Marianne Mugabo

University of Leeds · Ecology and Evolution Group

Figure S1.1. Distributions of model evidence ratios. Figure S1.2. Scatterplots of colour coefficients of environmental time‐series estimated from the frequency and time‐domains. Figure S1.3. Proportions of coloured or white environmental covariates associated with animal classes. Figure S1.4. Number of points (years) needed to detect a specific...

The understanding of developmental patterns of body coloration is challenging because of the multicomponent nature of color signals and the multiple selective pressures acting upon them, which further depend on the sex of the bearer and area of display. Pigmentary colors are thought to be strongly involved in sexual selection, while structural colo...

AIM: The temporal structure (colour) of environmental variation influences population fluctuations, extinction risk and community stability. However, it is unclear whether environmental covariates linked to population fluctuations are distinguishable from a purely random process (white noise). We aim to estimate colour coefficients and relative su...

Negative density feedbacks have been extensively described in animal species and involve both consumptive (i.e. trophic interactions) and non-consumptive (i.e. social interactions) mechanisms. Glucocorticoids are a major component of the physiological stress response and homeostasis, and therefore make a good candidate for proximate determinants of...

Demographic rates are shaped by the interaction of past and current environments that individuals in a population experience. Past environments shape individual states via selection and plasticity, and fitness-related traits (e.g. individual size) are commonly used in demographic analyses to represent the effect of past environments on demographic...

Temperament traits are seen in many animal species, and recent evolutionary models predict that they could be maintained by heterogeneous selection. We tested this prediction by examining density-dependent selection in juvenile common lizards Zootoca vivipara scored for activity, boldness and sociability at birth and at the age of one year. We meas...

When effective immune defenses against parasites are costly and resources limited, individuals are expected to alter their investment in immunity in response to the risk of infection. As an ecological factor that can affect both food abundance and parasite exposure, host density can play an important role in host immunity and host-parasite interact...

Understanding the consequences of environmental change on both long- and short- term ecological and evolutionary dynamics is a basic pre-requisite for any effective conservation or management programme but inherently problematic because of the complex interplay between ecological and evolutionary processes. Components of such complexity have been d...

Small population dynamics depend importantly on the strength and shape of density dependence. Unfortunately, the lack of reliable life-history data often prevents to make accurate demographic predictions for populations regulated by density dependence. We created a gradient from low to high densities in small experimental populations of common liza...

Population structure influences importantly population growth rate and their ability to cope with environmental variations. Indeed, it determines the proportion of individuals who contribute to produce new generations as well as the intensity of competitive and cooperative social interactions. Using the common lizard (Zootoca vivipara, Jacquin 1787...

1. Understanding proximate determinants of predation rates is a central question in ecology. Studies often use functional response (density dependent) or allometric (mass dependent) models but approaches that consider multiple factors are critical to capture the complexity in predator–prey interactions. We present a novel comprehensive approach to...

Conspecifics are usually considered competitors negatively affecting food intake rates. However, their presence can also inform about resource quality by providing inadvertent social information. Few studies have investigated whether foragers perceive conspecifics as informers or competitors. Here, we experimentally tested whether variation in the...

Food availability is a major environmental factor that can influence life history within and across generations through direct effects on individual quality and indirect effects on the intensity of intra- and intercohort competition. Here, we investigated in yearling and adult common lizards (Zootoca vivipara) the immediate and delayed life-history...

Detailed studies of the mechanisms driving life history effects of food availability are of prime importance to understand the evolution of phenotypic plasticity and the capacity of organisms to produce better adapted phenotypes. Food availability may influence life history trajectories through three nonexclusive mechanisms: (i) immediate and long-...

Suite aux changements environnementaux entamés depuis plusieurs décennies, de nombreuses espèces d’oiseaux sont en déclin. En Europe, les tendances des effectifs reproducteurs sont bien estimées, grâce à la mise en place de suivis à long terme. Cependant, peu d’études se sont intéressées aux effectifs des espèces migratrices sur les sites de migrat...