量化河岸掠食者对蓝色、绿色和棕色资源的利用:氨基酸同位素和脂肪酸的综合利用

IF 6.3 2区 环境科学与生态学 Q1 ECOLOGY
Grégoire Saboret, Bastiaan J. W. Drost, Carmen Kowarik, Carsten J. Schubert, Martin M. Gossner, Maja Ilić
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引用次数: 0

摘要

全球变化驱动着生物多样性的多个方面,包括对生态系统功能至关重要的相互作用多样性。然而,在元生态系统(即由能量、物质和生物跨生态系统边界的空间流连接起来的生态系统)中研究营养互作具有挑战性。虽然基于多不饱和脂肪酸(PUFAs)丰度和氨基酸(AAs)稳定同位素的分析方法正被越来越多地使用,但这两种方法是否可以:(i)结合到混合模型中以提高膳食推断的精确度(ii)进行比较以区分野生食物网中各种多不饱和脂肪酸和蛋白质的转移,却从未被探索过。我们探讨了基于 PUFA 丰度和 AA 同位素的分析方法在解决自然河岸食物网中资源转移问题上的实用性。我们将重点放在蜘蛛及其来自蓝色、绿色和棕色资源的潜在猎物上,以解决食物网生态学中三个重要且长期存在的方法学问题,即:(i) 必需 AA 碳同位素是否能确定蛋白质来源于蓝色、绿色和棕色资源;(ii) PUFA 相对丰度和 AA 同位素是否能在混合模型中结合使用,以提供更高精度的估计值(即更窄的区间);(iii) 将这两种方法结合使用是否能揭示食物网中蛋白质和 PUFA 转移的耦合关系。我们的研究证明了 AA 同位素和 PUFAs 在区分蓝色、绿色和棕色来源及其向消费者转移方面的能力。我们的研究表明,将 PUFA 相对丰度和 AA 同位素结合到一个混合模型中,可以得到与单个估计值相似的总体估计值,但精度会显著提高。此外,我们还展示了综合方法如何揭示蛋白质和 PUFA 转移的耦合关系。例如,我们发现相对于蛋白质而言,大多数 PUFAs 在从猎物到捕食者之间的集中度较低,这突出表明 PUFAs 和蛋白质在食物链中的转移是不耦合的。我们首次展示了将 AA 同位素和 PUFA 丰度结合起来的有效性,这与元生态系统背景下复杂的营养相互作用尤为相关。我们的研究说明了蛋白质和 PUFA 的营养解耦,突出了将这两种方法结合起来的必要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Quantifying the utilisation of blue, green and brown resources by riparian predators: A combined use of amino acid isotopes and fatty acids

Quantifying the utilisation of blue, green and brown resources by riparian predators: A combined use of amino acid isotopes and fatty acids

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来源期刊
CiteScore
11.60
自引率
3.00%
发文量
236
审稿时长
4-8 weeks
期刊介绍: A British Ecological Society journal, Methods in Ecology and Evolution (MEE) promotes the development of new methods in ecology and evolution, and facilitates their dissemination and uptake by the research community. MEE brings together papers from previously disparate sub-disciplines to provide a single forum for tracking methodological developments in all areas. MEE publishes methodological papers in any area of ecology and evolution, including: -Phylogenetic analysis -Statistical methods -Conservation & management -Theoretical methods -Practical methods, including lab and field -This list is not exhaustive, and we welcome enquiries about possible submissions. Methods are defined in the widest terms and may be analytical, practical or conceptual. A primary aim of the journal is to maximise the uptake of techniques by the community. We recognise that a major stumbling block in the uptake and application of new methods is the accessibility of methods. For example, users may need computer code, example applications or demonstrations of methods.
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