Matters Arising |
Featured
-
-
Article
| Open AccessGeographical migration and fitness dynamics of Streptococcus pneumoniae
Mathematical modelling of 15 years of data from South Africa reveals the spread and vaccine-driven changes in fitness and antimicrobial resistance of Streptococcus pneumoniae.
- Sophie Belman
- , Noémie Lefrancq
- & Henrik Salje
-
Matters Arising |
Global effects of marine protected areas on food security are unknown
- Daniel Ovando
- , Owen Liu
- & Cody Szuwalski
-
Article |
Late Cenozoic cooling restructured global marine plankton communities
Analysis of Triton, a high-resolution dataset documenting the macroperforate planktonic foraminifera fossil record, reveals a global climate-linked equatorward shift of ecological and morphological community equitability over the past 8 million years.
- Adam Woodhouse
- , Anshuman Swain
- & Christopher M. Lowery
-
Article |
Small rainfall changes drive substantial changes in plant coexistence
Reduced precipitation changes competitive outcomes among plant species, and species pairs that were functionally more similar were less likely to experience these changes.
- Mary N. Van Dyke
- , Jonathan M. Levine
- & Nathan J. B. Kraft
-
Article |
Tropical tree mortality has increased with rising atmospheric water stress
Over the past 35 years, annual tree mortality risk has increased in the moist tropical forests of Australia and is associated with increased atmospheric water stress.
- David Bauman
- , Claire Fortunel
- & Sean M. McMahon
-
Matters Arising |
Emphasizing declining populations in the Living Planet Report
- Gopal Murali
- , Gabriel Henrique de Oliveira Caetano
- & Uri Roll
-
Article
| Open AccessEmergence of methicillin resistance predates the clinical use of antibiotics
Methicillin-resistant strains of Staphylococcus aureus appeared in European hedgehogs in the pre-antibiotic era as a co-evolutionary adaptation to antibiotic-producing dermatophytes and have spread within the local hedgehog populations and between hedgehogs and secondary hosts.
- Jesper Larsen
- , Claire L. Raisen
- & Anders R. Larsen
-
Article |
Long-term cyclic persistence in an experimental predator–prey system
The potential for infinite persistence of planktonic predator and prey cycles is experimentally demonstrated and these cycles show resilience in the presence of stochastic events.
- Bernd Blasius
- , Lars Rudolf
- & Gregor F. Fussmann
-
Article |
Chemotaxis as a navigation strategy to boost range expansion
Pioneering bacterial cells use chemotaxis along self-generated attractant gradients to facilitate rapid colonization of nutrient-replete environments.
- Jonas Cremer
- , Tomoya Honda
- & Terence Hwa
-
Letter |
Warfare and wildlife declines in Africa’s protected areas
Assessment of the impact of armed conflict on large herbivores in Africa between 1946 and 2010 reveals that high conflict frequency is an important predictor of wildlife population declines.
- Joshua H. Daskin
- & Robert M. Pringle
-
Letter |
Bumblebee family lineage survival is enhanced in high-quality landscapes
Analysis of three wild-caught bumblebee species shows that family lineage survival and persistence is significantly increased between successive colony cycle stages with the proportion of high-value foraging habitat near the natal colony.
- Claire Carvell
- , Andrew F. G. Bourke
- & Matthew S. Heard
-
Letter |
Weak synchronization and large-scale collective oscillation in dense bacterial suspensions
Cells in dense bacterial suspensions can self-organize into highly robust collective oscillatory motion, while individual cells move in an erratic manner; their interaction is modelled to reveal a weak synchronization mechanism.
- Chong Chen
- , Song Liu
- & Yilin Wu
-
Letter |
Evidence for a limit to human lifespan
Demographic analysis of life expectancy and maximum reported age at death provides evidence that human lifespan has reached its natural limit.
- Xiao Dong
- , Brandon Milholland
- & Jan Vijg
-
Letter |
Genomic analyses inform on migration events during the peopling of Eurasia
Whole-genome sequencing of individuals from 125 populations provides insight into patterns of genetic diversity, natural selection and human demographic history during the peopling of Eurasia and finds evidence for genetic vestiges of an early expansion of modern humans out of Africa in Papuans.
- Luca Pagani
- , Daniel John Lawson
- & Mait Metspalu
-
Letter |
Synchronized cycles of bacterial lysis for in vivo delivery
Clinically relevant bacteria have been engineered to lyse synchronously at a threshold population density and release genetically encoded therapeutics; treatment of mice with these bacteria slowed the growth of tumours.
- M. Omar Din
- , Tal Danino
- & Jeff Hasty
-
Letter |
Post-invasion demography of prehistoric humans in South America
South America was the last habitable continent to be colonized by humans; using a database of 1,147 archaeological sites and 5,464 radiocarbon dates spanning 14,000 to 2,000 years ago reveals two phases of the population history of the continent—a rapid expansion through the continent at low population sizes for over 8,000 years and then a second phase of sedentary lifestyle and exponential population growth starting around 5,000 years ago.
- Amy Goldberg
- , Alexis M. Mychajliw
- & Elizabeth A. Hadly
-
Letter |
Sex‐specific demography and generalization of the Trivers–Willard theory
The Trivers–Willard theory proposing that maternal condition influences offspring sex ratio is extended by analysing how differences in mortality rates, age‐specific reproduction and life history tactics between males and females may affect adaptive offspring sex ratio adjustment in two systems.
- Susanne Schindler
- , Jean‐Michel Gaillard
- & Tim Coulson
-
Letter |
Long-term decline of the Amazon carbon sink
The capacity of Amazonian forests to sequester carbon has weakened with potentially important implications for climate change.
- R. J. W. Brienen
- , O. L. Phillips
- & R. J. Zagt
-
Letter |
RETRACTED ARTICLE: Site-specific group selection drives locally adapted group compositions
Here, colonies of social spiders are used to investigate the evolution of a group-level trait, the ratio of individuals with the ‘docile’ versus ‘aggressive’ phenotype in a colony; experimental colonies were generated with varying ratios and established in the wild, revealing group-level selection.
- Jonathan N. Pruitt
- & Charles J. Goodnight
-
Letter |
A dynamic model of bovine tuberculosis spread and control in Great Britain
Bovine tuberculosis is a major economic burden on the cattle industry, and attempts to control it have been politically controversial; here farm movement and bovine tuberculosis incidence data are used to construct a mechanistic model and tease apart the factors contributing to epidemic bovine tuberculosis spread.
- Ellen Brooks-Pollock
- , Gareth O. Roberts
- & Matt J. Keeling
-
Article |
Neural population dynamics during reaching
- Mark M. Churchland
- , John P. Cunningham
- & Krishna V. Shenoy
-
Comment |
Migration as adaptation
Mobility can bring opportunities for coping with environmental change, say Richard Black, Stephen R. G. Bennett, Sandy M. Thomas and John R. Beddington.
- Richard Black
- , Stephen R. G. Bennett
- & John R. Beddington
-
Letter |
Transient dynamics of an altered large marine ecosystem
- Kenneth T. Frank
- , Brian Petrie
- & William C. Leggett
-
Letter |
Reliability of flipper-banded penguins as indicators of climate change
Much of what we know about the behaviour of animals in the wild comes from studies in which individual animals are marked for identification purposes. But can the marking itself affect the outcome? This study shows that it does. In a ten-year study on king penguins in the Antarctic, penguins sporting identification bands on their wings had significantly lower long-term fitness than unmarked penguins. This study should give pause for thought to researchers seeking to discover the behaviour of animals in the wild.
- Claire Saraux
- , Céline Le Bohec
- & Yvon Le Maho
-
Letter |
Demographic compensation and tipping points in climate-induced range shifts
Climate change is expected to shift the latitudinal and altitudinal ranges of species, but the low latitude or low altitude edge does not necessarily move as fast as the high edge. Here, demographic data on two tundra plants have been used to show that changed demographic rates at the lower edge are compensating for the warming climate, but that this effect will not last and a tipping point will be reached as temperatures get warmer.
- Daniel F. Doak
- & William F. Morris
-
Letter |
Early warning signals of extinction in deteriorating environments
Populations that become extinct because of environmental degradation pass a tipping point, after which extinction is inevitable. But theory predicts that the population's dynamics indicate what is coming beforehand, through the phenomenon of critical slowing down. It has now been shown that critical slowing down can be used to anticipate extinction in experimental populations of Daphnia magna.
- John M. Drake
- & Blaine D. Griffen
-
Letter |
Bacterial charity work leads to population-wide resistance
Bacteria regularly evolve antibiotic resistance, but little is known about this process at the population level. Here, a continuous culture of Escherichia coli facing increasing antibiotic levels is followed. Most isolates taken from this population are less antibiotic resistant than the population as a whole. A few highly resistant mutants provide protection to the less resistant constituents, in part by producing the signalling molecule indole, which serves to turn on drug efflux pumps and oxidative-stress protective mechanisms.
- Henry H. Lee
- , Michael N. Molla
- & James J. Collins
-
News |
Mexican 'climate migrants' predicted to flood US
A tenth of Mexico's population could surge north to escape climate-triggered crop failures, study claims.
- Zoë Corbyn
-
Letter |
Coupled dynamics of body mass and population growth in response to environmental change
Climate change can affect the phenology, population dynamics and morphology of species, but it is difficult to study all these factors and their interactions at once. Using long-term data for individual yellow-bellied marmots, these authors show that climate change has increased the length of the marmot growing season, leading to a gradual increase in individual size. It has simultaneously increased the fitness of large individuals, leading to a rapid increase in population size.
- Arpat Ozgul
- , Dylan Z. Childs
- & Tim Coulson
-
News |
Marmots fatten up on climate change
Rodent population boom linked to bigger bellies and longer summers.
- Lucas Laursen