Consequences of inferring diet from feeding guilds when estimating and interpreting consumer-resource stoichiometry
Consequences of inferring diet from feeding guilds when estimating and interpreting consumer-resource stoichiometry
复制标题
在估计和解释消费者资源化学计量时从饲养协会推断饮食的后果
DOI：
10.1111/fwb.12361
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发表时间：
2014
影响因子：
2.7
通讯作者：
Lauridsen R
中科院分区：
文献类型：
--
作者：
Lauridsen R
资源要素的供应与消费者的需求之间的不平衡可能会制约增长和生产等关键的生态进程。大多数以前的研究估计消费者和资源之间的这种化学计量不平衡，从功能分类推断前者的饮食，而不是直接评估饮食。然而，这并不允许消费者对有限的元素资源供应产生潜在的可塑性反应。在这里，对于三种截然不同的营养物质可利用性，我们使用来自经验肠道内容物分析的饮食计算了消费者和资源之间的元素失衡，并将其与相关物种的功能性摄食公会推断的结果进行了比较。几乎在所有情况下，元素失衡（C：P和N：P）的基础上实现的饮食显着不同的预期从推断的饮食，前者揭示更大的一致性之间的元素组成的消费者和他们的资源，特别是P.简单地推断的饮食，因为通常这样做，导致错误的估计元素的不平衡和误导性的结论对消费者的化学计量限制。
Imbalances between the supply of elements from resources and their demand from consumers may constrain key ecological processes, such as growth and production. Most previous studies have estimated such stoichiometric imbalances between consumers and resources by inferring the diet of the former from functional classifications rather than by direct assessments of the diet. However, this does not allow for potentially plastic responses of consumers to a restricted supply of elemental resources.Here, for three streams of very contrasting nutrient availability, we calculated elemental imbalances between consumers and resources using diets derived from empirical gut contents analysis and compared them with those inferred for the functional feeding guilds of the species concerned.In almost every case, elemental imbalances (C:P and N:P) based on the realised diet differed significantly from those expected from the inferred diet, the former revealing greater alignment between the elemental composition of consumers and their resources, particularly for P.Simply inferring the diet, as is commonly done, results in erroneous estimates of elemental imbalances and misleading conclusions about stoichiometric constraints on consumers.