Human activities are significantly modifying the natural global carbon (C) cycles, and concomitantly influence climate, ecosystems, and state and function of the Earth system. Ever increasing amounts of carbon dioxide (CO2) are added to the atmosphere by fossil fuel combustion but the biosphere is a potential C sink. Thus, a comprehensive understanding of C cycling in the biosphere is crucial for identifying and managing biospheric C sinks. Ecosystems with large C stocks which must be protected and sustainably managed are wetlands, peatlands, tropical rainforests, tropical savannas, grasslands, degraded/desertified lands, agricultural lands, and urban lands. However, land-based sinks require long-term management and a protection strategy because C stocks grow with a progressive improvement in ecosystem health.13.2 Conceptual diagram illustrating how past land management can lead to depletion of grassland soil C stocks due to practices that decrease carbon uptake relative to carbon losses (indicated by with of arrows in the upper part of theanbsp;...
|Title||:||Recarbonization of the Biosphere|
|Author||:||Rattan Lal, Klaus Lorenz, Reinhard F. Hüttl, Bernd Uwe Schneider, Joachim von Braun|
|Publisher||:||Springer Science & Business Media - 2012-03-28|