Article
Ecology
Daniel F. Doak, Ellen Waddle, Ryan E. Langendorf, Allison M. Louthan, Nathalie Isabelle Chardon, Reilly R. Dibner, Douglas A. Keinath, Elizabeth Lombardi, Christopher Steenbock, Robert K. Shriver, Cristina Linares, Maria Begona Garcia, W. Chris Funk, Sarah W. Fitzpatrick, William F. Morris, Megan L. DeMarche
Summary: Researchers have found that IPMs may be more statistically efficient, biologically realistic, and accurate than classic matrix models, but there is little evidence to suggest that discrete vital rate estimation is less accurate than continuous functions across a wide range of sample sizes or size classes. Additionally, empirical sample sizes generally matter more than modeling approach for the accuracy of demographic outputs.
ECOLOGICAL MONOGRAPHS
(2021)
Article
Ecology
Andrew M. Allen, Eelke Jongejans, Martijn van de Pol, Bruno J. Ens, Magali Frauendorf, Martijn van der Sluijs, Hans de Kroon
Summary: Understanding the demographic mechanisms, individual variability, and their changes over time is crucial in understanding population decline. Studying the demographics of Eurasian Oystercatchers over the past four decades, it was found that the joint action of several key demographic variables explains the decline. Temporal variation in demographic causes of decline is important for conservation actions.
Article
Ecology
Kaitlin R. R. Macdonald, Jay J. J. Rotella, J. Terrill Paterson
Summary: Identifying and accounting for unobserved individual heterogeneity in vital rates is important for estimating population-level vital rates and identifying life-history strategies. This study investigates how changing the distribution of individual heterogeneity in reproduction affects population dynamics.
JOURNAL OF ANIMAL ECOLOGY
(2023)
Article
Plant Sciences
Alden B. Griffith, Vikki L. Rodgers, Jeffrey S. Dukes
Summary: Theories of plant invasions suggest that plant communities are more easily invaded when resources increase and competition decreases. Experimental manipulations showed that removing competitors significantly increased invasibility, while precipitation had little effect and moderate drought relief actually led to higher invasibility. The study demonstrates the complex interplay between abiotic and biotic factors in mediating invasibility.
JOURNAL OF ECOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Zheng Zhai, Hengchao Chen, Qiang Sun
Summary: This paper proposes a method to solve the projection matrix approximation problem with an additional entrywise bounded constraint. The authors introduce a new differentiable convex penalty and derive an ADMM algorithm. The convergence properties of the algorithm are established theoretically, and numerical experiments demonstrate its superiority over competitors.
IEEE SIGNAL PROCESSING LETTERS
(2023)
Article
Ecology
Tom E. X. Miller, Aldo Compagnoni
Summary: Understanding the mechanisms that generate biogeographic range limits is essential in ecology. In this study, range boundary formation in Texas bluegrass (Poa arachnifera), a perennial dioecious plant, was examined. The results showed that mate limitation may constrain the distribution of the species, with female-biased flowering approaching the eastern range limits. Furthermore, demographic modeling revealed that declines in population growth were driven primarily by female vital rates. These findings suggest that female-dominant range limits may be common in long-lived species with polygamous mating systems, and that predictions of range shifts due to environmental change can often be based on female responses alone.
AMERICAN NATURALIST
(2022)
Article
Ecology
Matthew G. Keevil, Natasha Noble, Sean P. Boyle, David Lesbarreres, Ronald J. Brooks, Jacqueline D. Litzgus
Summary: Adult mortality is crucial for at-risk wildlife populations, but road ecology studies often neglect the impact on juvenile individuals during natal dispersal. To address this, we used reproductive value analysis to quantify the relative population-level impacts of adult and juvenile mortality on snapping turtles in Ontario, Canada. We found that both adult and juvenile mortality had similar importance, highlighting the need to consider road impacts across all life stages even for species with slow life histories.
ECOLOGICAL APPLICATIONS
(2023)
Article
Mathematics, Applied
M. H. Heydari, Sh. Zhagharian, M. Razzaghi
Summary: This paper introduces a collocation procedure based on the shifted Jacobi polynomials to find numerical solutions for one- and two-dimensional stochastic multi-order fractional diffusion-wave equations. The procedure obtains operational matrices for classical and stochastic integrals, as well as fractional and classical differentiations of these polynomials. By representing the problem solution using an expansion of these polynomials and solving the resulting algebraic equations, the coefficients of expansion and the solution of the original problem are found. The correctness of the procedure is verified through four examples.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2023)
Article
Multidisciplinary Sciences
Blair R. K. Shevlin, Stephanie M. Smith, Jan Hausfeld, Ian Krajbich
Summary: It is widely believed that people's choices become less sensitive to changes in value as the value increases. However, contrary to predictions, research shows that decisions between high-value options are made faster and more accurately.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Mathematics
Claudia A. Perez-Pinacho, Cristina Verde
Summary: This study addresses the problem of equivalence between fractional and integer order diffusion models, and proves the existence of a unique integral transformation mapping the solution of the integer order model to a solution of the fractional order model. The corresponding inverse integral transformation is established to guarantee the equivalence and well-posedness of the solutions of these models. Finally, the proposed method is compared with the Fourier transform method through a specific example, demonstrating its effectiveness.
Article
Ecology
James Cant, James D. Reimer, Brigitte Sommer, Katie M. Cook, Sun W. Kim, Carrie A. Sims, Takuma Mezaki, Cliodhna O'Flaherty, Maxime Brooks, Hamish A. Malcolm, John M. Pandolfi, Roberto Salguero-Gomez, Maria Beger
Summary: By surveying coral individuals in Australia and Japan from 2016 to 2019, this study explores the spatial variation in the short- and long-term dynamics of competitive, stress-tolerant, and weedy coral assemblages and how abiotic variability affects their structural composition. The study finds that coral assemblages can reduce their vulnerability to stochastic environments by focusing on short-term potential, but competitive coral taxa have a reduced ability to elevate their short-term potential compared to stress-tolerant and weedy assemblages. Future climatic shifts may threaten the structural complexity of coral assemblages in variable environments.
Article
Materials Science, Multidisciplinary
Ali Gunen, Mourad Keddam, Azmi Erdogan, Mustafa Serdar Karakas
Summary: Monel 400 was borided at temperatures between 1173-1273 K for 2-6 hours, producing boride layers with thicknesses ranging from 35-290 μm and hardness between 1002-1476 HV0.025. SEM observations showed a smooth interface between the boride layer and the diffusion zone. Kinetic modeling based on the integral method estimated the boron activation energy in the Ni2B layer as 300.7 kJ mol(-1). An experimental validation of the model was done by comparing the predicted and experimental layer thicknesses after boriding at 1198 K for 1 and 3 hours.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Forestry
Jiazheng Wang, Xianyu Yang, Gabriel Silva Santos, Hongtao Ning, Tian Li, Wenhao Zhao, Xiaoqian Si, Sihang Lu, Shouzhong Li
Summary: Understanding the mechanisms behind plant species persistence in temporally variable environments is crucial in ecology. This study focused on two hypotheses, the demographic buffering hypothesis (DBH) and the demographic lability hypothesis (DLH), and evaluated their validity in pioneer tree species during ecological restoration. The findings suggest that diverging demographic strategies, driven by among-plot variation in reproduction, contribute to the persistence of pioneer tree species in subtropical forest restoration.
FOREST ECOLOGY AND MANAGEMENT
(2023)
Article
Thermodynamics
Fan Fan, Qihao Xu, Dongliang Zhao
Summary: Radiative cooling is an effective method for energy saving, but its performance is affected by dust deposition outdoors. This study used equivalent particle and Rosseland diffusion approximation models to predict the heat transfer properties of radiative cooling surfaces with different levels of dust deposition. The results showed that dust deposition significantly reduced the net cooling power and changed the heat flow characteristics, with high levels of dust deposition leading to a constant reduction in net heat gain.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Computer Science, Interdisciplinary Applications
Antonino Vacalebre, Silvano Pitassi, Ruben Specogna
Summary: Volume integral methods are attractive for solving eddy current problems due to their ability to mesh only the conducting regions. However, these methods require assembly and storage of a dense stiffness matrix. To address this limitation, low-rank approximation techniques like the Adaptive Cross Approximation (ACA) have been considered a breakthrough. The recent VINCO framework introduces a novel factorization of the dense stiffness matrix to significantly reduce memory occupation and compute time. This paper introduces a new matrix compression technique enabled by the VINCO framework, and compares its performance with state-of-the-art alternatives in terms of memory occupation, computational time, and accuracy.
COMPUTER PHYSICS COMMUNICATIONS
(2023)
Article
Ecology
Chloe R. Nater, Atle Rustadbakken, Torbjorn Ergon, Oystein Langangen, S. Jannicke Moe, Yngvild Vindenes, Leif Asbjorn Vollestad, Per Aass
Article
Ecology
Leonie Farber, Joel M. Durant, Yngvild Vindenes, Oystein Langangen
MARINE ECOLOGY PROGRESS SERIES
(2018)
Editorial Material
Ecology
Sandra Hamel, Jean-Michel Gaillard, Nigel G. Yoccoz, Ron D. Bassar, Sandra Bouwhuis, Hal Caswell, Mathieu Douhard, Eric J. Gangloff, Olivier Gimenez, Phylis C. Lee, Isabel M. Smallegange, Ulrich K. Steiner, Oscar Vedder, Yngvild Vindenes
Article
Ecology
Hal Caswell, Yngvild Vindenes
Editorial Material
Ecology
Torbjorn Ergon, Ornulf Borgan, Chloe Rebecca Nater, Yngvild Vindenes
METHODS IN ECOLOGY AND EVOLUTION
(2018)
Article
Ecology
Leonie Farber, Joel M. Durant, Yngvild Vindenes, Oystein Langangen
MARINE ECOLOGY PROGRESS SERIES
(2018)
Article
Ecology
Jan Ohlberger, Oystein Langangen, Ian Winfield, Yngvild Vindenes
Article
Ecology
Marlene Waege Stubberud, Yngvild Vindenes, Leif Asbjorn Vollestad, Ian J. Winfield, Nils Christian Stenseth, Oystein Langangen
ECOLOGY AND EVOLUTION
(2019)
Letter
Ecology
Judy Che-Castaldo, Owen R. Jones, Bruce E. Kendall, Jean H. Burns, Dylan Z. Childs, Thomas H. G. Ezard, Haydee Hernandez-Yanez, David J. Hodgson, Eelke Jongejans, Tiffany Knight, Cory Merow, Satu Ramula, Iain Stott, Yngvild Vindenes, Hiroyuki Yokomizo, Roberto Salguero-Gomez
ECOLOGICAL MODELLING
(2020)
Article
Ecology
Chloe R. Nater, Yngvild Vindenes, Per Aass, Diana Cole, Oystein Langangen, S. Jannicke Moe, Atle Rustadbakken, Daniel Turek, Leif Asbjorn Vollestad, Torbjorn Ergon
JOURNAL OF ANIMAL ECOLOGY
(2020)
Article
Ecology
Christie Le Coeur, Nigel G. Yoccoz, Roberto Salguero-Gomez, Yngvild Vindenes
Summary: This study decomposes stochastic growth rate into components arising from nonlinear responses and demographic parameters, to study the joint effects of buffering and lability. Results suggest that faster-living species are more responsive to environmental fluctuations and have a higher potential for adaptive demographic lability, while slower-living species predominantly rely on demographic buffering strategy.
Article
Ecology
Viktor Thunell, Anna Gardmark, Magnus Huss, Yngvild Vindenes
Summary: Body size-dependent physiological effects of temperature influence individual growth, reproduction, and survival, which govern animal population responses to global warming. In this study, a dynamic energy budget integral projection model (DEB-IPM) was developed to investigate how warming affects the optimal energy allocation and adaptation of size-structured organisms. The results show that increasing temperature leads to a decrease in optimal energy allocation to growth and induces changes in body size and population structure.
Article
Biology
Asena Goren, Hildegunn Viljugrein, Inger Maren Rivrud, Solveig Jore, Haakon Bakka, Yngvild Vindenes, Atle Mysterud
Summary: Climate change has caused significant changes in seasonal weather patterns and phenology in various species. However, there is limited empirical research on the impact of these changes on the emergence and seasonal dynamics of vector-borne diseases. Lyme borreliosis, the most common vector-borne disease in the northern hemisphere, has been increasing in incidence and geographical distribution. An analysis of long-term surveillance data from Norway shows a marked change in the timing of Lyme borreliosis cases, with the peak now occurring six weeks earlier than 25 years ago. This study highlights the potential for climate change to shape the seasonal dynamics of vector-borne diseases.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Public, Environmental & Occupational Health
Asena Goren, Atle Mysterud, Solveig Jore, Hildegunn Viljugrein, Haakon Bakka, Yngvild Vindenes
Summary: Lyme borreliosis, the most common vector-borne disease in Europe and North America, has been expanding its geographic range recently. Climate and land-use changes are believed to contribute to the increasing incidence and spread of the disease. This study analyzed 25 years of surveillance data from Norway to investigate the demographic patterns in clinical manifestations and seasonal case timing of Lyme borreliosis. The findings highlight the importance of considering patient demographics when studying the emergence and seasonal patterns of vector-borne diseases.
ZOONOSES AND PUBLIC HEALTH
(2023)
Article
Ecology
Yngvild Vindenes, Rolf Langvatn, Atle Mysterud
Summary: Large mammals at northern latitudes experience seasonal cycles of body mass gain and loss, which vary across ontogeny depending on trade-offs between growth and other life history traits. However, there is currently no detailed model of how this seasonal growth develops. In this study, a new seasonal growth model was developed and applied to body mass data from captive red deer in Norway. The best fitting model included two seasonal components and revealed that the timing of the annual peak shifts through ontogeny, with males growing bigger and showing larger seasonal amplitudes compared to females. This new growth model provides a flexible framework for studying seasonal growth in different species.
Article
Ecology
Jorge Pena, Aviad Heifetz, Georg Noldeke
Summary: Cooperation usually becomes harder to sustain as groups become larger, but in some cases, increasing group size can increase the probability of cooperation. The expected payoff and the probability of provision of the public good vary with the cost of cooperation.
THEORETICAL POPULATION BIOLOGY
(2024)
