Global ETD Search

1	Carbon and Nutrient Dynamics of Downed Woody Debris in a Northern Hardwood Forest Rudz, Philip 10 December 2013 (has links) Downed woody debris (DWD) is a carbon-rich form of forest litter and plays a unique role in carbon and nutrient cycling. I present a novel modeling approach describing DWD decomposition and nutrient storage in a managed northern hardwood forest. The predicted half-life of DWD carbon was 7 years, less than previously observed in similar northern hardwood forests. A stage-based nutrient model indicated that harvest slash DWD was a net nitrogen and phosphorus sink for eight years following harvest and accumulated calcium during decay. Field observations of respiration and leaching supported model results with a respired C half-life of 8 years, while leached carbon export constituted 1.37% of the respired flux. DWD leachate carbon and nitrogen concentrations were 11× and 2× greater than from litter, respectively, and DWD leachate contributed disproportionately to soil C stocks. This work represents an expedient means of forecasting DWD abundance and partitioning carbon flux from DWD. downed woody debris modeling carbon wood decay wood respiration dissolved organic carbon leaching nitrogen hardwood forestry 0478
2	Carbon and Nutrient Dynamics of Downed Woody Debris in a Northern Hardwood Forest Rudz, Philip 10 December 2013 (has links) Downed woody debris (DWD) is a carbon-rich form of forest litter and plays a unique role in carbon and nutrient cycling. I present a novel modeling approach describing DWD decomposition and nutrient storage in a managed northern hardwood forest. The predicted half-life of DWD carbon was 7 years, less than previously observed in similar northern hardwood forests. A stage-based nutrient model indicated that harvest slash DWD was a net nitrogen and phosphorus sink for eight years following harvest and accumulated calcium during decay. Field observations of respiration and leaching supported model results with a respired C half-life of 8 years, while leached carbon export constituted 1.37% of the respired flux. DWD leachate carbon and nitrogen concentrations were 11× and 2× greater than from litter, respectively, and DWD leachate contributed disproportionately to soil C stocks. This work represents an expedient means of forecasting DWD abundance and partitioning carbon flux from DWD. downed woody debris modeling carbon wood decay wood respiration dissolved organic carbon leaching nitrogen hardwood forestry 0478
3	Carbon release from woody parts of trees along an elevation gradient in a tropical montane moist forest of Southern Ecuador / Kohlenstoffabgabe von verholzten Organen von Bäumen entlang eines Höhengradienten in einem tropischen Bergeregenwald in Süd-Ecuador Zach, Alexandra 30 April 2008 (has links) No description available. 580 Pflanzen (Botanik) Mathematics and Computer Science Stammatmung Grobwurzelatmung Infrarot-Analyse Temperatursensitivität der Atmung Wachstumsatmung Erhaltungsatmung Kohlenstoffbilanz Holzatmung stem respiration coarse root respiration infrared gas analysis temperature sensitivity of respiration carbon balance wood respiration 42

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