Dynamics of phosphorus and organic matter during leaf decomposition in a forest stream
Dynamics of phosphorus and organic matter during leaf decomposition in a forest stream
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森林溪流树叶分解过程中磷和有机物的动态
DOI：
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发表时间：
1980
期刊：
影响因子：
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通讯作者：
Jerry C. Meyer
中科院分区：
文献类型：
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作者：
J. Meyer;Jerry C. Meyer
在新罕布什尔的森林溪流贝尔布鲁克的六个地点，对树叶的分解速率和分解过程中叶片磷含量的变化进行了为期一年的跟踪研究。实验叶包包括糖枫、黄桦树和山毛榉树叶各3g，装在1毫米网袋中。在泥沙淤积大的地点，叶片腐烂速度最慢，在泥沙淤积小的地点，叶片腐烂速度最快。无脊椎动物的数量和生物量与腐烂率没有相关性。叶片磷含量在分解过程中增加，在泥沙淤积最大的地方增加最大。一条河流中的有机物损失可分为由于向下游出口而造成的损失和由于生物过程造成的损失。使用质量平衡方法获得的生物损失率估计值略低于使用实验叶包获得的估计值。
Leaf decomposition rates and changes in leaf phosphorus content during decomposition were followed for one year at six sites in Bear Brook, a forest stream in New Hampshire. Experimental leaf packs consisted of 3 g each of sugar maple, yellow birch, and beech leaves enclosed in 1 mm mesh bags. Leaf decay was slowest in sites where sediment deposition was high and most rapid in sites where sediment deposition was low. There was no correlation between decay rate and numbers or biomass of invertebrates. Leaf phosphorus content increased during decomposition, and the increase was greatest where sediment deposition was greatest. Organic matter losses from a stream can be partitioned into losses due to export downstream and losses due to biological processes. Estimates of biological loss rates obtained using a mass balance approach were slightly lower than estimates obtained using experimental leaf packs.