Spatial pattern and uncertainty of soil organic carbon and implications for sampling design
Woody encroachment has occurred in many arid and semi‐arid ecosystems all over the world ( Archer 1995).Invasion of woody plants into grassland savanna has significant impacts on soil carbon storage and its spatial heterogeneity (Boutton et al.1998).We have limited understanding on the pattern of special heterogeneity and uncertainty of soil carbon and its relationship to the spatial pattern of woody vegetation in savanna landscapes.This understanding is essential for effective assessment and monitoring of soil carbon in savanna landscapes.The goal of this study was to develop an understanding of the spatial pattern and uncertainty of soil organic carbon ( SOC) and how they influence the effectiveness of SOC estimation in subtropical savanna landscapes.The specific objectives were to:(1) quantify the spatial uncertainty of SOC;(2) evaluate the performance of different point sampling designs in estimating SOC storage;and (3) develop effective sampling strategies based on the spatial pattern and uncertainty of SOC.
sampling design soil carbon storage spatial heterogeneity and uncertainty woody invasion
Feng Liu Xinyuan Ben Wu E Bai Thomas W.Boutton Steven R.Archer
Department of EcosysteMScience and Management,Texas A & M University,College Station,TX 77843,USA School of Natural Resources,University of A rizona,Tucson,A Z 85721,USA
国际会议
呼和浩特
英文
2008-06-29（万方平台首次上网日期，不代表论文的发表时间）