dietr: an R package for calculating fractional trophic levels from quantitative and qualitative diet data
dietr: an R package for calculating fractional trophic levels from quantitative and qualitative diet data
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DOI：
10.1007/s10750-020-04417-5
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发表时间：
2020-10-09
期刊：
影响因子：
2.6
通讯作者：
Borstein, Samuel R.
中科院分区：
文献类型：
--
作者：
Borstein, Samuel R.
本文介绍了一个R软件包dietr，它根据开源R环境中TrophLab中实现的例程，从定量饮食项目和定性食物项目数据计算分数营养级。dietr易于使用，可以快速计算许多饮食记录的营养级。除了按照TrophLab例程计算营养级外，用户还可以指定分类层次结构，并在单个函数调用中估计多个分类级的营养级。此外，dietr可以很好地与使用rfishbase在R中获得的FishBase数据配合使用，并带有预先制作的猎物营养级数据库，用户可以利用这些数据库来估计营养级。我提供了关于dietr性能的信息，并提供了一个如何在经验数据集上使用dietr的用例示例。数百个标本的营养水平可以在几秒钟内计算出来，dietr输入的灵活性使用户可以很容易地从自己的数据计算营养水平。
This article introduces an R package,dietr, which calculates fractional trophic levels from quantitative diet item and qualitative food item data following the routine implemented inTrophLabwithin the open source R environment.dietris easy to use and can quickly calculate trophic levels for many diet records. In addition to calculating trophic levels following theTrophLabroutines, users can also specify a taxonomic hierarchy and estimate trophic levels at multiple taxonomic levels in a single call of a function. Additionally,dietrworks well with FishBase data obtained in R usingrfishbaseand comes with pre-made databases of prey trophic levels that users can utilize for estimating trophic levels.dietrcan also calculate several prey electivity indices. I provide information ondietr's performance and provide a use case example of howdietrcan be used on an empirical dataset. Trophic levels for hundreds of specimens can be calculated in a few seconds and the flexibility ofdietr's input allows users to easily calculate trophic levels from their own data.