The conversion of native savannah into pasturelands does not affect exclusively species diversity: Effects on physiological condition of a highly abundant dung beetle species,Ecology and Evolution

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The conversion of native savannah into pasturelands does not affect exclusively species diversity: Effects on physiological condition of a highly abundant dung beetle species
Ecology and Evolution ( IF 2.3 ) Pub Date : 2023-11-20 , DOI: 10.1002/ece3.10752
César M A Correa ₁ , Kalel Caetano da Silva _{1,

2} , Pedro Lucas Moreira de Oliveira _{1,

2} , Renato Portela Salomão _{3,

4}

Affiliation

Dung beetles are efficient indicators to obtain responses regarding the effects of land use change on biodiversity. Although the biological consequences of Cerrado conversion into pasture have been observed at the assemblage scale, there are no cues regarding the effects of tropical savanna conversion into pasture on physiological condition of dung beetle individuals. In this study, we evaluated whether native and non-native habitats in Cerrado affect the physiological condition and body traits of males and females of Phanaeus palaeno. The individuals were collected from a Cerrado fragment (sensu stricto) and an exotic pasture (Urochloa spp.). Physiological condition was assessed through the estimation of individuals' dry body mass, fat mass, and muscle mass. Body traits were estimated through individual body size and males' horn length. We did not find differences between dung beetle morphological traits between Cerrado and pastures. However, individuals collected in exotic pastures had lower dry mass and fat mass, but higher muscle mass, than in conserved Cerrado. Understanding how the land use change affects individuals' body condition is essential to maintain abundant and healthy populations of dung beetles in human-modified landscapes. Although the estimation of physiological condition is logistically more complex than species body traits, future studies aiming to present complex and finer ecological responses of dung beetles should incorporate physiological data to their approaches.

中文翻译：

将本地稀树草原转变为牧场并不仅仅影响物种多样性：对高度丰富的蜣螂物种生理状况的影响

蜣螂是获得有关土地利用变化对生物多样性影响的反应的有效指标。尽管在组合规模上观察到了 Cerrado 转化为牧场的生物学后果，但没有关于热带稀树草原转化为牧场对蜣螂个体生理状况影响的线索。在这项研究中，我们评估了 Cerrado 的本地和非本地栖息地是否影响 Phanaeus palaeno 雄性和雌性的生理状况和身体特征。这些个体是从 Cerrado 片段（sensu stricto）和异国情调的牧场（Urochloa spp.）收集的。通过估计个体的干体重、脂肪量和肌肉量来评估生理状况。通过个体体型和雄性角长来估计身体特征。我们没有发现 Cerrado 和牧场之间的蜣螂形态特征之间存在差异。然而，与保存的 Cerrado 相比，在外来牧场收集的个体的干质量和脂肪量较低，但肌肉量较高。了解土地利用变化如何影响个体的身体状况，对于在人类改造的景观中保持丰富和健康的蜣螂种群至关重要。尽管生理状况的估计在逻辑上比物种体性状更复杂，但旨在呈现蜣螂复杂和精细生态反应的未来研究应将生理数据纳入他们的方法。

更新日期：2023-11-23

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