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首页> 外文期刊>Pakistan journal of botany >Weight loss and changes in organic, inorganic and chlorophyll contents in three species of seaweeds during decomposition
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Weight loss and changes in organic, inorganic and chlorophyll contents in three species of seaweeds during decomposition

机译：三种海藻分解过程中的失重和有机，无机和叶绿素含量的变化

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摘要

Seaweed species constitute an important component in the mangrove ecosystem in Pakistan and contribute to the primary production and food web. Decomposition rate of these most common species of seaweed viz., Enteromorpha intestinalis, E. clathrata and Ulva reticulata occurring in mangrove environment were estimated in the laboratory using nylon mesh bag. Each seaweed species was decomposed separately in nylon net bag (1 mm2mesh) and were placed in well aerated seawater tanks. Triplicate sample bags of each seaweed species were retrieved after 2, 5, 7, 14, and 30 days and treated for further analysis. Seaweeds decompose at significantly higher rate compared to mangroves. Time required for 50% weight loss (t50) was 2, 6 and 5 days for E. intestinalis, E. clathrata and U. reticulata, respectively. E. intestinalis appeared to decompose faster than the other two species. Concentration of total chlorophyll was initially high and decreases during decomposition with a concomitant increase in Phaeopigment (degraded form of chlorophyll). Two-way analysis of variance showed that concentration of total chlorophyll and weight loss depends on incubation period and each species had significantly different (p0.001) decomposition rates.
机译：海藻物种构成了巴基斯坦红树林生态系统的重要组成部分，并为初级生产和食物网做出了贡献。在实验室中使用尼龙网袋估算了这些最常见的海藻物种（肠小肠Enteromorpha intestinalis，E。clathrata和Ulva reticulata）的分解速率。将每种海藻种类分别在1毫米2目的尼龙网袋中分解，并放入充气好的海水缸中。在2、5、7、14和30天后取回每种海藻物种的一式三份样品袋，并进行进一步分析。与红树林相比，海藻的分解速度要高得多。 50％的体重减轻（t50）所需的时间分别是小肠埃希氏菌，克氏杆菌和网状沙门氏菌2、6和5天。小肠大肠杆菌似乎比其他两个物种分解得更快。总叶绿素浓度最初较高，在分解过程中降低，而叶绿素（叶绿素的降解形式）随之增加。双向方差分析表明，总叶绿素浓度和体重减轻取决于潜伏期，并且每个物种的分解速率均存在显着差异（p <0.001）。

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