Springer Old Growth Forests - Chapter 20 ppt

... of unsustainable forest use. 20. 3 Consideration of Old- Growth Forests in UN Processes 20. 3.1 Old- Growth Forests and the UN Framework Convention on Climate Change Old- growth forests are usually characterised ... in their forests, including old- growth forests. But if old- growth forests are considered ‘‘unmanaged’’ they are excluded from the UNFCCC and the Kyoto...

Ngày tải lên: 03/07/2014, 13:20

... decrease in net primary productivity in old- growth forests if it occurs is related more to decreasing photosynthesis in old and tall trees (as well as in old- growth forest canopies) than to increasing respiratory ... shifts compen- sated each other such that relative growth rates were similar across the shade- tolerance gradient, while our results suggest higher growth rates f...

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... of these successions, 20 1- to 400-year -old stands (early old- growth) are either carbon-neutral or still accumulating carbon. Few successions exhibited a pronounced late-successional decline. ... progressing from early- to late-successional conifers, and from early-successional hardwoods to late-successional conifers, tended to accumu- late carbon during the early old- growth ph...

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... differ between second -growth and old- growth forests, in boreal (Aubin et al. 200 0), northern temperate deciduous (Angers et al. 200 5), and tropical (Montgomery and Chazdon 200 1) forests. Old- growth forests ... Comparisons with second -growth forests are also often made to highlight the uniqueness of old- growth forests. 6.2 Structural and Compositional Features of...

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... (Paw et al. 200 4), a 25 0- yearold ponderosa pine site in Oregon (Law et al. 200 1), a 300-year old Nothofagus site in New Zealand (Hollinger et al. 1994), and 20 0- to 250-year old boreal forests (Roser ... large. Further- more, old- growth forests may continue to accumulate carbon and hence act as carbon sinks. Currently, old- growth forests do not have to be repo...

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... al. (eds.), Old Growth Forests, Ecological Studies 207 , 411 DOI: 10.1007/978‐3 ‐540‐ 92706‐8 18, # Springer Verlag Berlin Heidelberg 200 9 year between 1990 and 200 5 (non-intact forests have been ... conversion rates between intact forests, non-intact forests and non- forests during the time period from 1990 to 200 5, we used FAO net change figures (FAO 200 6). Intact and non...

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... interaction for the functioning and main- tenance of old- growth forests. Second, they take a closer look at the peculiarities of nitrogen dynamics in old- growth forests under the low levels of nitrogen ... protection of old- growth forests, and present an encouraging example. Finally, Grace and Meir (Chap. 17) close this part with a chapter on old- growth dynamics in globa...

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... young old- growth forests are 6 0- to 12 0- year -old oak stands (Laiolo et al. 200 3), a 100-year -old boreal Norway spruce stand (Dahlberg et al. 1997), and a 110-year -old Balsam fir stand (Sturtevant ... ‘majestic’ old- growth species in the north-western United States. Old- growth forest ages ranged from 50 to 1,150 years (Fig. 2.6). The youngest old- growth stand was a m...

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... Wirth Chapter 3 Old Trees and the Meaning of Old Fritz Hans Schweingruber and Christian Wir th 3.1 Introduction While the mere presence of old trees does not automatically indicate old- growth ... are generally shorter-lived than trees (Schweingruber 1995) and dwarf-shrubs (see below). The oldest known shrub s grow in Siberia. Hantemirov et al. (200 3) found an 840-year -old Juniperu...

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... detritus in old- growth forests and then C. Wirth et al. (eds.), Old Growth Forests, Ecological Studies 207 , 159 DOI: 10.1007/978‐3‐540‐92706‐8 8, # Springer Verlag Berlin Heidelberg 200 9 are usually ... reduction in NPP or an increase in decom- position rate-constants as forests age could lead to mid-successional forests having more woody detritus than old- growth forest...

Ngày tải lên: 03/07/2014, 13:20