Variation in the amount and quality of litterfall in a Pinus sylvestris L. stand growing on a bog

Finér, Leena

doi:10.1016/0378-1127(95)03652-0

Cited by 53 publications

(41 citation statements)

References 16 publications

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“…by Ellenberg et al (1986) or Finer (1996) who both found 1.4-fold variation within a 10 year period for beech and pine. In fact 1999 was a very dry year and it may be that a considerable fraction of foliage biomass was shed before the harvest.…”

Section: Discussionmentioning

confidence: 91%

Competition-dependent modelling of foliage biomass in forest stands

Grote

Reiter²

2004

Trees

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Currently, foliage biomass is estimated based on stem diameter or basal area. However, it is questionable whether the relations between foliage and stem observed from plantations of a single tree species can be applied to stands of different structure or species composition. In this paper, a procedure is presented to simulate foliage and branch biomass of tree crowns relative to crown size and light competition. Crowns are divided into layers and segments and each segment is divided into a foliated and an unfoliated fraction. Depending on the competitive status of the segment, leaf area density, specific leaf area and foliated branch fraction are determined. Based on this information, foliage biomass is calculated. The procedure requires a crown shape function and a measure to characterise competition for light and space of each individual segment within the canopy. Simple solutions are suggested for both requirements to enable an application with data that can be measured non-destructively in the field; these were stem position, tree height, crown base height, crown radii and some general crown shape information. The model was parameterised from single trees of Norway spruce and European beech and partly evaluated with independent data close to the investigation plot. Evaluations showed that the model can attribute the ecology of the different crown forms. Modelled foliage distribution for beech and spruce as well as total needle biomass of spruce agreed well with measurements but foliage biomass of beech was underestimated. The results are discussed in the context of a general model application in structured forests.

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Section: Discussionmentioning

confidence: 91%

Competition-dependent modelling of foliage biomass in forest stands

Grote

Reiter²

2004

Trees

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“…The needle litter was collected from our ombrotrophic study site with litter traps (Finér 1996). The root litter was obtained from nursery-grown Scots pine seedlings.…”

Section: Decomposition Measurementsmentioning

confidence: 99%

Scots pine litter decomposition along drainage succession and soil nutrient gradients in peatland forests, and the effects of inter-annual weather variation

Laiho

Laine

Trettin

et al. 2004

Soil Biology and Biochemistry

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Peatlands form a large carbon (C) pool but their C sink is labile and susceptible to changes in climate and land-use. Some pristine peatlands are forested, and others have the potential: the amount of arboreal vegetation is likely to increase if soil water levels are lowered as a consequence of climate change. On those sites tree litter dynamics may be crucial for the C balance. We studied the decomposition of Scots pine (Pinus sylvestris L.) needle and root litter in boreal peatland sites representing gradients in drainage succession (succession following water level drawdown caused by forest drainage) and soil nutrient level during several years of varying weather conditions. Neither gradient had an unambiguous effect on litter mass loss. Mass loss over 2 years was faster in undrained versus drained sites for both needle litter, incubated in the moss layer, and fine root litter, incubated in 0-10 cm peat layer, suggesting moisture stress in the surface layers of the drained sites limited decomposition. Differences among the drained sites were not consistent. Among years, mass loss correlated positively with precipitation variables, and mostly negatively or not at all with temperature sum. We concluded that a long-term water-level drawdown in peatlands does not necessarily enhance decay of fresh organic matter. Instead, the drained site may turn into a ' large hummock-system' where several factors, including litter quality, relative moisture deficiency, higher acidity, lower substrate temperature, and in deeper layers also oxygen deficiency, may interact to constrain organic matter decomposition. Further, the decomposition rates may not vary systematically among sites of different soil nutrient levels following water-level drawdown. Our results emphasize the importance of annual weather variations on decomposition rates, and demonstrate that single-period incubation studies incorporate an indeterminable amount of temporal variation.

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“…Given the fact that every hectare of mass stores an average of 1.58 tons of carbon annually in one hand and artificial refining of carbon which is estimated to be 200 US dollars [2] on the other hand, the environmental cost of an area of 278 ha during the growth period estimated to be 1,250,000 US dollars which showed to be much more greater than the cost of maintaining and preserving the stand.…”

Section: Discussionmentioning

confidence: 99%

“…The universal phenomenon of global warming originates mainly from continual increase in the production of greenhouse gases such as CO 2 , fossil fuels consumption, forest destruction, irregular grazing of pastures, land use change and some other activities resulting in human life development [4] . The density of greenhouse gases increased considerably during the period of industrial revolution, especially in the contemporary century when the concentration of carbon dioxide rose from 280 ppm before industrial revolution to 386 ppm in 2006.…”

Section: Introductionmentioning

confidence: 99%

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A Study on Potentiality of Carbon Storage and CO2 Uptake in the Biomass and Soil of Coppice Stand

Khademi¹,

Babaei²,

Mataji³

2009

American J. of Environmental Sciences

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Problem statement: Enhancing carbon storage in terrestrial ecosystems, especially in the forests, is a key factor in maintaining the atmosphere's carbon balance. With regard to the importance of forest in carbon sequestration, this study attempted to investigate the carbon storage potential and CO 2 uptake in oak coppice stand. Approach: After combining slope, aspect and hypsometric maps, the number of land units (polygons) as well as their areas were determined. Then 60 sample trees were selected in such a way that all environmental and typological conditions were taken into account. After determining the overall weight of different parts of tree, to measure the dry weight as well as to determine the amount of biomass, different parts of tree were transformed to a kiln. The humus was collected and weighted in an area of 400 cm 2 under each tree. The quantity of ash was taken away from biomass, then the amount of organic sequestrated carbon as well as that of CO 2 uptake was measured. To determine the amount of carbon stored in the soil samples were extracted from the depths of 0-10 and 10-30 cm. Results: The amount of organic sequestrated carbon was 22.65 tons ha −1 . The trunk, root, branch, soil, leaf and humus had the maximal amount of storage respectively. The annual carbon dioxide uptake was 5.94 tons ha −1 . Conclusion: Coppice stands had massive plant coverage as well as an increase in biomass production if the destructive factors were removed from these areas.

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Variation in the amount and quality of litterfall in a Pinus sylvestris L. stand growing on a bog

Cited by 53 publications

References 16 publications

Competition-dependent modelling of foliage biomass in forest stands

Competition-dependent modelling of foliage biomass in forest stands

Scots pine litter decomposition along drainage succession and soil nutrient gradients in peatland forests, and the effects of inter-annual weather variation

A Study on Potentiality of Carbon Storage and CO2 Uptake in the Biomass and Soil of Coppice Stand

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