Article
Biodiversity Conservation
Alice Monnier-Corbel, Anne-Christine Monnet, Leo Bacon, Blas M. Benito, Alexandre Robert, Yves Hingrat
Summary: The study indicates that reproductive success of North African Houbara bustard is negatively impacted by local densities, with this relationship remaining constant over time and space and not varying with habitat quality.
GLOBAL ECOLOGY AND CONSERVATION
(2022)
Article
Multidisciplinary Sciences
Pedro G. Nicolau, Rolf A. Ims, Sigrunn H. Sorbye, Nigel G. Yoccoz
Summary: Studies of spatial population synchrony are important for understanding ecological dynamics. Climate change has become a new focus in these studies, but the role of season-specific density dependence in shaping large-scale population synchrony has been overlooked. This study presents an analytical protocol that considers both season and geographic context-specific density dependence to better understand the sources of population synchrony. By analyzing time series of rodent populations, the study reveals that season-specific density dependence is a major component of population synchrony.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Multidisciplinary Sciences
Crispin M. Mutshinda, Aditya Mishra, Zoe V. Finkel, Andrew J. Irwin
Summary: This study investigates the effects of density regulation on population variability in stochastic environments using a Bayesian modeling approach. The results show that population fluctuations are larger in populations with strong density regulation under random environmental changes. This finding has important implications for population sustainability and can contribute to the improvement of population dynamics models.
Article
Ecology
Evan C. Johnson, Alan Hastings, Chris Ray
Summary: This study found that population crashes are caused by an interaction between stochasticity and successive episodes of density dependence, helping to explain crashes in a broader range of environments. The research also showed that the interaction between nonlinearity and stochasticity can lead to chaotic population dynamics and a double-humped one-generation population map, suggesting the possibility of unexpected behavior in various systems.
Article
Chemistry, Physical
Johanna Busch, Jan Neumann, Dietmar Paschek
Summary: The kinetics of hydrogen bond breaking and re-formation in liquid water can be studied using HB population correlation functions (HBPCFs), with long-time behavior controlled by translational diffusion. The presence of periodic boundary conditions (PBCs) can disrupt this behavior, but keeping trajectories wrapped allows for more efficient calculation of HBPCFs. Different approximations lead to deviations in the long-time behavior, but a simple expression is provided for estimating the maximum time for reliable computation of the long-time behavior. A correction for systems with PBCs for wrapped trajectories is derived to fully recover the true long-time behavior. Results from MD simulations of water using this correction are discussed, along with implications for HB lifetimes and system size effects.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Ecology
Gregory F. Grether, Ann E. Finneran, Jonathan P. Drury
Summary: Understanding species distributions and predicting range shifts require considering all relevant abiotic factors and biotic interactions. This study used ecological niche models to evaluate if differences in the distribution range of rubyspot damselfly species can be explained by niche differentiation. Evidence for climatic niche differentiation was found, providing support for the hypothesis that reproductive interference limits range expansion.
Article
Mathematics, Applied
Na Zhang, Yonggui Kao, Binfeng Xie
Summary: In this article, a fractional-order prey-predator system with Beddington-DeAngelis functional response incorporating dread of predators and prey shelter is proposed and studied. The existence, uniqueness, and well posedness of the system solution are proved, and the stability and bifurcation analysis are conducted. It is found that strong memory can promote the stable coexistence of two species in the system.
Article
Mathematics, Applied
Jose S. Canovas, Maria Munoz-Guillermo
Summary: This paper examines a hyperbolic-exponential growth model with density regulation and two stages, following the scheme proposed by Rodriguez (1998). The study focuses on analyzing the dynamics and complexity of the system, particularly exploring the existence and stability of fixed points using the W Lambert function, and proving the presence of chaos for certain parameter values. The model also demonstrates dynamic Parrondo's paradox, showing complex dynamics when simple maps are combined.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2022)
Article
Ecology
Louise Forsblom, Andreas Linden, Jonna Engstrom-Ost, Maiju Lehtiniemi, Erik Bonsdorff
Summary: The interactions within the benthic community were found to be important, but there was no direct coupling between sediment-dwelling benthic taxa and pelagic copepods and cladocerans on the annual scale. Positive residual correlations were observed between copepods and cladocerans, while they tended to correlate negatively with zoobenthic taxa.
ECOLOGY AND EVOLUTION
(2021)
Article
Physics, Fluids & Plasmas
Hai-Rong Qin, Chun-Shing Lee, Yong-Jun Lu
Summary: This article proposes a distinguishable-particle glassy model suitable for molecular dynamics simulation of structural glasses. The kinetic fragility of supercooled liquids can be sensitively tuned by changing the distribution of particle interactions. Liquid-liquid phase transitions are observed above the glass transition in the model liquid, and these transitions are facilitated by lowering fragility.
Article
Engineering, Multidisciplinary
Peng Gao, Liyang Xie
Summary: In this paper, generalized reliability models and failure rate models of mechanical systems are developed considering strength degradation, imperfect maintenance, failure correlation, and maintenance correlation. The models do not rely on empirical assumptions and have clear physical meaning. Monte Carlo simulations verify the correctness and effectiveness of the models. Numerical examples analyze the influences of failure correlation and maintenance correlation on generalized reliability.
MATHEMATICAL PROBLEMS IN ENGINEERING
(2022)
Review
Endocrinology & Metabolism
Alexander Suvorov
Summary: A recent study predicts a decline in population numbers mainly due to decreased reproduction rather than increased mortality rates, with changes in reproductive behavior and physiology playing a key role. The research suggests a hypothesis that current reproductive trends are partially influenced by increasing population densities.
Review
Endocrinology & Metabolism
Alexander Suvorov
Summary: A recent study predicts a significant drop in population numbers following a peak by 2064, mainly due to decreased reproduction rather than increased mortality. The study discusses the negative impact of increasing population densities on reproductive behavior and physiology, highlighting the complex causal chain involved.
Article
Ecology
Peter A. Hamback
Summary: Temperature and precipitation play key roles in determining arthropod population densities, with both intra- and interspecific density dependence, as well as interactive effects of weather variables. High temperatures in spring only increase leaf beetle densities when combined with high rainfall, while low temperatures are beneficial when paired with low rainfall. In summer, high temperatures and low rainfall induce drought, affecting food availability for leaf feeding larvae. The flower feeding weevil, in contrast, is less directly affected by temperature and precipitation, but more by interspecific density dependence through reduced resource availability from previous leaf beetle damage.
Article
Engineering, Civil
Panpan Gai, Zhaodong Xu, Billie F. Spencer Jr, Jun Dai, Hongwei Li
Summary: Due to the influence of excitation frequency and amplitude, the modeling of viscoelastic damping materials and devices faces difficulties in coordinating simplicity, accuracy, generality, and flexibility. To solve this problem, a nonlinear frequency-amplitude model was established by combining the proposed generalized complex stiffness model with the Berg friction model. A dynamic analysis method based on a state space approach was proposed to accurately represent the mechanical model. Experimental tests were conducted to study the dynamic mechanical performance of viscoelastic dampers and isolators under different excitation conditions. The accuracy of the nonlinear frequency-amplitude model was validated using experimental data.
ENGINEERING STRUCTURES
(2023)
Article
Biochemistry & Molecular Biology
Kazuki Kurita, Daisuke Kyogoku, Atsushi Abe, Masatsugu Yokota, Yuji Isagi
GENES & GENETIC SYSTEMS
(2019)
Review
Ecology
Daisuke Kyogoku
POPULATION ECOLOGY
(2020)
Review
Ecology
Daisuke Kyogoku, David Wheatcroft
JOURNAL OF EVOLUTIONARY BIOLOGY
(2020)
Review
Ecology
Masato Yamamichi, Daisuke Kyogoku, Ryosuke Iritani, Kazuya Kobayashi, Yuma Takahashi, Kaori Tsurui-Sato, Akira Yamawo, Shigeto Dobata, Kazuki Tsuji, Michio Kondoh
TRENDS IN ECOLOGY & EVOLUTION
(2020)
Article
Ecology
Daisuke Kyogoku, Hanna Kokko
JOURNAL OF ANIMAL ECOLOGY
(2020)
Article
Ecology
Daisuke Kyogoku, Teiji Sota
Summary: The study found that the effects of sexual selection on female fitness include multiple mechanisms, with an overall positive impact. Female beetles from polygamous lines produced more offspring due to their larger size and higher fecundity.
JOURNAL OF EVOLUTIONARY BIOLOGY
(2021)
Article
Agronomy
Daisuke Kyogoku
Summary: Reproductive interference occurs when closely related species interact reproductively, but experimental results suggest that apomictic dandelions do not have a negative effect on the sexual reproduction of Taraxacum japonicum.
Review
Ecology
Miguel Gomez-Llano, Rachel M. Germain, Daisuke Kyogoku, Mark A. McPeek, Adam M. Siepielski
Summary: Recent research has shown that ecologically equivalent species can coexist under the regulation of reproductive interactions and sexual selection. Reproductive interactions play a significant role in maintaining species diversity, as highlighted by theoretical models and empirical studies. This neglected pathway towards explaining species diversity offers new insights and future research directions within the conceptual framework of coexistence theory.
TRENDS IN ECOLOGY & EVOLUTION
(2021)
Article
Ecology
Daisuke Kyogoku
Summary: This study explores the impact of competition and reproductive interactions on the coexistence of congeneric seed beetles from an ecological perspective, with a focus on reproductive biology and reproductive interference. Through literature review and reanalysis of previous research, the study provides insights for future work and implications for general ecological and evolutionary understanding.
ECOLOGICAL RESEARCH
(2021)
Article
Multidisciplinary Sciences
Yuichi Okinaga, Daisuke Kyogoku, Satoshi Kondo, Atsushi J. Nagano, Kei Hirose
Summary: This study used Monte Carlo simulations to investigate the prediction accuracy of different network structures under varying sample sizes. It found that lasso method requires a large number of samples for good prediction accuracy in a random gene regulation network, while PCR method consistently provided poor prediction accuracy regardless of sample size. On the other hand, in a real gene regulation network with a scale-free structure, lasso method only needs a relatively small number of samples for accurate prediction.
SCIENTIFIC REPORTS
(2021)
Article
Ecology
Daisuke Kyogoku, Ryo Yamaguchi
Summary: Costly heterospecific mating interactions can lead to prezygotic reproductive isolation, and habitat preference is a potential trait that responds to the selection caused by maladaptive hybridization, resulting in interspecific habitat segregation.
JOURNAL OF EVOLUTIONARY BIOLOGY
(2023)
Article
Ecology
Daisuke Kyogoku, Shigeto Dobata, Rui Takashima, Teiji Sota
Summary: Mating rates differ between males and females, with males benefiting from multiple matings while females gain little benefit and incur costs. Experimental evolution studies have tested the prediction of sexually antagonistic evolution in mating rates but have yielded only partial support.
JOURNAL OF EVOLUTIONARY BIOLOGY
(2023)
Article
Ecology
Takanori Kawase, Daisuke Kyogoku, Kazutaka Kawatsu, Noboru Katayama, Takeshi Miki, Michio Kondoh
Summary: This study evaluated the effects of changing environmental conditions on interaction strength and population dynamics using two species of seed beetles. The results showed that while interaction strength influenced population dynamics, increasing habitat size did not necessarily reduce competition strength.
POPULATION ECOLOGY
(2023)
Article
Multidisciplinary Sciences
Daisuke Kyogoku, Yoko Wada
Summary: Scientific grant applications are often subject to gender bias in peer review, with male applicants having higher success rates than female applicants. This study analyzes the success rates of different fellowship categories offered by the Japan Society for the Promotion of Science (JSPS) and finds consistent gender gaps, with males having higher success rates. The gender gaps vary across research fields and are significantly associated with the representation of female applicants. Unintentional gender bias in the review process is suggested as a potential cause for these gaps.
Correction
Biochemistry & Molecular Biology
Kenji Ogaki, Kenji Suetsugu, Keiju Kishikawa, Daisuke Kyogoku, Kohtaroh Shutoh, Yuji Isagi, Shingo Kaneko
GENES & GENETIC SYSTEMS
(2020)