Effects of visible light radiation on macrophyte litter degradation and nutrient release in water samples from a eutrophic shallow lake
Effects of visible light radiation on macrophyte litter degradation and nutrient release in water samples from a eutrophic shallow lake
复制标题
可见光辐射对富营养化浅湖水样中大型植物凋落物降解和养分释放的影响
DOI：
10.1080/02757540.2016.1203910
复制
发表时间：
2016-06
影响因子：
2.5
通讯作者：
Na Song
中科院分区：
文献类型：
--
作者：
Xin Liu;Qing-Hui Huang;He-Long Jiang;Na Song
摘要可见光是太阳光谱的主要组成部分;然而，缺乏有关大型植物碎屑可见光辐射的信息。在这项研究中，我们进行了一个微型宇宙实验，以评估可见光辐射对两种凋落物的降解的影响：眼子菜malaianus（P. malaianus）和芦苇australis（Ph. australis）。这项研究代表了在168天内释放的质量损失，微生物活性和营养物质的调查。可见光辐射对凋落物分解有显著影响，但对降解纤维素和木质素的微生物活性没有影响。处理中马来杨和芦苇3种组分的分解速率顺序为：纤维素>半纤维素>木质素。可见光辐射主要影响木质素的降解，木质素是凋落物中最易光降解的化合物。暴露于高达17.6 Wm−2的可见光辐射刺激了溶解的有机碳的释放，并降低了分子量，使其反应性降低。 不同可见光强度下，TP、TN、NO3-N、NO2-N和NH3-N含量差异不显著。本研究结果有助于更好地了解浅水湖泊中水生植物凋落物的光化学行为。
ABSTRACT Visible light is a major fraction of the solar spectrum; however, information on visible light radiation of macrophyte detritus is lacking. In this study, we conducted a microcosm experiment to assess the effects of visible light radiation on degradation of two litter species: Potamogeton malaianus (P. malaianus) and Phragmites australis (Ph. australis). This research represents an investigation of mass loss, microbial activity and nutrients released over a period of 168 days. Overall, we found that visible light radiation had significant effects on litter decomposition, but it did not affect the microbial activities which degrade cellulose and lignin. The decomposition rate order of the three components in P. malaianus and Ph. australis in treatments was: cellulose > hemicellulose > lignin. The visible light radiation mainly affected the degradation of lignin, which is the primary compound in litter susceptible to photodegradation. The exposure to visible light radiation up to 17.6 Wm−2 stimulated the dissolved organic carbon release and reduced the molecular weight to less reactive. Meanwhile, no obvious difference in nutrient contents (TP, TN, NO3–N, NO2–N, and NH3–N) was observed among different visible light intensities. The results of this study contribute to better understanding of the photochemical behaviour of macrophyte litter in shallow lakes.
登录
查看更多内容
影响因子：
2.7
作者：
Brothers, Soren M.;Hilt, Sabine;Koehler, Jan
通讯作者：
Koehler, Jan
影响因子：
11.4
作者：
Ververis, C.;Georghiou, K.;Corleti, V.
通讯作者：
Corleti, V.
影响因子：
4
作者：
Benner, Ronald;Kaiser, Karl
通讯作者：
Kaiser, Karl
DOI：
10.1007/978-1-4020-8555-0
发表时间：
2008
期刊：
--
影响因子：
--
作者：
B. Qin
通讯作者：
B. Qin
影响因子：
1.8
作者：
F. Rubio;C. Rojo;E. Núñez-Olivera;M. A. Rodrigo
通讯作者：
F. Rubio;C. Rojo;E. Núñez-Olivera;M. A. Rodrigo