Revealing cryptic interactions between large mammalian herbivores and plant-dwelling arthropods via DNA metabarcoding.
Revealing cryptic interactions between large mammalian herbivores and plant-dwelling arthropods via DNA metabarcoding.
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在过去的十年里，杂食性动物在自然和农业系统中的重要性已经变得很明显，杂食性动物以不止一个营养水平为食。大型哺乳动物食草动物(LMH)经常在它们的食物植物上遇到植物栖息的节肢动物(PDA)。然而，LMH对PDA的摄取很少被解决，这种直接的营养相互作用的程度，特别是在PDA群落水平上，仍然未知。利用对大量和中度放牧围场重复的野外实验中自由放牧牛的粪便进行DNA代谢编码分析，我们揭示了喂牛(顺便)摄取了包括食草动物、捕食者和寄生虫在内的整个PDA食物链。总体而言，25个科的昆虫和4个科的蜘蛛纲动物被摄取，这种模式随着季节的变化而变化，但不随放牧强度而变化。我们确定了PDA易被摄取的功能基团，如固着种和未成熟生活期。大多数粪便样本(76%)含有属于PDA的序列，表明直接相互作用频繁。这项研究强调了LMH和PDA之间复杂的营养联系。甚至可以将LMH视为PDA的杂食性敌人。
In the past decade, it has become clear that omnivory, feeding on more than one trophic level, is important in natural and agricultural systems. Large mammalian herbivores (LMH) frequently encounter plant‐dwelling arthropods (PDA) on their food plants. Yet, ingestion of PDA by LMH is only rarely addressed and the extent of this direct trophic interaction, especially at the PDA community level, remains unknown. Using a DNA‐metabarcoding analysis on feces of free‐ranging cattle from a replicated field experiment of heavily and moderately grazed paddocks, we reveal that feeding cattle (incidentally) ingest an entire food chain of PDA including herbivores, predators and parasites. Overall, 25 families of insects and four families of arachnids were ingested, a pattern that varied over the season, but not with grazing intensity. We identified the functional groups of PDA vulnerable to ingestion, such as sessile species and immature life stages. Most of the fecal samples (76%) contained sequences belonging to PDA, indicating that direct interactions are frequent. This study highlights the complex trophic connections between LMH and PDA. It may even be appropriate to consider LMH as omnivorous enemies of PDA.
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影响因子：
48
作者：
Callahan BJ;McMurdie PJ;Rosen MJ;Han AW;Johnson AJ;Holmes SP
通讯作者：
Holmes SP
影响因子：
4.9
作者：
Deagle BE;Thomas AC;McInnes JC;Clarke LJ;Vesterinen EJ;Clare EL;Kartzinel TR;Eveson JP
通讯作者：
Eveson JP
影响因子：
1.4
作者：
Berman, T. S.;Glasser, T. A.;Inbar, M.
通讯作者：
Inbar, M.
影响因子：
3.5
作者：
Berman, Tali S.;Messeri, Noa;Inbar, Moshe
通讯作者：
Inbar, Moshe
影响因子：
4.3
作者：
Huson DH;Beier S;Flade I;Górska A;El-Hadidi M;Mitra S;Ruscheweyh HJ;Tappu R
通讯作者：
Tappu R