Article
Biodiversity Conservation
Jaap van Der Meer, Eelke Folmer
Summary: This article discusses the impact of cockle dredging on marine conservation goals in the Dutch Wadden Sea, and challenges the conclusions of two influential papers that had deficiencies in data selection and analysis.
JOURNAL OF APPLIED ECOLOGY
(2023)
Article
Entomology
Candace Clark, Thomas J. Hossie, David Beresford
Summary: Research suggests that density-dependent cannibalism is likely to increase in dragonfly nymphs during the winter, with only smaller nymphs being preyed upon. Field surveys indicated that fewer nymphs were caught in the late winter, with larger sizes observed.
ENVIRONMENTAL ENTOMOLOGY
(2021)
Article
Plant Sciences
Kirstie Hazelwood, Harald Beck, C. E. Timothy Paine
Summary: Fungal pathogens play a crucial role in density-dependent interactions among seedlings in tropical forests, impacting their growth and species diversity significantly.
JOURNAL OF ECOLOGY
(2021)
Article
Mathematics, Applied
Saheb Pal
Summary: The hydra effect, which refers to the increase of a species' mean density in response to greater mortality, has recently become an interesting research topic. This phenomenon is important to understand in the field of conservation biology and population management. The present paper investigates the presence of the hydra effect in two-species unstructured predator-dependent functional response models and finds that it is exhibited in the prey species when predators exhibit positive density-dependence and in the predator species when predators exhibit negative density-dependence.
DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES B
(2023)
Article
Multidisciplinary Sciences
Hiroshi Okamura, Yutaka Osada, Shota Nishijima, Shinto Eguchi
Summary: Nonlinear phenomena in ecology pose challenges for inference and prediction due to autocorrelation and outliers. Traditional least squares and least absolute deviations methods have limitations, leading to the development of a new robust regression approach that accurately estimates autocorrelation while reducing the influence of outliers. Simulations and real data analysis demonstrate that the new method outperforms existing methods in long-term and short-term prediction of nonlinear estimation problems in spawner-recruitment data.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Gyun-Tack Bae, Christine M. Aikens
Summary: The plasmonic properties of tetrahedral aluminum nanoparticles were studied using TDDFT calculations. The results indicate a red-shift of absorption peaks with increasing nanoparticle size.
JOURNAL OF COMPUTATIONAL CHEMISTRY
(2022)
Article
Mathematics
Haiyin Li, Xuhua Cheng
Summary: This paper investigates the stability of equilibrium in the stage-structured and density-dependent predator-prey system with Beddington-DeAngelis functional response. The study includes local stability analysis of origin and boundary equilibrium, exploration of positive equilibrium stability for different time delay parameters, and qualitative analysis of global asymptotical stability. Numerical examples are provided to illustrate the obtained results.
Article
Ecology
Niels M. Schmidt, Floris M. van Beest, Angelique Dupuch, Lars H. Hansen, Jean-Pierre Desforges, Douglas W. Morris
Summary: Habitat selection in collared lemmings is density-dependent and influenced by variability in snow conditions. Larger nests, often used for breeding, are more susceptible to predation.
Article
Fisheries
Mark N. Maunder
Summary: The Ricker and Beverton-Holt stock recruitment relationships show that changes in adult abundance can strongly influence juvenile survival even at low biomass levels. This suggests that factors other than resource limitation, such as changes in predation risk, control density dependence. A simple habitat limitation model and a generalized logistic survival stock-recruitment model are proposed to explain these relationships. The findings have important implications for fisheries management and understanding the population dynamics of different species.
FISHERIES RESEARCH
(2022)
Article
Fisheries
Jasper C. Croll, Tobias van Kooten, Andre M. de Roos
Summary: Density dependence plays a regulatory role in recovering fish stocks and affects both reproduction and individual growth. Recent research shows that density dependence is linked to resource availability and individual life history processes. Managing fish stocks should take into account the impact of density dependence on individual growth.
FISH AND FISHERIES
(2023)
Review
Ecology
Xiaoyang Song, Jun Ying Lim, Jie Yang, Matthew Scott Luskin
Summary: The study conducted the largest meta-analysis of experimental studies to date and found little evidence of distance- or density-dependent mortality among host plants. There was significant variation in response among species, with a strong signal of distance-dependent mortality among seedlings. The study suggests that Janzen-Connell effects may not be as pervasive as widely thought, and highlights the importance of understanding the variation in these effects for refining our understanding of species coexistence.
Article
Engineering, Geological
Miao Yu, Haitao Luo, Hongdi Jing, Xingfan Zhang
Summary: In this study, high-speed cameras and optical microscopy were used to investigate the influence of water content on the dynamic compressive strength of sandstones and the evolution of microcracks. The results showed that water content can weaken the dynamic compressive strength of sandstones and influence the rate dependence of strength and energy dissipation.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2023)
Article
Ecology
Edeline Eric, Loeuille Nicolas
Summary: Harvesting can lead to body downsizing and population declines, which are not only direct consequences of harvest selection but also result from changes in ecological features, indirectly reshaping natural selection through eco-evolutionary feedback loops.
Article
Ecology
Lukasz Dylewski, Yvette K. Ortega, Michal Bogdziewicz, Dean E. Pearson
Summary: Previous studies have shown that small mammals impact plant recruitment globally through size-dependent seed predation, resulting in a unimodal pattern across ecosystems. Despite critiques on seed removal analysis by Chen et al. (2021) advocating for corrections in exposure time, we argue that such manipulations are unwarranted and emphasize the importance of plant recruitment metrics.
Article
Ecology
Thomas C. Adam, Sally J. Holbrook, Deron E. Burkepile, Kelly E. Speare, Andrew J. Brooks, Mark C. Ladd, Andrew A. Shantz, Rebecca Vega Thurber, Russell J. Schmitt
Summary: The outcomes of species interactions can vary greatly in time and space, and this study found that benthic algae can colonize coral reefs and inhibit reef-building corals in the absence of herbivorous fishes. However, corals can also inhibit colonization by macroalgae. The experiments also showed that juvenile corals have a strong priority effect in suppressing macroalgae, even in the absence of herbivores.
Article
Ecology
Katja J. Geiger, Julio Arrontes, Antonella Rivera, Consolacion Fernandez, Jorge Alvarez, Jose Luis Acuna
Summary: A two-year experiment was conducted to investigate the impact of Pollicipes pollicipes harvest on intertidal community structure and ecological diversity. The study found that intensive exploitation resulted in a decrease in P. pollicipes and Mytilus spp. coverage, while Chthamalus spp. and Corallina spp. increased. The recovery of P. pollicipes aggregations was slow and variable, but their coverage increased under non-extracted conditions.
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
(2024)
Article
Ecology
Daniel Castro Martignago, Leandro Godoy, Amanda Pereira Amaral, Guendalina Turcato Oliveira
Summary: This study evaluates the effects of bleaching on the oocytes of the Mussismilia harttii coral and investigates the strategies employed by these cells to maintain antioxidant balance and cellular homeostasis. The research finds that bleached coral oocytes experience lipid damage, but are still able to maintain their quality and potentially elongate their lifespan and fertilization capability. This response may be linked to an intensification of heterotrophy in bleached corals.
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
(2024)