温带森林土壤双翅目昆虫的多样性、丰度及稳定同位素组成

IF 2.2 3区农林科学 Q3 ECOLOGY

Pedobiologia Pub Date : 2026-03-01 Epub Date: 2026-02-25 DOI:10.1016/j.pedobi.2026.151123

Dmitry D. Vinogradov , Marina G. Krivosheina , Ivan V. Sotnikov , Sergey M. Tsurikov , Andrey G. Zuev , Oksana L. Rozanova , Alexei V. Tiunov

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引用次数: 0

摘要

双翅目昆虫在森林生态系统中起着重要的作用。随着无翅幼虫在土壤和飞行图像中发育，它们代表了地下碎屑和地上食草食物网之间的重要联系。尽管如此，土栖双翅目的营养相互作用仍然知之甚少。本研究利用羽化陷阱追踪俄罗斯莫斯科附近3个温带林分土壤中羽化双翅目的多样性、丰度和生物量的季节变化，并测量了羽化双翅目碳氮稳定同位素组成（δ13C和δ15N值），以评估其营养地位。羽化陷阱的分类丰富度（88种）高于土壤样品热提取（41种），突出了陷阱在土壤相关双翅目研究中的有效性。测定了65种有翅蝇的稳定同位素组成，结果表明，样品的δ15N值范围很广（−1.6‰~ 17.0‰），反映了双翅目不同的营养生态位。值得注意的是，超过一半的新出现的双翅目生物量是由平均δ15N值超过典型土壤捕食者的科（中角目、奇足目和蜘蛛目）组成的。15N的富集可以归因于特定的食物来源，如真菌、腐肉和粪便，也可以归因于变态过程中的同位素变化。因此，新兴双翅目昆虫的上游通量带有特定的同位素信号，这在大多数土壤腐食动物和捕食者中是不典型的。在重建地下和地上食物网之间的营养联系时，应考虑到这一点。

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Diversity, abundance and stable isotope composition of winged Diptera (Insecta) emerging from temperate forest soil

Diptera (Insecta) play a significant role in forest ecosystems. With wingless larvae developing in soil and flying imagoes, they represent an important link between belowground detrital and aboveground grazing food webs. Despite this, trophic interactions of soil-dwelling Diptera remain poorly understood. In this study, we used emergence traps to follow seasonal changes in diversity, abundance and biomass of Diptera emerging from the soil in three temperate forest stands near Moscow, Russia and measured carbon and nitrogen stable isotope composition (δ¹³C and δ¹⁵N values) of emerging Diptera to assess their trophic positions. A greater taxonomic richness (88 species) was revealed by emergence traps compared to heat extraction of soil samples (41 species), highlighting the efficiency of traps in studying soil-associated Diptera. Stable isotope composition was measured for 65 species of winged flies and revealed a very broad range of δ¹⁵N values of individual samples (from −1.6‰ to 17.0‰) reflecting diverse trophic niches of Diptera. Notably, more than a half of the emerging dipteran biomass consisted of families with mean δ¹⁵N values exceeding typical δ¹⁵N values of soil predators (Mesostigmata, Chilopoda, and Araneae). The enrichment in ¹⁵N can be attributed either to specific dietary sources such as fungi, carrion, and dung, and to an isotopic shift during metamorphosis. Thus, the upstream flux of emerging Diptera carries a specific isotopic signal, untypical of most soil saprophages and predators. This should be taken into account in the reconstructions of the trophic links between belowground and aboveground food webs.

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来源期刊

Pedobiologia 环境科学-生态学

CiteScore

4.20

自引率

8.70%

发文量

审稿时长

64 days

期刊介绍： Pedobiologia publishes peer reviewed articles describing original work in the field of soil ecology, which includes the study of soil organisms and their interactions with factors in their biotic and abiotic environments. Analysis of biological structures, interactions, functions, and processes in soil is fundamental for understanding the dynamical nature of terrestrial ecosystems, a prerequisite for appropriate soil management. The scope of this journal consists of fundamental and applied aspects of soil ecology; key focal points include interactions among organisms in soil, organismal controls on soil processes, causes and consequences of soil biodiversity, and aboveground-belowground interactions. We publish: original research that tests clearly defined hypotheses addressing topics of current interest in soil ecology (including studies demonstrating nonsignificant effects); descriptions of novel methodological approaches, or evaluations of current approaches, that address a clear need in soil ecology research; innovative syntheses of the soil ecology literature, including metaanalyses, topical in depth reviews and short opinion/perspective pieces, and descriptions of original conceptual frameworks; and short notes reporting novel observations of ecological significance.