Demographic consequences of changes in environmental periodicity

Eva, Conquet,; Özgül, Arpat; Blumstein, Daniel T.; Armitage, Kenneth B.; Oli, Madan K.; Martin, Julien G. A.; Clutton‐Brock, Tim; Paniw, Maria

doi:10.1002/ecy.3894

Cited by 7 publications

(5 citation statements)

References 139 publications

(214 reference statements)

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“…It would be valuable to track soil moisture in each plot after rainfall events to measure the magnitude and duration of the effect of the watering treatment on soil conditions. It would also be interesting to implement the watering treatment before the onset of winter rainfall to assess how the timing of rainfall influences emergence and subsequent vital rates via plant–plant interactions (Compagnoni et al., 2016; Conquet et al., 2023; Levine et al., 2008).…”

Section: Discussionmentioning

confidence: 99%

Individual vital rates respond differently to local‐scale environmental variation and neighbour removal

Catling,

Mayfield,

Dwyer

2024

Journal of Ecology

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Understanding how plant fitness varies along natural gradients is critical for predicting responses to environmental change. However, individual vital rates are often used as fitness proxies without knowing how other vital rates vary along the same gradients. We investigated how canopy cover, plant–plant interactions, water availability and soil properties influenced the emergence, survival, seed production and population growth rates of eight annual plant species in semi‐arid Western Australia. We sowed seeds into sun‐exposed and shaded blocks across a reserve, removed all neighbouring plants from half of the interaction neighbourhoods, and used rainout shelters to reduce and increase precipitation relative to ambient plots. Canopy cover had strong negative effects on emergence, but few direct impacts on other vital rates and population growth rates. Direct competitive effects on survival and seed production were rare, although evident for population growth rate for 3/8 species. Competition was stronger in open than shaded plots for half of the species. Canopy cover also interacted with the watering treatment to influence survival of half of the species, but watering alone had few direct impacts on species' vital and population growth rates. We found only positive significant correlations between pairs of rates, and survival and seed production were far more frequently correlated with population growth rate than emergence. Synthesis. Our study illustrates that vital rates can respond to the same local‐scale environmental variation in different ways that are likely not driven by life history trade‐offs. We caution against using emergence as a proxy for population growth rate and emphasise that no single vital rate was a reliable fitness proxy overall. Interactions among abiotic and biotic factors were important drivers of vital and population growth rates for some species, highlighting the need to account for plant–plant interactions when predicting population responses to environmental change.

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Section: Discussionmentioning

confidence: 99%

Individual vital rates respond differently to local‐scale environmental variation and neighbour removal

Catling,

Mayfield,

Dwyer

2024

Journal of Ecology

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“…However, relationships with demographic processes can be disrupted by, for example, extreme events (Frederiksen et al, 2008 ). Positive correlations driven purely by environmental factors have been observed in several taxa, for example in meerkats ( Suricata suricatta ), were high recruitment of dominant breeding individuals, led to reduced emigration of ‘helper individuals’ in the same year, positively affecting population growth (Conquet et al, 2022 ). The same mechanisms can also explain negative correlations, for example in oak trees where growth and reproduction were both dependent on the same environmental conditions, but in opposite ways (Knops et al, 2007 ).…”

Section: Discussionmentioning

confidence: 99%

Consequences of cross‐season demographic correlations for population viability

Layton‐Matthews

Reiertsen

Erikstad

et al. 2023

Ecology and Evolution

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Demographic correlations are pervasive in wildlife populations and can represent important secondary drivers of population growth. Empirical evidence suggests that correlations are in general positive for long-lived species, but little is known about the degree of variation among spatially segregated populations of the same species in relation to environmental conditions. We assessed the relative importance of two crossseason correlations in survival and productivity, for three Atlantic puffin (Fratercula arctica) populations with contrasting population trajectories and non-overlapping year-round distributions. The two correlations reflected either a relationship between adult survival prior to breeding on productivity, or a relationship between productiv-

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“…For each of the resulting 154 animal species, I retained the 'grand mean' MPM, which describes the dynamics of the population across the length of the study by calculating the element-by-element arithmetic mean MPM, thus resulting in one MPM per species. In addition, I supplemented my dataset with a recent study on meerkat demography [50], not yet incorporated in COMADRE. For the 10 years of seasonal MPMs available in this study, I retained the MPMs corresponding to 1998-2002, corresponding to normal environmental conditions (M. Paniw, pers.…”

Section: Demographic Datamentioning

confidence: 99%

More social species live longer, have higher generation times, and longer reproductive windows

Salguero-Gómez

2024

Preprint

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The role of sociality on the demography of animal species has become an intense focus of research in recent decades. However, efforts to understand the sociality-demography nexus have focused on single species or isolated taxonomic groups. Consequently, we lack generality regarding how sociality shapes demographic traits along the Animal Kingdom. Here, I propose a continuum of sociality, from solitary to tightly social, and test whether it predicts key demographic properties of 152 species, from jellyfish to humans. After correction for body mass and phylogenetic relationships, I show that the sociality continuum predicts key life history traits: more social species live longer, postpone maturity, have greater generation time, and greater probability of achieving reproduction than solitary, gregarious, communal, or colonial species. The sociality continuum is positively correlated with the fast-slow continuum. However, contrary to predictions, sociality does not result in more buffered populations: more social species have a lower ability to benefit from disturbances, although display greater resistance than more solitary species. Finally, I also show that sociality does not shape reproductive or actuarial senescence rates. This cross-taxonomic examination of sociality across the demography of 13 taxonomic classes highlights keyways in which individual interactions shape most aspects of animal demography.

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Demographic consequences of changes in environmental periodicity

Abstract: Data to reproduce the analysis of the effect of changes in environmental periodicity on the marmot (Marmota flaviventer), meerkat (Suricata suricatta), and dewy-pine (Drosophyllum lusitanicum) populations.

Cited by 7 publications

References 139 publications

Individual vital rates respond differently to local‐scale environmental variation and neighbour removal

Individual vital rates respond differently to local‐scale environmental variation and neighbour removal

Consequences of cross‐season demographic correlations for population viability

More social species live longer, have higher generation times, and longer reproductive windows

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