlated with both initial cellulose concentration and wood density for each species. Species with high wood cellulose content had high wood density while the lignin content in wood was relatively low. Accordingly, cellulose contributed to wood density, creating a relatively lower lignin content, and the decreased lignin concentration increased the wood decomposition rate.

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Section: Discussionmentioning

confidence: 58%

Branch Wood Decomposition of Tree Species in a Deciduous Temperate Forest in Korea

Cha

Chae

Lee

et al. 2017

Forests

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“…However, due to the preconditioning of most wood before entering streams in nature (Swift et al 1976), it seems to be more important that the present method works well for preconditioned wood. Nevertheless, it remains unknown whether it is closer to natural conditions to use prewetted or dry wood for investigation of processes related to submerged wood in aquatic ecosystems.…”

Section: Discussionmentioning

confidence: 97%

“…The water content of fallen wood is influenced by rainfall before abscission and by the humidity of the soil on which the particular branch lay. Branches entering the streams by litterfall or lateral input from the forest floor are often preconditioned (Swift et al 1976) and moistened (Boddy 1983). …”

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confidence: 99%

Vacuum‐pressure prewetting—A simple and rapid method to water saturate wood for experimental purposes

Spänhoff

2007

Limnology & Ocean Methods

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A simple and rapid method to prepare water‐saturated wood by vacuum‐pressure prewetting is presented. Submerged wood pieces can be prepared easily for any experimental purposes without long periods of prewetting and without additional tools for holding the wood under water. The particular wood piece must be submerged in a water filled suction flask that is connected to a diaphragm vacuum pump. Due to the evacuation of the air from the flask the wood rapidly soaks up water until it is saturated. In the experiments, branches displayed a logarithmic water saturation curve soaking up the highest amount of water during the first 10 s of air evacuation. Most branches were water saturated during this time. The method works best for wood pieces with a low or medium density supporting a rapid soaking of water, whereas very dense wood needs much more time to become water saturated. The main problem of the method is the loss of bark material from natural branches and the splitting of larger woods due to the rapid swelling caused by the water uptake. However, this method could be used for any experimental purposes needing standardized submerged wood, like investigations of epixylic biofilm development, colonization of wood by aquatic invertebrates, decomposition of submerged wood, or invertebrate food choice experiments.

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“…comrn.) cloud cover is expressed as the ratio of actual hours of bright sunshine, n, to the maximum possible sunshine hours, N. Therefore we use the Angstrom relationship in the following way (Swift et al 1976, Jones 1992, Fnend pers. comm.…”

Section: Cass = U Lai(gc)hl[ilai(gc)]h2(t)-h7(sw)mentioning

confidence: 99%

The Frankfurt Biosphere Model: a global process-oriented model of seasonal and long-term CO2 exchange between terrestrial ecosystems and the atmosphere. II. Global results for potential vegetation in an assumed equilibrium state

Kohlmaier¹,

Badeck²,

Otto³

et al. 1997

Clim. Res.

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Regional variability and seasonal courses of atmospheric CO, provide important clues to the understanding of the carbon exchange fluxes which determine the global carbon budget. We apply the Frankfurt Biosphere Model (FBM) to all 32 vegetation types of a modified global Matthews' vegetation map, simulating seasonal carbon exchange fluxes of the terrestrial ecosystems and their geographical variability on a global scale. For each 0.5" by 0.5" grid element the model calculates gross photosynthesis of the canopy and autotrophic respiration on an hourly time step, and heterotrophic respiration as well as the model-compartment sizes and LA1 (leaf area index) on a daily time step. The driving variables temperature, irradiation, and soil moisture are derived from the Cramer and Leemans database. Soil moisture is calculated by an improved bucket model in which the soil properties given by the FAO soil map are combined with the rooting depth of different vegetation types to deduce the available water capacity and the permanent wilting point. Based on mean estimates of ecological variables [e.g. net primary production (NPP), biomass and soil carbon] and a characteristic seasonal c11-mate, the free parameters of each vegetation type are calibrated. With these parameters, taking the climate variation within the vegetation types into account, the seasonal courses of NPP are calculated, summing up to a global annual integral of 50.3 Gt C yr-' The results are presented in the form of a world map showing the annual NPP and a table with monthly values of NPP averaged over 5Olatitude belts. The latter results are graphically displayed not only for NPP but also for heterotrophic respiration and the resulting seasonal net ecosystem production. Since the FBM keeps track of the seasonal development of leaf biomass, the corresponding seasonal LA1 is examined for each grid element. The calculated leaf emergence dates are in good agreement with observations from phenological gardens as well as with NDVI (normalized difference vegitation index) derived phenology.

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The decomposition of branch-wood in the canopy and floor of a mixed deciduous woodland

Cited by 57 publications

References 7 publications

Branch Wood Decomposition of Tree Species in a Deciduous Temperate Forest in Korea

Branch Wood Decomposition of Tree Species in a Deciduous Temperate Forest in Korea

Vacuum‐pressure prewetting—A simple and rapid method to water saturate wood for experimental purposes

The Frankfurt Biosphere Model: a global process-oriented model of seasonal and long-term CO2 exchange between terrestrial ecosystems and the atmosphere. II. Global results for potential vegetation in an assumed equilibrium state

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