Decomposition in salt marsh ecosystems: phenolic dynamics during decay of litter of Spartina alterniflora
Decomposition in salt marsh ecosystems: phenolic dynamics during decay of litter of Spartina alterniflora
复制标题
盐沼生态系统中的分解：互花米草凋落物腐烂过程中的酚类动态
DOI：
10.3354/meps029177
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发表时间：
1986
影响因子：
2.5
通讯作者：
T. Swain
中科院分区：
文献类型：
--
作者：
J. O. Wilson;R. Buchsbaum;I. Valiela;T. Swain
损失的重量和浓度的变化，可溶性酚类化合物，结合酚类化合物，木质素，和细胞壁材料，随后超过2年的腐烂在4种类型的互花米草凋落物。在第一个月的重量损失的模式显示快速沥滤，在第一年的温度依赖性衰减，并在第二年的进一步损失不大。可溶性酚类物质在整个分解过程中损失。最初，一些可溶性酚类物质可能会成为附着在细胞壁，绝对增加绑定酚类观察到在低沼泽凋落物在第2周的腐烂。木质素损失率最慢的凋落物材料和腐烂过程中的相对浓度增加。凋落物质量的种内差异很小，并没有改变4种类型的凋落物之间的分解模式。然而，在腐烂过程中凋落物的化学成分的变化，主要控制腐烂率在第二和第三阶段的分解。降低失重与增加木质素和氮含量相关。氮的增加可能反映了难熔富氮复合物的合成。随着腐烂的继续，凋落物逐渐丰富的柠檬酸木质素和富氮复合物和有机质的进一步损失很少发生。
Loss of weight and change in concentration of soluble phenolics, bound phenolics, lignins, and cell wall material were followed over 2 yr of decay in 4 types of litter of Spartina alterniflora. The pattern of weight loss showed rapid leaching during the first month, temperaturedependent decay during the first year, and little further loss during the second year. Soluble phenolics were lost throughout decomposition. Initially some soluble phenolics may become attached to cell walls; absolute increases in bound phenolics were observed in low marsh litters during the first 2 wk of decay. Lignins were lost at the slowest rate from litter material and increased in relative concentration during decay. Intraspecific differences in litter quality were small, and did not alter the pattern of decomposition among the 4 types of litter. Changes in chemical composition of litter during decay, however, were major controls of decay rates during the second and third phases of decomposition. Decreasing weight loss correlated with increasing lignin and nitrogen content. The increase in nitrogen presumably reflected synthesis of refractory nitrogen-enriched complexes. As decay continued, the litter became progressively enriched in recalcitrant lignin and nitrogen-enriched complexes and little further loss of organic matter occurred.