2023
DOI: 10.1002/lno.12467
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Trophic plasticity of omnivorous fishes in natural and human‐dominated landscapes

Mayara Pereira Neves,
Rosilene Luciana Delariva,
Daniel M. Perkins
et al.

Abstract: The persistence of diverse communities and functioning ecosystems under increasing anthropogenic pressure relies on food web rewiring and the ability of animals to expand or change their diet in disturbed ecosystems. We combined a suite of diet tracing techniques to study trophic plasticity in omnivorous fishes, ecomorphologically similar species with high competition potential, across different human land uses in subtropical streams. We found that the proportion of native forest cover, associated with intensi… Show more

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Cited by 6 publications
(9 citation statements)
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“…These two mechanisms critically depend on the maintenance of local and regional biodiversity in tropical streams, which is known to be strongly affected by human land use intensifications from forests to monoculture plantations in different ways (Neves et al, 2023;Siqueira et al, 2015). Therefore, an urgent challenge is to understand how the systematic loss of diversity jeopardizes the stability of stream food webs under human impacts and what could be the consequences for a sustainable use of resources.…”
Section: Discussionmentioning
confidence: 99%
“…These two mechanisms critically depend on the maintenance of local and regional biodiversity in tropical streams, which is known to be strongly affected by human land use intensifications from forests to monoculture plantations in different ways (Neves et al, 2023;Siqueira et al, 2015). Therefore, an urgent challenge is to understand how the systematic loss of diversity jeopardizes the stability of stream food webs under human impacts and what could be the consequences for a sustainable use of resources.…”
Section: Discussionmentioning
confidence: 99%
“…Although the trophic ecology of these species has been extensively studied (Bonato et al, 2018;Delariva & Neves, 2020;Neves et al, 2023;Pini et al, 2019), we still know little about the histological characteristics of their digestive tract and how these traits are related to food ingestion, digestion, absorption, and assimilation. Moreover, recent stable isotope analyses indicate that while tetra fishes readily ingest plant food items, they rarely assimilate or incorporate these types of food into their tissues (Bonato et al, 2018;Neves et al, 2021Neves et al, , 2023. This finding raises questions about the role of plant material in the diets of tetra fishes.…”
Section: Introductionmentioning
confidence: 99%
“…In this study, we explored the relationships among morphological characteristics of the digestive tract, food intake, isotopic composition, and resource assimilation of three native omnivorous fish spe- (Neves et al, 2023). Consequently, our study aimed to accomplish the following objectives: (i) describe the anatomical, histological, and histochemical traits of the digestive tract and diet of these small tetra fishes; (ii) investigate the potential relationship between intestine length, diet, and isotopic composition given their omnivorous feeding habit; and (iii) test the hypothesis that variations in the digestive tract among the species correspond to differences in resource utilization (animal and plant food items), isotopic composition, and assimilation.…”
Section: Introductionmentioning
confidence: 99%
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