Preprints
Filtering by Subject: Life Sciences
Intergenerational plasticity aligns with temperature-dependent selection on offspring metabolic rates
Published: 2023-07-20
Subjects: Life Sciences
Metabolic rates are linked to key life history traits that are thought to set the pace of life and affect fitness, yet the role that parents may have in shaping the metabolism of their offspring to enhance survival remains unclear. Here, we investigated the effect of temperature (24 C or 30 C) and feeding frequency experienced by parent zebrafish (Danio rerio) on offspring phenotypes and early [...]
The evolutionary dynamics of plastic foraging and its ecological consequences: a resource-consumer model
Published: 2023-07-17
Subjects: Ecology and Evolutionary Biology, Life Sciences
Phenotypic plasticity has important ecological and evolutionary consequences. In particular, behavioural phenotypic plasticity such as plastic foraging (PF) by consumers, may enhance community stability. Yet little is known about the ecological conditions that favor the evolution of PF, and how the evolutionary dynamics of PF may modulate its effects on community stability. In order to address [...]
Recent human-bear conflicts in Northern Italy: a review, with considerations of future perspectives
Published: 2023-07-17
Subjects: Animal Sciences, Behavior and Ethology, Biodiversity, Biology, Life Sciences, Other Ecology and Evolutionary Biology, Population Biology, Zoology
The killing of a runner in Northern Italy by a brown bear (Ursus arctos arctos) and the subsequent investigation of such matter highlighted a Human-Wildlife Conflict (HWC) that has been present in Trentino since the introduction of bears for conservation during the Life Ursus Project. Such conflict may be exacerbated as both human and bear populations get bigger. In this paper, I summarize the [...]
Shall we all adopt, with no worries, the ‘within a configuration’ approach in geometric morphometrics? A comment on claims that the effect of the superimposition and sliding on shape data is “not an obstacle to analyses of integration and modularity”
Published: 2023-07-17
Subjects: Life Sciences
The study of modularity and integration using Procrustes geometric morphometrics has become a prominent approach in evolutionary developmental biology. A most popular method is the ‘within a configuration’ approach, often used in combination with ‘high density’ morphometric data (i.e., large numbers of landmarks and semilandmarks). In 2019, I realized that this approach violates a basic [...]
Fixation probability and fixation time under strong recurrent mutation
Published: 2023-07-16
Subjects: Evolution, Life Sciences
When the mutation rate is high and/or the population size is large, recurrent mutation can lead to multiple, independently generated copies of the same beneficial allele spreading through the population. However, classical analyses of fixation probability and time assume that the mutation rate is low and therefore, that fixation and extinction of a beneficial allele occur faster than the [...]
When indices disagree: facing conceptual and practical challenges
Published: 2023-07-16
Subjects: Life Sciences
Hypothesis testing requires meaningful ways to quantify relevant biological phenomena and account for alternative mechanisms that could explain the same pattern. Researchers combine experiments, statistics, and indices to account for these confounding mechanisms. Key concepts in ecology and evolution, like niche breadth or fitness, can be represented by several indices, which often provide [...]
Implications of adult sex ratios on natal dispersal in a cooperative breeder
Published: 2023-07-14
Subjects: Life Sciences
In cooperatively breeding species, sexually mature individuals may delay natal dispersal and become subordinates, helping a dominant pair raise offspring. To understand how cooperative breeding evolved, it is important to determine the mechanisms leading to delayed dispersal. Adult sex ratio (ASR) variation may affect dispersal through limiting breeding vacancies available to the more abundant [...]
The sugar kelp Saccharina latissima I: Recent advances in a changing climate
Published: 2023-07-13
Subjects: Life Sciences
Shifts in internal stem damage along a tropical precipitation gradient and implications for forest biomass estimation
Published: 2023-07-10
Subjects: Ecology and Evolutionary Biology, Life Sciences
Woody biomass is a large carbon store in terrestrial ecosystems. In calculating biomass, tree stems are assumed to be solid structures. However, decomposer agents such as microbes and insects target stem heartwood, causing internal wood decay which is poorly quantified. We investigated internal stem damage across five sites in tropical Australia along a precipitation gradient. We estimated the [...]
Reviewing the role of urbanisation in facilitating the introduction and establishment of Invasive Animal Species
Published: 2023-07-09
Subjects: Life Sciences
While urbanisation is often associated to a loss of biodiversity, non-native invasive animal species are strikingly successful in urban landscapes. As biological invasions are recognised to have detrimental environmental, social and economic impacts, extensive understanding of the interactions between invasive species and the abiotic and biotic environment is necessary for effective prevention [...]
Precipitation predictability drives evolution of drought tolerance in Papaver rhoeas
Published: 2023-07-06
Subjects: Life Sciences
Current climate change leads to an increase in the frequency and intensity of droughts and to a decreased precipitation predictability. The few studies investigating plant evolutionary responses to contrasting predictability regimes showed that intrinsic precipitation predictability shapes plant phenotypic variation, drives evolution of phenotypic plasticity, and can vary in strength and [...]
Extinction drives recent thermophilization but does not trigger homogenization in forest understory
Published: 2023-07-04
Subjects: Botany, Forest Sciences, Life Sciences, Terrestrial and Aquatic Ecology
The ongoing climate change is triggering plant community thermophilization. This selection process is ought to shift community composition toward species adapted to warmer climates but may also lead to biotic homogenization. The link between thermophilization and homogenization, and the community dynamics that drive them (colonization and extinction) remain unknow, but is critical for [...]
Prevalence and Potential Evolutionary Significance of Color Mutations in Freshwater Crayfish (Decapoda: Astacidea)
Published: 2023-07-03
Subjects: Life Sciences
Color mutations may lead to the evolution and diversification of color phenotypes in animals. However, much of the research on this topic has been conducted on vertebrates. Here, I compile records of color mutations in freshwater crayfish (Decapoda: Astacidea). I found color mutations to be surprisingly common, with 103 documented occurrences. The overwhelming majority of these mutations resulted [...]
Lipid Metabolism in Parasitoids and Parasitized Hosts
Published: 2023-06-30
Subjects: Biology, Ecology and Evolutionary Biology, Entomology, Life Sciences, Physiology
Parasitoids have an exceptional lifestyle where juvenile development is spent on or in a single host insect, but the adults are free-living. Unlike parasites, parasitoids always kill their host. How parasitoids use such a limiting resource, particularly lipids, is important for their chances to survive and reproduce. In part 1, we describe the parasitoid lifestyle, including typical developmental [...]
Shall we all adopt, with no worries, the ‘within a configuration’ approach in geometric morphometrics? A comment on claims that the effect of the superimposition and sliding on shape data is “not an obstacle to analyses of integration and modularity”
Published: 2023-06-30
Subjects: Life Sciences
The study of modularity and integration using Procrustes geometric morphometrics has become a prominent approach in evolutionary developmental biology. A most popular method is the ‘within a configuration’ approach, often used in combination with ‘high density’ morphometric data (i.e., large numbers of landmarks and semilandmarks). In 2019, I realized that this approach violates a basic [...]