2016•Journal of Fujian Agriculture and Forestry UniversityRequires access

Characteristics of woody debris in a natural secondary forest on Loess Plateau,China

Lingjia Gu

Abstract

Woody debris( WD) plays an indispensable role in ecosystem nutrient cycling and forest development. We studied the characteristics of WD in natural secondary Pinus tabulaeformis mixed stands in Huanglong Mountain,Loess Plateau. Results showed that:( 1) the gross reserve of WD of natural mixed forest was 10. 73 t·hm- 2,with 10. 31 t·hm- 2( 96. 09%) from coarse woody debris and 0. 42 t·hm- 2( 13. 91%) from fine woody debris. And coarse woody debris was mainly attributed to fallen trees;( 2)Exponential models indicated that decomposition density of WD was inversely proportional to decaying level;( 3) Woods at diameter of 20- 30 cm and 30- 40 cm were the main source of WD reserve in terms of quantity and proportion. To summerize,overall evaluation of WD in natural secondary forest provides insight into structural characteristics of wood in late succession stage of mixed forest development.

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Key concepts: Pinus tabulaeformis, Coarse woody debris, Debris, Snag, Loess plateau, Ecological succession, Environmental science, Plateau (mathematics)