How many predator guts are required to predict trophic interactions?
How many predator guts are required to predict trophic interactions?
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需要多少捕食者的内脏才能预测营养相互作用？
DOI：
10.1016/j.fooweb.2022.e00269
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发表时间：
2023
期刊：
影响因子：
1.7
通讯作者：
Gupta A
中科院分区：
文献类型：
--
作者：
Gupta A
1)食物网生态中的一大障碍是利用个体捕食者的内脏来充分描述食物网的结构所需的时间和精力。食物网模型，如异速生长食物宽度模型(ADBM)，可以通过基于易于测量的特征(如生物体的大小)来预测相互作用，从而绕过这个问题。然而，食物数据，如来自捕食者肠道分析的数据，仍然需要对这些食物网络模型进行参数化，从现场收集和分析这些数据是一项昂贵而耗时的任务。因此，重要的是知道需要多少捕食者的肠道来参数化食物网模型以获得高准确度和精确度的食物网结构。2)在这里，我们探索七个特征特别好的食物网，并确定使用ADBM准确预测其结构所需的捕食者肠道的最小数量。我们使用贝叶斯计算对ADBM进行参数化，并使用真技能统计来衡量拟合优度，并且在改变参数化中使用的捕食者肠道的数量以测试采样努力的效果的情况下这样做。3)我们发现可以用来对ADBM进行参数化的捕食者肠道相对较少，甚至比实际收集的更少。捕食者内脏的最低数量是可用捕食者内脏数量的27%。准确描述食物网特征所需的捕食者内脏的数量增加了∼7±2.2个内脏，营养连接的数量增加了10个单位，物种数量增加了一个单位，∼增加了9±4.7个内脏。4)这些结果表明，人们不需要收集和分析如此大量的捕食者内脏来充分预测食物网的结构，从而大大减少了抽样工作量，而对预测的精确度或准确度几乎没有影响。
1)A large obstacle in food web ecology is the time and effort required to adequately describe the structure of a food web using individual predator guts. Food web models such as the allometric diet breadth model (ADBM) can be used to circumvent this problem by predicting the interactions based on easily measured characteristics, such as the size of organisms. However, diet data such as that which comes from analysis of predator guts is still required to parameterise these food web models, and collecting and analysing these data from the field is an expensive and time-consuming task. Therefore, it is important to know how many predator guts are required to parameterise food web models to obtain food web structures with high accuracy and precision.2)Here, we explore seven exceptionally well-characterised food webs and determine the minimum number of predator guts needed to accurately predict their structure using the ADBM. We use Bayesian computation to parameterise the ADBM, and true skill statistics to measure the goodness of fit, and do so while varying the number of predator guts used in the parameterisation to test the effect of sampling effort.3)We found that relatively few, and many fewer than were actually collected, predator guts can be used to parameterise the ADBM. The lowest number of predator guts was 27% of the number of available predator guts. The number of predator guts required to accurately characterise food webs increases by ∼ 7 ±2.2 guts for 10 units increase in the number of trophic links and ∼ 9 ±4.7 guts for a unit increase in the number of species.4)These results suggest that one need not collect and analyse such a large quantity of predator guts in order to adequately predict the structure of a food web, thereby reducing sampling effort considerably, while having little effect on precision or accuracy of predictions.
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DOI：
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影响因子：
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