What does this research mean for the field?

Dietary specialist herbivores exhibit a strong but insufficient genetic, microbial, and behavioral response to novel plant toxins compared to generalists, limiting their capacity to adapt to new dietary resources. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This study aims to explore how diet switching affects behavior, physiology, genetics, and microbial composition in two rodent herbivores.

June 21, 2026BMC BiologyOpen Access

Diet change reveals asymmetric response in gene expression and microbial composition across the digestive tract of two closely related herbivores

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Authors

DNDanny P. Nielsen MHMatthew L. Holding RCRobert E. del Carlo

Discussion

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Overview

Randomized trial reveals distinct gene and gut microbiome responses across herbivore diet strategies, highlighting adaptive potential.

Key Points

This study aims to explore how diet switching affects behavior, physiology, genetics, and microbial composition in two rodent herbivores.
Reciprocal laboratory feeding trials were conducted with wild-caught woodrats (genus Neotoma).
Woodrats were exposed to familiar and novel plant toxins, and changes in various parameters were measured.
Parameters included food and water intake, locomotor activity, gut microbial composition, and gene expression across the digestive tract.
The dietary generalist showed minimal response to the novel diet, while the dietary specialist exhibited significant changes.
The specialist increased water intake and reduced locomotor activity, alongside shifts in detoxification gene expression and gut microbiome.
The specialist's response, while pronounced, may not mitigate the fitness risks posed by novel dietary toxins.

Cite This Study

Nielsen et al. (2026) studied this question.

synapsesocial.com/papers/6a377fb224f042ddf4c59fa1 https://doi.org/10.1186/s12915-026-02658-9

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June 21, 2026BMC BiologyOpen Access

Diet change reveals asymmetric response in gene expression and microbial composition across the digestive tract of two closely related herbivores

View Full Paper

Ask AI

Bookmark

Authors

DNDanny P. Nielsen MHMatthew L. Holding RCRobert E. del Carlo

Discussion

Member takes

Overview

Randomized trial reveals distinct gene and gut microbiome responses across herbivore diet strategies, highlighting adaptive potential.

Key Points

This study aims to explore how diet switching affects behavior, physiology, genetics, and microbial composition in two rodent herbivores.
Reciprocal laboratory feeding trials were conducted with wild-caught woodrats (genus Neotoma).
Woodrats were exposed to familiar and novel plant toxins, and changes in various parameters were measured.
Parameters included food and water intake, locomotor activity, gut microbial composition, and gene expression across the digestive tract.
The dietary generalist showed minimal response to the novel diet, while the dietary specialist exhibited significant changes.
The specialist increased water intake and reduced locomotor activity, alongside shifts in detoxification gene expression and gut microbiome.
The specialist's response, while pronounced, may not mitigate the fitness risks posed by novel dietary toxins.

Cite This Study

Nielsen et al. (2026) studied this question.

synapsesocial.com/papers/6a377fb224f042ddf4c59fa1 https://doi.org/10.1186/s12915-026-02658-9

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