A5078250742- Ecology and Vegetation Dynamics Studies
- Evolutionary Psychology and Human Behavior
- Primate Behavior and Ecology
- Evolutionary Game Theory and Cooperation
- Plant and animal studies
- Species Distribution and Climate Change
- Wildlife Ecology and Conservation
- Fish Ecology and Management Studies
- Rangeland and Wildlife Management
- Marine and fisheries research
- Animal Behavior and Reproduction
- Education Systems and Policy
- Marine Bivalve and Aquaculture Studies
- Coral and Marine Ecosystems Studies
- Genetics, Aging, and Longevity in Model Organisms
- Insurance, Mortality, Demography, Risk Management
- Higher Education Learning Practices
- Forest ecology and management
- Ecology and biodiversity studies
University of California, Santa Barbara
2019-2022
University of California, Santa Cruz
2016-2017
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2016-2017
National Oceanic and Atmospheric Administration
2016-2017
NOAA National Marine Fisheries Service
2016-2017
Stanford University
2010-2014
Max Planck Institute for Demographic Research
2013-2014
KU Leuven
2011
Summary Schedules of survival, growth and reproduction are key life‐history traits. Data on how these traits vary among species populations fundamental to our understanding the ecological conditions that have shaped plant evolution. Because demographic schedules determine population or decline, such data help us understand different biomes shape ecology, communities respond global change develop successful management tools for endangered invasive species. Matrix models summarize life cycle...
Abstract How populations respond to climate change depends on the interplay between life history, resource availability, and intensity of change. Roe deer are income breeders, with high levels allocation reproduction, hence strongly constrained by availability quality resources during spring. We investigated how recent has influenced demographic processes in two this widespread species. Spring began increasingly earlier over study, allowing us identify 2 periods contrasting onset Both grew...
Summary 1. Life table response experiment (LTRE) analyses have been widely used to examine the sources of differences in long‐term deterministic growth rate ( r = log λ ) stage‐structured populations that live spatially distinct habitats or under experimental conditions. However, existing methods for LTRE analysis ignore fact persistent temporal variation matrix elements results a stochastic s is different from and thus do not take into account environmental stochasticity. 2. Here, we...
The evolutionary biologist W. D. Hamilton (Hamilton 1966
Significance Much of what is known about human life histories based on studying modern hunter-gatherers experiencing rapid population growth. Yet, if populations are near-stationary over most their evolutionary history, the positive growth contemporary foragers puzzling and potentially unrepresentative. Investigating multiple demographic scenarios in a large sample chimpanzee populations, we find that periodic catastrophes combined with plausible fertility or mortality reductions can...
In classical evolutionary models, the force of natural selection diminishes with age toward zero by last reproduction. However, intergenerational resource transfers and other late-life contributions in social species may select for postreproductive longevity. We present a formal framework estimating indirect fitness via production skills-intensive foraging niche, reflecting kinship cooperation among group members. Among contemporary human hunter-gatherers horticulturalists, from exceed...
Herbivores can have strong deleterious effects on vital rates (growth, reproduction, and survival) thus negatively impact the population dynamics of plant species. In practice, however, these might be strongly correlated, for example as a result tradeoffs between rates. To get better insights into herbivory long‐lived grassland Primula veris projection matrices were constructed from demographic data collected 1999 2008 (nine annual transitions). Data in two large populations, each which was...
Although correlations between vital rates can have important effects on evolution and demography, few studies investigated their population dynamics. Here, we extend life-table response experiments (LTREs) to variable environments, showing how quantify contributions made by (1) mean rates, (2) variability driven environmental fluctuations, (3) implying demographic trade-offs reflecting stage transition synchrony, (4) elasticities local selection pressures. Applying our methods the lady's...
Background Humans life histories have been described as “slow”, patterned by slow growth, delayed maturity, and long span. While it is known that human history diverged from of a recent common chimpanzee-human ancestor some ~4–8 mya, unclear how selection pressures led to these distinct traits. To provide insight, we compare wild chimpanzees subsistence societies in order identify the age-specific vital rates best explain fitness variation, species divergence. Methods We employ Life Table...
Abstract Many studies of semelparous salmon populations use Leslie matrices that classify individuals on the basis age alone and do not explicitly impose death upon reproduction. Although these models may suffice for studying long‐term population dynamics (like asymptotic growth rate), they accurately represent diversity individual life history outcomes in populations. Cohorts breeding at different ages have traits (e.g., first reproduction remaining expectancy) are obscured this distorts...
Hatcheries can support salmon fisheries but also impact natural populations. We model the proportional hatchery contributions to ocean catch, natural-area spawning, and egg production based on production, maturation, fecundity, straying. develop indices of hatchery-origin catch per stray spawner measuring trade-off between supplementing harvest limiting impacts; higher values indicate success in increasing relative strays spawning areas. Hatchery fish maturing early lowers (and proportion...
Abstract Background We compare life histories and selection forces among chimpanzees human subsistence societies in order to identify the age-specific vital rates that best explain fitness variation, pressures species divergence. Methods employ Life Table Response Experiments quantify rate contributions population growth differences. Although widespread ecology, these methods have not been applied populations or look at differences humans chimpanzees. also estimate correlations between...