Blar i NTNU Open på forfatter "Gamelon, Marlène"
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Accounting for interspecific competition and age structure in demographic analyses of density dependence improves predictions of fluctuations in population size
Gamelon, Marlène; Vriend, Stefan; Engen, Steinar; Adriaensen, Frank; Dhondt, A.A.; Evans, Simon R.; Matthysen, Erik; Sheldon, Ben C.; Sæther, Bernt-Erik (Peer reviewed; Journal article, 2019)Understanding species coexistence has long been a major goal of ecology. Coexistence theory for two competing species posits that intraspecific density dependence should be stronger than interspecific density dependence. ... -
Catch-effort model used as a management tool in exploited populations: Wild boar as a case study
Vajas, Pablo; Calenge, Clément; Gamelon, Marlène; Girard, Fabrice; Melac, Olivier; Chandosne, Charlette; Richard, Emmanuelle; Saïd, Sonia; Baubet, Eric (Peer reviewed; Journal article, 2021)For sustainable management of exploited populations, it is required to have good knowledge on temporal trends in population density to adapt the harvest. In this regard, hunting statistics are often collected routinely by ... -
Causes and consequences of body growth variation in hunted wild boar populations
Veylit, Lara (Doctoral theses at NTNU;2021:41, Doctoral thesis, 2021)The life of an organism can be simply described as its survival, growth, reproduction, and death. These life-history traits are influenced by both natural environmental variation as well as human activity (i.e. global ... -
The Demographic buffering hypothesis: Evidence and challenges
Hilde, Christoffer Høyvik; Gamelon, Marlène; Sæther, Bernt-Erik; Gaillard, Jean-Michel; Yoccoz, Nigel; Pelabon, Christophe (Peer reviewed; Journal article, 2020)In (st)age-structured populations, the long-run population growth rate is negatively affected by temporal variation in vital rates. In most cases, natural selection should minimize temporal variation in the vital rates to ... -
Detecting climate signals in populations across life histories
Jenouvrier, Stéphanie; Long, Matthew C.; Coste, Christophe; Holland, Marika M.; Gamelon, Marlène; Yoccoz, Nigel; Sæther, Bernt-Erik (Peer reviewed; Journal article, 2021)Climate impacts are not always easily discerned in wild populations as detecting climate change signals in populations is challenged by stochastic noise associated with natural climate variability, variability in biotic ... -
Does multiple paternity explain phenotypic variation among offspring in wild boar?
Gamelon, Marlène; Gayet, Thibault; Baubet, Eric; Devillard, Sébastien; Say, Ludovic; Brandt, Serge; Pelabon, Christophe; Sæther, Bernt-Erik (Journal article; Peer reviewed, 2018)During pregnancy, littermates compete to extract maternal resources from the placenta. Unequal extraction of resources leads to developmental differences among offspring and thus within-litter variation in offspring mass. ... -
Effects of pulsed resources on the dynamics of seed consumer populations: a comparative demographic study in wild boar
Gamelon, Marlène; Touzot, Laura; Baubet, Eric; Cachelou, Jessica; Focardi, Stefano; Franzetti, Barbara; Nivois, Eveline; Veylit, Lara; Sæther, Bernt-Erik (Peer reviewed; Journal article, 2021)Mast seeding is a well-known example of pulsed resources in terrestrial ecosystems. Despite the large literature available so far on the effects of mast seeding on the dynamics of seed consumer populations, it remains ... -
Efficient use of harvest data: a size-class-structured integrated population model for exploited populations
Gamelon, Marlène; Nater, Chloé Rebecca; Baubet, Eric; Besnard, Aurélien; Touzot, Laura; Gaillard, Jean-Michel; Lebreton, Jean-Dominique; Gimenez, Olivier (Journal article; Peer reviewed, 2021) -
Environmental drivers of varying selective optima in a small passerine: A multivariate, multiepisodic approach
Gamelon, Marlène; Tufto, Jarle; Nilsson, Anna; Jerstad, Kurt; Røstad, Ole Wiggo; Stenseth, Nils Christian; Sæther, Bernt-Erik (Journal article; Peer reviewed, 2018)In changing environments, phenotypic traits are shaped by numerous agents of selection. The optimal phenotypic value maximizing the fitness of an individual thus varies through time and space with various environmental ... -
Harvesting can stabilise population fluctuations and buffer the impacts of extreme climatic events
Peeters, Bart; Grøtan, Vidar; Gamelon, Marlène; Veiberg, Vebjørn; Lee, Aline Magdalena; Fryxell, John M.; Albon, Steve D.; Sæther, Bernt-Erik; Engen, Steinar; Loe, Leif Egil; Hansen, Brage Bremset (Peer reviewed; Journal article, 2022)Harvesting can magnify the destabilising effects of environmental perturbations on population dynamics and, thereby, increase extinction risk. However, population-dynamic theory predicts that impacts of harvesting depend ... -
How do conditions at birth influence early‐life growth rates in wild boar?
Veylit, Lara; Sæther, Bernt-Erik; Gaillard, Jean Michel; Baubet, Eric; Gamelon, Marlène (Peer reviewed; Journal article, 2020)Weather conditions and population density individuals experience at birth influence their life-history traits and thereby population dynamics. Early-life individual growth is a key fitness-related trait; however, how it ... -
Hydrology influences breeding time in the white‑throated dipper
Nilsson, Anna; Skaugen, Thomas; Reitan, Trond; LAbée-Lund, Jan Henning; Gamelon, Marlène; Jerstad, Kurt; Røstad, Ole Wiggo; Slagsvold, Tore; Stenseth, Nils Christian; Vøllestad, Leif Asbjørn; Walseng, Bjørn (Peer reviewed; Journal article, 2020)Background: Earlier breeding is one of the strongest responses to global change in birds and is a key factor determining reproductive success. In most studies of climate effects, the focus has been on large-scale environmental ... -
Interactions between demography and environmental effects are important determinants of population dynamics
Gamelon, Marlène; Grøtan, Vidar; Nilsson, Anna L. K.; Engen, Steinar; Hurrell, James W.; Jerstad, Kurt; Phillips, Adam S.; Røstad, Ole Wiggo; Slagsvold, Tore; Walseng, Bjørn; Stenseth, Nils Christian; Sæther, Bernt-Erik (Journal article; Peer reviewed, 2017)Climate change will affect the population dynamics of many species, yet the consequences for the long-term persistence of populations are poorly understood. A major reason for this is that density-dependent feedback effects ... -
Interactions between demography and environmental effects are important determinants of population dynamics
Gamelon, Marlène; Grøtan, Vidar; Nilsson, Anna; Engen, Steinar; Hurrell, James W.; Jerstad, Kurt; Phillips, Adam S.; Røstad, Ole Wiggo; Slagsvold, Tore; Walseng, Bjørn; Stenseth, Nils Christian; Sæther, Bernt-Erik (Journal article; Peer reviewed, 2017)Climate change will affect the population dynamics of many species, yet the consequences for the long-term persistence of populations are poorly understood. A major reason for this is that density-dependent feedback effects ... -
Location is everything, but climate gets a share: analyzing small-scale environmental influences on breeding success in the white-throated dipper
Nilsson, Anna L.K.; Reitan, Trond; Skaugen, Thomas; L'Abee-Lund, Jan Henning; Gamelon, Marlène; Jerstad, Kurt; Røstad, Ole Wiggo; Slagsvold, Tore; Stenseth, Nils Christian; Vøllestad, L. Asbjørn; Walseng, Bjørn (Peer reviewed; Journal article, 2020)Ecological and evolutionary effects of environmental variation on wild populations are of particular interest in a changing world. Large-scale environmental indices are classically used as environmental explanatory variables ... -
Many lifetime growth trajectories for a single mammal
Veylit, Lara; Sæther, Bernt-Erik; Gaillard, Jean-Michel; Baubet, Eric; Gamelon, Marlène (Peer reviewed; Journal article, 2021)Despite their importance in shaping life history tactics and population dynamics, individual growth trajectories have only been rarely explored in the wild because their analysis requires multiple measurements of individuals ... -
More frequent extreme climate events stabilize reindeer population dynamics
Hansen, Brage Bremset; Gamelon, Marlène; Albon, Steve D.; Lee, Aline Magdalena; Stien, Audun; Irvine, Robert Justin; Sæther, Bernt-Erik; Loe, Leif Egil; Ropstad, Erik; Veiberg, Vebjørn; Grøtan, Vidar (Journal article; Peer reviewed, 2019)Extreme climate events often cause population crashes but are difficult to account for in population-dynamic studies. Especially in long-lived animals, density dependence and demography may induce lagged impacts of ... -
On the roles of density dependence and environmental fluctuations in driving ecoevolutionary dynamics of hole-nesting passerines
Vriend, Stefan J.G (Doctoral theses at NTNU;2022:125, Doctoral thesis, 2022)Ecology and evolution are intrinsically linked through an inevitable struggle for existence. This has been appreciated over very long timescales, such as the adaptation of organisms to the diverse environments across the ... -
On the use of the coefficient of variation to quantify and compare trait variation
Pelabon, Christophe; Hilde, Christoffer Høyvik; Einum, Sigurd; Gamelon, Marlène (Peer reviewed; Journal article, 2020)Meaningful comparison of variation in quantitative trait requires controlling for both the dimension of the varying entity and the dimension of the factor generating variation. Although the coefficient of variation (CV; ... -
Quantifying fixed individual heterogeneity in demographic parameters: Performance of correlated random effects for Bernoulli variables
Fay, Rémi; Authier, Matthieu; Hamel, Sandra; Jenouvrier, Stéphanie; van de Pol, Martijn; Cam, Emmanuelle; Gaillard, Jean-Michel; Yoccoz, Nigel G.; Acker, Paul; Allen, Andrew; Aubry, Lise M.; Bonenfant, Christophe; Caswell, Hal; Coste, Christophe; Larue, Benjamin; Le Coeur, Christie; Gamelon, Marlène; Macdonald, Kaitlin R.; Moiron, Maria; Nicol-Harper, Alex; Pelletier, Fanie; Rotella, Jay J.; Teplitsky, Celine; Touzot, Laura; Wells, Caitlin P.; Sæther, Bernt-Erik (Peer reviewed; Journal article, 2021)1. An increasing number of empirical studies aim to quantify individual variation in demographic parameters because these patterns are key for evolutionary and ecological processes. Advanced approaches to estimate individual ...