DECOMPOSITION OF SILVER MAPLE (ACER-SACCHARINUM L) WOODY DEBRIS IN A CENTRAL ILLINOIS BOTTOMLAND FOREST

被引：24

作者：

CHUENG, N ^{[1
]}

BROWN, S ^{[1
]}

机构：

[1] UNIV ILLINOIS,DEPT FORESTRY,URBANA,IL 61801

来源：

WETLANDS | 1995年 / 15卷 / 03期

关键词：

FORESTED WETLANDS; WOOD DECOMPOSITION; NUTRIENT COMPOSITION; DECOMPOSITION RATE; SILVER MAPLE; ACER SACCHARINUM L;

D O I：

10.1007/BF03160703

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The decomposition rate of silver maple (Acer saccharinum) woody debris was measured in a seasonally flooded mature wetland forest in central Illinois. Small diameter woody debris logs (5-cm diameter x 0.75-m long) of three successive decomposition classes (fresh, intermediate, and rotten) were placed in the floodplain for a period of 1.5 years. By incorporating a chronosequential design that extended the time frame to about 3.5 yr, the decomposition coefficient (k) of sample logs was estimated at 0.089 yr(-1) with a half-life of 7.8 years. Mass loss by microbial activity and leaching was estimated at 90%, whereas fragmentation accounted for 10%. Nutrient analysis of the logs indicated that P and K seemed to be released, whereas N, Ca, and Mg were immobilized. Overall, Ca and N were found in significantly higher concentrations than other nutrients (Ca>N>>K>Mg>P). Because small diameter woody debris has limited quantities of nutrients and a long residence time, its role in this mature forested wetland does not seem to be a nutrient reservoir but rather a long-term organic matter storage pool.

引用

页码：232 / 241

页数：10

共 32 条

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