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Title: Biomass and carbon pools of disturbed riparian forests

Author: Giese, Laura A.B.; Aust, W.M.; Kolka, Randall K.; Trettin, Carl C.

Date: 2003

Source: Forest Ecology and Management 180: 493-508

Publication Series: Not categorized

Description: Quantification of carbon pools as affected by forest ageldevelopment can facilitate riparian restoration and increase awareness of the potential for forests to sequester global carbon. Riparian forest biomass and carbon pools were quantified for four riparian forests representing different sera1 stages in the South Carolina Upper Coastal Plain. Three of the riparian forests were recovering from disturbance (thermal pollution), whereas the fourth represents a mature, relatively undisturbed riparian forest. Above and belowground carbon pools were determined from linear transects established perpendicular to the main stream channels and spanning the width of the riparian area. The objective of this study was to quantify the biomass and carbon pools in severely disturbed, early successional bottomland hardwood riparian forests and to compare these values to those of a less disturbed, mature riparian forest. Aboveground biomass in all four riparian forests increased during the 2.5-year investigation period. The total carbon pool in these South Carolina Coastal Plain riparian forests increased with forest age/development due to greater tree and soil carbon pools. The mature riparian forest stored approximately four times more carbon than the younger stands. The importance of the herbaceous biomass layer and carbon pool declined relative to total aboveground biomass with increasing forest age. As stands grew older fine root biomass increased, but a11 inverse relationship existed between percentages of fine root biomass to total biomass. The root carbon pool increased with forest ageldevelopment due to a combination of greater fine root biomass and higher root percent carbon. Aboveground net prilnary production (NPP) in young riparian forests rapidly approached and exceeded NPP of the more mature riparian forest. As a woody overstory became established (after ~8-10 years) annual litterfall rate as a function of NPP was independent of forest age and litterfall amount in the young riparian forests was comparable to mature riparian forests. Biomass in the riparian forest floor and carbon pool declined with increasing riparian forest development. Woody debris in these riparian forests comprised a relatively small carbon pool. An understanding of bottomland hardwood riparian forest carbon pools at different stages of succession allows us to assess how time since disturbance influences these pools, leading to a better understanding of the recovery processes.

Keywords: Bottomland hardwoods, carbon, riparian, succession

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  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

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Giese, Laura A.B.; Aust, W.M.; Kolka, Randall K.; Trettin, Carl C. 2003. Biomass and carbon pools of disturbed riparian forests. Forest Ecology and Management 180: 493-508

 


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