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首页> 外文期刊>Nitrogen >Tea Bags—Standard Materials for Testing Impacts of Nitrogen Addition on Litter Decomposition in Aquatic Ecosystems?
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Tea Bags—Standard Materials for Testing Impacts of Nitrogen Addition on Litter Decomposition in Aquatic Ecosystems?

机译：茶袋 - 用于测试氮气添加对水生生态系统凋落物分解的影响的标准材料吗？

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How the anthropogenic addition of nutrients, especially nitrogen (N), impacts litter decomposition has attracted extensive attention, but how environmental factors other than nutrients affect the impacts of N addition on litter decomposition is less understood. Since different local litters could respond differently to N addition, standard materials are necessary for comparing the impacts among various environments. The present study tested if tea bags used for the Tea Bag Index (TBI) approach, i.e., constructing an asymptote model by using a green tea decomposition datum and a rooibos tea decomposition datum (single measurement in time), can be standard materials for testing the impacts of N addition on litter decomposition in aquatic ecosystems. A laboratory incubation experiment was performed using a water sample taken from a stream in Kumamoto, Japan. Since a recent study suggested that the TBI approach may be inapplicable to aquatic ecosystems, a time-series data approach, i.e., fitting models to time-series mass loss data of tea bags, was also used for testing if tea bag decomposition can pick up the impacts of N addition on aquatic litter decomposition. The time-series data approach demonstrated that N addition significantly suppressed rooibos tea decomposition, whereas green tea decomposition was not affected by N addition. The TBI approach was unsuitable for testing the sensitivity of the response of tea bag decomposition to N addition because the TBI-based asymptote model failed to predict the observed data, confirming the suggestion by a previous study. Overall, the present study suggested that the tea bags can be used as standard materials for testing the impacts of N addition on litter decomposition in aquatic ecosystems, but only when using a time-series measurement and not the TBI.
机译：如何如何添加营养素，尤其是氮气（n），影响凋落物分解引起了广泛的关注，但营养素以外的环境因素如何影响N添加对垃圾分解的影响。由于不同的本地窝可以不同地响应N添加，因此需要标准材料来比较各种环境之间的影响。目前的研究测试了用于茶袋指数（TBI）方法的茶袋，即通过使用绿茶分解基准和rooibos茶分解基准（单点测量）构建渐近模型，可以是用于测试的标准材料n添加对水生生态系统凋落物分解的影响。使用从日本熊本群中的溪流取出的水样品进行实验室孵育实验。由于最近的一项研究表明，TBI方法可能不适用于水生生态系统，所以时间序列数据方法，即拟合模型到茶袋的时序质量损失数据，也用于测试茶袋分解是否可以接收N添加对水生凋落物分解的影响。时间序列数据方法表明，N添加显着抑制了罗的茶茶分解，而绿茶分解不受不影响N添加的影响。 TBI方法不适合测试茶袋分解的响应的敏感性，因为基于TBI的渐近模型未能预测观察到的数据，确认先前的研究的建议。总体而言，本研究表明，茶叶袋可用作测试水生态系统中凋落物分解的N添加的标准材料，但仅在使用时间序列测量而不是TBI时。

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