tailieunhanh - Springer Old Growth Forests - Chapter 14

Chapter 14 Biomass Chronosequences of United States Forests: Implications for Carbon Storage and Forest Management Forest Management and Carbon Sequestration Forests account for a large fraction of the carbon stored in global soils and vegetation (Dixon et al. 1994). | Chapter 14 Biomass Chronosequences of United States Forests Implications for Carbon Storage and Forest Management Jeremy W. Lichstein Christian Wirth Henry S. Horn and Stephen W. Pacala Forest Management and Carbon Sequestration Forests account for a large fraction of the carbon stored in global soils and vegetation Dixon et al. 1994 . Accordingly considerable effort has been devoted to understanding the impact of land use and forest management on carbon sequestration and thus on climate change Harmon et al. 1990 Lugo and Brown 1992 Heath and Birdsey 1993 Dixon et al. 1994 Houghton et al. 1999 Caspersen et al. 2000 Fang et al. 2001 Pacala et al. 2001 Birdsey et al. 2006 . The optimal strategy for forest management aimed at carbon sequestration is controversial. On the one hand logging diminishes the pool of standing carbon and can result in a large net transfer of carbon to the atmosphere Harmon et al. 1990 Vitousek 1991 Schulze et al. 2000 Harmon 2001 Harmon and Marks 2002 . On the other hand if the harvested wood has a sufficiently long residence time or is used to offset fossil fuel emissions repeated harvest and regrowth can effectively sequester carbon Vitousek 1991 Marland and Marland 1992 Marland and Schlamadinger 1997 . For a given parcel of land the relative merits of plantation forestry vs old-growth protection or restoration depends in part on the late-successional carbon storage trajectory. Classical models of ecosystem development propose that live biomass density biomass per unit area increases over time to an asymptote Kira and Shidei 1967 Odum 1969 . In contrast reviews of biomass dynamics in the forest ecology literature tend to emphasize the variety of patterns that can ensue over the course of succession Peet 1981 1992 Shugart 1984 . In the context of forest management aimed at carbon sequestration of particular interest is the possibility that live biomass density may decline late in succession in some ecosystems Loucks 1970 Bormann and .